MCP1603 datasheet(9/34 Pages) MICROCHIP

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 2007-2012 Microchip Technology Inc.

DS22042B-page 9

MCP1603/B/L

Note:

Unless

otherwise

indicated,

MCP1603/L,

VIN = SHDN =3.6V,

COUT =CIN = 4.7 µF,

= 4.7 µH,

VOUT(ADJ) = 1.8V, ILOAD = 100 mA, TA = +25°C. Adjustable or fixed output voltage options can be used to generate the

Typical Performance Characteristics.

FIGURE 2-13:

Efficiency vs. Input Voltage

(VOUT = 3.3V).

FIGURE 2-14:

Efficiency vs. Output Load

(VOUT = 3.3V).

FIGURE 2-15:

PWM-Only Device Minimum

Load for Regulation (MCP1603B).

FIGURE 2-16:

Switching Frequency vs.

Ambient Temperature.

FIGURE 2-17:

Switching Frequency vs.

Input Voltage.

FIGURE 2-18:

Switch Resistance vs. Input

Voltage.

90.0

92.5

95.0

97.5

100.0

OUT = 3.3V

OUT = 100 mA

OUT = 500 mA

OUT = 300 mA

85.0

87.5

3.5

3.75

4.25

4.5

4.75

5.25

5.5

Input Voltage (V)

100

IN = 4.2V

IN = 3.6V

0.1

100

1000

Output Current (mA)

OUT = 3.3V

PFM/PWM

PWM Only

A= -40

A= +25

A=+85

Regulation

1.8

2.2

2.4

2.6

2.8

3.2

3.4

3.6

IN -VOUT (V)

A= +85 C

No Regulation

2.05

2.10

2.15

2.20

1.95

2.00

-40 -25 -10

20 35 50 65 80 95 110 125

Ambient Temperature (oC)

200

2.05

2.10

2.15

2.20

1.95

2.00

2.7

3.05

3.4

3.75

4.1

4.45

4.8

5.15

5.5

Input Voltage (V)

0.45

0.50

0.55

0.60

0.65

N-Channel

P-Channel

0.35

0.40

2.7 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5

Input Voltage (V)

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