LM5176 controller Datasheet

LM5176 Datasheet PDF, Equivalent


Part Number

LM5176

Description

synchronous 4-switch buck-boost controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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LM5176
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LM5176
SNVSAI1A – JUNE 2017 – REVISED MARCH 2019
LM5176 55-V Wide VIN synchronous 4-switch buck-boost controller
1 Features
1 Single inductor buck-boost controller for step-
up/step-down DC/DC conversion
• Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V
maximum)
• Flexible VOUT: 0.8 V to 55 V
• VOUT short protection
• High efficiency buck-boost transition
• Adjustable switching frequency
• Optional frequency sync and dithering
• Integrated 2-A MOSFET gate drivers
• Cycle-by-cycle current limit and optional hiccup
• Optional input or output average current limiting
• Programmable input UVLO and soft start
• Power Good and output overvoltage protection
• Available in HTSSOP-28 and QFN-28 packages
• Create a custom design using the LM5176 with
the WEBENCH Power Designer
3 Description
The LM5176 is a synchronous four-switch buck-boost
DC/DC controller capable of regulating the output
voltage at, above, or below the input voltage. The
LM5176 operates over a wide input voltage range of
4.2 V to 55 V (60-V absolute maximum) to support a
variety of applications.
The LM5176 uses current-mode control both in buck
and boost modes of operation for superior load and
line regulation. The switching frequency is
programmed by an external resistor and can be
synchronized to an external clock signal.
The device also features a programmable soft-start
function and offers protection features including
cycle-by-cycle current limiting, input undervoltage
lockout (UVLO), output overvoltage protection (OVP),
and thermal shutdown. In addition, the LM5176
features optional average input or output current
limiting, optional spread spectrum to reduce peak
EMI, and optional hiccup mode protection in
sustained overload conditions.
2 Applications
• Industrial PC power supplies
• USB power delivery
• Battery-powered systems
• LED lighting
PART NUMBER
LM5176
Device Information
PACKAGE
BODY SIZE
HTSSOP (28)
9.70 mm × 4.40 mm
QFN (28)
5.00 mm × 4.00 mm
Simplified Schematic
VIN
Enable
Power Good
EN/UVLO
PGOOD
SS
SLOPE
RT/SYNC
COMP
AGND
PGND
VCC
LM5176
BOOT1
HDRV1
SW1
LDRV1
CS
CSG
LDRV2
SW2
BOOT2
HDRV2
VOSNS
VCC
VCC
VOUT
Copyright © 2016, Texas Instruments Incorporated
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.

LM5176
LM5176
SNVSAI1A – JUNE 2017 – REVISED MARCH 2019
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......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics .............................................. 9
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 19
8 Application and Implementation ........................ 20
8.1 Application Information............................................ 20
8.2 Typical Application .................................................. 20
9 Power Supply Recommendations...................... 27
10 Layout................................................................... 27
10.1 Layout Guidelines ................................................. 27
10.2 Layout Example .................................................... 28
11 Device and Documentation Support ................. 29
11.1 Device Support .................................................... 29
11.2 Documentation Support ........................................ 29
11.3 Receiving Notification of Documentation Updates 29
11.4 Community Resources.......................................... 29
11.5 Trademarks ........................................................... 29
11.6 Electrostatic Discharge Caution ............................ 29
11.7 Glossary ................................................................ 30
12 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (June 2017) to Revision A
Page
• Added content regarding QFN package and top navigator icon for TI reference design....................................................... 1
2 Submit Documentation Feedback
Product Folder Links: LM5176
Copyright © 2017–2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity Reference Design LM5176 SNVSAI 1A – JUNE 2017 – REVISED MARCH 2019 LM5176 55-V Wide VIN synchronous 4-sw itch buck-boost controller 1 Features •1 Single inductor buck-boost control ler for stepup/step-down DC/DC conversi on • Wide VIN: 4.2 V (2.5 V with bias ) to 55 V (60 V maximum) • Flexible V OUT: 0.8 V to 55 V • VOUT short prote ction • High efficiency buck-boost tr ansition • Adjustable switching frequ ency • Optional frequency sync and di thering • Integrated 2-A MOSFET gate drivers • Cycle-by-cycle current limi t and optional hiccup • Optional inpu t or output average current limiting Programmable input UVLO and soft star t • Power Good and output overvoltage protection • Available in HTSSOP-28 and QFN-28 packages • Create a custom design using the LM5176 with the WEBEN CH Power Designer 3 Description The LM 5176 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output .
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