MAX6470TA25BD3 datasheet(7/20 Pages) MAXIM

Part #	MAX6470TA25BD3

Description	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit

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Manufacturer	MAXIM [Maxim Integrated Products]

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300mA LDO Linear Regulators with Internal

Microprocessor Reset Circuit

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7

MAX6469/MAX6470/MAX6477/MAX6478 Pin Description

BUMP

MAX6469/MAX6470

MAX6477/MAX6478

SOT23

QFN

UCSP

NAME

FUNCTION

1

1, 2

A1

IN

Regulator Input. Bypass IN to GND with a 0.1µF capacitor.

2

3

A2

GND

Ground. This pin also functions as a heatsink. Solder to large pads or

the circuit-board ground plane to maximize thermal dissipation.

34

A3

SHDN

Active-Low Shutdown Input. Connect SHDN to VIN for normal

operation.

45

C3

RESET

Active-Low Reset Output. RESET remains low while VOUT is below the

reset threshold. RESET remains low for the duration of the reset timeout

period after the reset conditions are terminated. RESET is available in

open-drain and push-pull configurations.

5

6

C2

SET

Feedback Input for Externally Setting the Output Voltage. Connect SET

to GND to select the preset output voltage. Connect SET to an external

resistor-divider network for adjustable output operation.

6

7, 8

C1

OUT

Regulator Output. Bypass OUT to GND with a minimum 3.3µF low-ESR

capacitor.

MAX6471/MAX6472/MAX6479/MAX6480 Pin Description

BUMP

MAX6471/MAX6472

MAX6479/MAX6480

SOT23

QFN

UCSP

NAME

FUNCTION

1

1, 2

A1

IN

Regulator Input. Bypass IN to GND with a 0.1µF capacitor.

2

3

A2

GND

Ground. This pin also functions as a heatsink. Solder to large pads or

the circuit-board ground plane to maximize thermal dissipation.

34

A3

MR

Active-Low Manual Reset Input. The reset output is asserted while MR

is pulled low and remains asserted for the duration of the reset timeout

period after MR transitions from low to high. Leave MR unconnected or

connect to VOUT if not used. MR has an internal pullup resistor of 40k

Ω

(typ) to VOUT.

45

C3

RESET

Active-Low Reset Output. RESET remains low while VOUT is below the

reset threshold or while MR is held low. RESET remains low for the

duration of the reset timeout period after the reset conditions are

terminated. RESET is available in open-drain and push-pull

configurations.

5

6

C2

SET

Feedback Input for Externally Setting the Output Voltage. Connect SET

to GND to select the preset output voltage. Connect SET to an external

resistor-divider network for adjustable output operation.

6

7, 8

C1

OUT

Regulator Output. Bypass OUT to GND with a minimum 3.3µF low-ESR

capacitor.

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