WM8326
Production Data
7.2 LDO REGULATORS
LDO1
Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, TJ = -40°C to +125°C; Typical values are at TJ = +25ºC
PARAMETER
SYMBOL
VIN
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage
1.5
5.5
V
Programmable
Output Voltage
VOUT
0.9
3.3
V
VOUT Step Size
VOUT = 0.9V to 1.6V
VOUT_STEP
50
mV
VOUT = 1.7V to 3.3V
100
Output Current
Normal mode
IOUT
0
0
300
50
mA
Low power mode, LDOn_LP_MODE=0
Low power mode, LDOn_LP_MODE=1
0
20
VOUT Accuracy
Line Regulation
I
LOAD = 1mA
IN = (VOUT + 0.5) to 5.5V, ILOAD = 150mA
Note that VIN must be >= 1.5V
VOUT_ACC
VOUT LINE
-3
+3
%
V
0.1
%/V
Load Regulation
Dropout Voltage
I
I
LOAD =1mA to 300mA
VOUT LOAD
VIN - VOUT
0.011
250
%/mA
mV
LOAD =150mA, VOUT > 2.7V
ILOAD =150mA, VOUT 1.8V to 2.7V
ILOAD =150mA, VOUT < 1.8V
300
500
Undervoltage
level
VOUT Falling
VOUT
IQ
88
%
Quiescent
Current
Normal mode, no load
30
10
5
A
Low power mode, LDOn_LP_MODE=0, no load
Low power mode, LDOn_LP_MODE=1, no load
ILOAD = 1mA to 300mA
IQ (no load) + 1% of load
Power Supply
Rejection Ratio
ILOAD = 150mA, <= 1kHz
PSRR
RDSON
53
53
dB
ILOAD = 150mA, 10kHz
ILOAD = 150mA, 100kHz
32
On Resistance
(Switch mode)
VIN = 1.5V, ILOAD = 100mA
1.5
1.2
0.85
0.7
600
VIN = 1.8V, ILOAD = 100mA
VIN = 2.5V, ILOAD = 100mA
VIN = 3.3V, ILOAD = 100mA
Current Limit
VOUT = 0V
ICL
mA
(Switch mode)
Start-up time
No load, Output cap 2.2 µF, 90% of VOUT
No load, Output cap 2.2 µF, 10% of VOUT
tstart_up
10
s
Shutdown time
tshut_down
10
ms
LDO2, LDO3
Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, TJ = -40°C to +125°C; Typical values are at TJ = +25ºC
PARAMETER
SYMBOL
VIN
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage
1.5
5.5
V
Programmable
Output Voltage
VOUT
0.9
3.3
V
VOUT Step Size
VOUT = 0.9V to 1.6V
VOUT_STEP
50
mV
VOUT = 1.7V to 3.3V
100
Output Current
Normal mode
IOUT
0
0
200
50
mA
Low power mode, LDOn_LP_MODE=0
Low power mode, LDOn_LP_MODE=1
0
20
VOUT Accuracy
Line Regulation
I
LOAD = 1mA
IN = (VOUT + 0.5) to 5.5V, ILOAD = 100mA
Note that VIN must be >= 1.5V
ILOAD =1mA to 200mA
VOUT_ACC
VOUT LINE
-3
+3
%
V
0.1
%/V
Load Regulation
VOUT LOAD
0.011
%/mA
PD, June 2012, Rev 4.0
18
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
