VIN
vcc VOUT
cm J. MP5018
10pFI VCC VOUT
= vcc VOUT
”ML“ 0— SAS ILIMIT
Enable 0* EN/FAULT SS
NC GND
_'T
Com
””1
MP5018
5V, 1A-5A Current Limit Switch
with Reverse Current Blocking
and Output Over-voltage Clamp
MP5018 Rev. 1.02 www.MonolithicPower.com 1
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The Future of Analog IC Technology
DESCRIPTION
The MP5018 is a protection device designed to
protect circuitry on the output from transients on
input (VCC). It also protects VCC from undesired
shorts and transients coming from the output.
At startup, inrush current is limited by the slew
rate at the output. The slew rate is controlled by
a small capacitor at the SS pin. Floating the SS
pin provides 13ms soft-start time.
The maximum load at the output is current
limited. The magnitude of the current limit is
controlled by an external resistor from ILIMIT to
GND. Floating ILIMIT pin provides 3A fixed
current limit. By controlling the gate voltage of a
pair of N-channel MOSFETs, any current
flowing from output to input is blocked.
Under Voltage Lockout (UVLO) assures that
input is above the minimum operating threshold,
before the power device is turned on. If input
voltage goes above 5.8V, the output voltage will
be limited at 5.8V with fast response.
The EN/Fault pin is a bi-directional, three-level
I/O with a weak pull-up. It can be used to
enable or disable MP5018, or indicate a fault
condition.
The device is available in a QFN12 (2mmx3mm)
package.
FEATURES
• SAS Disable to support DEVSLP or
POWER_DOWN
• 4.5V to 5.5V Continued Operating Input
Range
• 16V Absolute Maximum Input Voltage
• 5.8V Fast OVP Response
• Reverse Current Blocking
• Integrated 45m Power FET
• Adjustable Current-Limit or Fixed Current
Limit when floating ILIMIT pin
• 210A Typical Low Quiescent Current
• Adjustable Soft Start time
• Fault Indication
• Latch-off Thermal Protection
• Available in QFN12(2mmx3mm) Package
• ESD Compliant to 2kV HBM and 1kV
CDM
APPLICATIONS
• HDD, SSD
• Hot Swap Systems
• Gaming
• Set-top Boxes/Smart TV
• PCIe Cards
• Switches/Routers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
l'l'IP5'
AND OUTPUT OVER-VOLTAGE CLAMP
AMAY
LLL
TOP VIEW
GND
ch vouT
vcc ' VOUT
vcc ' vou'r
5A5 ' \LWHT
E N/FAULT SS
TJ
r
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 2
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ORDERING INFORMATION
Part Number* Package Top Marking
MP5018GD QFN-12 (2mmx3mm)
See Below
* For Tape & Reel, add suffix –Z (e.g. MP5018GD–Z);
TOP MARKING
AMA: product code of MP5018GD;
Y: year code;
LLL: lot number;
PACKAGE REFERENCE
QFN-12 (2mmx3mm)
ABSOLUTE MAXIMUM RATINGS (1)
VIN ...................................................-0.3V to 16V
VOUT............................................................. 6.3V
All Other Pins.................................–0.3V to +6V
Junction Temperature.............. -40°C to +150°C
Lead Temperature ....................................260°C
Continuous Power Dissipation (TA=+25°C )(2)
QFN-12 (2mmx3mm) ................................. 1.8W
Recommended Operating Conditions (3)
Continued Operation VIN .................4.5V to 5.5V
Operating Junction Temp. (TJ). -40°C to +125°C
Thermal Resistance (4) θJA θJC
QFN-12 (2mmx3mm).............…70........15 °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-to-
ambient thermal resistance JA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/JA. Exceeding the maximum allowable powe
r
