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AS3543 Datasheet(PDF) 32 Page - ams AG

Part # AS3543
Description  High End Stereo Audio Codec wi th System PMU
PDF  92 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3543 Datasheet(HTML) 32 Page - ams AG

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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
o
C, unless otherwise mentioned
Table 20. LDO Parameter
Symbol
Parameter
Condition
Min
Typ
Max
Unit
RON
On resistance
1
PSRR
Power supply rejection ratio
f=1kHz
70
dB
f=100kHz
40
IOFF
Shut down current
100
nA
IVDD
Supply current
without load
50
µA
Noise
Output noise
10Hz < f < 100kHz
50
µVrms
tstart
Startup time
200
µs
Vout_tol
Output voltage tolerance
minimum +/- 50mV
-2.5%
2.5%
mV
VLineReg
Line regulation
LDO2, Static
<1
mV
LDO2, Transient; Slope: tr=10µs
<10
VLoadReg
Load regulation
LDO2, Static
<1
mV
LDO2, Transient; Slope: tr=10µs
<10
ILIMIT
Current limitation
LDO1
100
LDO2, LDO3, LDO4
200
mA
LDO2, LDO3 and LDO4, has to be
enabled via register 18h-1, 18h-2, 18h-3
350



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