Datenblatt für AP7167 von Diodes Incorporated

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AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

1 of 14

www.diodes.com September 2010

Description

The AP7167 is a 1.2A, adjustable output voltage, ultra-low

dropout linear regulator. The device includes pass element,

error amplifier, band-gap reference, current limit and thermal

shutdown circuitry. The device is turned on when EN pin is

set to logic high level. A Power-OK (POK) output is available

for power sequence control.

The characteristics of the low dropout voltage and low

quiescent current make it suitable for low to medium power

applications, for example, laptop computers, audio and video

applications, and battery powered devices. The typical

quiescent current is approximately 125µA.

Built-in current-limit and thermal-shutdown functions prevent

IC from damage in fault conditions.

The AP7167 are available in DFN3030-10 and SOP-8L

packages.

Features

• Wide input voltage range: 2.2V – 5.5V

• 230mV very low dropout at 500mA load

• 500mV very low dropout at 1A load

• 3% total accuracy over line, load and temperature

• Very low quiescent current (IQ): 125µA typical

• Adjustable output voltage range: 0.8V to 5.0V

• Very fast transient response

• High PSRR

• Accurate voltage regulation

• Current limiting and short circuit protection

• Thermal shutdown protection

• Stable with any type output capacitor ≥ 4.7µF

• Ambient temperature range -40ºC to 85 ºC

• DFN3030-10 and SOP-8L-EP: Available in “Green”

Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Pin Assignments

( Top View )

GND

OUT

POK

OUT

DFN3030-10

POK

OUT

GND

OUT

( Top View )

SOP-8L-EP

Applications

• Servers and laptops

• Smart phone and PDA

• MP3/MP4

• Bluetooth headset

• Low and medium power applications

• FPGA and DSP core or I/O power

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

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1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Typical Application Circuit

1µF

GND

OUT

Enable

10µF

VIN VOUT

POK

100kOhm

AP7167

⎟

⎠

⎞

⎜

⎝

⎛+= 2

REF

OUT

Pin Descriptions

Pin Name Pin # Description

DFN3030-10 SOP-8L-EP

IN 1, 2 1, 2 Voltage input pins, to be tied together externally. Bypass to ground

through at least 1µF capacitor.

POK 3 3 Power-OK output, active-high open-drain.

EN 5 4 Enable input, active high.

GND 6 5 Ground.

FB 8 6 Output feedback.

OUT 9, 10 7, 8 Voltage output pins, to be tied together externally. Bypass to ground

through at least 4.7µF ceramic capacitor.

NC 4, 7 NA No connection.

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1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

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Functional Block Diagram

GND

OUT

Gate

Driver

0.8V

0.744V

POK

Current Limit

and Thermal

Shutdown

Absolute Maximum Ratings

Symbol Parameter Ratings Unit

ESD HBM Human Body Model ESD Protection 4 KV

ESD MM Machine Model ESD Protection 300 V

VIN Input Voltage 7 V

OUT, FB, POK, EN Voltage VIN + 0.3 V

Continuous Load Current Internal Limited

TJ Operating Junction Temperature Range -40 ~ 150 °C

TST Storage Temperature Range -65 ~150 °C

PD Power Dissipation DFN3030-10 (Note 2, 4) 3.1 W

SOP-8L-EP (Note 2, 5) 4.0 W

Notes: 2. Ratings apply to ambient temperature at 25°C

Recommended Operating Conditions

Symbol Parameter Min Max Unit

VIN Input voltage 2.2 5.5 V

IOUT Output Current 0 1.2 A

TA Operating Ambient Temperature -40 85 °C

MSG Incol-nnAYEn TA °C, Vw Vow w , Com VEN Vw

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Electrical Characteristics

(TA = 25oC, VIN = VOUT +1V, CIN = 1µF, COUT = 10µF, VEN = VIN, unless otherwise stated)

