Datenblatt für Micropower Hot Swap Controller Guide von Analog Devices Inc.

Micropower Hot Swap Controller 2.7V __ —4ov T0 ;_ REVERSE 7 STATUS 36v ' PROTECTION L LTC4231 ON/OFF —< 4paiqhotswap="" conuoher="" iq="" vs="" input="" v0‘tage="" ltl'hedb="" vout="">
The LTC4231 Hot Swap™ controller delivers a micropower solution for safe insertion and removal of boards and batteries in
energy conscious applications. Device I
Q
(quiescent current) is a mere 4µA while a strobed ground reduces the input voltage
divider current by 50x. The system is completely protected against battery deep discharge, output overload or short-circuit,
overvoltage and reverse battery connection. Placing the LTC4231 in shutdown mode reduces its I
Q
to 0.3µA and turns off the
external N-channel power MOSFETs to disconnect downstream circuits, extending battery standby time.
Features
n
Enables Safe Board or Battery Insertion and Removal
n
Low 4μA Quiescent Current, 0.3μA in Shutdown
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2.7V to 36V Operating Range
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Reverse Battery Protection to –40V
n
Overcurrent Protection
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Two Level: Circuit Breaker with Higher Current Limit
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Adjustable Circuit Breaker Delay
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1µs (max) Fast Current Limit Response
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Automatic Retry or Latchoff After Current Fault
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Overvoltage and Undervoltage Protection
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Adjustable Undervoltage Hysteresis
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Divider Strobed Ground for Reduced Current
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Controls Single or Back-to-Back N-Channel MOSFETs
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MOSFET On Status Output
n
12-Pin MSOP and 3mm × 3mm QFN Packages
IQ vs Input Voltage
4µA IQ Hot Swap Controller
Protects Battery Against Voltage and Current Faults
Micropower Hot Swap Controller
VIN (V)
0
0
IQ (µA)
3
4
1
2
5
10 20 30 40
NORMAL ON
SHUTDOWN
L, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks and Hot Swap and ThinSOT are trademarks
of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
LTCZESS ifi L7 LTUHEI‘B
n
850nA Quiescent Current
n
2.5V to 36V Operating Range
n
±1.5% (Max) Threshold Accuracy
n
Adjustable Reset Threshold
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Manual Reset Input
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−40°C to 125°C Operation
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8-Pin TSOT-23 and 2mm x 2mm DFN Packages
n
Low Loss Replacement for Power Schottky Diode
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150μA Quiescent Current, 9μA in Shutdown
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4V to 80V Operating Range
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On/Off Control of Forward Path
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Reverse Input Protection to –40V
n
–40°C to 125°C Operation
n
8-Pin MSOP and 6-Pin 2mm x 3mm DFN Packages
LTC2960 Nano-Current Two Input Voltage Supervisor for Reset Generation
LTC4359 Ideal Diode Controller for Lossless Solar Panel Isolation
LTC4231
CIRCUIT
TO LTC4231 SHDN
FROM LTC4231 STATUS
INT
EN
KILL
TIMER
ON
VIN
PB
GND
LTC2955-1
BATTERY
POWERED
SYSTEM
LTC4231
CIRCUIT
VCC
IN+/IN–
GND
ADJ
MR
DC/DC
RESET
LOW BAT
LTC2960
SOLAR
PANEL
SHUNT
REGULATOR
LTC4359
VSS
SHDN
IN
SOURCE
OUT
GATE
Micropower Devices for Building Battery Powered Systems
Other Battery Friendly Devices
Device VIN
(V)
VIN,REV
(V)
IQ
(µA)
ISHDN
(µA)
Function Package
(mm × mm)
LTC4361 2.5 to 5.5 PFET 230 1.5 Overcurrent and 80V Overvoltage Protection TSOT23-8, 2 x 2 DFN-8
LTC4364 4 to 80 −40 483 10 Surge Stopper/Hot Swap with Ideal Diode MSOP-16, SO-16, 4 x 3 DFN-14
LTC4365 2.5 to 34 −40 125 10 OV, UV and Reverse Input Protection TSOT23-8, 3 x 2 DFN-8
LTC4417 2.5 to 36 −42 28 15 Prioritized Supply Selection from Three Inputs SSOP-24, 4 x 4 QFN-24
LTC2955 Pushbutton On/Off Controller with Automatic Turn-On
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Automatic Turn-On with Voltage Monitor Input
n
1.2μA Quiescent Current
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1.5V to 36V Operating Range
n
PB Input: ±36V Range, ±25kV ESD HBM
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Simple Interface Allows Graceful μP Shutdown
n
Adjustable Turn-Off Timer
n
10-Pin 3mm × 2mm DFN and 8-Pin ThinSOT™ Packages
0714
www.linear.com/4231 n 1-800-4-LINEAR