LP2966 datasheet(5/21 Pages) TI

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LP2966

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SNVS028E – APRIL 2000 – REVISED APRIL 2013

ELECTRICAL CHARACTERISTICS (continued)

Limits in standard typeface are for Tj = 25°C, and limits in boldface type apply over the full operating junction temperature

range. Unless otherwise specified, VIN = VO(NOM) + 1V

(1), C

OUT = 1µF, IOUT = 1mA, CIN = 1µF, VSD1 = VSD2 = VIN.

LP2966IMM(3)

Symbol

Parameter

Conditions

Typ(2)

Unit

Min

Max

Over Temperature Protection

Tsh(t)

Shutdown Threshold

165

°C

Tsh(h)

Thermal Shutdown

°C

Hysteresis

Shutdown Input

VSDT

Shutdown Threshold(12)

Output = Low

0.1

Output = High

VIN

VIN - 0.1

TdOFF

Turn-off Delay(13)

IL = 100 mA

µsec

TdON

Turn-on Delay(13)

IL = 100 mA

µsec

ISD

SD Input Current

VSD = VIN

VSD = 0 V

Error Flag Comparators

Threshold (output goes

See(14)

high to low)

VTH

Threshold Hysteresis

See(14)

VERR(Sat)

Error Flag Saturation

IFsink = 100µA

0.015

0.1

IEF(leak)

Error Flag Pin Leakage

Current

I(EFsink)

Error Flag Pin Sink

Current

AC Parameters

PSRR

Ripple Rejection

VIN = VOUT + 1V, f = 120Hz,

VOUT = 3.3V

VIN = VOUT + 0.3V, f = 120Hz,

VOUT = 3.3V

ρn(1/f)

Output Noise Density

f =120Hz

µV/

√Hz

Output Noise Voltage

BW = 10Hz

− 100kHz,

150

(rms)

COUT = 10µF

µV(rms)

BW = 300Hz

− 300kHz,

100

COUT = 10µF

(12) VSDT is the shutdown pin voltage threshold below which the output is disabled.

(13) Turn-on delay is the time interval between the low to high transition on the shutdown pin to the output voltage settling to within 5% of the

nominal value. Turn-off delay is the time interval between the high to low transition on the shutdown pin to the output voltage dropping

below 50% of the nominal value. The external load impedance influences the output voltage decay in shutdown mode.

(14) Error Flag threshold and hysteresis are specified as the percentage below the regulated output voltage.

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