Datasheet

MCP1631/HV/MCP1631V/VHV
DS22063B-page 4 © 2008 Microchip Technology Inc.
Functional Block Diagram
(1)
MCP1631HV/VHV High Speed PIC PWM
R
S
Q
Q
A1
+
-
V
REF
FB
C1
+
-
CS/VR
AMP
OSC
IN
P
VDD
COMP
P
GND
V
EXT
2R
2.7V Clamp
OT
UVLO
100 kΩ
0.1 µA
V
DD
R
+
-
R
R
10R
+
-
A2
A3
+3.3V or +5.0V
LDO
250 mA
V
IN
A
VDD_OUT
/ A
VDD_IN
V
DD
Shutdown Control
A3 Remains On
SHDN
IS
IN
IS
OUT
VS
IN
VS
OUT
C2
+
-
V
DD
A
GND
OV
IN
Overvoltage Comp
w/ Hysteresis
Internal
1.2V V
REF
OSC
DIS
100 kΩ
Remove for MCP1631V
and MCP1631VHV Options
Internal Regulator for MCP1631HV and MCP1631VHV
Options Only; For MCP1631 and MCP1631V AV
DD_IN
is input
V
DD
V
DD
V
DD
V
DD
V
DD
Note 1: For Shutdown control, amplifier A3 remains functional so
battery voltage can be sensed during discharge phase.
2: For HV options, internal Low Drop Out Regulator provides
+3.3V or +5.0V bias to V
DD
.