Symbol Parameter Test Conditions Min Typ. Max Unit

IQ Input Quiescent Current IOUT= 0 ⎯ 125 180 µA

ISHDN Input Shutdown Current VEN = 0V, IOUT = 0 (Note 3) -1 0.1 1 µA

VDropout Dropout Voltage VOUT ≥ 1.5V, IOUT = 0.5A 230 mV

VOUT ≥ 1.5V, IOUT = 1A 500 800 mV

VREF FB reference voltage 0.8 V

IFB FB leakage ⎯ 0.01 1 µA

VOUT Output Voltage Total Accuracy Over line, load and

temperature -3 3 %

OUT

OUT V

ΔV

ΔV/ Line Regulation VIN = VOUT +1V to 5.5V,

IOUT = 1mA 0.02 %/V

ΔVOUT / VOUT Load Regulation IOUT from 1mA to 1A -1.5 1.5 %

tST Start-up Time, from EN high to POK

high VEN = 0V to 2.0V, IOUT =

100mA, VIN = 3.3V 190 µs

PSRR Power Supply Rejection Ratio 1kHz, VIN = 3.3V, VOUT = 1.2V,

IOUT = 100mA 60 dB

ILIMIT Current limit VOUT = 1.8V, ROUT = 0.5Ω 1.2 1.6 A

ISHORT Short-circuit Current VIN = 3.3V, VOUT < 0.2V 750 mA

VIL EN Input Logic Low Voltage 0.4 V

VIH EN Input Logic High Voltage 1.4 V

IEN EN Input leakage VEN = 0V or 5.5V ⎯ 0.01 1 µA

VOL POK output low voltage Force 2mA 100 200 mV

VPOK_TH_UP Output voltage (rising) POK threshold FB (or OUT for fixed version)

rising 87% 92% 97% Vref

VPOK_Hys Output voltage POK hysteresis 4% Vref

POK deglitch V

IN = 3.3V, VOUT = 1.2V 160 µs

IPOK_LK POK leakage current VPOK = 5.5V ⎯ 0.01 1 µA

TSHDN Thermal shutdown threshold 155 °C

THYS Thermal shutdown hysteresis 25 °C

θJA Thermal Resistance Junction-to-

Ambient

DFN3030-10 (Note 4) 40 oC/W

SOP-8L-EP (Note 5) 27 oC/W

Notes: 3. POK pin must be disconnected from IN pin.

4. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to

bottom layer 1.0”x1.5” ground plane.

5. Test condition for SOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and

thermal vias to bottom layer ground plane.

Typical Performance Characteristics

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Output Voltage vs. Temperature

3.20

3.25

3.30

3.35

3.40

-50 -25 0 25 50 75 100 125

Temperature (0C)

Output Voltage (V)

VOUT = 3.3V

Output Voltage vs. Temperature

1.10

1.15

1.20

1.25

1.30

-50-25 0 2550 75100125

Temperature (0C)

Output Voltage (V)

VOUT = 1.2V

Quiescent Current vs. Input Voltage

110

125

140

155

170

4.0 4.3 4.6 4.9 5.2 5.5

Input Voltage (V)

Quiescent Current (μA)

Iout=0mA

Iout=500mA

Quiescent Current vs. IOUT

100

110

120

130

140

150

160

170

0.0 0.2 0.4 0.6 0.8 1.0 1.2

IOUT (A)

Quiescent Current ( μA)

VIN=2.5V

VIN=3.3V

Quiescent Current vs. Temperature

110

125

140

155

170

-50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0

Temperature (0C)

Quiescent Current ( πA)

VIN=2.2V, Vout=1.0V

VIN=3.3V, Vout=1.8V

VIN=5.0V, Vout=3.3V

Reference Voltage vs. Temperature

0.790

0.795

0.800

0.805

0.810

-50-250 255075100125

Temperature (0C)

Reference Voltage (V)

Vin=2.2V

Vin=3.3V

Vin=5.5V

Typical Performance Characteristics (Continued)

VOUT=1.8V

VOUT=3.3V

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Line Regulation

-0 .1 0

-0 .0 5

0.00

0.05

0.10

3 .0 3. 5 4. 0 4. 5 5.0 5 .5

VIN (V)

Change in VOUT (%/V)

25°C

85°C

-40°C

Load Regulation

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

0.1

0.2

0.3

0.4

0.5

0.0 0.4 0.8 1.2

IOUT (A)

Change in VOUT (%)

25°C

85°C

-40°C

Short Circuit Current vs. Input Voltage

0.69

0.70

0.71

0.72

0.73

0.74

0.75

0.76

0.77

2.2 2.4 2.6 2.8 3 3.2 3.4

Input Voltage (V)

Short Circuit Current (A)

Short Circuit Current vs. Temperature

0.60

0.65

0.70

0.75

0.80

-50 -25 0 25 50 75

Temperature (oC)

Short Circuit Current (A)

Dropout Voltage vs. IOUT

100

200

300

400

500

600

700

0 0.2 0.4 0.6 0.8 1 1.2

IOUT(A)

Dropout Voltage (mV)

25°C

85°C

-40°C

PSRR

-80

-75

-70

-65

-60

-55

-50

-45

-40

100 1000 10000 100000

Frequency (Hz)

PS RR (dB)

VOUT=1.8V, IOUT=1mA VIN=2.2V, VOUT=1.2V,

VOUT=1.2V VOUT=1.2V

VOUT=3.3V

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1.2A LOW DROPOUT REGULATOR WITH POK

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Typical Performance Characteristics (Continued)

