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SPX29301

3A High Current, Low Dropout Voltage Regulator

Signal Processing Technologies 

ELECTRICAL CHARACTERISTICS

at VIN=VOUT + 1V and IOUT = 10mA, CIN = 6.8μF, COUT = 10μF, TA = 25°C, unless otherwise specified. The Boldface applies

over the junction temperature range. Adjustable versions are set to 5.0V.

PARAMETER

CONDITIONS

FLAG OUTPUT (ERROR COMPARATOR)

TYP

MIN MAX UNITS

SPX29301/03

Output Leakage

VOH=16V

0.01

Current

Output Low Voltage

Device set for 5V,VIN=4.5V, IOL=250μA

220

1

μA

2

300

mV

400

Upper Threshold

Voltage

Device set for 5V, (Note 9)

60

40

mV

25

Lower Threshold

Voltage

Device set for 5V, (Note 9)

75

95

mV

140

Hysteresis

ENABLE Input

Device set for 5V, (Note 9)

15

mV

SPX29301/02

Input Logic Voltage

Low (OFF)

High (ON)

ENABLE Input Pin

Regulator Output

Current in Shutdown

Thermal Resistance

VIN<10V

VEN=16V

VEN=0.8V

(Note 10)

TO-200 Junction to Case, at Tab

TO-220 Junction to Ambient

TO-263 Junction to Case, at Tab

TO-263 Junction to Ambient

0.8

V

2.4

100

600

μA

750

1

μA

2

10

500

μA

3

°C/W

60

3

60

NOTES:

Note 1: Maximum positive supply voltage of 20V must be of limited duration (<100ms) and duty cycle of less than 1%. The maximum continuous supply

voltage is 16V.

Note 2: Full load current (IFL) is defined as 3.0A.

Note 3: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value.

Note 4: VIN = VOUT (NOMINAL) +1V. For example, use VIN = 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.

Note 5: 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 6: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range

Note 7: Thermal regulation is defined as the change in output voltage at time T after a change in power dissipation is applied, excluding load / line regulation effects.

Specifications for a 200mA load pulse as VIN = 20V (a 4W pulse) for t = 10ms.

Note 8: VREF≤ VOUT ≤ (VIN-1), 2.3V≤VIN ≤ 16V, 10mA ≤ IL ≤ IFL, Tj < Tjmax.

Note 9: 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. Threshold 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 10: VEN ≤ 0.8V and VIN ≤ 16V, VOUT = 0.

BLOCK DIAGRAM

IN

OUT

FLAG

+ 1.180V Reference 1.240V +

O.V

I LIMIT

28V

R1*

-

-

ADJ

EN

Thermal

Shutdown

R2*

Date: 9/5/06 Rev C

SPX29300/01/02/03 3A Low Dropout Voltage Regulator

3

GND

© 2006 Sipex Corporation

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