LP2954 datasheet(4/24 Pages) TI

4 / 24 page

LP2954, LP2954A

SNVS096D – JUNE 1999 – REVISED MARCH 2013

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Electrical Characteristics (continued)

Limits in standard typeface are for TJ = 25°C, bold typeface applies over the −40°C to +125°C temperature range. Limits

are specified by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless

otherwise noted: VIN = 6V, IL = 1 mA, CL = 2.2 μF.

2954AI

2954I

Symbol

Parameter

Conditions

Typical

Units

Min

Max

Min

Max

Additional Specifications for the Adjustable Device (LP2954AIM and LP2954IM)

VREF

See(8)

1.230

1.215

1.245

1.205

1.255

Reference Voltage

1.205

1.255

1.190

1.270

ΔVREF/

VIN=2.5V to

0.03

0.1

0.2

VREF

VO(NOM)+1V

Reference Voltage

Line Regulation

VIN=2.5V to

0.2

0.4

VO(NOM)+1V to 30V(9)

ΔVREF/ΔT

Reference Voltage

Temperature

See(2)

ppm/°C

Coefficient

IB(FB)

Feedback Pin Bias

Current

IGND

Ground Pin Current at

VSHUTDOWN≤1.1V

105

140

μA

Shutdown(5)

IO(SINK)

Output "OFF" Pulldown See(10)

Current

Dropout Detection Comparator

IOH

Output "HIGH"

VOH=30V

0.01

μA

Leakage Current

VOL

VIN=VO(NOM)−0.5V

150

250

Output "LOW" Voltage

IO(COMP)=400μA

400

VTHR(MAX) Upper Threshold

See(11)

−60

−80

−35

−80

−35

Voltage

−95

−25

−95

−25

VTHR(MIN)

Lower Threshold

See(12)

−85

−110

−55

−110

−55

Voltage

−160

−40

−160

−40

HYST

Hysteresis

See(12)

Shutdown Input

VOS

(Referred to VREF)

±3

−7.5

7.5

−7.5

7.5

Input Offset Voltage

−10

HYST

Hysteresis

VIN(S/D)=0V to 5V

−30

Input Bias Current

−50

(8)

VREF≤VOUT≤(VIN−1V), 2.3V≤VIN≤30V, 100μA≤IL≤250mA.

(9)

Two seperate tests are performed, one covering VIN=2.5V to VO(NOM)+1V and the other test for VIN=2.5V to VO(NOM)+1V to 30V.

(10) VSHUTDOWN≤1.1V, VOUT=VO(NOM).

(11) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage

measured at VIN=VO(NOM)+1V. To express these thresholds in terms of output voltage change, multiply by the Error amplifier gain,

which is VOUT/VREF=(R1+R2)/R2.

(12) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage

measured at VIN=VO(NOM)+1V. To express these thresholds in terms of output voltage change, multiply by the Error amplifier gain,

which is VOUT/VREF=(R1+R2)/R2.

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