FAN5068 Datasheet, PDF(3/18 Page) Fairchild Semiconductor – DDR-1/DDR-2 plus ACPI Regulator Combo

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FAN5068 Datasheet, PDF (3/18 Pages) Fairchild Semiconductor – DDR-1/DDR-2 plus ACPI Regulator Combo

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FAN5068

Table 1. BOM for Figure 1 (continued)

Description

Qty Ref.

MOSFET N-CH, 6mâ¦, 30V, 75A, D-PAK, FSID:

FDD6606

1 Q2

MOSFET N-CH, 32mâ¦, 20V, 21A, D-PAK, FSID: 3 Q3, Q6,

FDD6530A

MOSFET P-CH, 35mâ¦, -20V, -5.5A, SSOT-6,

FSID: FDC602P

1 Q4

Resistor 1.82kâ¦, 1%, 0805

4 R1, R2,

R9, R10

Resistor 56kâ¦, 1%, 0805

1 R5

Resistor 60.4kâ¦, 1%, 0805

1 R6

Resistor 3.01kâ¦, 1%, 0603

1 R7

Resistor 9.09kâ¦, 1%, 0603

1 R8

Resistor 10kâ¦, 1%, 0805

1 R4

Resistor 1kâ¦, 1%, 0805

1 R3

IC System Regulator, MLP 24-Pin 5X5mm

1 U2

PRODUCT SPECIFICATION

Vendor

Fairchild

Yageo

Any

Part Number

FDD6606

FDD6530A

FDC602P

9C08052A1821FKHFT

Any

Fairchild

FAN5068

Bypass Capacitor Notes:

Input capacitor C1 is typically chosen based on the ripple

current requirements. COUT is typically selected based on

both current ripple rating and ESR requirement. See AN-

6006 for these calculations.

C17 and C12 selection will be largely determined by ESR

and load transient response requirements. In each case, the

number of capacitors required depends on the capacitor tech-

nology chosen. Oscons can meet the requirements with less

space, but higher cost than using low ESR electrolytics (like

Rubycon MBZ).

POR/UVLO

VIN

COMP

OSC

CLK

RAMP

PWM

4.41K

PGOOD

VDDQ IN

Reference and

Soft Start

VREF

OVP

ADAPTIVE

GATE

CONTROL LOGIC

PWM

VDD

S/H

RAMP

ISNS

ILIM det.

CURRENT PROCESSING

ILIM

BOOT

CBOOT

VIN

HDRV

LDRV

VDDQ

L OUT

COUT

PGND

ISNS RSENSE

Figure 2. PWM Modulator Block Diagram

REV. 1.0.1 9/9/04

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