34717(2007) 查看數據表（PDF） - Freescale Semiconductor

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产品描述 (功能)

生产厂家

34717
(Rev.:2007)

5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply

Freescale Semiconductor 

INTERNAL BLOCK DIAGRAM

INTERNAL BLOCK DIAGRAM

PG

FREQ

ILIM1

BOOT1

PVIN1

SW1

PGND1

COMP1

INV1

VOUT1

SD

System

M1

Reset

Oscillator

Buck

Control

FSW

Logic

ISENSE2

ISENSE1

ILIM2

Current

Monitoring

ILIM1

System

Control

Thermal

Monitoring

VBG

Bandgap

Regulator

Discharge

Internal

Voltage

Regulator

M2

VIN

M4

Gate

ISENSE Driver

FSW

M5

Error

Amplifier

PWM

Comparator

Ramp

Generator

VBG

M8

Discharge

M3

VIN

M6

FSW

Gate

Driver

ISENSE

M7

PWM

Comparator

Ramp

Generator

Error

Amplifier

Reference

Selection

VBG

M9

Discharge

GND

CHANNEL 1

CHANNEL 2

VDDI

VIN

ILIM2

BOOT2

PVIN2

SW2

PGND2

COMP2

INV2

VOUT2

VREFIN

Figure 2. 34717 Simplified Internal Block Diagram

34717

2

Analog Integrated Circuit Device Data

Freescale Semiconductor

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