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DS20006388E-page 11

MCP16501

Note: Unless otherwise specified: VIN = VIN = PVINx = 5V; L1 = L2 = L3 = 2.2 µH; COUT1 = COUT2 = COUT3 = 22 µF, TA

= +25°C

FIGURE 2-7:

Switching Frequency vs.

Temperature – Active Mode (LPM = Low,

PWRHLD = High).

FIGURE 2-8:

Buck3 Output Voltage vs.

Temperature – VOUT3 = 1.25V, Active Mode

(LPM = Low, PWRHLD = High).

FIGURE 2-9:

MOSFET RDS(ON) vs.

Temperature.

FIGURE 2-10:

LDO Output Voltage vs.

Output Current and Temperature (Load

Regulation – VLOUT =3.3V).

FIGURE 2-11:

LDO Dropout Voltage vs.

Load Current.

FIGURE 2-12:

nSTRT Start-Up Sequence.

1.80

1.85

1.90

1.95

2.00

2.05

2.10

-40 -25 -10

5

20 35 50 65 80 95 110 125

Ambient Temperature (°C)

V

R_BUCK1 = 3.3V

V

R_BUCK2 = 1.8V

Buck1

Buck2

Buck3

V

R_BUCK3 = 1.25V

V

IN=5V

1.230

1.235

1.240

1.245

1.250

1.255

1.260

-40 -25 -10

5

20 35 50 65 80 95 110 125

Ambient Temperature (°C)

V

R_BUCK3 = 1.25V

V

IN = 5V

0.09

0.10

0.11

0.12

0.13

0.14

0.15

0.16

0.17

0.18

0.19

-40 -25 -10

5

203550658095 110 125

Ambient Temperature (°C)

P-MOS

N-MOS

V

IN = 5V

3.20

3.21

3.22

3.23

3.24

3.25

3.26

3.27

0

50

100

150

200

250

300

Output Current (A)

T

A = -40°C

V

IN = 5V

T

A =

5°C

T

A =

25°C

T

A =

°C

0

20

40

60

80

100

120

140

160

0.00

0.05

0.10

0.15

0.20

0.25

0.30

Output Current (A)

PWRHLD=’1’

nSTRT

VOUT1

2V/div

VOUT2

2V/div

VOUT3

2V/div

nRSTO

5V/div

4 ms/div