MAX830 datasheet(2/5 Pages) MAXIM

2 / 5 page

5V/3.3V/3V/Adjustable-Output, 1A,

Step-Down, PWM, Switch-Mode DC-DC Regulators

_______________________________________________________________________________________

Input Voltage .................................................. 40V

Switch Voltage with Respect to Input Voltage................ 50V

Switch Voltage with Respect to GND

(VSW negative) (Note 1)..................................... 20V

FB/SENSE Voltage ................................... -0.3V, +10V

SHUT Voltage (not to exceed VIN)............................ 30V

ILIM Voltage (forced).......................................... 5.5V

Operating Temperature Range..................... 0°C to +70°C

Junction Temperature Range ..................... 0°C to +125°C

Storage Temperature Range ................... -65°C to +160°C

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

ELECTRICAL CHARACTERISTICS

(VIN = 25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

Note 1: Do not exceed switch-to-input voltage limitation.

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.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

CONDITIONS

Error-Amplifier Source Current

VFB = 2.0V (MAX830) or

VSENSE = 2.0V

(MAX831/832/833)

MIN

TYP

MAX

UNITS

100

140

225

Supply Current (Note 3)

ILIM open

TA = +25°C

µA

TA = +25°C

Error-Amplifier Sink Current

VFB = 2.5V (MAX830) or

VSENSE = 5.5V

(MAX831/832/833)

1.2

1.7

2.2

Input Supply Voltage Range

830

0.6

1.0

1.7

TA = +25°C

VIN = 25V, VSW = 0V

150

Switch-Off Leakage

VIN = 30V, VSW = 0V

250

µA

811

VIN ≤ 30V, VSENSE = 5.5V (MAX831/MAX832/

MAX833) or VFB = 2.5V (MAX830)

Minimum Supply Voltage (Note 5)

Normal mode

Startup mode

3.5

4.8

7.3

8.0

VSHUT = 0.1V (Note 4)

140

500

µA

1.2

Maximum Duty Cycle

Switch-Current Limit (Note 6)

0.8

Switching-Frequency Line Regulation

≤ VIN ≤ 30V

0.03

0.10

%/V

Error-Amplifier Transconductance

Error-Amplifier Voltage Gain

≤ VC ≤ 4V

2000

V/V

3000

5000

9000

µmho

RLIM = 10kΩ (Note 7)

TA = +25°C

RLIM = 7kΩ (Note 7)

TA = +25°C

Switch-On Voltage (Note 2)

ISW = 0.2A

1.1

ISW = 1A

1.4

100

110

Switching Frequency

VFB or VSENSE = 0V (Note 6)

120

kHz

TA = +25°C

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