LM5175-Q1 Controller Datasheet

LM5175-Q1 Datasheet PDF, Equivalent


Part Number

LM5175-Q1

Description

Synchronous 4-Switch Buck-Boost Controller

Manufacture

etcTI

Total Page 30 Pages
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LM5175-Q1
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LM5175-Q1
SNVSAD9 – APRIL 2016
LM5175-Q1 42 V Wide VIN Synchronous 4-Switch Buck-Boost Controller
1 Features
1 Qualified for Automotive Applications
• AEC-Q100 Qualified with the following results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• Single Inductor Buck-Boost Controller for Step-
Up/Step-Down DC/DC Conversion
• Wide VIN Range: 3.5 V to 42 V, 60 V Maximum
• Flexible VOUT Range: 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
• Selectable CCM or DCM with Pulse Skipping
• HTSSOP-28 Package
2 Applications
3 Description
The LM5175-Q1 is a synchronous four-switch buck-
boost DC/DC controller capable of regulating the
output voltage at, above, or below the input voltage.
The LM5175-Q1 operates over a wide input voltage
range of 3.5 V to 42 V (60 V maximum) to support a
variety of applications.
The LM5175-Q1 employs 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 LM5175-Q1
features selectable Continuous Conduction Mode
(CCM) or Discontinuous Conduction Mode (DCM)
operation, optional average input or output current
limiting, optional spread spectrum to reduce peak
EMI, and optional hiccup mode protection in
sustained overload conditions.
Device Information(1)
ORDER NUMBER
PACKAGE
BODY SIZE
LM5175-Q1
HTSSOP-28
9.7 mm x 4.4 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
• Automotive Start-Stop Systems
• Backup Battery and Supercapacitor Charging
• Industrial PC Power Supplies
• USB Power Delivery
• LED Lighting
4 Simplified Schematic
VIN
Enable
Power Good
EN/UVLO
PGOOD
SS
SLOPE
RT/SYNC
LM5175-Q1
COMP
AGND
PGND
VCC
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.

LM5175-Q1
LM5175-Q1
SNVSAD9 – APRIL 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 13
8.3 Feature Description................................................. 14
8.4 Device Functional Modes........................................ 19
9 Application and Implementation ........................ 20
9.1 Application Information............................................ 20
9.2 Typical Application .................................................. 20
10 Power Supply Recommendations ..................... 27
11 Layout................................................................... 27
11.1 Layout Guidelines ................................................. 27
11.2 Layout Example .................................................... 28
12 Device and Documentation Support ................. 29
12.1 Documentation Support ........................................ 29
12.2 Community Resources.......................................... 29
12.3 Trademarks ........................................................... 29
12.4 Electrostatic Discharge Caution ............................ 29
12.5 Glossary ................................................................ 29
13 Mechanical, Packaging, and Orderable
Information ........................................................... 29
13.1 Package Option Addendum .................................. 30
5 Revision History
DATE
April 2016
REVISION
*
NOTES
Initial Release
2 Submit Documentation Feedback
Product Folder Links: LM5175-Q1
Copyright © 2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5175-Q1 SNVSAD9 – APRIL 2016 LM5175-Q1 42 V Wide VIN Synchronou s 4-Switch Buck-Boost Controller 1 Fea tures •1 Qualified for Automotive App lications • AEC-Q100 Qualified with t he following results: – Device Temper ature Grade 1: –40°C to +125°C Ambi ent Operating Temperature Range – Dev ice HBM ESD Classification Level 2 – Device CDM ESD Classification Level C4B • Single Inductor Buck-Boost Control ler for StepUp/Step-Down DC/DC Conversi on • Wide VIN Range: 3.5 V to 42 V, 6 0 V Maximum • Flexible VOUT Range: 0. 8 V to 55 V • VOUT Short Protection High Efficiency Buck-Boost Transitio n • Adjustable Switching Frequency Optional Frequency Sync and Dithering • Integrated 2-A MOSFET Gate Drivers • Cycle-by-Cycle Current Limit and O ptional Hiccup • Optional Input or Ou tput Average Current Limiting • Progr ammable Input UVLO and Soft-Start • Power Good and Output Overvoltage Protection • Selectable CCM or .
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