LP2985 Datasheet, PDF (5/24 Pages) National Semiconductor (TI) – Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors

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LP2985
150-mA LOW-NOISE LOW-DROPOUT REGULATOR
WITH SHUTDOWN
SLVS522F – JULY 2004 – REVISED AUGUST 2005
Electrical Characteristics
at specified virtual junction temperature range, V_IN = V_OUT(NOM) + 1 V, V_ON/OFF = 2 V, C_IN = 1 µF, I_L = 1 mA, C_OUT = 4.7 µF
(unless otherwise noted)
PARAMETER
∆V_OUT
Output
voltage
tolerance
Line
regulation
V_IN – V_OUT
Dropout
voltage ⁽¹⁾
I_GND
Ground
pin
current
V_ON/OFF
ON/OFF
input
voltage ⁽²⁾
I_ON/OFF
ON/OFF
input
current
V_n
∆V_OUT/∆V_IN
Output
noise
(RMS)
Ripple
rejection
TEST CONDITIONS
T_J
I_L = 1 mA
1 mA ≤ I_L ≤ 50 mA
1 mA ≤ I_L ≤ 150 mA
V_IN = [V_OUT(NOM) + 1 V] to 16 V
I_L = 0
I_L = 1 mA
I_L = 10 mA
I_L = 50 mA
I_L = 150 mA
I_L = 0
I_L = 1 mA
I_L = 10 mA
I_L = 50 mA
I_L = 150 mA
V_ON/OFF < 0.3 V (OFF)
V_ON/OFF < 0.15 V (OFF)
V_ON/OFF = HIGH → O/P ON
V_ON/OFF = LOW → O/P OFF
V_ON/OFF = 0
V_ON/OFF = 5 V
BW = 300 Hz to 50 kHz,
C_OUT = 10 µF,
C_BYPASS = 10 nF
f = 1kHz, C_OUT = 10 µF,
C_BYPASS = 10 nF
25°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 105°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
–40°C to 125°C
25°C
25°C
LP2985A-xx
MIN TYP MAX
–1
1
–1.5
1.5
–2.5
2.5
–2.5
2.5
–3.5
3.5
0.007 0.014
0.032
1
3
5
7
10
15
40
60
90
120 150
225
280 350
575
65
95
125
75 110
170
120 220
400
350 600
1000
850 1500
2500
0.01 0.8
0.05
2
5
1.4
1.6
0.55
0.15
0.01
–2
5
15
30
45
LP2985-xx
UNIT
MIN TYP MAX
–1.5
1.5
–2.5
2.5
–3.5
–3
3.5 %V_NOM
3
–4
4
0.007 0.014
%/V
0.032
1
3
5
7
10
15
40
60
mV
90
120 150
225
280 350
575
65
95
125
75 110
170
120 220
400
350 600 µA
1000
850 1500
2500
0.01 0.8
0.05
2
5
1.4
1.6
V
0.55
0.15
0.01
–2
µA
5
15
30
µV
45
dB
(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.
(2) The ON/OFF input must be driven properly for reliable operation (see Application Information).
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