WM8326 Datasheet, PDF (18/255 Pages) Wolfson Microelectronics plc – Processor Power Management Subsystem

WM8326
Production Data
7.2 LDO REGULATORS
LDO1
Unless otherwise noted: V_IN = 3.8V, V_OUT = 1.8V, T_J = -40°C to +125°C; Typical values are at T_J = +25ºC
PARAMETER SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
Input Voltage
Programmable
Output Voltage
V_IN
V_OUT
1.5
5.5
0.9
3.3
V_OUT Step Size
Output Current
V_{OUT_STEP}
I_OUT
V_OUT = 0.9V to 1.6V
V_OUT = 1.7V to 3.3V
Normal mode
Low power mode, LDOn_LP_MODE=0
50
100
0
300
0
50
Low power mode, LDOn_LP_MODE=1
0
20
V_OUT Accuracy
Line Regulation
Load Regulation
Dropout Voltage
Undervoltage
level
V_{OUT_ACC}
V_{OUT LINE}
V_{OUT LOAD}
V_IN - V_OUT
V_OUT
I_LOAD = 1mA
V_IN = (V_OUT + 0.5) to 5.5V, I_LOAD = 150mA
Note that V_IN must be >= 1.5V
I_LOAD =1mA to 300mA
I_LOAD =150mA, V_OUT > 2.7V
I_LOAD =150mA, V_OUT 1.8V to 2.7V
I_LOAD =150mA, V_OUT < 1.8V
V_OUT Falling
-3
+3
0.1
0.011
250
300
500
88
Quiescent
I_Q
Normal mode, no load
30
Current
Low power mode, LDOn_LP_MODE=0, no load
10
Low power mode, LDOn_LP_MODE=1, no load
5
Power Supply
Rejection Ratio
PSRR
I_LOAD = 1mA to 300mA
I_LOAD = 150mA, <= 1kHz
I_LOAD = 150mA, 10kHz
I_Q (no load) + 1% of load
53
53
I_LOAD = 150mA, 100kHz
32
On Resistance
R_DSON
V_IN = 1.5V, I_LOAD = 100mA
1.5
(Switch mode)
V_IN = 1.8V, I_LOAD = 100mA
1.2
Current Limit
(Switch mode)
V_IN = 2.5V, I_LOAD = 100mA
V_IN = 3.3V, I_LOAD = 100mA
I_CL
V_OUT = 0V
0.85
0.7
600
Start-up time
Shutdown time
t_{start_up}
t_{shut_down}
No load, Output cap 2.2 µF, 90% of V_OUT
No load, Output cap 2.2 µF, 10% of V_OUT
10
10
UNIT
V
V
mV
mA
%
%/V
%/mA
mV
%
A
dB

mA
s
ms
LDO2, LDO3
Unless otherwise noted: V_IN = 3.8V, V_OUT = 1.8V, T_J = -40°C to +125°C; Typical values are at T_J = +25ºC
PARAMETER SYMBOL
TEST CONDITIONS
MIN
TYP
Input Voltage
V_IN
1.5
Programmable
Output Voltage
V_OUT
0.9
V_OUT Step Size
V_{OUT_STEP} VOUT = 0.9V to 1.6V
50
V_OUT = 1.7V to 3.3V
100
Output Current
I_OUT
Normal mode
0
Low power mode, LDOn_LP_MODE=0
0
Low power mode, LDOn_LP_MODE=1
0
V_OUT Accuracy
V_{OUT_ACC}
I_LOAD = 1mA
-3
Line Regulation
V_{OUT LINE}
V_IN = (V_OUT + 0.5) to 5.5V, I_LOAD = 100mA
Note that V_IN must be >= 1.5V
0.1
Load Regulation V_{OUT LOAD} I_LOAD =1mA to 200mA
0.011
MAX
5.5
3.3
200
50
20
+3
UNIT
V
V
mV
mA
%
%/V
%/mA
w
PD, June 2012, Rev 4.0
18