MCP1642B datasheet(8/32 Pages) MICROCHIP

8 / 32 page

MCP1642B/D

DS20005253A-page 8

 2014 Microchip Technology Inc.

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 2-7:

Maximum IOUT vs. VIN.

FIGURE 2-8:

3.3V VOUT vs. VIN.

FIGURE 2-9:

3.3V VOUT Minimum

Start-Up and Shutdown VIN into Resistive Load

vs. IOUT.

FIGURE 2-10:

5.0V VOUT Minimum

Start-Up and Shutdown VIN into Resistive Load

vs. IOUT.

FIGURE 2-11:

fSW vs. Ambient

Temperature.

FIGURE 2-12:

PWM Pulse-Skipping Mode

Threshold vs. IOUT.

200

400

600

800

1000

1200

1400

0.8

1.2

1.6

2.4

2.8

3.2

3.6

4.4

IN (V)

OUT = 3.3V

OUT = 2.0V

OUT = 5.0V

A = +25°C

A = +85°C

3.290

3.292

3.294

3.296

3.298

3.300

3.302

3.304

0.8

1.2 1.4 1.6 1.8

2.2 2.4 2.6 2.8

IN (V)

A =-40°C

OUT = 15 mA

A =

25°C

A =

85°C

0.30

0.35

0.40

0.45

0.50

0.55

0.60

0.65

0.70

20406080

100

OUT (mA)

Start-up

Shutdown

OUT = 3.3V

0.30

0.50

0.70

0.90

1.10

1.30

1.50

20406080

100

OUT (mA)

Start-up

Shutdown

OUT = 5.0V

988

992

996

1000

1004

-40

-25

-10

Ambient Temperature (°C)

OUT = 3.3V

0.5

1.5

2.5

3.5

4.5

OUT (mA)

OUT = 3.3V

OUT = 5.0V

OUT = 2.0V

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