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
"'5 AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 3
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ELECTRICAL CHARACTERISTICS
VIN = 5V, TJ =25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Supply Current
EN=1, SAS=0, ILoad=0 210 250 A
Fault latch off 170 A
EN=0, SAS=0 (or Float) 50 A
Quiescent Current IQ
SAS=1 5 A
Power FET
ON Resistance RDSon T
J=25°C 45 58 m
ON Resistance(5) R
DSon T
J=80°C 54 m
Turn-on Delay Tdelay EN=2.5V to ID=100mA with 1A
load resistor 500 s
Off-State Leakage Current IOFF V
IN=12V, EN=0V 1 A
Soft Start
SS Time tSS SS pin float, VOUT=0%-100% 10.4 13 15.6 ms
SS Current ISS Short SS to GND or add SS cap 6.5 A
Current Limit
Float ILIMIT pin 2.5 3 3.5 A
Rset=499 1.8 2.3 2.7 A
Current Limit at Normal
Operation ILimit_NO
Rset=1.4k 0.5 0.8 1.1 A
Short Circuit Current Limit(5) I
Limit_SC Float ILIMIT pin 3 A
Current Limit Response
Time(5) tCL I
LIMIT=3A, add 1 load resistor 5.5 10 40 s
Secondary Current Limit(6) I
LimitH Any value of RISET 12 A
Under Voltage Protection
Under Voltage Lockout
Threshold VUVLO UVLO Rising Threshold 3.8 4.0 4.2 V
UVLO Hysteresis VUVLOHYS 300 mV
Under Voltage Response(5) t
UV 2 s
Reverse Current Limit
Reverse Current Limit IReverseH Latch off and pull EN to mid
level voltage 0.9 1.2 1.5 A
Reverse Current Limit
Response Time(5) tSC Vin dv/dt = -5V/1mS 5 7 10 s
Over Voltage Protection
Over Voltage Clamp Voltage VOVLO 5.5 5.8 6.1 V
"IE AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 4
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ELECTRICAL CHARACTERISTICS (continued)
VIN = 5V, TJ =25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Over Voltage Response
Time(5) tOV Cout=20uF, VIN=5V to 12V 10 40 s
Thermal Shutdown
Shutdown Temperature(5) t
STD Latched off until Enable = 0,
SAS = 1, POR 130 175 200 °C
Enable/Fault
Low Level Input Voltage VIL UVLO, SAS Disable 0.35 0.8 V
Intermediate Level Input
Voltage VI (INT) Thermal fault, fast reverse
current limit 0.9 1.3 1.95 V
High Level Input Voltage VIH Output Enabled 2.1 3.3 V
Maximum High State VENH 3.4 5.2 V
Logic Low Sink Current IEH_PL EN=0V -12 -20 A
Logic Level High Current IH EN = 3.3V 1 A
Maximum Fanout for Fault
Signal
Total number of chips that
can be connected for
simultaneous shutdown
3 Units
SAS Disable
Low Level Input Voltage VENN_L EN=1, Output enabled 0.35 0.7 V
High Level Input Voltage VENN_H Output Disabled, EN=low 2.1 V
Maximum pin voltage SASHmax 3.3 V
Input Impedance RENN To GND 350 700 1000 k
Deglitch Filter tSASDG 2 50 s
Notes:
5) Guarantee by characterization test.
6) Guarantee by design.
II'IME'
CURRENT LIMIT (A)
SUPPLV CURRENT (VA)
Current Limit vs.Rlimit
AND OUTPUT OVER-VOLTAGE CLAMP
Current Limit vs.
Input Voltage
RUW Float
Supply Current,
Outp
ut Enabled
vs. In ut Volta e
Noloadp g
2;
i Z
\ I: E
g n:
V i g
\ 2 °
Lu >
E E
\ 3 5 /
/
Ruwm) INPUT VOLTAGE (V) INPUT VOLTAGE (V)
Supply Current, Rps 0N vs. Input Voltage Input to Output Voltage
Output Disabled IwzfisA vs. Load Current
vs. Input Voltage
VEN=OV
’>‘
E
m
0
A E
G O
E >
V \ F
E) \\ E
o S
“C o
,9
E
3
a.
Z
/
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
O
UTPuT CURRENT (A)
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 5
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TYPICAL PERFORMANCE CHARACTERISTICS
VIN=5V, VEN=5V, ILIMIT Pin Float, SS Pin Float, SAS Pin Float, COUT=22μF, TA=25°C, unless
otherwise noted.
