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LM51231-Q1 2.2-MHz Wide VIN Synchronous Boost Controller with VOUT Tracking
SLVSGN5
October 2022
LM51231-Q1
PRODUCTION DATA
CONTENTS
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LM51231-Q1 2.2-MHz Wide VIN Synchronous Boost Controller with VOUT Tracking
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Device Enable/Disable (EN, VH Pin)
7.3.2
High Voltage VCC Regulator (BIAS, VCC Pin)
7.3.3
Light Load Switching Mode Selection (MODE Pin)
7.3.4
VOUT Range Selection (RANGE Pin)
7.3.5
Line Undervoltage Lockout (UVLO Pin)
7.3.6
Fast Restart using VCC HOLD (VH Pin)
7.3.7
Adjustable Output Regulation Target (VOUT, TRK, VREF Pin)
7.3.8
Overvoltage Protection (VOUT Pin)
7.3.9
Power Good Indicator (PGOOD Pin)
7.3.10
Dynamically Programmable Switching Frequency (RT)
7.3.11
External Clock Synchronization (SYNC Pin)
7.3.12
Programmable Spread Spectrum (DITHER Pin)
7.3.13
Programmable Soft-start (SS Pin)
7.3.14
Wide Bandwidth Transconductance Error Amplifier and PWM (TRK, COMP Pin)
7.3.15
Current Sensing and Slope Compensation (CSP, CSN Pin)
7.3.16
Constant Peak Current Limit (CSP, CSN Pin)
7.3.17
Maximum Duty Cycle and Minimum Controllable On-time Limits
7.3.18
MOSFET Drivers, Integrated Boot Diode, and Hiccup Mode Fault Protection (LO, HO, HB Pin)
7.3.19
Thermal Shutdown Protection
7.4
Device Functional Modes
7.4.1
Device Status
7.4.1.1
Shutdown Mode
7.4.1.2
Configuration Mode
7.4.1.3
Active Mode
7.4.1.4
Bypass Mode
7.4.1.4.1
Bypass DE mode
7.4.1.4.2
Bypass FPWM
7.4.2
Light Load Switching Mode
7.4.2.1
Forced PWM (FPWM) Mode
7.4.2.2
Diode Emulation (DE) Mode
7.4.2.3
Forced Diode Emulation Operation in FPWM Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.3
Application Ideas
8.2.4
Application Curves
8.3
System Example
8.4
Power Supply Recommendations
8.5
Layout
8.5.1
Layout Guidelines
8.5.2
Layout Example
9
Device and Documentation Support
9.1
Receiving Notification of Documentation Updates
9.2
Support Resources
9.3
Trademarks
9.4
Electrostatic Discharge Caution
9.5
Glossary
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGR|20
MPQF239A
Thermal pad, mechanical data (Package|Pins)
RGR|20
QFND664
Orderable Information
slvsgn5_oa
slvsgn5_pm
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