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LM25190 42V, Synchronous, Buck Controller With Constant-Current and Constant-Voltage Regulation
SNVSCS2
December 2024
LM25190
PRODUCTION DATA
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LM25190 42V, Synchronous, Buck Controller With Constant-Current and Constant-Voltage Regulation
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Input Voltage Range (VIN)
6.3.2
High-Voltage Bias Supply Regulator (VCC, BIAS)
6.3.3
Precision Enable (EN)
6.3.4
Power-Good Monitor (PGOOD)
6.3.5
Switching Frequency (RT)
6.3.6
Low Dropout Mode
6.3.7
Dual Random Spread Spectrum (DRSS)
6.3.8
Soft Start
6.3.9
Output Voltage Setpoint (FB)
6.3.10
Minimum Controllable On Time
6.3.11
Inductor Current Sense (ISNS+, VOUT)
6.3.12
Voltage Loop Error Amplifier
6.3.13
Current Monitor, Programmable Current Limit, and Current Loop Error Amplifier (IMON/ILIM, ISET)
6.3.14
Dual Loop Architecture
6.3.15
PWM Comparator
6.3.16
Slope Compensation
6.3.17
Hiccup Mode Current Limiting
6.3.18
High-Side and Low-Side Gate Drivers (HO, LO)
6.4
Device Functional Modes
6.4.1
Sleep Mode
6.4.2
Forced PWM Mode and Synchronization (FPWM/SYNC)
6.4.3
Thermal Shutdown
7
Application and Implementation
7.1
Application Information
7.1.1
Power Train Components
7.1.1.1
Buck Inductor
7.1.1.2
Output Capacitors
7.1.1.3
Input Capacitors
7.1.1.4
Power MOSFETs
7.1.1.5
EMI Filter
7.1.2
Error Amplifier and Compensation
7.2
Typical Applications
7.2.1
High Efficiency 2.1MHz CC-CV Regulator
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.1.2.1
Buck Inductor
7.2.1.2.2
Current-Sense Resistance
7.2.1.2.3
Output Capacitors
7.2.1.2.4
Input Capacitors
7.2.1.2.5
Frequency Set Resistor
7.2.1.2.6
Feedback Resistors
7.2.1.3
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.1.1
Power Stage Layout
7.4.1.2
Gate-Drive Layout
7.4.1.3
PWM Controller Layout
7.4.1.4
Thermal Design and Layout
7.4.1.5
Ground Plane Design
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Development Support
8.2
Documentation Support
8.2.1
Related Documentation
8.2.1.1
PCB Layout Resources
8.2.1.2
Thermal Design Resources
8.3
Receiving Notification of Documentation Updates
8.4
Support Resources
8.5
Trademarks
8.6
Electrostatic Discharge Caution
8.7
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGY|19
MPQF777A
Thermal pad, mechanical data (Package|Pins)
RGY|19
QFND818
Orderable Information
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Data Sheet
LM25190
42V
, Synchronous, Buck Controller With Constant-Current and
Constant-Voltage Regulation