Line Transient Response

Time (5ms/div)

Line Transient Response

Time (500us/div)

Output Load Transient Response (VOUT=1.8V)

Time (100us/div)

Output Load Transient Response (VOUT=3.3V)

Time (100us/div)

Start-up Time (VOUT=1.2V, IOUT=0.1A)

Time (50us/div)

Start-up Time (VOUT=1.2V, IOUT=1.2A)

Time (50us/div)

VIN

2V/div

VOUT

50mV/div

VIN =3V to 5.5V

COUT =10uF

(Ceramic)

IOUT =200mA

COUT=470uF (electrolytic)

100mV/div

500mA/div

50mA

1.2A

1A/us

COUT=10uF (Ceramic)

COUT=1uF (Ceramic)

VOUT

IOUT

VIN

2V/div

VOUT

50mV/div

VIN =5.5V to 3V

COUT =10uF

(Ceramic)

IOUT =200mA

COUT=470uF (electrolytic)

100mV/div

500mA/div

50mA

1.2A

1A/us

COUT=10uF (Ceramic)

COUT=1uF (Ceramic)

VOUT

IOUT

VEN

2V/div

VOUT

1V/div

VPOK

2V/div

COUT=10uF

VEN

2V/div

VOUT

1V/div

VPOK

2V/div

COUT=10uF

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1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Typical Performance Characteristics (Continued)

Current Limit vs. Temperature

1.4

1.5

1.6

1.7

1.8

-50 -25 0 25 50 75 100

Temperature (oC)

Current Limit (A)

VIN =2.8V,Vout=1.8V

VIN =3.3V,Vout=1.8V

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AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Application Notes

Input Capacitor

A 1μF ceramic capacitor is recommended to connect

between IN and GND pins to decouple input power supply

glitch and noise. The amount of the capacitance may be

increased without limit. A lower ESR (Equivalent Series

Resistance) capacitor allows the use of less capacitance,

while higher ESR type requires more capacitance. This

input capacitor should be located as close as possible to

the device to assure input stability and less noise. For

PCB layout, a wide copper trace is required for both IN

and GND.

Output Capacitor

The output capacitor is required to stabilize and help the

transient response of the LDO. The AP7167 is designed to

have excellent transient response for most applications

with a small amount of output capacitance. The AP7167 is

stable for all available types and values of output

capacitors ≥ 4.7μF. The device is also stable with multiple

capacitors in parallel, which can be of any type of value.

Additional capacitance helps to reduce undershoot and

overshoot during transient. This capacitor should be

placed as close as possible to OUT and GND pins for

optimum performance.

Adjustable Operation

The AP7167 provides output voltage from 0.8V to 5.0V

through external resistor divider as shown below.

GND

OUT

Enable

VIN VOUT

POK

100kOhm R1

AP7167

CIN COUT

The output voltage is calculated by:

⎟

⎠

⎞

⎜

⎝

⎛+= 2

REF

OUT

Where VREF=0.8V (the internal reference voltage)

Rearranging the equation will give the following equation

to find the approximate resistor divider values:

⎟

⎠

⎞

⎜

⎝

⎛−= 1

REF

OUT

To maintain the stability of the internal reference voltage,

R2 needs to be kept smaller than 250kΩ.

No Load Stability

Other than external resistor divider, no minimum load is

required to keep the device stable. The device will remain

stable and regulated in no load condition.

ENABLE/SHUTDOWN Operation

The AP7167 is turned on by setting the EN pin high, and is

turned off by pulling it low. If this feature is not used, the

EN pin should be tied to IN pin to keep the regulator output

on at all time. To ensure proper operation, the signal

source used to drive the EN pin must be able to swing

above and below the specified turn-on/off voltage

thresholds listed in the Electrical Characteristics section

under VIL and VIH.

POWER-OK

The Power-Ok (POK) pin is an active high open-drain

output. It can be connected to any 5.5V or lower rail

through an external pull-up resistor. The recommended

sink current of POK pin is up to 4mA, so the pull-up

resistor for POK should be in the range of 10kΩ to 1MΩ. If

output voltage monitoring is not needed, the POK pin can

be left floating.

Current Limit Protection

When output current at OUT pin is higher than current limit

threshold, the current limit protection will be triggered and

clamp the output current to approximately 1.6A (1.2A min)

to prevent over-current and to protect the regulator from

damage due to overheating.

Short Circuit Protection

When OUT pin is short-circuited to GND or OUT pin

voltage is less than 200mV, short circuit protection will be

triggered and clamp the output current to approximately

750mA. This feature protects the regulator from over-

current and damage due to overheating.

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1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Application Notes (Continued)

Low Quiescent Current

The AP7167, consuming only around 150µA for all input

range and output loading, provides great power saving in

portable and low power applications.

