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参数资料
| 型号： | LP3918TLX-I |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 封装： | 2.50 X 2.50 MM, MICRO, SMD-25 |
| 文件页数： | 29/30页 |
| 文件大小： | 1271K |
| 代理商： | LP3918TLX-I |
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LDO2 (DIGI) Electrical Characteristics
Unless otherwise noted, V
IN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10F, CLDOX=1F. Note VINMIN is the greater of
3.0V or V
OUT2+ 0.5V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type
apply over the entire junction temperature range for operation, T
Symbol
Parameter
Condition
Typ
Limit
Units
Min
Max
V
OUT2
Output Voltage Accuracy
I
OUT2 = 1mA, VOUT2= 3.0V
2
+2
%
3
+3
Output Voltage
Default
3.0
V
I
OUT2
Output Current
V
INMIN ≤ VIN ≤ 5.5V
300
mA
Output Current Limit
V
OUT2 = 0V
600
V
DO2
Dropout Voltage
I
OUT2 = 300mA (Note 8)
200
280
mV
ΔV
OUT2
Line Regulation
V
INMIN ≤ VIN ≤ 5.5V
2
mV
I
OUT2 = 1mA
Load Regulation
1mA
≤ I
OUT2 ≤ 300mA
20
mV
e
n2
Output Noise Voltage
10Hz
≤ f ≤ 100KHz,
45
V
RMS
C
OUT = 1F
(Note 7)
PSRR
Power Supply Rejection Ratio
F = 10kHz, C
OUT = 1F
65
dB
I
OUT2 = 20mA (Note 7)
t
START-UP
Start-Up Time from Shut-down
C
OUT = 1F, IOUT2 = 300mA
40
60
s
(Note 7)
t
Transient
Start-Up Transient Overshoot
C
OUT = 1F, IOUT2 = 300mA
5
30
mV
(Note 7)
LDO3 (ANA), LDO4 (TCXO) Electrical Characteristics
Unless otherwise noted, V
IN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10F, CLDOX=1F. TCXO_EN high. Note VINMIN
is the greater of 3.0V or V
OUT3/4 + 0.5V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing
in boldface type apply over the entire junction temperature range for operation, T
Symbol
Parameter
Condition
Typ
Limit
Units
Min
Max
V
OUT3, VOUT4
Output Voltage Accuracy
I
OUT3/4 = 1mA, VOUT3/4= 3.0V
2
+2
%
3
+3
Output Voltage
LDO3 default
3.0
V
LDO4 default
3.0
I
OUT3, IOUT4
Output Current
V
INMIN ≤ VIN ≤ 5.5V
80
mA
Output Current Limit
V
OUT3/4 = 0V
160
V
DO3, VDO4
Dropout Voltage
I
OUT3/4 = 80mA (Note 8)
180
220
mV
ΔV
OUT3 ,
ΔV
OUT4
Line Regulation
V
INMIN ≤ VIN ≤ 5.5V
2
mV
I
OUT3/4 = 1mA
Load Regulation
1mA
≤ I
OUT3/4 ≤ 80mA
20
mV
e
n3,en4
Output Noise Voltage
10Hz
≤ f ≤ 100kHz,
45
V
RMS
C
OUT = 1F
(Note 7)
PSRR
Power Supply Rejection Ratio
F = 10kHz, C
OUT = 1F
65
dB
I
OUT3/4 = 20mA (Note 7)
t
START-UP
Start-Up Time from Shut-down
C
OUT = 1F, IOUT3/4 = 80mA
(Note 7)
40
60
s
t
Transient
Start-Up Transient Overshoot
C
OUT = 1F, IOUT3/4 = 80mA
(Note 7)
5
30
mV
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LP3918
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