AS3658 datasheet(82/158 Pages) AMSCO

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AS3658

Data Sheet Confidential - Detail ed Descri ption-Power Management Functions

Figure 32. Analog LDO Block diagram

Table 80. Analog LDO (VRF_1, VRF_2, VRF_3) Characteristics, Vx_IN=4V; ILOAD=150mA; Tamb=25ºC;

CLOAD =2.2µF (Ceramic); unless otherwise specified

Symbol

Parameter

Min

Typ

Max

Unit

Note

Vx_IN

Supply voltage rage

5.5

IOUT

Output current

0150

VRF_2, rf2_lcurr_en=1

VRF_3, rf3_lcurr_en=1

200

VRF_1, rf1_lcurr_en=1

0250

VRF_2, rf2_lcurr_en=0

VRF_3, rf3_lcurr_en=0

400

VRF_1, rf1_lcurr_en=0

RON

On resistance

0.5

VRF_1

VRF_2, VRF_3

PSRR

Power supply rejection

ratio

f=1kHz

f=100kHz

IOFF

Shut down current

100

IVDD

Supply current

µA

without load

Noise

Output noise

µVrms

10Hz < f < 100kHz

tstart

Startup time

200

µs

VRF_1,2,3 are set to low current

during startup time

Vout

Output voltage

1.85

2.85

VRFX_IN>3.0V, VRF_1 @

Iout=300mA, VRF_2 and VRF_3 @

Iout=150mA (X=1,2)

1.85

3.4

VRFX_IN>3.55V, VRF_1 @

Iout=300mA, VRF_2 and VRF_3@

Iout=150mA (X=1,2)

Vout_tol

Output voltage

tolerance

-50

VLineReg

Line regulation

-1

Static

-10

Transient; Slope: tr=10µs

!"#

'() )

)(' +

),-',,

μ.

/.01

00μ.

2)/

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