LP3987
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1µF, CBP = 22nF, TA = 25° C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Quiescent Current
Dropout Voltage
Line Regulation
Load Regulation
Standby Current
EN Input Bias Current
Logic-Low
EN Threshold
Voltage
Logic-High
Voltage
Output Noise Voltage
Power Supply
f = 100Hz
V
IH
e
NO
PSRR
V
IN
= 3V to 5.5V, Start-Up
10Hz to 100kHz, I
OUT
=
200mA C
OUT
= 1µF
Symbol
ΔV
OUT
I
LIM
I
Q
V
DROP
ΔV
LINE
ΔV
LOAD
I
STBY
I
IBSD
V
IL
Test Conditions
I
OUT
= 1mA
R
LOAD
= 1Ω
V
EN
≥
1.2V, I
OUT
= 0mA
I
OUT
= 200mA, V
OUT
> 2.8V
I
OUT
= 300mA, V
OUT
> 2.8V
V
IN
= (V
OUT
+ 1V) to 5.5V,
I
OUT
= 1mA
1mA < I
OUT
< 300mA
V
EN
= GND, Shutdown
V
EN
= GND or VIN
V
IN
= 3V to 5.5V,
Shutdown
Min
−2
360
Typ
--
400
90
170
220
Max
+2
Units
%
mA
130
200
300
0.3
0.6
μA
mV
%
%
μA
nA
0.01
0
1
100
0.4
V
1.2
100
−80
μ
V
RMS
DB
Rejection Rate
f=
10kHz
TSD
COUT = 1µF, IOUT =
10mA
−55
165
Thermal Shutdown Temperature
°C
LP3987-datasheet
Oct.-2003
3-3
POWER [ LOWPOWER SEMICONDUCTOR INC ]
