LP3923_15 Datasheet, PDF (11/37 Pages) Texas Instruments – Cellular Phone Power Management Unit

LP3923
www.ti.com
SNVS567B – APRIL 2010 – REVISED MAY 2013
LDO5, LDO6, LDO7 (A-Type) Electrical Characteristics (continued)
Unless otherwise noted, V_IN=VIN2=BATT=3.6V, GND = 0V, C_V!N1-2 = 10 µF, C_LDOx= 1 µF, RX_EN, TX_EN high. Note V_INMIN is
the greater of 3.0V or V_OUT +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
Conditions
Typical
Limit
Min
Max
Units
t_START-UP
T_Transient
Start-Up Time from Shut-down C_OUT = 1 µF, I_OUT = 150 mA⁽²⁾
Start-Up Transient Overshoot C_OUT = 1 µF, I_OUT = 150 mA⁽²⁾
35
µs
30
mV
LDO8 (D-Type) Electrical Characteristics
Unless otherwise noted, V_IN=VIN2=BATT=3.6V, GND = 0V, C_V!N1-2 = 10 µF, C_LDOx= 1 µF. Note V_INMIN is the greater of 3.0V or
V_OUT +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
Conditions
Typical
Limit
Min
Max
Units
V_OUT
Output Voltage Accuracy
I_OUT = 1 mA, V_OUT = 3.0V
−2
+2
%
−3
+3
Default Output Voltage
3.0
V
I_OUT
V_DO
ΔV_OUT
e_N
PSRR
t_START-UP
T_Transient
Output Current
V_INMIN ≤ V_IN ≤ 5.5V
Output Current Limit
V_OUT = 0V
400
Dropout Voltage
I_OUT = 150 mA ^{(2) (3)}
125
Line Regulation
V_INMIN ≤ V_IN ≤ 5.5V, I_OUT = 1 mA
2
Load Regulation
1 mA ≤ I_OUT ≤ 150 mA
5
Output Noise Voltage
10 Hz ≤ f ≤ 100 kHz, C_OUT = 1 µF⁽²⁾
35
Power Supply Ripple Rejection F = 10 kHz, C_OUT = 1 µF, I_OUT = 20 mA ⁽²⁾
Ratio
60
Start-Up Time from Shut-down C_OUT = 1 µF, I_OUT = 150 mA⁽²⁾
35
Start-Up Transient Overshoot C_OUT = 1 µF, I_OUT = 150 mA⁽²⁾
150
mA
140
mV
mV
µV_RMS
dB
µs
30
mV
(1) All limits are specified. All electrical characteristics having room-temperature limits are tested during production with T_J = 25°C. All hot
and cold limits are ensured by correlating the electrical characteristics to process and temperature variations and applying statistical
process control.
(2) Ensured by design.
(3) 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 2.5V 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.
Buck Converter Electrical Characteristics
Unless otherwise noted, VIN = VINB = 3.6V, GND = 0V, C_VINB = 10 µF. 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⁾⁽²⁾
Symbol
Parameter
Conditions
Limit
Typ
Units
Min
Max
V_FB
V_OUT,PWM
Feedback Voltage (BUCK) 3.0V ≤V_IN≤ 5.5V
0.5
0.485
0.515
V
Output Voltage
3.0V ≤V_IN≤ 5.5V, I_OUT = 150mA
External resistor divider
accuracy not considered.
1.8
1.746
1.854
V
R_FB1=390kΩ R_FB2=150kΩ ⁽³⁾
(1) All limits are specified. All electrical characteristics having room-temperature limits are tested during production with T_J = 25°C. All hot
and cold limits are ensured by correlating the electrical characteristics to process and temperature variations and applying statistical
process control.
(2) Buck output voltage accuracy depends on the accuracy of the external feedback resistors. Resistor values should be chosen for the
divider network to ensure that at the desired output voltage the FB pin is at the specified value of 0.5V. See Buck Converter Application
Information.
(3) Ensured by design.
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