MAX5071 datasheet(2/22 Pages) MAXIM

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High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = +15V, RT = 10kΩ, CT = 3.3nF, VVREF = OPEN, CVREF = 0.1µF, COMP = OPEN, VFB = 2V, CS = GND, TA = -40°C to +85°C,

unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VCC (Low-Impedance Source) to GND ..................-0.3V to +30V

VCC (ICC < 30mA).....................................................Self Limiting

OUT to GND ...............................................-0.3V to (VCC + 0.3V)

OUT Current.............................................................±1A for 10µs

FB, SYNC, COMP, CS, RT/CT, VREF to GND ...........-0.3V to +6V

COMP Sink Current (MAX5070)..........................................10mA

Continuous Power Dissipation (TA = +70°C)

8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW

8-Pin SO (derate 5.9mW/°C above +70°C)...............470.6mW

Operating Temperature Range (Automotive) ....-40°C to +125°C

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

REFERENCE

Output Voltage

VVREF

TA = +25°C, IVREF = 1mA

4.950

5.000

5.050

Line Regulation

∆VLINE

12V < VCC < 25V, IVREF = 1mA

0.4

Load Regulation

∆VLOAD

1mA < IVREF < 20mA

Total Output Variation

VREFT

1mA < IVREF < 20mA, 12V < VCC < 25V

4.9

5.1

Reference Output-Noise Voltage

VNOISE

10Hz < f < 10kHz, TA = +25°C

µV

Reference Output Short Circuit

IS_SC

VVREF = 0V

-30

-100

-180

OSCILLATOR

Initial Accuracy

TA = +25°C

kHz

Voltage Stability

12V < VCC < 25V

0.2

0.5

Temp Stability

-40°C < TA < +85°C

0.5

RT/CT Voltage Ramp (P-P)VRAMP

1.7

RT/CT Voltage Ramp Valley

VRAMP_VALLEY

1.1

Discharge Current

IDIS

VRT/CT = 2V, TA = +25°C

7.9

8.3

8.7

Frequency Range

fOSC

1000

kHz

ERROR AMPLIFIER (MAX5070A/MAX5070B)

FB Input Voltage

VFB

FB shorted to COMP

2.465

2.5

2.535

FB Input Bias Current

IB(FB)

-0.01

-0.1

µA

Open-Loop Voltage Gain

AVOL

2V ≤ VCOMP ≤ 4V

100

Unity-Gain Bandwidth

fGBW

MHz

Power-Supply Rejection Ratio

PSRR

12V ≤ VCC ≤ 25V (Note 2)

COMP Sink Current

ISINK

VFB = 2.7V, VCOMP = 1.1V

COMP Source Current

ISOURCE

VFB = 2.3V, VCOMP = 5V

-0.5

-1.2

-1.8

COMP Output High Voltage

VCOMPH

VFB = 2.3V, RCOMP = 15kΩ to GND

5.8

COMP Output Low Voltage

VCOMPL

VFB = 2.7V, RCOMP = 15kΩ to VREF

0.1

0.5

CURRENT-SENSE AMPLIFIER

Gain

ACS

(Notes 3, 4)

2.85

3.26

V/V

MAX5070A/B (Note 3)

0.95

1.05

Maximum Current-Sense Signal

VCS_MAX

VCOMP = 5V, MAX5071_

0.95

1.05

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