Wide Output Range

The AP7167, with a wide output range of 0.8V to 5.0V,

provides a versatile solution for many portable and low

power applications.

Thermal Shutdown Protection

Thermal protection disables the output when the junction

temperature rises to approximately +155°C, allowing the

device to cool down. When the junction temperature

reduces to approximately +130°C the output circuitry is

enabled again. Depending on power dissipation, thermal

resistance, and ambient temperature, the thermal

protection circuit may cycle on and off. This cycling limits

the heat dissipation of the regulator, protecting it from

damage due to overheating.

Power Dissipation

The device power dissipation and proper sizing of the

thermal plane that is connected to the thermal pad is

critical to avoid thermal shutdown and ensuring reliable

operation. Power dissipation of the device depends on

input voltage and load conditions and can be calculated

by:

OUTOUTIND xI)VV(P

−

The AP7167 is available in the DFN3030-10 and SOP-8L-

EP packages, both with exposed pad, which is the primary

conduction path for heat to the printed circuit board (PCB).

The pad can be connected to ground or be left floating;

however, to ensure the device will not overheat, it should

be attached to an appropriate amount of copper PCB area.

However, the maximum power dissipation that can be

handled by the device depends on the maximum junction

to ambient thermal resistance, maximum ambient

temperature, and maximum device junction temperature,

which can be approximated by the equation below:

AD R

)TC150(

)T(max@P

−°

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AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Ordering Information

AP7167 - XX G - X

Packing

Package Green

FN : DFN3030-10

SP : SOP-8L-EP

G : Green 7/13 : Tape & Reel

Device Package

Code Packaging

(Note 6) 7”/13” Tape and Reel

Quantity Part Number Suffix

AP7167-FNG-7 FN DFN3030-10 3000/Tape & Reel -7

AP7167-SPG-13 SP SOP-8L-EP 2500/Tape & Reel -13

Notes: 6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Marking Information

(1) DFN3030-10

( Top View )

Y W X

XX : Identification Code

X : A~Z : Green

Y : Year : 0~9

W : Week : A~Z : 1~26 week;

a~z : 27~52 week; z represents

52 and 53 week

Part Number Package Identification Code

AP7167 DFN3030-10 B4

(2) SOP-8L-EP

( Top View )

AP7167

YY WW

Logo

Part No.

E WW : Week : 01~52; 52

YY : Year : 08, 09,10~

G : Green

X : Internal Code

represents 52 and 53 week

SOP-8L-EP

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Package Outline Dimensions (Continued)

(1) Package Type: DFN3030-10

Bottom View

Side View

0.10 C

0.08 C Seating Plane

2.9/3.1

2.3/2.5

2.9/3.1

0.50Typ.

1.5/1.7

(Pin #1 ID)

0.10 CAB

0.25 A

2X- 0.25 B

2X-

TOP MARK

0.50Typ.

Land Pattern Recommendation

(Unit:mm)

10x-0.30

0.600.15

0.15

1.80

2.60

0.25/0.55

R0.30

0.20/0.30

0.15

0/0.02

0.57/0.63

Top View

0.375Typ.

(2) Package Type: SOP-8L-EP

1.27typ 0.3/0.5

7°~9°

4.85/4.95

3.85/3.95

5.90/6.10

0.15/0.25

7°~9°

3.70/4.10

0.62/0.82

0/0.13

Gauge Plane

0.254

Seating Plane

0.35max.

45°

Detail "A"

1.30/1.50

1.75max.

Bottom View

2.4Ref.

3.3Ref.

Exposed pad

8x-0.60

Land Pattem Recommendation

(Unit:mm)

Exposed pad

5.4

8x-1.55

6x-1.27

Notes: 7. All dimensions are in millimeters. Angles are in degrees.

8. Coplanarity applies to the exposed heat sink slug as well as the terminals.

MSG IncoI-nlnvsn Top cover tape thickness Embossed Carrier

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1.2A LOW DROPOUT REGULATOR WITH POK

AP7167

Document number: DS31252 Rev. 7 - 2

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Taping Orientation (Note 9)

For DFN3030-10

Notes: 9.The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.

MSG Incol-nnAYEn

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1.2A LOW DROPOUT REGULATOR WITH POK

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IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS

DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other

changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability

arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any

license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described

herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies

whose products are represented on Diodes Incorporated website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized

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Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall

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Products described herein may be covered by one or more United States, international or foreign patents pending. Product names

and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without

the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided

in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected

to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or

systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements

concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,

notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,

Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes

Incorporated products in such safety-critical, life support devices or systems.

Datenblatt für AP7167 von Diodes Incorporated

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