AS3608 datasheet(13/68 Pages) AMSCO

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AS3608 2v2

Data Sheet - D e t a i l e d D e s c r i p t i o n - P o w e r M anage ment F uncti ons

8.1.2 LDO 1, LDO2, LDO3 & LDO4

These LDOs can be used to generate the periphery voltage for the digital processor or other external components (e.g. ext. DAC, USB-PHY, SD-

Cards, NAND-Flashes, FM-Tuner …). LDO4 is only available on AS3608.

Input Voltage VSUP5 for LDO3 and LDO4, and VSUP4 for LDO2 and LDO1

Output Voltage is PVDD1, PVDD2, PVDD3 & PVDD4 (1.2V to 3.5V)

Default value at start-up is defined by the boot ROM, when the boot ROM is not programmed the LDOs will not start-up

Driver strength: 160mA, can be programmed to 270mA

8.1.3 Parameter

VSUPx=3.6V, TA= 25ºC, unless otherwise specified.

Table 4. LDO Parameter

Symbol

Parameter

Condition

Min

Typ

Max

Unit

RON

On resistance

PSRR

Power supply rejection ratio

f=1kHz

f=100kHz

IOFF

Shut down current

100

IVDD

Supply current

without load

μA

low power enabled, without load

μA

Noise

Output noise

10Hz < f < 100kHz

µVrms

tstart

Startup time

200

µs

Vout_tol

Output voltage tolerance

minimum ±50mV

-2.5%

2.5%

VLineReg

Line regulation

Static

Transient; Slope: tr=10µs

<10

VLoadReg

Load regulation

Static

Transient; Slope: tr=10µs

<10

ILIMIT

Current limitation

default

200

has to be enabled via register

370

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