SNVSAH5A
September 2017 – May 2020
LM73605
,
LM73606
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Efficiency versus Load Current VOUT = 5 V, fSW = 500 kHz, Auto Mode
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
Timing Characteristics
6.7
Switching Characteristics
6.8
System Characteristics
6.9
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Synchronous Step-Down Regulator
7.3.2
Auto Mode and FPWM Mode
7.3.3
Fixed-Frequency Peak Current-Mode Control
7.3.4
Adjustable Output Voltage
7.3.5
Enable and UVLO
7.3.6
Internal LDO, VCC_UVLO, and BIAS Input
7.3.7
Soft Start and Voltage Tracking
7.3.8
Adjustable Switching Frequency
7.3.9
Frequency Synchronization and Mode Setting
7.3.10
Internal Compensation and CFF
7.3.11
Bootstrap Capacitor and VBOOT-UVLO
7.3.12
Power-Good and Overvoltage Protection
7.3.13
Overcurrent and Short-Circuit Protection
7.3.14
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Shutdown Mode
7.4.2
Standby Mode
7.4.3
Active Mode
7.4.3.1
CCM Mode
7.4.3.2
DCM Mode
7.4.3.3
PFM Mode
7.4.3.4
Fault Protection Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Output Voltage Setpoint
8.2.2.3
Switching Frequency
8.2.2.4
Input Capacitors
8.2.2.5
Inductor Selection
8.2.2.6
Output Capacitor Selection
8.2.2.7
Feedforward Capacitor
8.2.2.8
Bootstrap Capacitors
8.2.2.9
VCC Capacitor
8.2.2.10
BIAS
8.2.2.11
Soft Start
8.2.2.12
Undervoltage Lockout Setpoint
8.2.2.13
PGOOD
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Layout For EMI Reduction
10.1.2
Ground Plane
10.1.3
Optimize Thermal Performance
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Development Support
11.1.2.1
Custom Design With WEBENCH® Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Related Links
11.4
Receiving Notification of Documentation Updates
11.5
Support Resources
11.6
Trademarks
11.7
Electrostatic Discharge Caution
11.8
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RNP|30
MPQF448C
Thermal pad, mechanical data (Package|Pins)
RNP|30
QFND665
Orderable Information
snvsah5a_oa
snvsah5a_pm
11.1.2
Development Support