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MCP1257 Просмотр технического описания (PDF) - Microchip Technology
Номер в каталоге
Компоненты Описание
производитель
MCP1257
Regulated 3.3V, Low-Ripple Charge Pump with Low-Operating Current SLEEP Mode or BYPASS Mode
Microchip Technology
MCP1257 Datasheet PDF : 24 Pages
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MCP1256/7/8/9
Package Pinouts
PGOOD 1
MCP1256
10 SHDN
SLEEP 2
9 GND
C
2
- 3
C
1
+ 4
V
OUT
5
8 C
1
-
7 V
IN
6 C
2
+
LBO 1
MCP1257
10 SHDN
SLEEP 2
9 GND
C
2
- 3
C
1
+ 4
V
OUT
5
8 C
1
-
7 V
IN
6 C
2
+
PGOOD
1
MCP1258
10 SHDN
BYPASS
2
9 GND
C
2
- 3
C
1
+ 4
V
OUT
5
8 C
1
-
7 VIN
6 C
2
+
LBO 1
MCP1259
10 SHDN
BYPASS 2
9 GND
C
2
- 3
C
1
+ 4
V
OUT
5
8 C
1
-
7 V
IN
6 C
2
+
Functional Block Diagram
V
IN
C
2
- C
2
+
C
1
- C
1
+
840 k
Ω
1.5x, 2x Mode
Comparator
+
-
DQ
650 kHz
Osc.
Gate Drives
S1
S5,S7
S6
S4
S1,S3,CE
V
OUT
840 k
Ω
CE
S2
Bandgap
Ref.
+
-
720k
Ω
480 k
Ω
Feedback
Amplifier
GND
S5
S4
S3
S6
S7
V
OUT
TABLE 1: SWITCH LOGIC
Mode Phase Oscillator
Q
S1 S2(CE) S3
S4
S5
S6
S7
1.5x Charging
H
L
H
H
H
L
H
L
H
1.5x Transfer
L
L
L
L
L
H
L
H
L
2x Charging
H
H
H
H
H
L
L
H
L
2x Transfer
L
H
L
L
L
H
L
H
L
BYPASS —
—
—
H
L
H
H
H
L
L
Legend:
L is Logic Low, H is Logic High
DS21989A-page 2
©
2006 Microchip Technology Inc.
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