MCP1256 データシートの表示（PDF） - Microchip Technology

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MCP1256

Regulated 3.3V, Low-Ripple Charge Pump with Low-Operating Current SLEEP Mode or BYPASS Mode

Microchip Technology 

MCP1256/7/8/9

Package Pinouts

PGOOD 1 MCP1256 10 SHDN

SLEEP 2

9 GND

C2- 3

C1+ 4

VOUT 5

8 C1-

7 VIN

6 C2+

LBO 1 MCP1257 10 SHDN

SLEEP 2

9 GND

C2- 3

C1+ 4

VOUT 5

8 C1-

7 VIN

6 C2+

PGOOD 1 MCP1258 10 SHDN

BYPASS 2

9 GND

C2- 3

C1+ 4

VOUT 5

8 C1-

7 VIN

6 C2+

LBO 1 MCP1259 10 SHDN

BYPASS 2

9 GND

C2- 3

C1+ 4

VOUT 5

8 C1-

7 VIN

6 C2+

Functional Block Diagram

VIN

C2- C2+

C1- C1+

840 kΩ

1.5x, 2x Mode

Comparator

+

-

DQ

650 kHz

Osc.

Gate Drives

S1

S5,S7

S6

S4

S1,S3,CE

VOUT

840 kΩ CE

S2

Bandgap

Ref.

+

-

720kΩ

480 kΩ

Feedback

Amplifier

GND

S5

S4

S3

S6

S7

VOUT

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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