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LP2981 数据表(PDF) 5 Page - Texas Instruments

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部件名 LP2981
功能描述  100-mA ULTRA-LOW DROPOUT REGULATOR WITH SHUTDOWN
PDF  17 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LP2981 数据表(HTML) 5 Page - Texas Instruments

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Electrical Characteristics
LP2981
www.ti.com ......................................................................................................................................................... SLVS521F – JULY 2004 – REVISED AUGUST 2008
at specified free-air temperature range, VIN = VOUT(NOM) + 1 V, VON/OFF = 2 V, CIN = 1 µF, IL = 1 mA, COUT = 4.7 µF
(unless otherwise noted)
LP2981A-xx
LP2981-xx
PARAMETER
TEST CONDITIONS
TA
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
IL = 1 mA
25°C
–0.75
0.75
–1.25
1.25
Output voltage
ΔVOUT
25°C
–1
1
–2
2 %VNOM
tolerance
IL = 1 mA to 100 mA
–40°C to 125°C
–2.5
2.5
–3.5
3.5
25°C
0.007
0.014
0.007
0.014
Output voltage
VIN = (VOUT(NOM) + 1 V) to
ΔVOUT/ΔVIN
%/V
line regulation
16 V
–40°C to 125°C
0.032
0.032
25°C
1
3
1
3
IL = 0
–40°C to 125°C
5
5
25°C
7
10
7
10
IL = 1 mA
–40°C to 125°C
15
15
Dropout
VIN – VOUT
mV
voltage(1)
25°C
70
100
70
100
IL = 25 mA
–40°C to 125°C
150
150
25°C
200
250
200
250
IL = 100 mA
–40°C to 125°C
375
375
25°C
65
95
65
95
IL = 0
–40°C to 125°C
125
125
25°C
80
110
80
110
IL = 1 mA
–40°C to 125°C
170
170
25°C
200
300
200
300
IL = 25 mA
Ground pin
IGND
–40°C to 125°C
550
550
µA
current
25°C
600
1000
600
1000
IL = 100 mA
–40°C to 125°C
1700
1700
VON/OFF < 0.3 V (OFF)
25°C
0.01
0.8
0.01
0.8
–40°C to 105°C
0.05
2
0.05
2
VON/OFF < 0.15 V (OFF)
–40°C to 125°C
5
5
25°C
1.4
1.4
High = O/P ON
–40°C to 125°C
1.6
1.6
ON/OFF input
VON/OFF
V
voltage(2)
25°C
0.5
0.5
Low = O/P OFF
–40°C to 125°C
0.15
0.15
25°C
0.01
0.01
VON/OFF = 0
–40°C to 125°C
–1
–1
ON/OFF input
ION/OFF
µA
current
25°C
5
5
VON/OFF = 5 V
–40°C to 125°C
15
15
Peak output
IOUT(PK)
VOUT ≥ VOUT(NOM) – 5%
25°C
150
400
400
mA
current
Output noise
BW = 300 Hz to 50 kHz,
Vn
25°C
160
160
µV
voltage (RMS)
COUT = 10 µF
ΔVOUT/ΔVIN Ripple rejection
f = 1 kHz, COUT = 10 µF
25°C
63
63
dB
Short-circuit
IOUT(MAX)
RL = 0 (steady state)
25°C
150
150
mA
current
(1)
Dropout voltage is defined as the input-to-output differential at which the output voltage drops 100 mV below the value measured with a
1-V differential. This dropout specification does not apply to the 1.8-V option, as the minimum VIN = 2.2 V must be observed for proper
biasing of LDO control circuitry.
(2)
The ON/OFF input must be actively terminated. Connect to VIN if this function is not used (see Application Information).
Copyright © 2004–2008, Texas Instruments Incorporated
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