SPX29150 查看數據表（PDF） - Exar Corporation

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SPX29150

1.5A Low Dropout Voltage Regulator

Exar Corporation 

ELECTRICAL CHARACTERISTICS cont'd

PARAMETER

CONDITIONS

Typ

Upper Threshold

Voltage

Device set for 5V (Note 5)

60

Lower Threshold

Voltage

Device set for 5V (Note 5)

75

Hysteresis

Device set for 5V (Note 5)

15

ENABLE input

SPX29151/52

Input Logic Voltage

Low (OFF)

High (ON)

VIN < 10V

Enable Input Pin Input

Current

VEN=16V

100

VEN=0.8V

Regulator Output Cur-

rent in Shutdown

(Note 6)

10

TO-220 Junction to Case, at Tab

3

TO-220 Junction to Ambient

30

Thermal Resistance

TO-263 Junction to Case, at Tab

3

TO-263 Junction to Ambient

32

SPX29150/51

Min Max

40

25

95

140

2.4V

0.8

600

750

1

2

500

Units

mV

mV

mV

V

µA

µA

µA

°C/W

NOTES:

Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value.

Note 2: VIN = VOUT (NOMINAL) +1V. For example, use VIN = 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.

Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground

current.

Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line

regulation effects.

Note 5: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V

input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at

a programmable output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Thresholds

remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.

Note 6: VEN ≤ 0.8V and VIN ≤ 16V, VOUT = 0.

Note 7: Maximum positive supply voltage of 20V must be of limited duration (<100m_) < 1%. The maximum continuous supply voltage is 16V.

Note 8: VREF ≤ VOUT ≤ (VIN-1), 2.5V≤VIN ≤ 16V, 10mA ≤ IL ≤ IFL, TJ < TJMAX.

BLOCK DIAGRAM

IN

FLAG

+ 1.180v Reference 1.240v +

O.v

I LIMIT

28v

OUT

R1*

-

-

ADJ

EN

Thermal

shutdown

R2*

REV B 06/05/08

SP29150/51/52/53 1.5A Low Dropout Voltage Regulator



GND

© Copyright 2008 Exar Corporation

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