LP3921 Datasheet, PDF (9/41 Pages) National Semiconductor (TI) – Battery Charger Management and Regulator Unit with Integrated Boomer® Audio Amplifier

LP3921
www.ti.com
SNVS580A – AUGUST 2008 – REVISED MAY 2013
LDO1 (CORE) Electrical Characteristics (continued)
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_OUT1+ 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. ⁽¹⁾
Symbol
Parameter
Condition
Limit
Typ
Units
Min
Max
I_OUT1
Output Current
V_INMIN ≤ V_IN ≤ 5.5V
Output Current Limit V_OUT1 = 0V
600
V_DO1
Dropout Voltage
I_OUT1 = 300 mA ⁽²⁾
220
ΔV_OUT1
Line Regulation
V_INMIN ≤ V_IN ≤ 5.5V
2
I_OUT1 = 1 mA
Load Regulation
1 mA≤ I_OUT1 ≤ 300 mA
10
e_n1
Output Noise Voltage 10 Hz≤ f≤ 100 kHz,
45
C_OUT = 1 µF ⁽³⁾
PSRR
Power Supply
F = 10 kHz, C_OUT = 1 µF
65
Rejection Ratio
I_OUT1 = 20 mA ⁽³⁾
t_START-UP
Start-Up Time from C_OUT = 1 µF, I_OUT1 = 300 mA
60
Internal Enable
(4)
300
mA
310
mV
mV
mV
µV_RMS
dB
170
µs
T_Transient
Start-Up Transient C_OUT = 1 µF,
60
Overshoot
I_OUT1 = 300 mA ⁽³⁾
120
mV
(2) Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
specification does not apply in cases it implies operation with an input voltage below the 3.0V minimum appearing under Operating
Ratings. For example, this specification does not apply for devices having 1.5V outputs because the specification would imply operation
with an input voltage at or about 1.5V.
(3) Specified by design.
(4) Specified by design.
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. ⁽¹⁾
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 ⁽²⁾
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 ⁽³⁾
PSRR
Power Supply
F = 10 kHz, C_OUT = 1 µF
65
Rejection Ratio
I_OUT2 = 20 mA ⁽³⁾
300
mA
310
mV
mV
mV
µV_RMS
dB
(1) All limits are verified. All electrical characteristics having room-temperature limits are tested during production with T_J = 25°C. All hot and
cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process
control.
(2) Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
specification does not apply in cases it implies operation with an input voltage below the 3.0V minimum appearing under Operating
Ratings. For example, this specification does not apply for devices having 1.5V outputs because the specification would imply operation
with an input voltage at or about 1.5V.
(3) Specified by design.
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