MMPF0100NPEP datasheet(129/137 Pages) FREESCALE

No de pièce	MMPF0100NPEP

Description	Four to six buck converters, depending on configuration

PDF	137 Pages

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Fabricant	FREESCALE [Freescale Semiconductor, Inc]

Site Internet	http://www.freescale.com

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Analog Integrated Circuit Device Data



Freescale Semiconductor

129

PF0100

Typical Applications

PF0100 Layout Guidelines

7.2.5

Switching Regulator Layout Recommendations

1. Per design, the switching regulators in PF0100 are designed to operate with only one input bulk capacitor. However, it is

recommended to add a high frequency filter input capacitor (CIN_hf), to filter out any noise at the regulator input. This

capacitor should be in the range of 100 nF and should be placed right next to or under the IC, closest to the IC pins.

2. Make high-current ripple traces low-inductance (short, high W/L ratio).

3. Make high-current traces wide or copper islands.

4. Make high-current traces symetrical for dual–phase regulators (SW1, SW3).

Figure 31. Generic Buck Regulator Architecture

Figure 32. Recommended Layout for Buck Regulators

Diver Controller

SWxIN

SWxLX

SWxFB

COUT

CIN

SWx

VIN

Compensation

CIN_HF

SWxIN

Inductor

CIN

COUT

CIN_HF

SWxLX

GND

SWxFB

MMPF0100NPEP Fiches technique(PDF) 129 Page - Freescale Semiconductor, Inc