AS3543-ECTP datasheet(32/92 Pages) AMSCO

32 / 92 page

www.austriamicrosystems.com

Revision 1.11

31 - 91

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

9.1.4

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 …)

LDO3 has a separate input pin (BVDDP1) which can be connected to either the battery or a DCDC converter output.

Input Voltage BVDDP1 or BVDD

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

Default value at start-up is defined by VPRG2 pin

Driver strength: 100mA, can be programmed to 200mA

9.1.5

Parameter

BVDD=3.6V, TA= 25

C, unless otherwise mentioned

Table 20. 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

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

LDO2, Static

LDO2, Transient; Slope: tr=10µs

<10

VLoadReg

Load regulation

LDO2, Static

LDO2, Transient; Slope: tr=10µs

<10

ILIMIT

Current limitation

LDO1

100

LDO2, LDO3, LDO4

200

LDO2, LDO3 and LDO4, has to be

enabled via register 18h-1, 18h-2, 18h-3

350

AS3543-ECTP датащи(PDF) 32 Page - ams AG

AS3543-ECTP датащи(HTML) 32 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

датащи скачать

ссылки URL