5V/3.3V/3V 2A Step-Down, PWM,

Switch-Mode DC-DC Regulators

2

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Input Voltage .................................................. 45V

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

(Note 1) ..................................................... 35V

SENSE Pin Voltage ................................... -0.3V, +10V

Operating Temperature Ranges

MAX72_CCK ..................................... 0°C to +70°C

MAX72_ECK.................................... -40°C to +85°C

Junction Temperature Ranges:

MAX72_CCK .................................... 0°C to +125°C

MAX72_ECK .................................. -40°C to +125°C

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

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

ELECTRICAL CHARACTERISTICS

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

mA

3.5

4.8

Start-Up Mode (Note 4)

V

7.3

8.0

Normal Mode

Minimum Supply Voltage

8.5

11

µA

250

Switch-Off Leakage

mA

150

0.6

1.0

1.7

Error-Amplifier Sink Current

µA

100

140

225

Error-Amplifier Source Current

µmho

1.7

3000

5000

9000

Error-Amplifier Transconductance

V/V

V

1.2

2000

1V

Error-Amplifier Voltage Gain

Switch-On Voltage (Note 2)

%/V

0.03

0.10

kHz

Switching Frequency

20

85

120

90

100

110

%

85

90

Maximum Duty Cycle

8V

Switching Frequency Line Regulation

UNITS

MIN

TYP

MAX

3.5

5.0

CONDITIONS

PARAMETER

Supply Current (Note 3)

2.0

2.6

3.2

A

Switch-Current Limit (Note 5)

V

8.0

40.0

Input Supply Voltage Range