LP2986 datasheet(6/33 Pages) TI1

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LP2986

SNVS137I – MARCH 1999 – REVISED SEPTEMBER 2015

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Electrical Characteristics (continued)

Unless otherwise specified: TJ = 25°C, VIN = VOUT(NOM) + 1 V, IOUT = 1 mA, COUT = 4.7 µF, CIN = 2.2 µF, VSD = 2 V.

LP2986AI-X.X(1)

LP2986I-X.X (1)

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

IOUT = 100 µA

100

120

100

120

IOUT = 100 µA

150

110

150

–40°C

≤ TJ ≤ 125°C

µA

IOUT = 75 mA

500

800

500

800

IOUT = 75 mA

1400

–40°C

≤ TJ ≤ 125°C

IGND

Ground pin current

IOUT = 200 mA

2.1

IOUT = 200 mA

3.7

–40°C

≤ TJ ≤ 125°C

VSD < 0.3 V

0.05

µA

VSD < 0.3 V

1.5

–40°C

≤ TJ ≤ 125°C

IOUT(PK)

Peak output current

VOUT ≥ VOUT(NOM) − 5%

250

400

250

400

IOUT(MAX)

Short-circuit current

RL = 0 (steady state)

(3)

400

Output noise voltage

BW = 300 Hz to 50 kHz,

160

µVRMS

(RMS)

COUT = 10 µF

ΔVOUT/ΔVIN Ripple rejection

ƒ = 1 kHz, COUT = 10 µF

Output voltage

ΔVOUT/ΔTD

See(4)

ppm/°C

temperature coefficient

FEEDBACK PIN

1.21

1.23

1.25

1.2

1.23

1.26

VFB

FEEDBACK pin voltage

–40°C

≤ TJ ≤ 125°C

1.2

1.26

1.19

1.27

See(5)

1.19

1.28

1.18

1.29

FEEDBACK pin voltage

ΔVFB/ΔT

See(6)

ppm/°C

temperature coefficient

IOUT = 200 mA

150

330

150

330

FEEDBACK pin bias

IFB

IOUT = 200 mA

current

760

–40°C

≤ TJ ≤ 125°C

FEEDBACK pin bias

ΔIFB/ΔT

current temperature

See(6)

0.1

nA/°C

coefficient

SHUTDOWN INPUT

VH = Output ON

1.4

VH = Output ON

1.6

–40°C

≤ TJ ≤ 125°C

VSD

SD Input voltage(7)

VL = Output OFF

0.55

µA

VL = Output OFF

0.18

–40°C

≤ TJ ≤ 125°C

VSD = 0 V

VSD = 0 V, –40°C ≤ TJ ≤

–1

125°C

ISD

SD Input current

VSD = 5 V

µA

VSD = 5 V, –40°C ≤ TJ ≤

125°C

(3)

See the Typical Characteristics section.

(4)

Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.

(5)

VFB ≤ VOUT ≤ (VIN − 1), 2.5 V ≤ VIN ≤ 16 V, 100 μA ≤ IL ≤ 200 mA, TJ ≤ 125°C.

(6)

Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.

(7)

To prevent mis-operation, the SHUTDOWN pin 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 and Implementation).

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