8V

5A/2A Step-Down, PWM,

Switch-Mode DC-DC Regulators

2

_______________________________________________________________________________________

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

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

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

Feedback 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.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switch-On Voltage (Note 2)

MAX724

1.85

2.10

2.50

MAX726

1.2

1.7

Switch-Off Leakage

MAX724

5

300

µA

10

500

ABSOLUTE MAXIMUM RATINGS

MAX726

150

250

2.30

V

8.5

11

Supply Current (Note 3)

mA

85

90

Maximum Duty Cycle

%

90

100

110

20

Switching Frequency

kHz

85

120

MAX724

5.5

6.5

8.5

Switch-Current Limit (Note 5)

A

MAX726

2.0

2.6

3.2

0.03

0.1

Switching Frequency Line Regulation

%/V

Input Supply Voltage Range

8.0

40.0

V

3.5

4.8

V

Normal Mode

7.3

8.0

Start-Up Mode (Note 4)

3.5

5.0

Minimum Supply Voltage

V