MMPF0100 datasheet(56/137 Pages) NXP

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NXP Semiconductors

PF0100

FUNCTIONAL BLOCK REQUIREMENTS AND BEHAVIORS

6.4.4.4.2

SW2 external components

6.4.4.4.3

SW2 Specifications

Table 62. SW2 external component recommendations

Components

Description

Values

CINSW2(49)

SW2 input capacitor

4.7

μF

CIN2HF(49)

SW2 decoupling input capacitor

0.1

μF

COSW2(49)

SW2 output capacitor

3 x 22

μF

LSW2

SW2 inductor

1.0

μH

Notes

49.

Use X5R or X7R capacitors.

Table 63. SW2 electrical characteristics

All parameters are specified at TMIN to TMAX (See Table 3), VIN = VINSW2 = 3.6 V, VSW2 = 3.15 V, ISW2 = 100 mA,

SW2_PWRSTG[2:0] = [111], typical external component values, fSW2 = 2.0 MHz, unless otherwise noted. Typical values are

characterized at VIN = VINSW2 = 3.6 V, VSW2 = 3.15 V, ISW2 = 100 mA, SW2_PWRSTG[2:0] = [111], and 25 °C, unless otherwise noted.

Symbol

Parameter

Min

Typ

Max

Unit

Notes

Switch mode supply SW2

VINSW2

Operating input voltage

2.8

–

4.5

(50)

VSW2

Nominal output voltage

–

Table 55

–V

VSW2ACC

Output voltage accuracy

• PWM, APS, 2.8 V < VIN < 4.5 V, 0 < ISW2 < 2.0 A

• 0.625 V < VSW2 < 0.85 V

• 0.875 V < VSW2 < 1.975 V

• 2.0 V < VSW2 < 3.3 V

• PFM, 2.8 V < VIN < 4.5 V, 0 < ISW2 ≤ 50 mA

• 0.625 V < VSW2 < 0.675 V

• 0.7 V < VSW2 < 0.85 V

• 0.875 V < VSW2 < 1.975 V

• 2.0 V < VSW2 < 3.3 V

-25

-3.0%

-6.0%

-65

-45

-3.0%

–

3.0%

6.0%

3.0%

ISW2

Rated output load current

• 2.8 V < VIN < 4.5 V, 0.625 V < VSW2 < 3.3 V

• 2.8 V < VIN < 4.5 V, 1.2 V < VSW2 < 3.3 V, SW2LIM = 0

–

2000

2500

(51)

(52)

ISW2LIM

Current limiter peak current detection

• Current through inductor

• SW2ILIM = 0

• SW2ILIM = 1

2.8

2.1

4.0

3.0

5.2

3.9

VSW2OSH

Start-up overshoot

• ISW2 = 0.0 mA

• DVS clk = 25 mV/4

μs, VIN = VINSW2 = 4.5 V

––

tONSW2

Turn-on time

• Enable to 90% of end value

• ISW2 = 0.0 mA

• DVS clk = 50 mV/8

μs, VIN = VINSW2 = 4.5 V

–

550

µs

fSW2

Switching frequency

• SW2FREQ[1:0] = 00

• SW2FREQ[1:0] = 01

• SW2FREQ[1:0] = 10

–

1.0

2.0

4.0

–

MHz

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