SLUSD97
April 2018
LM25119Q
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Typical Application Circuit
4
Revision History
5
Pin Configuration and Functions
Pin 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
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
High Voltage Start-Up Regulator
7.3.2
UVLO
7.3.3
Enable 2
7.3.4
Oscillator and Sync Capability
7.3.5
Error Amplifiers and PWM Comparators
7.3.6
Ramp Generator
7.3.7
Current Limit
7.3.8
Hiccup Mode Current Limiting
7.3.9
Soft Start
7.3.10
HO and LO Output Drivers
7.3.11
Maximum Duty Cycle
7.3.12
Thermal Protection
7.4
Device Functional Modes
7.4.1
Diode Emulation
8
Application and Implementation
8.1
Application Information
8.1.1
Miscellaneous Functions
8.1.2
Interleaved Two-Phase Operation
8.1.3
Interleaved 4-Phase Operation
8.2
Typical Applications
8.2.1
Dual-output Design Example
8.2.1.1
Design Requirements
8.2.1.1.1
External Components
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Timing Resistor
8.2.1.2.2
Output Inductor
8.2.1.2.3
Current Sense Resistor
8.2.1.2.4
Ramp Resistor and Ramp Capacitor
8.2.1.2.5
Output Capacitors
8.2.1.2.6
Input Capacitors
8.2.1.2.7
VCC Capacitor
8.2.1.2.8
Bootstrap Capacitor
8.2.1.2.9
Soft Start Capacitor
8.2.1.2.10
Restart Capacitor
8.2.1.2.11
Output Voltage Divider
8.2.1.2.12
UVLO Divider
8.2.1.2.13
MOSFET Selection
8.2.1.2.14
MOSFET Snubber
8.2.1.2.15
Error Amplifier Compensation
8.2.1.3
Application Curves
8.2.2
Two-Phase Design Example
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Switching Jitter Root Causes and Solutions
10.2
Layout Example
11
Device and Documentation Support
11.1
Community Resources
11.2
Trademarks
11.3
Electrostatic Discharge Caution
11.4
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RTV|32
MPQF166B
Thermal pad, mechanical data (Package|Pins)
RTV|32
QFND448B
Orderable Information
slusd97_oa
slusd97_pm
4
Revision History
DATE
REVISION
NOTES
April 2018
*
Initial release. Previously included with the LM25119 data sheet. To view previous revision history, see
SNVS680
.