LTC4411

1

4411fa

LTC4411

SCHOTTKY

DIODE

CONSTANT

CONSTANT

FORWARD VOLTAGE (V)

LTC4411 FO1b

SLOPE

SLOPE

IN

GND

CTL

OUT

STAT

LTC4411

WALL

ADAPTER

INPUT

TO

LOAD

4.7µF

STATUS OUTPUT

IS LOW WHEN WALL

ADAPTER IS SUPPLYING

LOAD CURRENT

BATTERY

CELL(S)

470k

4411 F01

TYPICAL APPLICATIO

APPLICATIO S

DESCRIPTIO

FEATURES

, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT and

PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

TM

OR’ing Diodes

■

Low Forward ON Resistance (140mΩ Max)

■

Internal Current Limit Protection

■

Pin-Compatible Monolithic Replacement

for the LTC4412

■

Low-Profile (1mm) 5-lead SOT-23 Package

2.6A Low Loss

Ideal Diode in ThinSOT

TM

The LTC

to 2.6A from an input voltage between 2.6V and 5.5V. The

LTC4411 is housed in a 5-lead 1mm profile SOT-23

package.

The LTC4411 contains a 140mΩ P-channel MOSFET con-

necting IN to OUT. During normal forward operation, the

drop across the MOSFET is regulated to as low as 28mV.

Quiescent current is less than 40µA for load currents up to

100mA. If the output voltage exceeds the input voltage, the

MOSFET is turned off and less than 1µA of reverse current

flows from OUT to IN. Maximum forward current is limited

to a constant 2.6A (typical) and internal thermal limiting cir-

cuits protect the part during fault conditions.

An open-drain STAT pin indicates conduction status. The

STAT pin can be used to drive an auxiliary P-channel

MOSFET power switch connecting an alternate power

source when the LTC4411 is not conducting forward

current.

An active-high control pin turns off the LTC4411 and

reduces current consumption to less than 25µA. When

shut off, the LTC4411 indicates this condition with a low

voltage on the status signal.

Figure 1. Automatic Switchover of Load

Between a Battery and a Wall Adapter

LTC4411 vs Schottky Diode

Forward Voltage Characteristics