40
43
46
49
52
55
4 4.3 4.6 4.9 5.2 5.5
28
34
40
46
52
3.9 4.4 4.9 5.4 5.9 6.4
195
210
225
240
255
270
285
300
3.7 4.2 4.7 5.2 5.7 6.2 6.7
2
2.5
3
3.5
4
4.5
4 4.3 4.6 4.9 5.2 5.5
0
1
2
3
4
5
6
0 200 400 600 800 1000 1200
0
20
40
60
80
100
120
140
0 0.5 1 1.5 2 2.5
mp5 AND OUTPUT OVER VOLTAGE CLAMP
Startup through Startup through Startup through
Input Voltage Input Voltage Input Voltage
En Hoax, No Load En Float RLOAD : 3.3a En Float No Load‘ com : 2200p;
. i h
f‘“"“"‘“‘ r“.
V V ~./
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v v
svlm‘c‘ - ”Glyn
EN ENE
Sv‘law W svl/mv ’—
our
1/1/le ~ we’ll
Amsldlv AmS/dlv 4ms/dlv
Stanup through Enable Startup through Enable Stanup through Enable
No Load RLOAD : 3 an No mad. cow : 220mm
i i i l ‘
/........__.. W
V V _/ J
Mm“? with
v v
ml“? swab“
EN EN
5V/dw@_ Sv/dw@_ '—
‘OUY IOUT
1Amw wow
Ams/dlv Ams/dlv Ams/dlv
Startup through SAS Startup through SAS Startup through SAS
No Load RLOAD:3 30 No Load‘ COUT:2200uF
i ‘ ‘ i ‘ ‘ i ‘ ‘
/._..__.. ._.....____ .._.._...._.
V0” V ___/ V ..__/
WNW—“- zfilw MW
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www.— WWW Wm...
SAS SAS SAS
swan/w 5mm” ._...... “.7 SV/dlv
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MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 6
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TYPICAL PERFORMANCE CHARACTERISTICS
(continued)
VIN=5V, VEN=5V, ILIMIT Pin Float, SS Pin Float, SAS Pin Float, COUT=22μF, TA=25°C, unless
otherwise noted.
Ps'
AND OUTPUT OVER-VOLTAGE CLAMP
Shutdown through Shutdown through Shutdown
Input Voltage Input Voltage through Enable
No Load mama so No Load
5 ii
v Vour v
ngjLilV'W _..___.. QV/divfi‘ m wild” “ —‘ —‘
VIN v‘N N Vw
swam? swwr swam
EN EN
svl/awP 5V/div I‘m 5mm"
i i
will . 2&3in % Mfl .
20ms/div ZmS/div ZOmSIdiv
Shutdown Shutdown Shutdown
through Enable through SAS through SAS
waam No Load RLOADQJD
i .i\ ‘ a
V VOUT \ V
Milli “~— 2mm!“ Milli
V V
waldo”... small“? Wm
EN SAS
5V/div. swam svmwfi“.
| \ l m
MW ZA/dw MEX/T1
maps/div. 1s/div lOOus/dlv
Short Circuit Short Circuit OVP Response
before Input Voltage Startup, during Normal Operation, Vw from 5V to 7 5V
and Thermal Shutdown and Thermal Shut Down
5 ‘ i)
Vour, P
ZV/div V
Gum
v 2V/dw. Vow
SV/dildi a... 2V/sw ‘
EN N W
5‘”va —_ 5V/mv 2mm
\ 1—__‘ EN/FAULT
sv/awW ,___~1 5V/div ‘V
I i l i
Mil." will.“ «WW
zoms/dw. Zflms/dlv Aflusldlv
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 7
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TYPICAL PERFORMANCE CHARACTERISTICS
(continued)
VIN=5V, VEN=5V, ILIMIT Pin Float, SS Pin Float, SAS Pin Float, COUT=22μF, TA=25°C, unless
otherwise noted.
mm AND OUTPUT OVER-VOLTAGE CLAMP
Current Limit
\ncrease Iom Slowly
VOUT
ZV/dwv
Vw
swaw
EN/FAuLT
5V/dw
‘our
2A/dw “
1 DO Ins/div.
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 8
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TYPICAL PERFORMANCE CHARACTERISTICS
(continued)
VIN=5V, VEN=5V, ILIMIT Pin Float, SS Pin Float, SAS Pin Float, COUT=22μF, TA=25°C, unless
otherwise noted.
