MIC23031 Datasheet, PDF (9/17 Pages) Micrel Semiconductor – 4MHz PWM 400mA Buck Regulator with Hyper Light Load™

Micrel Inc.
Functional Diagram
VIN
EN
UVLO
Reference
CONTROL
LOGIC
Timer &
Softstart
Gate
Drive
ERROR
COMPARATOR
Current
Limit
ZERO 1
ISENSE
MIC23031
SW
PGND
SNS
AGND
Simplified MIC23031 Fixed Functional Block Diagram
VIN
EN
UVLO
CONTROL
LOGIC
Timer &
Softstart
Reference
Gate
SW
Drive
ERROR
COMPARATOR
Current
Limit
ZERO 1
ISENSE
SNS
FB
GND
Simplified MIC23031 Adjustable Functional Block Diagram
May 2008
9
M9999-051608-A