MIC2811_08 Datasheet, PDF (11/17 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC with Triple 300mA LDOs

Micrel, Inc.
MIC2811/2821
Functional Diagram
DVIN
VIN
6
BIAS
C_BIAS
EN
Enable and
Control Logic
BIAS
Bias,
UVLO,
Thermal
Shutdown
EN3
(MIC2821)
LDO
Current
Limit
BIAS
VIN1
EN1
LDO
Current
Limit
VIN2
EN2
LDO
Current
Limit
SGND
0.8V
P-Channel
Current Limit
PWM
Control
HSD
Anti-Shoot
Through
LSD
N-Channel
Current Limit
Soft
Start
EA
1.0V
SW
V_OUT
C_OUT
PGND
FB
R1
Internal for
Fixed Output
Options
R2
Connect V_OUT
directly to FB
EA
EA
EA
BIAS
LDO1 & 2
Quick Start
Ref Voltage
LDO3
C_LDO3
LDO1
C_LDO1
LDO2
C_LDO2
750k
BYP
0.8V
C_{BYP (MIC2811)}
Block Diagram
April 2008
11
M9999-042208-A