MMPF0200 datasheet(58/114 Pages) NXP

58 / 114 page

NXP Semiconductors

PF0200

FUNCTIONAL BLOCK REQUIREMENTS AND BEHAVIORS

Figure 17. SW3AB single phase efficiency waveforms

6.4.5

Boost regulator

SWBST is a boost regulator with a programmable output from 5.0 to 5.15 V. SWBST can supply the VUSB regulator for the USB PHY in

OTG mode, as well as the VBUS voltage. Note that the parasitic leakage path for a boost regulator will cause the SWBSTOUT and

SWBSTFB voltage to be a Schottky drop below the input voltage whenever SWBST is disabled. The switching NMOS transistor is

integrated on-chip. Figure 18 shows the block diagram and component connection for the boost regulator.

Switch mode supply SW3a/B (continued)

ISW3ANQ

SW3A N-MOSFET Leakage Current

VIN = VINSW3A = 4.5 V

––

2.5

µA

RONSW3BP

SW3B P-MOSFET RDS(on)

at VIN = VINSW3B = 3.3 V

–

215

245

RONSW3BN

SW3B N-MOSFET RDS(on)

at VIN = VINSW3B = 3.3 V

–

258

326

ISW3BPQ

SW3B P-MOSFET Leakage Current

VIN = VINSW3B = 4.5 V

––

7.5

µA

ISW3BPQ

SW3B N-MOSFET Leakage Current

VIN = VINSW3B = 4.5 V

––

2.5

µA

RSW3xDIS

Discharge Resistance

–

600

–

Notes

49.

When output is set to > 2.6 V the output will follow the input down when VIN gets near 2.8 V.

50.

Accuracy specification is inclusive of load and line regulation.

51.

The higher output voltages available depend on the voltage drop in the conduction path as given by the following equation:

(VINSW3x - VSW3x) = ISW3x* (DCR of Inductor +RONSW3xP + PCB trace resistance).

Table 71. SW3A/B electrical characteristics (continued)

All parameters are specified at Consumer TA = -40 to 85 °C and Extended Industrial TA = -40 to 105 °C, VIN = VINSW3x = 3.6 V,

VSW3x = 1.5 V, ISW3x = 100 mA, SW3x_PWRSTG[2:0] = [111], typical external component values, fSW3x = 2.0 MHz, single phase and

independent mode unless, otherwise noted. Typical values are characterized at VIN = VINSW3x = 3.6 V, VSW3x = 1.5 V, ISW3x = 100 mA,

SW3x_PWRSTG[2:0] = [111], and 25 °C, unless otherwise noted.

Symbol

arameter

Min.

Typ.

Max.

Unit

Notes

100

0.1

100

1000

)

Load Current (mA)

PFM - Vout = 1.5V

APS - Vout = 1.5V

PWM - Vout = 1.5V

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