MCP1642D-18ISLASHMS datasheet(9/32 Pages) MICROCHIP

Part #	MCP1642D-18I/MS

Description	1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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9 / 32 page

 2014 Microchip Technology Inc.

DS20005253A-page 9

MCP1642B/D

Note: Unless otherwise indicated, VIN =EN= 1.2V, COUT =CIN =10µF, L = 4.7µH, VOUT =3.3V, ILOAD =15mA,

TA = +25°C (MCP1642B/D-ADJ, MSOP-8 package).

FIGURE 2-13:

Average of No Load Input

Current vs. VIN.

FIGURE 2-14:

N-Channel and P-Channel

RDSON vs. > of VIN or VOUT.

FIGURE 2-15:

MCP1642B/D 3.3V VOUT

Light Load PWM Mode Waveforms.

FIGURE 2-16:

MCP1642B/D High Load

PWM Mode Waveforms.

FIGURE 2-17:

3.3V Start-Up After Enable.

FIGURE 2-18:

3.3V Start-Up When

VIN =VENABLE.

0.1

100

0.8

1.2

1.6

2.4

2.8

3.2

3.6

4.4

IN (V)

OUT = 2.0V

OUT = 3.3V

OUT = 5.0V

0.05

0.1

0.15

0.2

0.25

0.5

1.5

2.5

1.4

1.8

2.2

2.6

3.4

3.8

4.2

> V

IN or VOUT

P - Channel

N - Channel

IOUT =1 mA

1µs/div

VOUT

20 mV/div

AC coupled

VSW

1V/div

100 mA/div

IOUT =100 mA

VSW

1µs/div

VOUT

20 mV/div

AC coupled

2V/div

200 mA/div

IOUT =15 mA

VOUT

1V/div

VEN

1V/div

200 µs/div

VIN

1V/div

200 mA/div

2V/div

VOUT

200 µs/div

1V/div

VIN

= 15 mA

OUT

MCP1642D-18I/MS Datasheet(PDF) 9 Page - Microchip Technology

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