MCP1631 Microchip Technology Inc., MCP1631 Datasheet - Page 4

• Manufacturer Part Number: MCP1631
• Description: High-speed, Pulse Width Modulator
• Manufacturer: Microchip Technology Inc.

MCP1631/HV/MCP1631V/VHV
Functional Block Diagram
DS22063A-page 4
SHDN
A
OSC
OV
CS/VR
V
V
COMP
FB
VDD_OUT
IN
REF
IN
Note 1: For Shutdown control, amplifier A3 remains functional so
IN
AMP
2: For HV options, internal Low Drop Out Regulator provides
/ A
A
V
GND
-
+
A1
VDD_IN
battery voltage can be sensed during discharge phase.
+3.3V or +5.0V bias to V
DD
+3.3V or +5.0V
LDO
250 mA
2.7V Clamp
V
DD
2R
V
(1)
Shutdown Control
A3 Remains On
DD
MCP1631HV/VHV High Speed PIC PWM
0.1 µA
+
C1
-
DD
V
V
DD
.
DD
OSC
R
S
R
DIS
Remove for MCP1631V
and MCP1631VHV Options
Internal
1.2V V
100 kΩ
Internal Regulator for MCP1631HV and MCP1631VHV
Options Only; For MCP1631 and MCP1631V AV
REF
UVLO
V
+
-
C2
DD
Q
Overvoltage Comp
w/ Hysteresis
Q
OT
© 2007 Microchip Technology Inc.
10R
V
V
A3
A2
DD
DD
P
VDD
+
+
-
-
R
R
DD_IN
P
V
GND
100 kΩ
VS
is input
IS
EXT
VS
OUT
OUT
IS
IN
IN