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LP87322E/F Datasheet(PDF) 15 Page - Texas Instruments

Part # LP87322E/F
Description  Dual High-Current Buck Converter and Dual Linear Regulator
PDF  75 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP87322E/F Datasheet(HTML) 15 Page - Texas Instruments

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LP87322B-Q1, LP87322D-Q1, LP87322E-Q1, LP87322F-Q1
www.ti.com
SNVSAC5 – SEPTEMBER 2017
Product Folder Links: LP87322B-Q1 LP87322D-Q1 LP87322E-Q1 LP87322F-Q1
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
The LP87322B/D/E/F-Q1 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
automotive 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)
2000
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)
2000
LDO0
0.8 to 3.3
100
300
LDO1
0.8 to 3.3
100
300
The LP87322B/D/E/F-Q1 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 LP87322B/D/E/F-Q1 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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