Texas Instruments LM5164-Q1 EVM, Руководство пользователя

Страница: 5 / 24

V
OUT
= 12 V
SW
BST
PGOOD
VIN
EN/UVLO
GND
RON
FB
LM5164-Q1
C
OUT
47
P
F
C
IN
2.2 P F
V
IN
= 15 V...100 V I
OUT
= 1 A
L
O
68 P H
Copyright © 2018, Texas Instruments Incorporated
C
BST
2.2 nF
R
FB1
453 k
:
R
FB2
49.9 k :
R
RON
100 k
:
R
A
453 k :
C
A
3.3 nF
C
B
56 pF
U
1
VIN
SW
EN/UVLO
BST
GND
RON FB
PGOOD
EP
www.ti.com
Overview
5 SNVU620A – September 2018 – Revised April 2019
Submit Documentation Feedback
Copyright © 2018–2019, Texas Instruments Incorporated
LM5164-Q1 EVM User Guide
2 Overview
2.1 LM5164-Q1 Synchronous Buck Converter
The LM5164-Q1 step-down switching converter features all the functions needed to implement a low-cost,
high-efficiency buck regulator capable of supplying 1 A to the load. An adaptive constant on-time (COT)
control scheme and diode emulation mode at light loads enable a no-load supply current as low as 24
μ
A
at 48-V input. With integrated 100-V power MOSFETs, synchronous rectification achieves high conversion
efficiency over a wide load current range. Various features incorporated for enhanced reliability and safety
include cycle-by-cycle peak current limit, thermal shutdown protection, internal output voltage soft-start
timer, 1.5-V precision enable threshold, and an open-drain PGOOD indicator for sequencing and fault
reporting.
Figure 1 shows the pin configuration of the LM5164-Q1. Figure 2 presents the regulator schematic for
quick reference.
Figure 1. LM5164-Q1 Pin Configuration (8-Pin SO Package with PowerPAD, Top View)
Figure 2. LM5164-Q1 Buck Regulator Simplified Schematic
2.2 Typical Applications
• Automotive 48-V Mild Hybrid ECU Bias Supplies
• Automotive DC/DC Converter, PTC Heater, HVAC Compressors
• High Cell Count Battery Packs for E-Bikes, E-Scooters and Drones
• General-Purpose Bias Supplies
• Automotive and Industrial Battery-Powered Equipment