LP3941A Datasheet, PDF (8/32 Pages) National Semiconductor (TI) – Cellular Phone Power Management Unit

V_O4 LDO Electrical Characteristics
Unless otherwise noted, V_IN = V_BATT = 3.6V. Typical values and limits appearing in normal type apply for T_J = 25˚C. Limits ap-
pearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9)
Symbol
Parameter
Condition
Min
Typ
Max
Units
V_OUT
Output Voltage
Accuracy
1 mA ≤ I_OUT ≤ 50 mA, V_OUT = 2.2V
−3
±1.0
+3
%
3.0V ≤ V_BATT = V_IN ≤ 5.5V
V_OUT
Programmable Output Voltage 0 µA ≤ I_OUT ≤ 50 mA
1.5
3.0
3.0
V
Range Range
Programming Resolution = 100 mV
I_OUT
Output Current
V_IN– V_OUT
∆V_OUT
Output Current Limit
Dropout Voltage
Line Regulation
Load Regulation
e_N
Output Noise Voltage
PSRR
Power Supply Ripple
Rejection Ratio
(V_OUT + 0.25V, 3.0V)_MAX ≤ V_BATT
V_BATT = V_IN ≤ 5.5V
V_OUT = 0V
I_OUT = 25 mA
(V_OUT + 0.25V, 3.0V)_MAX ≤ V_BATT
V_BATT = V_IN ≤ 5.5V, I_OUT = 25 mA
V_IN = 3.6V, 1 mA ≤ I_OUT ≤ 50 mA
10 Hz ≤ f ≤ 100 kHz,
C_OUT = 1.0 µF
f = 217 Hz, C_OUT = 1.0 µF
50
mA
140
7
90
mV
3
mV
4
31
27
µV_RMS
56
dB
I_GND
C_OUT
Ground Current
Output Capacitance
Output Capacitor ESR
I_OUT = 100 µA
0 µA ≤ I_OUT ≤ 50 mA
30
µA
1
20
µF
5
500
mΩ
t_START-UP Start-Up Time from Shutdown C_OUT = 1.0 µF, I_OUT = 50 mA (Note
60
µs
10)
V_O5 LDO Electrical Characteristics
Unless otherwise noted, V_IN = V_BATT = 3.6V. Typical values and limits appearing in normal type apply for T_J = 25˚C. Limits ap-
pearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 2, 8, 9)
Symbol
Parameter
Condition
Min
Typ
Max
Units
V_OUT
Output Voltage
Accuracy
1 mA ≤ I_OUT ≤ 50 mA, V_OUT = 2.2V
−3
±1.0
+3
%
3.0V ≤ V_BATT = V_IN ≤ 5.5V
V_OUT
Programmable Output Voltage 0 µA ≤ I_OUT ≤ 50 mA
2.5
2.8
3.2
V
Range Range
Programming Resolution = 100 mV
I_OUT
Output Current
V_IN– V_OUT
∆V_OUT
Output Current Limit
Dropout Voltage
Line Regulation
Load Regulation
e_N
Output Noise Voltage
PSRR
Power Supply Ripple
Rejection Ratio
(V_OUT + 0.25V, 3.0V)_MAX ≤ V_BATT
V_BATT = V_IN ≤ 5.5V
V_OUT = 0V
I_OUT = 25 mA
(V_OUT + 0.25V, 3.0V)_MAX ≤ V_BATT
V_BATT = V_IN ≤ 5.5V, I_OUT = 25 mA
V_IN = 3.6V, 1 mA ≤ I_OUT ≤ 50 mA
10 Hz ≤ f ≤ 100 kHz,
C_OUT = 1.0 µF
f = 217 Hz, C_OUT = 1.0 µF
50
mA
160
7
90
mV
3
mV
4
31
27
µV_RMS
56
dB
I_GND
C_OUT
Ground Current
Output Capacitance
Output Capacitor ESR
I_OUT = 100 µA
0 µA ≤ I_OUT ≤ 50 mA
30
µA
1
20
µF
5
500
mΩ
t_START-UP Start-Up Time from Shutdown C_OUT = 1.0 µF, I_OUT = 50 mA (Note
60
µs
10)
Note: This LDO will be ON after start-up by default.
Note: This LDO has an external active high enable pin, V_O5-EN as well as the internal register enable bit. The LDO is on if either of these is “1” (OR-function). The
enable bit is “1” by default and can be disabled via the register file.
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