"IE AND OUTPUT OVER-VOLTAGE CLAMP
limi‘
ng
pin
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 9
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PIN FUNCTIONS
Pin # Name Description
1, 2, 3 VCC
Supply Voltage. The MP5018 support 4.5V to 5.5V continuous input voltage and up to
16V maximum transient input voltage. Requires ceramic capacitor to decouple the input
rail. Connect using a wide PCB trace.
4 SAS
SAS=low to enable the part. SAS=high to disable the part. SAS pin has internal 700k
pull-down resistor to ground, so it can automatically start up when SAS is floating.
5 EN/FAULT
The EN/FAULT pin is a tri-state, bi-directional interface. It can be used to enable the
output of the device by floating the pin, or disable the chip by pulling it to ground (using
an open drain or open collector device). If a thermal fault occurs or reverse current limit
is triggered, the voltage on this pin will go to an intermediate state to signal a monitoring
circuit that there is a device fault. When UVLO or SAS disable = 1, the voltage on this pin
will go to a low state. It can also be connected to another device in this family to cause a
simultaneous shutdown.
6 NC No Connection.
7 SS
Soft start pin. Connect a capacitor from SS to ground to set the soft start time. Floating
this pin provides 13ms soft start time.
8 ILIMIT
Current Limit Set pin. Place a resistor between this pin and ground to set the value of the
current limit. Floating this pin provides 3A fixed current limit.
9, 10,
11 VOUT The output voltage that is controlled by the IC.
12, Pad GND System Ground.
"IE AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 10
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FUNCTIONAL BLOCK DIAGRAM
Charge
Pump
LDO Current
Sense
1V
Ref
ILIMIT
VOUT
SS
Control Logic
UVLO
OVP
1.23V
EN/FAULT
4uA 8uA
80KΩ
VDD
GND
Fast Off Comp
Current Limit Amp
Soft Start
Thermal
Sense
6.5uA
5V
Reverse
Comp
X10
VOUT
SAS
VDD
FLT
Logic
13ms
0.7MΩ
VDD
Logic for
ILIMIT floating
VCC
Figure 1: Functional Block Diagram
"IE AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 11
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OPERATION
The MP5018 is designed to limit the inrush
current to the load when a circuit card inserts
into a live backplane power source, thereby
limiting the backplane’s voltage drop and the
dV/dt of the voltage to the load as well. It offers
an integrated solution to monitor the input
voltage, output voltage, output current, and die
temperature which eliminates the requirement
of external current sense power resistor, power
MOSFET and thermal sense device.
Under-Voltage Lockout (UVLO)
If the supply voltage is below the UVLO
threshold, the output is disabled, and the
EN/Fault line is driven low. When the supply
goes above the UVLO threshold, the output is
enabled and the EN/Fault is pulled high.
The nominal input supply voltage is 5V but
there are high energy transients during normal
operation or during hot swap. Those transients
depend on the parasitic inductance and
resistance of the wire along with capacitor at
VCC node. If power clamp (TVS, Tranzorb)
diode is not used, E-Fuse must be able to
withstand this transient voltage. MP5018
integrates high voltage MOSFET up to 16V and
also uses high voltage circuit for VCC node to
guarantee safe operation.
Fast Output over Voltage Clamp (OVP)
To protect the downstream loading when there
is a surge voltage at input, MP5018 provides an
accurate and fast comparator to monitor the
over voltage condition of output. If the output
voltage rises above the threshold (5.8V), the
gate of internal MOSFETs is quickly pulled
down and it’s regulated to a certain value to
maintain the output voltage clamped at 5.8V.
The fast loop response speed (10µs typical)
keeps the over voltage overshoot small.
