MCP1256 Microchip Technology, MCP1256 Datasheet - Page 2

• Manufacturer Part Number: MCP1256
• Description: Regulated 3.3V, Low-Ripple Charge Pump with Low-Operating Current SLEEP Mode or BYPASS Mode
• Manufacturer: Microchip Technology

MCP1256/7/8/9
Package Pinouts
Functional Block Diagram
TABLE 1:
DS21989A-page 2
Legend: L is Logic Low, H is Logic High
BYPASS
V
GND
Mode
IN
1.5x
1.5x
2x
2x
720k
840 k
Charging
Charging
Transfer
Transfer
Bandgap
Phase
Ref.
—
BYPASS
SWITCH LOGIC
PGOOD
PGOOD
SLEEP
V
V
C
C
OUT
OUT
C
C
V
1
1
OUT
2
2
+
+
-
-
840 k
480 k
Oscillator
650 kHz
1.5x, 2x Mode
Comparator
+
-
Osc.
1
2
3
4
5
1
2
3
4
5
—
H
H
L
L
MCP1256
MCP1258
CE
Feedback
Amplifier
D Q
+
-
—
Q
H
H
L
L
Gate Drives
10
10
9
8
7
6
9
8
7
6
S5,S7
S6
S4
S1,S3,CE
SHDN
GND
C
V
C
SHDN
GND
C
V IN
C
IN
1
2
1
2
S1
-
+
-
+
H
H
H
L
L
S2
S1
S2(CE)
H
H
L
L
L
C
2
-
BYPASS
SLEEP
C
S3
2
V
V
+
LBO
LBO
C
C
OUT
OUT
C
C
S3
H
H
H
L
L
1
1
2
2
+
+
S4
-
-
1
2
3
4
5
1
2
3
4
5
S5
MCP1257
MCP1259
S4
H
H
H
L
L
C
1
-
© 2006 Microchip Technology Inc.
C
S5
H
H
1
L
L
L
10
10
9
8
7
6
9
8
7
6
+
SHDN
GND
C
V
C
SHDN
GND
C
V
C
IN
IN
1
2
1
2
-
+
-
+
S6
H
H
H
L
L
S6
S7
V
S7
H
L
L
L
L
OUT