OUT

IN

OUT

V

V

0.04

I

=

-

´

LIM

1.02912

LIM

205.62

R

I

=

LIM

0.976944

LIM

197.388

R

I

=

(

)

OUT

CHARGE

EXT

INT

dV

I

C

C

dt

=

+

TPS25910

www.ti.com

SLUSAR6B – SEPTEMBER 2012 – REVISED MARCH 2013

PIN DESCRIPTION

FLT: Open-drain output that pulls low during thermal shutdown. FLT activates when device thermally shuts down

and deactivates when die temperature cools down below the device thermal protection threshold and the device

GND: This is the most negative voltage in the circuit and is used as reference for all voltage measurements

unless otherwise specified. All the GND pins must be connected to system power supply negative return point

GATE: Output that provides gate drive for the internal pass FET. Its sourcing current is about 11 µA. An internal

The GATE pin is disabled by the following mechanisms:

1. When EN is above its rising threshold, GATE is pulled down by a 40-

Ω resistor connecting to GND for

approximately 50 µs. Then, a 7.5-k

Ω resistor ties GATE to GND to ensure the GATE is off.

approximately 50 µs. Then, a 7.5-k

Ω resistor ties GATE to GND to ensure the GATE is off.

3. When short circuit fault occurs, GATE is pulled down by a 40-

Ω resistor connecting to GND for approximately

50 µs. Then, a 500 µA current source continues to pull down on the GATE.

4. If the chip die temperature exceeds the OTSD rising threshold, GATE is pulled down to GND by a 7.5-k

Ω

resistor.

An external capacitor can be connected from GATE pin to GND pin to create linear inrush profile. The slew rate

of the inrush can be controlled by a different capacitor value.

(1)

Where:

.

(2)

(3)

EN: When this pin is pulled low, the device is enabled. The input threshold is hysteretic, allowing the user to

program a startup delay with an external RC circuit. EN is pulled to VIN by a 10-M

Ω resistor, pulled to GND by

16.8 M

Ω and is clamped to ground by a 7-V Zener diode. Because high impedance pullup and or down resistors

are used to reduce current draw, any external FET controlling this pin should be low leakage.

IN: Input voltage to the TPS25910. The recommended operating voltage range is 3 V to 20 V. All VIN pins

should be connected together and to the power source.

OUT: Output connection for the TPS25910. When switched on, the output voltage is approximately:

(4)

All OUT pins should be connected together and to the load.

Copyright © 2012–2013, Texas Instruments Incorporated

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Product Folder Links: TPS25910