33997 データシートの表示（PDF） - Freescale Semiconductor

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33997

Switching Power Supply with Linear Regulators

Freescale Semiconductor 

Freescale Semiconductor, Inc.

VPW R

KA_VPW R

5.0 V VRE F1

5.0 V VRE F2

339 97

I -lim

D r iv e

S oft

Start

Enb

O sc

Logic

&

Latch

Ramp

V bg

Retry

VREF1

Reg.

B andgap

Voltage

Vbg

S nsenb Reference

Retry

VREF2

Reg.

Sns e nb

Sn senb

En able

Co ntrol E nb

Enb

3.3V

Lin ear

Re gulat or

D r i ver

POR

Enb

Vbg

3.3V

S ta ndb y

R eg .

Charge

Pump

PwrOK

Vk am OK

VSW

5.0 V

FBKB

VSUM

VDD H

DR VL

FBL

3.3 V

V KAM

3.3 V

PWROK

VKAMOK

CR ES

SNSEN

EN

GND

Figure 1. 33997 Simplified Block Diagram

33997

2

For More Information OMnOTTOhRiOsLAPrAoNdALuOcGt,INTEGRATED CIRCUIT DEVICE DATA

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