TPS3898PDRYR datasheet(6/21 Pages) TI1

Part #	TPS3898PDRYR

Description	Single-Channel, Adjustable Supervisory Circuit in Ultra-Small Package

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Manufacturer	TI1 [Texas Instruments]

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ENABLE

GND

SENSE

VCC

CT

SENSE_OUT

1

2

3

6

5

4

ENABLE

GND

SENSE

VCC

CT

SENSE_OUT

1

2

3

6

5

4

TPS3895, TPS3896

TPS3897, TPS3898

SBVS172A

– JULY 2011 – REVISED SEPTEMBER 2011

www.ti.com

PIN CONFIGURATIONS

DRY PACKAGE: TPS3895, TPS3897

DRY PACKAGE: TPS3896, TPS3898

USON-6

(TOP VIEW)

PIN ASSIGNMENTS

TPS3895/

TPS3896/

PIN NAME

TPS3897

TPS3898

DESCRIPTION

Capacitor-adjustable delay. The CT pin offers a user-adjustable delay time. Connecting this

pin to a ground referenced capacitor sets the delay time for SENSE rising above 0.5 V to

CT

5

SENSE_OUT asserting (or ENABLE asserting to SENSE_OUT asserting for A version

devices).

tpd(r) (s) = (CCT (µF) × 4) + 40 µs

Active high input. Driving ENABLE low immediately makes SENSE_OUT go low,

independent of V(SENSE). With V(SENSE) already above VIT+, drive ENABLE high to make

ENABLE

1

—

SENSE_OUT go high after the capacitor-adjustable delay time (A version) or 0.2

µs (P

version).

Active low input. Driving ENABLE high immediately makes SENSE_OUT go high,

independent of V(SENSE). With V(SENSE) already above VIT+, drive ENABLE low to make

ENABLE

—

1

SENSE_OUT go low after the capacitor-adjustable delay time (A version) or 0.2

µs (P

version).

GND

2

Ground

This pin is connected to the voltage that is monitored with the use of external resistor. The

output asserts after the capacitor-adjustable delay time when V(SENSE) rises above 0.5 V and

SENSE

3

ENABLE is asserted. The output de-asserts after a minimal propagation delay (16

µs) when

V(SENSE) falls below VIT+ – Vhys.

SENSE_OUT is an open-drain/push-pull output that is immediately driven low after V(SENSE)

falls below VIT+ – Vhys or the ENABLE input is low. SENSE_OUT goes high after the

SENSE_OUT

4

—

capacitor-adjustable delay time when V(SENSE) is greater than VIT+ and the ENABLE pin is

high. Open-drain devices(TPS3897/8) can be pulled up to 18 V independent of VCC; pull-up

resistors are required for these devices.

SENSE_OUT is an open-drain/push-pull output that is immediately driven high after V(SENSE)

falls below VIT+ – Vhys or the ENABLE input is high. SENSE_OUT goes low after the

SENSE_OUT

—

4

capacitor-adjustable delay time when V(SENSE) is greater than VIT+ and the ENABLE pin is

low. Open-drain devices(TPS3897/8) can be pulled up to 18 V independent of VCC; pull-up

resistors are required for these devices.

Supply voltage input. Connect a 1.7-V to 6.5-V supply to VCC to power the device. It is good

VCC

6

analog design practice to place a 0.1-

µF ceramic capacitor close to this pin.

6

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Product Folder Link(s): TPS3895 TPS3896 TPS3897 TPS3898

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