Datasheet

LP2980-ADJ
SNVS001E –APRIL 2000–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Limits in standard typeface are for T
J
= 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: V
IN
= 4.3V, V
OUT
= 3.3V, I
L
= 1 mA, C
IN
= 1 μF, C
OUT
= 2.2 μF, V
ON/OFF
= 2V.
LP2980I-ADJ
(1)
Symbol Parameter Conditions Typ Units
Min Max
I
GND
Ground Pin Current I
L
= 0 60 95
125
I
L
= 1 mA 80 110
170
I
L
= 10 mA 120 220 μA
460
I
L
= 50 mA 320 600
1200
V
ON/OFF
< 0.18V 0.01 1
I
ADJ
ADJ Pin Bias Current 1 mA ≤ I
L
≤ 50 mA 150 350 nA
V
ON/OFF
ON/OFF Input Voltage High = O/P ON 1.4 1.6
V
(3)
Low = O/P OFF 0.55 0.18
I
ON/OFF
ON/OFF Input Current V
ON/OFF
= 0 0.01 −1
μA
V
ON/OFF
= 5V 5 15
I
O
(PK) Peak Output Current V
OUT
≥ V
O
(NOM) − 5% 150 100 mA
e
n
Output Noise Voltage (RMS) BW = 300 Hz to 50 kHz, 160
μV
C
OUT
= 10 μF
ΔV
OUT
/ΔV
IN
Ripple Rejection f = 1 kHz 68
dB
C
OUT
= 10 μF
I
O
(MAX) Short Circuit Current R
L
= 0 (Steady State) 150
mA
(4)
(3) The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to APPLICATION HINTS.
(4) See TYPICAL PERFORMANCE CHARACTERISTICS curves.
TYPICAL APPLICATION CIRCUIT
*ON/OFF INPUT MUST BE ACTIVELY TERMINATED. TIE TO V
IN
IF THIS FUNCTION IS NOT TO BE USED.
**MINIMUM CAPACITANCE IS SHOWN TO ENSURE STABILITY OVER FULL LOAD CURRENT RANGE (SEE
APPLICATION HINTS).
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