Rainbow Electronics ATR0635P1 User Manual

Page 24

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24

4979D–GPS–06/08

ATR0635P1

Figure 4-4.

Connecting Example: Power Supply from USB Using the Internal LDOs

ATR0635P1 internal

VDDUSB

1.5V to 3.6V

ldoout

ldoen

ldoin

LDO18

LDO_IN

1 µF
(X7R)

VDDIO

LDO_EN

VDD18

LDO_OUT

USB SM and

transceiver

1.8V to 3.3V

variable I/O domain

RTC

backup memory

Core

vbat18

vbat

VDD

ldobat_in

LDOBAT

LDOBAT_IN

VBAT

VBAT18

RF

VCC1

VCC2

VBP

VDIG

1 µF
(X7R)

NSHDN

External LDO

3.0V to 3.3V

USB-VSB 5V

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