Current Limit
The MP5018 provides a constant current limit
and the current limit can be programmed by
external resistor. Once the current limit
threshold is reached, the internal circuit will
regulate gate voltage to hold the current in
power FET constantly. In order to limit the
current, the gate to source voltage needs to be
regulated from 5V to around 1V. The typical
response time is about 10µs, during this period
the output current may have a small overshoot.
The desired current limit is a function of the
external current limit resistor.
MP5018 allows ILIMIT pin floating operation. If
ILIMIT pin is floating, the current limit will be set
as fixed 3A internally.
Reverse Current Blocking
The MP5018 integrates a pair of back-to-back
N channel MOSFETs for reverse current
protection. Once the reverse current limit
threshold (-1.2A) is reached and exceed 7s
deglitch time, the internal circuit will shutdown
the pair of MOSFETs. Meanwhile, the EN/Fault
line is driven to middle level; reverse current is
totally blocked and this state continues until
VCC > VOUT-2mV. When VCC >VOUT-2mV,
part resumes normal operation with soft-start
control. Whenever the input voltage drops
below UVLO threshold, back-to-back MOSFETs
are turned off and the part is shut down;
therefore, there is no reverse current during this
condition.
Short Circuit Protection
If the load current increases rapidly due to short
circuit event, the current may exceed the
current limit threshold before control loop able
to respond. If the current reaches 12A
secondary current limit level, there is a fast turn
off circuit active to turn off the power FET with
100mA pull-down gate discharge current, as
shown in Figure 1. This can help to limit the
peak current through the switch, thus keep the
input voltage not drop too much. The total short
circuit response time is about 1µs. After the
FET is switched off, the part will restart. During
the restart process, if the short still exist,
MP5018 will regulate the gate voltage to hold
the current at normal current limit level.
"IE AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 12
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EN Control/Fault Indication
The EN Pin enables the part when high and
disables the part when low. Floating the EN pin
will set the part auto startup because there is
internal current source pull up EN to internal
supply. The maximum internal pull up voltage
source is about 5V. EN/Fault pin is also a bi-
directional function node. When the part
entersthermal shutdown, EN/Fault pin outputs
middle level voltage ~1.3V to indicate fault
condition occurred. When VIN<UVLO threshold
or the SAS pin is high, the EN pin will be pulled
to GND through an internal resistor.
Table 1: Enable/Fault Function
Description Enable/Fault EFuse State Latch
Under Voltage Lock Out Low Off No
SAS = High Low Off No
Thermal Shutdown Mid Off Yes
Reverse Current Protection Mid Off No (part restarts when
VCC>VOUT -2mV)
SAS Floating High On N/A
SAS = Low High On N/A
SAS Control
The SAS pin also can control the part startup
and shutdown. When floating this pin or pull it
low, it enables the part and disables the part
when pull high.
Soft-Start
Floating SS pin can get 13ms soft start time.
While a capacitor connected to the SS pin can
set the soft start time. A constant current source
charges the SS capacitor and results in a linear
ramping voltage on the SS pin. The output
voltage rises at a similar slew rate to the SS
voltage.
The soft-start time can be calculated as follows:
ss
ss
1V C (n F )
t(ms) 6.5 A
×
=μ
Where:
tSS=soft start time
For example, a 22nF capacitor gives a soft start
time of ~3.4ms.
If the load capacitance is extremely large, the
current required to maintain the preset soft start
time will exceed the current limit. In this case
the rise time is controlled by the load capacitor
and the current limit.
Thermal Shutdown – Latch Off
Thermal shutdown prevents the chip from
operating at exceedingly high temperature.
When the silicon die reaches temperature that
exceeds 175°C, it shuts down the whole chip,
and drives the Enable/Fault line to the middle
(MID) level. The chip is latched off after trigger
the thermal protection and it restarts when
toggle the EN or SAS or recycle the input
supply.
