SNVSB55E
February 2019 – June 2020
LM63615-Q1
,
LM63625-Q1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Typical Solution Example IOUT = 2.5 A, ƒSW = 2200 kHz
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
Pin 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
Timing Characteristics
7.7
Switching Characteristics
7.8
System Characteristics
7.9
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Sync/Mode Selection
8.3.2
Output Voltage Selection
8.3.3
Switching Frequency Selection
8.3.3.1
Spread Spectrum Option
8.3.4
Enable and Start-up
8.3.5
RESET Flag Output
8.3.6
Undervoltage Lockout and Thermal Shutdown and Output Discharge
8.4
Device Functional Modes
8.4.1
Overview
8.4.2
Light Load Operation
8.4.2.1
Sync/FPWM Operation
8.4.3
Dropout Operation
8.4.4
Minimum On-time Operation
8.4.5
Current Limit and Short-Circuit Operation
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
Choosing the Switching Frequency
9.2.2.2
Setting the Output Voltage
9.2.2.2.1
CFF Selection
9.2.2.3
Inductor Selection
9.2.2.4
Output Capacitor Selection
9.2.2.5
Input Capacitor Selection
9.2.2.6
CBOOT
9.2.2.7
VCC
9.2.2.8
External UVLO
9.2.2.9
Maximum Ambient Temperature
9.2.3
Full Feature Design Example
9.2.4
Application Curves
9.2.5
EMI Performance Curves
9.3
What to Do and What Not to Do
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Ground and Thermal Considerations
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Related Links
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)
PWP|16
MPDS371A
DRR|12
MPSS085
Thermal pad, mechanical data (Package|Pins)
PWP|16
PPTD262C
DRR|12
PPTD366
Orderable Information
snvsb55e_oa
snvsb55e_pm
1
Features
AEC-Q100-Qualified for automotive applications
Device temperature grade 1: –40°C to +125°C ambient operating temperature
Functional safety capable
Documentation available to aid functional safety system design
Supports automotive system requirements
Input voltage range: 3.5 V to
36 V
Short minimum on-time of 50 ns
Good
EMI
performance
Pseudo-random spread spectrum
Compatible with CISPR 25
Low operating quiescent current of 23 µA
Junction temperature range –40°C to +150°C
High design flexibility
Pin selectable V
OUT
: 3.3 V, 5 V, adjustable
1 V to 20 V
Pin compatible with
LM63610
/
LM63635
(1A,
3.25 A
)
Pin selectable frequency: 400 kHz, 2.1 MHz,
adjustable 250 kHz to 2200 kHz
Pin selectable FPWM, AUTO, sync modes
TSSOP: Thermally-enhanced package
WSON: For space-constrained applications
Small solution size
As small as: 10 mm x 10 mm for 2.5 A, 2.2 MHz with WSON package
Highly integrated solution
Low component count