MMPF0100 datasheet(76/136 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

PF0100

Functional Block Requirements and Behaviors

Power Generation

SW4 External Components

SW4 Specifications

Table 85. SW4 External Component Requirements

Components

Description

Values

CINSW4(44)

SW4 Input capacitor

4.7

μF

CIN4HF(44)

SW4 Decoupling input capacitor

0.1

μF

COSW4(44)

SW4 Output capacitor

2 x 22

μF

LSW4

SW4 Inductor

1.0

μH

DCR = 60 m

ISAT = 3.0 A

Notes

44.

Use X5R or X7R capacitors.

Table 86. SW4 Electrical Characteristics

All parameters are specified at TA = -40 to 85 °C, VIN = VINSW4 = 3.6 V, VSW4 = 1.8 V, ISW4 = 100 mA,

SW4_PWRSTG[2:0] = [101], typical external component values, fSW4 = 2.0 MHz, single/dual phase and independent mode

unless, otherwise noted. Typical values are characterized at VIN = VINSW4 = 3.6 V, VSW4 = 1.8 V, ISW4 = 100 mA,

SW4_PWRSTG[2:0] = [101], and 25 °C, unless otherwise noted.

Parameter

Symbol

Min

Typ

Max

Unit

SWITCH MODE SUPPLY SW4

Operating Input Voltage (45)

VINSW4

2.8

–

4.5

Nominal Output Voltage

Normal operation

VTT Mode

VSW4

–

Table 78

VSW3AFB/2

–

Output Voltage Accuracy

• PWM, APS, 2.8 V < VIN < 4.5 V, 0 < ISW4 < 1.0 A

0.4 V < VSW4 < 0.85 V

0.875 V < VSW4 < 1.975 V

2.0 V < VSW4 < 3.3 V

• PFM, steady state, 2.8 V < VIN < 4.5 V, 0 < ISW4 < 50 mA

0.4 V < VSW4 < 0.85 V

0.875 V < VSW4 < 1.975 V

2.0 V < VSW4 < 3.3 V

• VTT Mode , 2.8 V < VIN < 4.5 V, 0 < ISW4 < 1.0 A

VSW4ACC

-25

-3.0%

-6.0%

-65

-6.0%

-40

–

3.0%

6.0%

Rated Output Load Current (46)

2.8 V < VIN < 4.5 V, 0.4 V < VSW4 < 3.3 V

ISW4

–

1000

Current Limiter Peak Current Detection

Current through inductor

SW4ILIM = 0

SW4ILIM = 1

ISW4LIM

1.4

1.0

2.0

1.5

3.0

2.4

Start-up Overshoot

ISW4 = 0.0 mA

DVS clk = 25 mV/4

μs, VIN = VINSW4 = 4.5 V

VSW4OSH

––

Turn-on Time

Enable to 90% of end value

ISW4 = 0.0 mA

DVS clk = 25 mV/4

μs, VIN = VINSW4 = 4.5 V

tONSW4

–

500

µs

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