Production Data
WM8352
9.3 LDO REGULATORS
LDO1 LOAD REGULATION
3.09
3.08
3.07
3.06
3.05
3.04
3.03
3.02
3.01
3
IOUT
VOUT
VIN = 3.7V
LDO1 VIN = 3 .7V, VOUT = 2.5V Load Step 0A to 0.05A
0
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15
IOUT (A)
Figure 10 LDO1 Output Voltage Versus Output Current
Figure 11 LDO1 Load Transient Response
80
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
70
IOUT = 0.005A
60
IOUT = 0.025A
50
40
30
20
10
0
IOUT = 0.1A
VIN - VOUT = 1V
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
100
1000
10000
100000
Load Current (mA)
Frequency (Hz)
Figure 13 Power Supply Ripple Rejection versus
Frequency 217Hz GSM to 100kHz
Figure 12 LDO1 Output Noise versus Output Current
PD, February 2011, Rev 4.4
31
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
