Rainbow-electronics ATR0635P1 Manuel d'utilisateur télécharger pdf (Page 23)

4979D–GPS–06/08

ATR0635P1

Figure 4-3. Connecting Example: Separate Power Supplies for RF and Digital Part Using 1.8V from Host System

ATR0635P1 internal

VDDUSB0V or 3V to 3.6V

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

VCC1

VCC2

VBP

VDIG

2.7V to 3.3V

2.3V to 3.6V

1 µF

(X7R)

1.65V to 1.95V

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Rainbow-electronics ATR0635P1 Manuel d'utilisateur Page 23