LP3921 Datasheet, PDF (9/34 Pages) National Semiconductor (TI) – Battery Charger Management and Regulator Unit with Integrated Boomer® Audio Amplifier

LDO2 (DIGI) Electrical Characteristics
Unless otherwise noted, V_IN (=VIN1=VIN2=BATT=VDD) = 3.6V, GND = 0V, C_VIN1-2=10 µF, C_LDOX=1 µF. Note V_INMIN is the greater
of 3.0V or V_OUT2+ 0.5V. Typical values and limits appearing in normal type apply for T_J = 25°C. Limits appearing in boldface type
apply over the entire junction temperature range for operation, T_A = T_J = −40°C to +125°C. (Note 6)
Symbol
Parameter
Condition
Limit
Typ
Units
Min
Max
V_OUT2
Output Voltage Accuracy I_OUT2 = 1 mA, V_OUT2= 3.0V
−2
+2
%
−3
+3
Output Voltage
Default
3
V
I_OUT2
Output Current
V_INMIN ≤ V_IN ≤ 5.5V
Output Current Limit
V_OUT2 = 0V
600
V_DO2
Dropout Voltage
I_OUT2 = 300 mA (Note 8)
220
ΔV_OUT2
Line Regulation
V_INMIN ≤ V_IN ≤ 5.5V
2
I_OUT2 = 1mA
Load Regulation
1 mA ≤ I_OUT2 ≤ 300 mA
10
e_n2
Output Noise Voltage
10 Hz ≤ f ≤ 100 kHz,
45
C_OUT = 1 µF (Note 7)
PSRR
Power Supply Rejection F = 10 kHz, C_OUT = 1 µF
65
Ratio
I_OUT2 = 20 mA (Note 7)
t_START-UP
Start-Up Time from
C_OUT = 1 µF, I_OUT2 = 300 mA (Note 7)
40
Shutdown
300
mA
310
mV
mV
mV
µV_RMS
dB
60
µs
t_Transient
Start-Up Transient
C_OUT = 1 µF, I_OUT2 = 300 mA (Note 7)
5
Overshoot
30
mV
LDO3 (ANA), LDO4 (TCXO) Electrical Characteristics
Unless otherwise noted, V_IN (=VIN1=VIN2=BATT=VDD) = 3.6V, GND = 0V, C_VIN1-2=10 µF, C_LDOX=1 µF. TCXO_EN high. Note
V_INMIN is the greater of 3.0V or V_OUT3/4 + 0.5V. Typical values and limits appearing in normal type apply for T_J = 25°C. Limits
appearing in boldface type apply over the entire junction temperature range for operation, T_A = T_J = −40°C to +125°C. (Note 6)
Symbol
Parameter
Condition
Limit
Typ
Units
Min
Max
V_OUT3, V_OUT4 Output Voltage Accuracy I_OUT3/4 = 1 mA, V_OUT3/4= 3.0V
−2
+2
%
−3
+3
Output Voltage
LDO3 default
3
V
LDO4 default
3
I_OUT3, I_OUT4 Output Current
V_INMIN ≤ V_IN ≤ 5.5V
Output Current Limit
V_OUT3/4 = 0V
160
V_DO3, V_DO4 Dropout Voltage
I_OUT3/4 = 80 mA (Note 8)
220
ΔV_OUT3 ,
Line Regulation
V_INMIN ≤ V_IN ≤ 5.5V
2
ΔV_OUT4
I_OUT3/4 = 1 mA
Load Regulation
1mA ≤ I_OUT3/4 ≤ 80 mA
5
e_n3,e_n4
Output Noise Voltage
10 Hz ≤ f ≤ 100 kHz,
45
C_OUT = 1 µF (Note 7)
PSRR
Power Supply Rejection F = 10 kHz, C_OUT = 1 µF
65
Ratio
I_OUT3/4 = 20 mA (Note 7)
t_START-UP
Start-Up Time from Enable C_OUT = 1 µF, I_OUT3/4 = 80mA
40
(Note 7)
80
mA
310
mV
mV
mV
µV_RMS
dB
60
µs
t_Transient
Start-Up Transient
C_OUT = 1µF, I_OUT3/4 = 80 mA
5
Overshoot
(Note 7)
30
mV
9
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