Production Data
WM8321
PARAMETER
SYMBOL
TEST CONDITIONS
ILOAD = 75mA, 100kHz
MIN
TYP
49
MAX
UNIT
Output noise
voltage
f=10Hz to 100kHz; VOUT=2.8V, ILOAD = 1mA
f=10Hz to 100kHz; VOUT=2.8V, ILOAD = 10mA
f=10Hz to 100kHz; VOUT=2.8V, ILOAD = 100mA
VOUT
30
VRMS
m
32
32
On Resistance
(Switch mode)
RDSON
VIN = 1.71V, ILOAD = 100mA
1000
930
610
430
250
VIN = 1.8V, ILOAD = 100mA
VIN = 2.5V, ILOAD = 100mA
VIN = 3.5V, ILOAD = 100mA
Current Limit
VOUT = 0V
ICL
mA
(Switch mode)
Start-up time
No load, Output cap 4.7 µF, 90% of VOUT
No load, Output cap 4.7 µF, 10% of VOUT
tstart_up
70
s
Shutdown time
tshut_down
10
ms
LDO11
Unless otherwise noted: VIN = 3.8V, VOUT = 1.2V, TJ = -40°C to +125°C; Typical values are at TJ = +25ºC
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Programmable
Output Voltage
VOUT
0.8
1.55
V
VOUT Step Size
Output Current
VOUT_STEP
IOUT
50
mV
mA
PVDD < 3.1V
0
0
10
25
+4
PVDD ≥ 3.1V
VOUT Accuracy
Line Regulation
Load Regulation
V
IN = 2.7 to 5.5V ; ILOAD = 100µA
IN = 2.7 to 5.5V; ILOAD = 1mA
VOUT
VOUT LINE
VOUT LOAD
IQ
-4
%
%/V
%/mA
A
V
0.4
0.2
2.5
I
LOAD = 100µA to 10mA
Quiescent
Current
No load
Start-up time
No load, Output cap 0.1 µF, 90% of VOUT
No load, Output cap 0.1 µF, 10% of VOUT
tstart_up
0.3
0.3
1
1
ms
ms
Shutdown time
tshut_down
PD, February 2012, Rev 4.0
21
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
