AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.3.5 LDO4
This LDO will be used to supply the digital processor periphery (vdd_peri). Default value is 3.11V, but it can be manually programmed to 2.94V if
needed.
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•
•
•
Input Voltage BVDD
Output Voltage is IOVDD (3.11 or 2.94)
Programmable via IOVDDp bit.
Driver strength: 200mA
7.4.3.6 LDO6
This LDO will be used to supply the USB 2.0 OTG interface block.
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•
•
•
Input Voltage BVDD
Output Voltage is UVDD (3.26V)
separate enable bit in USB_UTIL register (0x17)
Driver strength: 200mA
7.4.3.7 Parameter
Table 102 LDOs Block Characteristics
Symbol
RON
Parameter
On resistance
Notes
Min
Typ
Max Unit
1
Ω
PSRR
Power supply rejection ratio
f=1kHz
70
40
dB
f=100kHz
IOFF
Shut down current
Supply current
Output noise
100
50
nA
μA
μVrms
μs
IVDD
Noise
tstart
Vout
without load
10Hz < f < 100kHz
50
Startup time
200
2.85
3.56
Output voltage
Vbat>3.0V
1.7
1.7
V
full prog. range
LDO1, LDO2
V
2.9
V
Vout_tol
Output voltage tolerance
Line regulation
-50
-1
50
1
mV
mV
VLineReg
LDO1, Static
LDO1, Transient; Slope: tr=10μs
LDO1, Static
-10
-1
10
1
VLoadReg
Load regulation
mV
mA
LDO1, Transient; Slope: tr=10μs
LDO1, LDO2, LDO3, LDO4
-10
10
ILIMIT
Current limitation
400
BVDD=4V; ILOAD=150mA; Tamb=25ºC; CLOAD =2.2μF (Ceramic); unless otherwise specified
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