AS3543 datasheet(36/92 Pages) AMSCO

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AS3543 3v2

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 a n a g e m e n t F u n c t i o n s

9.2.3

Parameter

BVDD=3.6, TA= 25

C, unless otherwise mentioned

Figure 24. DCDC Step-down Performance Characteristics

Table 22. DCDC Parameter

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VIN

Input voltage

BVDD

2.7

5.5

VOUT

Regulated output voltage

0.65

3.4

VOUT_tol

Output voltage tolerance

minimum +/- 50mV

-3%

Iload

Maximum Load current

250

ILIMIT

Current limit

450

RPSW

P-Switch ON resistance

BVDD=3.0V

0.5

0.7

RNSW

N-Switch ON resistance

BVDD=3.0V

0.5

0.7

fSW

Switching frequency

depending on DCDC_Cntr settings

1/2

MHz

fSWsc

Switching frequency

in shortcut case

0.6

MHz

Cout

Output capacitor

Ceramic, +/- 10% tolerance

µF

Inductor

+/- 10% tolerance

2.2

4.7

µH

ηeff

Efficiency

Iout=100mA, Vout=3.0V

IVDD

Current consumption

Operating current without load

Low power mode current

Shutdown current

220

100

0.1

µA

tMIN_ON

Minimum on time

tMIN_OFF

Minimum off time

VLineReg

Line regulation

Static

Transient; Slope: tr=10µs, 100mV step,

200mA load

VLoadReg

Load regulation

Static

Transient; Slope: tr=10µs,

100mA step

Efficiency vs. Output Current

100

0,1

100

1000

OUTPUT CURRENT [mA]

VIN=3.6V

VOUT=3.0V

VOUT=1.8V

VOUT=1.2V

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