1

RESET

2

VCC

3

GND

4

5

SRT

Not to scale

SOT-23 (5)

DBV (5)

Top View

VCC1

4

LP3470A

SNVSBF5C – JULY 2019 – REVISED MAY 2020

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6 Pin Configuration and Functions

DBV Package

5-Pin SOT-23

Top View

Pin Functions

PIN

I/O

DESCRIPTION

NO.

NAME

1

SRT

I

Set reset time-out. Connect a capacitor between this pin and ground to select the reset time-out period (tD).

tD = 619 × C1 (CSRT in µF and tD in ms). If no capacitor is connected, leave this pin floating.

2

GND

—

Ground pin.

3

VCC1

I

Can be connected to VCC or left floating. DO NOT CONNECT TO GND.

4

VCC

I

Supply voltage, and reset threshold monitor input.

5

RESET

O

Open-drain, active-low reset output. Connect to an external pullup resistor. RESET changes from high to low

whenever the monitored voltage (VCC) drops below the reset threshold voltage (VIT-). Once VCC exceeds

the reset threshold (VIT-) + hysteresis (VHYS), RESET remains low for the reset time-out period (tD) and then

deasserts to logic high.