LP87332D datasheet(14/74 Pages) TI1

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LP87332D

SNVSAU6 – NOVEMBER 2017

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7 Detailed Description

7.1 Overview

The LP87332D is a high-efficiency, high-performance flexible power supply device with two step-down DC-DC

converter cores (Buck0 and Buck1) and two low-dropout (LDO) linear regulators (LDO0 and LDO1) for industrial

applications. Table 1 lists the output characteristics of the regulators.

Table 1. Supply Specification

SUPPLY

OUTPUT

VOUT RANGE (V)

RESOLUTION (mV)

IMAX MAXIMUM OUTPUT CURRENT (mA)

Buck0

0.7 to 3.36

10 (0.7 V to 0.73 V)

5 (0.73 V to 1.4 V)

20 (1.4 V to 3.36 V)

3000

Buck1

0.7 to 3.36

10 (0.7 V to 0.73 V)

5 (0.73 V to 1.4 V)

20 (1.4 V to 3.36 V)

3000

LDO0

0.8 to 3.3

100

300

LDO1

0.8 to 3.3

100

300

The LP87332D also supports switching clock synchronization to an external clock (CLKIN pin). The nominal

frequency of the external clock can be from 1 MHz to 24 MHz with 1-MHz steps.

Additional features include:

•

Soft-start

•

Input voltage protection:

–

Undervoltage lockout

–

Overvoltage protection

•

Output voltage monitoring and protection:

–

Overvoltage monitoring

–

Undervoltage monitoring

–

Overload protection

•

Thermal warning

•

Thermal shutdown

The LP87332D has one dedicated general purpose digital output (GPO) signal. CLKIN pin can be programmed

as a second GPO signal (GPO2) if external clock is not needed. The output type (open-drain or push-pull) is

programmable for the GPOs.

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