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LP8728B-Q1

Texas Instruments
Part Number LP8728B-Q1
Manufacturer Texas Instruments
Description Quad-Output Step-Down DC-DC Converter
Published Sep 14, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LP8728B-Q1 SNVSA70 – FEBRUARY ...
Datasheet PDF File LP8728B-Q1 PDF File

LP8728B-Q1
LP8728B-Q1

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LP8728B-Q1 SNVSA70 – FEBRUARY 2015 LP8728B-Q1 Quad-Output Step-Down DC-DC Converter 1 Features •1 LP8728B-Q1 is an Automotive Grade Product that is AECQ-100 Grade 1 Qualified • Four High Efficiency Step-Down DC-DC Converters: – 93% Peak Efficiency (VIN = 5 V, VOUT = 3.
3 V) – Max Output Current 1 A – Forced PWM Operation – Soft-Start Control – VOUT1 = 3.
3 V – VOUT2 = 1.
2 V – VOUT3 = 1.
8 V or 2.
65 V (pin selectable) – VOUT4 = 1.
5 V • Separate Enable Inputs for each Converter Control • Separate Power Good Outputs for each Converter • Output Overcurrent and Input Overvoltage Protection • Overtemperature Protection • Undervoltage Lockout (UVLO) 2 Applications • FPGA, DSP Core Power • Processor Power for Mobile Devices • Peripheral I/O Power • Automotive Safety Cameras • Automotive Infotainment Micro Controller Simplified Schematic VIN 1 µF 1 µF VDDIO AVDD BYP PG_B1 PG_B2 PG_B3 PG_B4 EN_B1 EN_B2 EN_B3 EN_B4 DEFSEL LP8728 VIN_B1 SW_B1 FB_B1 1.
5 µH VIN_B2 SW_B2 FB_B2 1.
5 µH VIN_B3 SW_B3 FB_B3 1.
5 µH VIN_B4 SW_B4 FB_B4 1.
5 µH VIN 10 µF VOUT1 10 µF VIN 10 µF VOUT2 10 µF VIN 10 µF VOUT3 10 µF VIN 10 µF VOUT4 10 µF AGND GND_B1 GND_B2 GND_B3 GND_B4 EFFICIENCY (%) 3 Description The LP8728B-Q1 is a quad-output Power Management Unit (PMU), optimized for low-power FPGAs, microprocessors, and DSPs for automotive applications.
This device integrates four highly efficient step-down DC-DC converters into one package.
Each converter has high current capability and separate controls which allows flexibility to use the device in multiple applications.
All the converters operate above the AM band with a fixed 3.
2-MHz switching frequency.
The high-side switch turn-on time of each converter is phase shifted to minimize input current spikes.
Protection features include output short-circuit protection, switch current limits, input overvoltage protection, input undervoltage lockout, an...


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