WM8321 Datasheet, PDF (19/253 Pages) Wolfson Microelectronics plc – Processor Power Management Subsystem

Production Data
PARAMETER
(Switch mode)
Current Limit
(Switch mode)
Start-up time
Shutdown time
SYMBOL
I_CL
TEST CONDITIONS
V_IN = 1.8V, I_LOAD = 100mA
V_IN = 2.5V, I_LOAD = 100mA
V_IN = 3.3V, I_LOAD = 100mA
V_OUT = 0V
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
WM8321
MIN
TYP
MAX
UNIT
1.2
0.85
0.7
400
mA
10
s
10
ms
LDO4, LDO5, LDO6
Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, TJ = -40°C to +125°C; Typical values are at TJ = +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
VOUT Step Size
VOUT_STEP VOUT = 0.9V to 1.6V
50
VOUT = 1.7V to 3.3V
100
Output Current
IOUT
Normal mode
0
100
Low power mode, LDOn_LP_MODE=0
0
50
Low power mode, LDOn_LP_MODE=1
0
20
V_OUT Accuracy
Line Regulation
V_{OUT_ACC}
V_{OUT LINE}
I_LOAD = 1mA
V_IN = (V_OUT + 0.5) to 5.5V, I_LOAD = 50mA
Note that VIN must be >= 1.5V
-3
+3
0.1
Load Regulation
Dropout Voltage
VOUT LOAD
V_IN - V_OUT
ILOAD =1mA to 100mA
I_LOAD =100mA, V_OUT > 2.7V
0.022
200
I_LOAD =100mA, V_OUT 1.8V to 2.7V
250
I_LOAD =100mA, V_OUT < 1.8V
400
Undervoltage
level
V_OUT
V_OUT Falling
88
Quiescent
IQ
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 100mA
ILOAD = 50mA, <= 1kHz
ILOAD = 50mA, 10kHz
I_Q (no load) + 1% of load
55
55
ILOAD = 50mA, 100kHz
32
On Resistance
RDSON
V_IN = 1.5V, I_LOAD = 100mA
3.2
(Switch mode)
V_IN = 1.8V, I_LOAD = 100mA
2.1
V_IN = 2.5V, I_LOAD = 100mA
1.35
V_IN = 3.3V, I_LOAD = 100mA
1.1
Current Limit
I_CL
V_OUT = 0V
230
(Switch mode)
Start-up time
Shutdown time
tstart_up
tshut_down
No load, Output cap 2.2 µF, 90% of VOUT
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
LDO7, LDO8
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
VIN
1.71
Programmable
Output Voltage
VOUT
1.0
V_OUT Step Size
V_{OUT_STEP} VOUT = 1.0V to 1.6V
50
V_OUT = 1.7V to 3.5V
100
Output Current
I_OUT
Normal mode
0
MAX
5.5
3.5
200
UNIT
V
V
mV
mA
w
PD, February 2012, Rev 4.0
19