LP2983 datasheet(6/25 Pages) TI1

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LP2983

SNVS170D – OCTOBER 2001 – REVISED APRIL 2016

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Electrical Characteristics (continued)

Unless otherwise specified: TJ = 25°C, VIN = VO(NOM) + 1 V, IL = 1 mA, COUT = 1 μF, VON/OFF = 2 V.

PARAMETER

TEST CONDITIONS

LP2981AI-XX(1)

LP2981I-XX(1)

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

(3)

The LP2983 has foldback current limiting which allows a high peak current when VOUT > 0.5 V, and then reduces the maximum output

current as VOUT is forced down to ground. See related curve(s) in Typical Characteristics section.

Output noise voltage

(RMS)

BW = 300 Hz to 50 kHz

VOUT = 1.2 V, COUT = 10 μF

μV

ΔVO/ΔVIN Ripple rejection

ƒ = 1 kHz, COUT = 2.2 μF

IO(MAX)

Short-circuit current

RL = 0 Ω (steady state)

(3)

400

IO(PK)

Peak output current

VOUT ≥ VO(NOM) − 5%

250

6.6 Typical Characteristics

Unless otherwise specified: CIN = 1 µF, COUT = 2.2 µF, VIN = VOUT(NOM) + 1, TA = 25°C, ON/OFF pin is tied to VIN.

Figure 1. LP2983 Tempco

Figure 2. Minimum Input Voltage vs Temperature

Load = 0 mA

Figure 3. Input Current vs VIN

Load = 1 mA

Figure 4. Input Current vs VIN

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