MCP1640T-ICHY datasheet(7/32 Pages) MICROCHIP

Part #	MCP1640T-ICHY

Description	0.65V Start-up Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option

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Manufacturer	MICROCHIP [Microchip Technology]

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 2010 Microchip Technology Inc.

DS22234A-page 7

MCP1640/B/C/D

Note: Unless otherwise indicated, VIN = EN = 1.2V, COUT =CIN =10 µF, L =4.7 µH, VOUT =3.3V, ILOAD =15 mA, TA =+25°C.

FIGURE 2-13:

Input No Load Current vs.

VIN.

FIGURE 2-14:

N-Channel and P-Channel

RDSON vs. > of VIN or VOUT.

FIGURE 2-15:

PFM / PWM Threshold

Current vs. VIN.

FIGURE 2-16:

MCP1640 3.3V VOUT PFM

Mode Waveforms.

FIGURE 2-17:

MCP1640B 3.3V VOUT

PWM Mode Waveforms.

FIGURE 2-18:

MCP1640/B High Load

Waveforms.

10

100

1000

10000

0.8

1.1

1.4

1.7

2

2.3

2.6

2.9

3.2

3.5

VIN (V)

VOUT = 3.3V

VOUT = 5.0V

VOUT = 2.0V

V

OUT = 2.0V

VOUT = 3.3V

VOUT = 5.0V

PWM / PFM

PWM ONLY

0

1

2

3

4

5

1

1.5

2

2.5

3

3.5

4

4.5

5

> VIN or VOUT

P - Channel

N - Channel

0

2

4

6

8

10

12

14

16

0

0.511.522.5

3

3.5

4

VIN (V)

VOUT = 2.0V

VOUT = 3.3V

VOUT = 5.0V

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MCP1640T-ICHY Datasheet(PDF) 7 Page - Microchip Technology

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