Converter. LM5160-Q1 Datasheet

LM5160-Q1 Datasheet PDF


Part

LM5160-Q1

Description

Wide Input 65-V 2-A Synchronous Buck / Fly-Buck DC/DC Converter

Manufacture

etcTI

Page 30 Pages
Datasheet
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LM5160-Q1 Datasheet
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LM5160-Q1
SNVSAE4C – JULY 2015 – REVISED OCTOBER 2018
LM5160-Q1 Wide Input 65-V, 2-A Synchronous Buck / Fly-Buck™ DC/DC Converter
1 Features
1 AEC-Q100 Qualified for Automotive Applications
– Temperature Grade 1: –40°C TA 125°C
– HBM ESD Classification Level 2
– CDM ESD Classification Level C5
• Wide 4.5-V to 65-V Input Voltage Range
• Integrated High-Side and Low-Side Switches
– No External Schottky Diode Required
• 2-A Maximum Load Current
• Meets CISPR 25 EMI Standard
• Adaptive Constant On-Time Control
– No External Loop Compensation
– Fast Transient Response
• Selectable Forced PWM or DCM Operation
– FPWM Supports Multi-Output Fly-Buck™
• Nearly Constant Switching Frequency
– Resistor Adjustable up to 1 MHz
• Programmable Soft-Start Time
• Prebiased Start-Up
• ±1% Feedback Voltage Reference
• Inherent Protection Features for Robust Design
– Peak Current Limiting Protection
– Adjustable Input UVLO and Hysteresis
– VCC and Gate Drive UVLO Protection
– Thermal Shutdown Protection With Hysteresis
• 14-Pin HTSSOP Package, 0.65-mm Pitch
• Create a Custom Design Using the LM5160-Q1
With the WEBENCH® Power Designer
Typical Synchronous Buck Application Circuit
VIN
VIN BST
LM5160-Q1
SW
VOUT
RON
EN/UVLO
FB
VCC
SS FPWM
AGND PGND
2 Applications
• Automotive DC/DC Converter
• IGBT Gate Drive Bias Supply
• Low-Power Isolated DC/DC (Fly-Buck)
3 Description
The LM5160-Q1 is a 65-V, 2-A synchronous step-
down converter with integrated high-side and low-side
MOSFETs. The adaptive constant on-time control
scheme requires no loop compensation and supports
high step-down ratios with fast transient response. An
internal feedback amplifier maintains ±1% output
voltage regulation over the entire operating
temperature range. The on-time varies inversely with
input voltage resulting in nearly constant switching
frequency.
Peak and valley current limit circuits protect against
overload conditions. The undervoltage lockout
(EN/UVLO) circuit provides independently adjustable
input undervoltage threshold and hysteresis. The
LM5160-Q1 is programmed through the FPWM pin to
operate in continuous conduction mode (CCM) from
no load to full load or to automatically switch to
discontinuous conduction mode (DCM) at light load
for higher efficiency. Forced CCM operation supports
multiple-output and isolated Fly-Buck applications
using a coupled inductor.
The LM5160-Q1 is qualified to automotive AEC-Q100
grade 1 and is available in 14-pin HTSSOP package
with 0.65-mm pin pitch.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM5160-Q1
HTSSOP (14)
4.40 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Fly-Buck Application Circuit
VIN
VIN
BST
VOUT(SEC)
LM5160-Q1
RON
SW
VOUT(PRI)
EN/UVLO
FB
VCC
SS FPWM
AGND PGND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM5160-Q1 Datasheet
LM5160-Q1
SNVSAE4C – JULY 2015 – REVISED OCTOBER 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Switching Characteristics .......................................... 6
6.7 Typical Characteristics ............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................ 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description ................................................ 11
7.4 Device Functional Modes ....................................... 14
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Applications ................................................ 16
8.3 Do's and Don'ts ...................................................... 24
9 Power Supply Recommendations...................... 25
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................ 26
10.2 Layout Example ................................................... 26
11 Device and Documentation Support ................. 27
11.1 Device Support...................................................... 27
11.2 Documentation Support ........................................ 27
11.3 Receiving Notification of Documentation Updates 28
11.4 Community Resources.......................................... 28
11.5 Trademarks ........................................................... 28
11.6 Electrostatic Discharge Caution ............................ 28
11.7 Glossary ................................................................ 29
12 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (November 2017) to Revision C
Page
• Changed Features ................................................................................................................................................................. 1
• Changed front page schematics............................................................................................................................................. 1
• Changed Pinout Drawing........................................................................................................................................................ 3
• Changed ESD Ratings ........................................................................................................................................................... 4
• Changed Function Block Diagram........................................................................................................................................ 10
• Changed Power Supply Recommendations......................................................................................................................... 25
• Changed Related Documentation ....................................................................................................................................... 27
Changes from Revision A (November 2015) to Revision B
Page
• Updated AEC-Q100 qualified bullet points ............................................................................................................................. 1
• Deleted the lead temperature from the Absolute Maximum Ratings table ............................................................................ 4
• Moved the Ripple Configuration section to the Application Information section .................................................................. 15
• Changed the Application Performance Plots title to Application Curves in both typical application sections ...................... 20
• Added layout details with LM5160-Q1 HTSSOP-14 package ............................................................................................. 26
• Changed the Electrostatic Discharge Caution statement..................................................................................................... 28
Changes from Original (July 2015) to Revision A
Page
• Changed current limit off-timer in the Electrical Characteristics to 16.................................................................................... 5
2 Submit Documentation Feedback
Product Folder Links: LM5160-Q1
Copyright © 2015–2018, Texas Instruments Incorporated


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity Reference Design LM5160-Q1 SNV SAE4C – JULY 2015 – REVISED OCTOBER 2018 LM5160-Q1 Wide Input 65-V, 2-A Sy nchronous Buck / Fly-Buck™ DC/DC Conv erter 1 Features •1 AEC-Q100 Qualifi ed for Automotive Applications – Temp erature Grade 1: –40°C ≤ TA ≤ 12 5°C – HBM ESD Classification Level 2 – CDM ESD Classification Level C5 Wide 4.5-V to 65-V Input Voltage Rang e • Integrated High-Side and Low-Side Switches – No External Schottky Diod e Required • 2-A Maximum Load Current • Meets CISPR 25 EMI Standard • Ad aptive Constant On-Time Control – No External Loop Compensation – Fast Tra nsient Response • Selectable Forced P WM or DCM Operation – FPWM Supports M ulti-Output Fly-Buck™ • Nearly Cons tant Switching Frequency – Resistor A djustable up to 1 MHz • Programmable Soft-Start Time • Prebiased Start-Up • ±1% Feedback Voltage Reference • Inherent Protection Features for Robust Design – Peak Current Limiting Protectio.
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