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LP3971 数据表(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LP3971
功能描述  POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS
PDF  42 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3971 数据表(HTML) 8 Page - National Semiconductor (TI)

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LDO RTC
Unless otherwise noted, V
IN = 3.6V, CIN = 1.0 µF, COUT = 0.47 µF, COUT (VRTC) = 1.0 µF ceramic. 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, −40˚C to +125˚C. (Notes 2, 6, 7) and (Note 10)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
OUT
Accuracy
Output Voltage Accuracy
V
IN Connected, Load Current =
1mA
2.632
2.8
2.968
V
∆V
OUT
Line Regulation
V
IN =(VOUT nom + 1.0V) to 5.5V
(Note 11) Load Current=1mA
0.15
%/V
Load Regulation
From Main Battery
Load Current=1mAto30mA
0.05
%/mA
From Backup Battery
V
IN = 3.0V
Load Current=1mAto10mA
0.5
I
SC
Short Circuit Current Limit
From Main Battery
V
IN =VOUT +0.3V to 5.5V
100
mA
From Backup Battery
30
V
IN -
V
OUT
Dropout Voltage
Load Current = 10 mA
375
mV
I
Q_Max
Maximum Quiescent Current
I
OUT =0mA
30
µA
TP1
RTC LDO Input Switched from
Main Battery to Backup Battery
V
IN Falling
2.9
V
TP2
RTC LDO Input Switched from
Backup Battery to Main Battery
V
IN Rising
3.0
V
C
O
Output Capacitor
Capacitance for Stability
0.7
1.0
µF
ESR
5
500
m
Ω
www.national.com
8



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