LP2950 Datasheet, PDF (4/16 Pages) National Semiconductor (TI) – Series of Adjustable Micropower Voltage Regulators

LP2950
ELECTRICAL CHARACTERISTICS (continued) (Vin = VO + 1.0 V, IO = 100 µA, CO = 1.0 µF, TJ = 25°C [Note 1], unless
otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Line Regulation (Vin = VO(nom) +1.0 V to 30 V) [Note 2]
LP2950C–XX/LP2951C/LP2951C–XX
LP2950AC–XX/LP2951AC/LP2951AC–XX
Regline
–
–
%
0.08
0.20
0.04
0.10
Load Regulation (IO = 100 µA to 100 mA)
LP2950C–XX/LP2951C/LP2951C–XX
LP2950AC–XX/LP2951AC/LP2951AC–XX
Regload
–
–
%
0.13
0.20
0.05
0.10
Dropout Voltage
IO = 100 µA
IO = 100 mA
Supply Bias Current
IO = 100 µA
IO = 100 mA
Dropout Supply Bias Current (Vin = VO(nom) – 0.5 V,
IO = 100 µA) [Note 2]
VI – VO
–
–
ICC
–
–
ICCdropout
–
mV
30
80
350
450
93
120
µA
4.0
12
mA
110
170
µA
Current Limit (VO Shorted to Ground)
Thermal Regulation
Output Noise Voltage (10 Hz to 100 kHz) [Note 3]
CL = 1.0 µF
CL = 100 µF
LP2951A/LP2951AC ONLY
ILimit
–
Regthermal
–
Vn
–
–
220
300
mA
0.05
0.20
%/W
µVrms
126
–
56
–
Reference Voltage (TJ = 25°C)
LP2951C/LP2951C–XX
LP2951AC/LP2951AC–XX
Vref
V
1.210
1.235
1.260
1.220
1.235
1.250
Reference Voltage (TJ = – 40 to +125°C)
LP2951C/LP2951C–XX
LP2951AC/LP2951AC–XX
Vref
V
1.200
–
1.270
1.200
–
1.260
Reference Voltage (TJ = – 40 to +125°C)
IO = 100 µA to 100 mA, Vin = 23 to 30 V
LP2951C/LP2951C–XX
LP2951AC/LP2951AC–XX
Vref
V
1.185
–
1.285
1.190
–
1.270
Feedback Pin Bias Current
ERROR COMPARATOR
IFB
–
15
40
nA
Output Leakage Current (VOH = 30 V)
Output Low Voltage (Vin = 4.5 V, IOL = 400 µA)
Upper Threshold Voltage (Vin = 6.0 V)
Lower Threshold Voltage (Vin = 6.0 V)
Hysteresis (Vin = 6.0 V)
Ilkg
–
VOL
–
Vthu
40
Vthl
–
Vhy
–
0.01
1.0
µA
150
250
mV
45
–
mV
60
95
mV
15
–
mV
SHUTDOWN INPUT
Input Logic Voltage
Logic “0” (Regulator “On”)
Logic “1” (Regulator “Off”)
Vshtdn
0
V
–
0.7
2.0
–
30
Shutdown Pin Input Current
Vshtdn = 2.4 V
Vshtdn = 30 V
Ishtdn
–
35
–
450
Regulator Output Current in Shutdown Mode
Ioff
–
3.0
(Vin = 30 V, Vshtdn = 2.0 V, VO = 0, Pin 6 Connected to Pin 7)
NOTES: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. VO(nom) is the part number voltage option.
3. Noise tests on the LP2951 are made with a 0.01 µF capacitor connected across Pins 7 and 1.
µA
50
600
10
µA
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