MIC2044/2045
Micrel
MIC2044/2045
10
January 2005
Functional Diagram
MIC2044/45
Bandgap
Reference
OSC
UVLO
5.3x
1x
V
REF
= 230mV
Current
Limit
Replica
Amp
+
+
V
IN
ILIM
6
VOUT
9,12,14
VBIAS
8
VIN
7,11,13,16
/FAULT
3
GND
10
+
Gate
Control
UVLOIN
5
SLEW
4
EN
2
PGREF
15
Open
Load
Detect
I
LIM
Delay
(32ms)
PWRGD
1
+
Error
Flag
Logic
Power-On
Reset
Input
Logic
Latch
(MIC2045)
Charge
Pump
Thermal
Shutdown
Power-Off
Reset
