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| LP2987 Datasheet, PDF (4/30 Pages) National Semiconductor (TI) – Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988) | |||
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LP2987, LP2988
SNVS004J â MARCH 1999 â REVISED APRIL 2013
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, COUT = 4.7 µF, CIN = 2.2 µF, VS/D = 2V.
Symbol
Parameter
Conditions
LM2987/8AI-X.X (1) LM2987/8I-X.X (1)
Typical
Min
Max
Min
Max
Units
VINâVO
Dropout Voltage
(2)
IL = 100 µA
2.0
2.0
1
3.5
3.5
IL = 75 mA
120
120
90
mV
170
170
IL = 200 mA
230
230
180
350
350
IGND
Ground Pin Current
IL = 100 µA
IL = 75 mA
120
120
100
150
150
µA
800
800
500
1400
1400
IL = 200 mA
2.1
2.1
1
mA
3.7
3.7
VS/D < 0.3V
0.05
1.5
1.5
µA
IO(PK)
Peak Output Current
VOUT ⥠VO(NOM) â 5%
400
250
250
IO(MAX)
Short Circuit Current
RL = 0 (Steady State) (3)
400
mA
en
LP2987 Output Noise
BW = 300 Hz to
Voltage (RMS)
50 kHz, VOUT = 3.3V
100
COUT = 10 µF
LP2988 Output Noise
BW = 300 Hz to 50 kHz,
Voltage (RMS)
VOUT = 3.3V
COUT = 10 µF
20
CBYPASS = .01 µF
µV(RMS)
ÎVOUT/ÎVIN Ripple Rejection
f = 1 kHz, COUT = 10 µF
CBYP = 0 (LP2988)
65
ÎVOUT/ÎT Output Voltage
(4)
Temperature Coefficient
20
dB
ppm/°C
IDELAY
Delay Pin Current Source
1.6
2.8
1.6
2.8
2.2
µA
1.4
3.0
1.4
3.0
SHUTDOWN INPUT
VS/D
IS/D
S/D Input Voltage
(5)
S/D Input Current
VH = O/P ON
VL = O/P OFF
VS/D = 0
VS/D = 5V
1.4
1.6
1.6
V
0.55
0.18
0.18
0
â1
â1
µA
5
15
15
(2) Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a
1V differential.
(3) See TYPICAL PERFORMANCE CHARACTERISTICS curves.
(4) Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
(5) To prevent mis-operation, the Shutdown input must be driven by a signal that swings above VH and below VL with a slew rate not less
than 40 mV/µs (see APPLICATION HINTS).
4
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Copyright © 1999â2013, Texas Instruments Incorporated
Product Folder Links: LP2987 LP2988
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