SLVSES8A
October 2020 – December 2020
LM5127-Q1
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Device Enable (EN, VCC_HOLD)
8.3.2
Dual Input VCC Regulator (BIAS, VCCX, VCC)
8.3.3
Dual Input VDD Switch (VDD, VDDX)
8.3.4
Device Configuration and Light Load Switching Mode Selection (CFG/MODE)
8.3.5
Fixed or Adjustable Output Regulation Target (VOUT, FB)
8.3.6
Overvoltage Protection (VOUT, FB)
8.3.7
Power Good Indicator (PGOOD)
8.3.8
Programmable Switching Frequency (RT)
8.3.9
External Clock Synchronization (SYNC)
8.3.10
Programmable Spread Spectrum (DITHER)
8.3.11
Programmable Soft Start (SS)
8.3.12
Fast Re-start using VCC_HOLD (VCC_HOLD)
8.3.13
Transconductance Error Amplifier and PWM (COMP)
8.3.14
Current Sensing and Slope Compensation (CSA, CSB)
8.3.15
Constant Peak Current Limit (CSA, CSB)
8.3.16
Maximum Duty Cycle and Minimum Controllable On-time Limits (Boost)
8.3.17
Bypass Mode (Boost)
8.3.18
Minimum Controllable On-time and Minimum Controllable Off-time Limits (Buck)
8.3.19
Low Dropout Mode for Extended Minimum Input Voltage (Buck)
8.3.20
Programmable Hiccup Mode Overload Protection (RES)
8.3.21
MOSFET Drivers and Hiccup Mode Fault Protection (LO, HO, HB)
8.3.22
Battery Monitor (BMOUT, BMIN_FIX, BMIN_PRG)
8.3.23
Dual-phase Interleaved Configuration for High Current Supply (CFG)
8.3.24
Thermal Shutdown Protection
8.3.25
External VCCX Supply Reduces Power Dissipation
8.4
Device Functional Modes
8.4.1
Device Status
8.4.1.1
Shutdown Mode
8.4.1.2
Configuration Mode
8.4.1.3
Active Mode
8.4.1.4
Sleep Mode
8.4.1.5
Deep Sleep Mode
8.4.1.5.1
Cutting Leakage Path in Deep Sleep Mode (DIS, SLEEP1, SENSE1)
8.4.1.6
VCC HOLD Mode
8.4.2
Light Load Switching Mode
8.4.2.1
Forced PWM (FPWM) Operation
8.4.2.2
Diode Emulation (DE) Operation (Connect RSS at SS)
8.4.2.3
Forced Diode Emulation Operation in FPWM Mode
8.4.2.4
Skip Mode Operation
8.4.3
LM5127 Cheat Sheet
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Recommended Power Tree Architecture
9.2.2.2
Application Ideas
9.2.3
Application Curves
9.3
System Examples
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.1.2
Development Support
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Receiving Notification of Documentation Updates
12.4
Support Resources
12.5
Trademarks
12.6
Electrostatic Discharge Caution
12.7
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGZ|48
MPQF123F
Thermal pad, mechanical data (Package|Pins)
RGZ|48
QFND585
Orderable Information
slvses8a_oa
slvses8a_pm
12.2
Documentation Support