HIPS
AND OUTPUT OVER-VOLTAGE CLAMP
Current Limit (A)
O
0
\
\5—
200 400 600 800 10001200
RUMIHQ)
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 13
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APPLICATION INFORMATION
Setting the Current Limit
The MP5018 current limit value should exceed
the normal maximum load current, allowing the
tolerances in the current sense value. The
current limit is a function of the external current-
limit resistor. Table 2 and Figure 2 list examples
of current limit values as a function of the
resistor value.
Table 2: Current Limit vs. Current Limit Resistor
Current Limit
Resistor (Ω) 1070 560 442 274 215
Current Limit
(A) 1 2 2.5 4 5
Figure 2: Current Limit vs. Current Limit
Resistor
PCB Layout Guide (7)
PCB layout is benefit for better performance.
Please follow these guidelines and use Figure 3
as reference.
1. Place the high-current paths (VCC and
VOUT) close to the device using short, direct,
and wide traces.
2. Place the input capacitors as close to the
VCC and GND pins as possible.
3. Connect the VCC and VOUT pads to large
copper to achieve better thermal performance.
4. Place current limit resistor R1 close to the
ILIMIT pin.
5. Place SS capacitor C2 close to SS pin.
Note: The recommend layout is based on the typical application
circuit shown in figure 4.
C1 C3
C2
R1
EN
SAS
GND
GND
VCC
VCC
VCC
VOUT
VOUT
VOUT
GND
Top Layer
Bottom Layer
GND
Figure 3: PCB Layout
Design Example
Below is a design example following the
application guidelines for the given
specifications:
Table 3: Design Example
VIN (V) 5
Current Limit (A) 3
SS Time (ms) 13
The detailed application schematic is shown in
Figure 4. The typical performance and circuit
waveforms have been shown in the Typical
Performance Characteristics section. For more
detailed device applications, please refer to the
related Evaluation Board Datasheets of
MP5018.
"IE AND OUTPUT OVER-VOLTAGE CLAMP
1H
’7‘
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
MP5018 Rev. 1.02 www.MonolithicPower.com 14
3/23/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
TYPICAL APPLICATION CIRCUITS
C1
10 FC3
22 F
SSEN/FAULT
SAS ILIMIT
GND
VOUT
VOUT
VOUT
R1
(Optional )
VIN VOUT
1
2
3
4
57
8
9
10
11
12, Pad
Power_dn
Enable
NC
6
VCC
VCC
VCC
C2
(Optional)
MP5018
Figure 4: 5V VIN Application
MP5018C3
10 FC4
22 F
SSEN/ FAULT
SAS ILIMIT
GND
VOUT
VOUT
VOUT
R1
(Optional)
5V Vout2
1
2
3
4
57
8
9
10
11
12, Pad
Power_dn
NC
6
VCC
VCC
VCC
C5
(Optional)
MP5000S
C1
10 F
C2
22 F
GND
dv/dt
Source
Rlimit
Vout1
5
4
3
2
110
9
8
7
6
N/C
I-Limit
Enable/Fault
Source
Source
Source
Source
VCC
11
12V
Cdv/dt
Figure 5: Simultaneous Shutdown Application
l'l'IP5'
FIN 1 ID r—‘
MARKING \b I
/ I
rm 1 In W i 7 *7
INDEX AREA I
x 7
I
TQP VIEW
I I i
s;
I_
SIDE VIEW
0.20m
\LL‘ H M
ii
Iil
EEF
ETT—gqj
RECOMMENDED LAND PATTERN
assume any legal responsibilin for any said applicaIions,
AND OUTPUT OVER-VOLTAGE CLAMP
I“): FIN 1 In
0.20” TYP
BOTTOM VIEW
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE
MOLD FLASH.
3) LEAD COPLANARITV SHALL BE 0.10
MILLIMETERS MAX.
4) JEDEC REFERENCE IS MO-ZZO.
5) DRAWING IS NOT TO SCALE.
MP5018 –5V, 1A-5A CURRENT LIMIT SWITCH WITH REVERSE CURRENT BLOCKING
AND OUTPUT OVER-VOLTAGE CLAMP
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP5018 Rev. 1.02 www.MonolithicPower.com 15
3/23/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
PACKAGE INFORMATION
QFN-12 (2mmx3mm)
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