SPX2920S-5-0 Просмотр технического описания (PDF) - Signal Processing Technologies

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SPX2920S-5-0

400mA Low Drop Out Voltage Regulator with Shutdown

Signal Processing Technologies 

ELECTRICAL CHARACTERISTICS

Electrical characteristics at VIN = VO+1V, IO = 1mA, COUT = 2.2µF, TA = 25°C, unless otherwise specified. Boldface

applies over the full operating temperature range.

PARAMETER

Feedback Pin Bias Current

Temperature Coefficient

Error Comparator

Output Leakage Current

Output Low Voltage

Upper Threshold Voltage

CONDITIONS

(Note 2)

V0UT=20V

VIN=4.5V

IOUT=400µA

(Note 6)

Lower Threshold Voltage

(Note 6)

Hysteresis

Shutdown Input

Input Logic Voltage

Shutdown Pin Input Current

Regulator Output Current

in Shutdown

(Note 6)

Low (Regulator ON)

High (Regulator OFF)

VS=2.4V

VS=20V

(Note 7)

Thermal Resistance Theta JA

TO-220-3

TO-263-3

NSOIC-8

SOT-223

TYP

MIN

MAX

UNITS

0.1

nA/°C

0.01

1

2

150

250

400

60

40

25

75

95

140

15

1.3

0.7

2.0

30

50

100

450

600

750

3

10

20

29.4

31.4

128.4

62.3

µA

mV

mV

mV

mV

V

µA

µA

ºC/W

Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by

the total temperature range.

Note 2: Additional conditions for the 8-pin versions are feedback tied to 5V/3.3V tap and output tied to output sense

(VOUT = 5V) and VSHUTDOWN ≤ 0.8V.

Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes

in output voltage due to heating effects are covered under the specification for thermal regulation.

Note 4: Line regulation for the SPX2920 is tested at 150°C for IL = 1 mA. For TJ = 125°C, line regulation is guar-

anteed by design.

Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV

below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum

input supply voltage of 2V ( 2.3V over temperature) must be taken into account.

Note 6: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the

nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change,

multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of

5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds

remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below

nominal, 7.5% guaranteed.

Note 7: VSHUTDOWN ≥ 2V, VIN ≤ 20V, VOUT = 0, Feedback pin tied to 5V/3.3V Tap.

Date: 03/02/06

SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown

3

©Copyright 2006 Sipex Corporation

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