High-Efficiency, PWM, Step-Down,

N-Channel DC-DC Controller

2

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ABSOLUTE MAXIMUM RATINGS

Supply Voltage V+, AV+ to GND ..............................-0.3V to 17V

HIGH, EXT to GND....................................................-0.3V to 21V

AGND to GND..........................................................-0.3V to 0.3V

All Other Pins................................................-0.3V to (V+ + 0.3V)

Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW

Narrow SO (derate 8.70mW/°C above +70°C) ............696mW

CERDIP (derate 10.00mW/°C above +70°C) ...............800mW

Operating Temperature Ranges:

MAX746C_E ........................................................0°C to +70°C

MAX746E_E .....................................................-40°C to +85°C

MAX746MJE ..................................................-55°C to +125°C

Junction Temperatures:

MAX746C_E/E_E..........................................................+150°C

MAX746MJE.................................................................+175°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

SYMBOL

MIN

TYP

MAX

UNITS

Efficiency

94

%

Load Regulation

1.3

2.5

%

Line Regulation

0.1

%/V

OUT Leakage Current

50

80

µA

FB Input Logic Low

40

mV

Output Voltage

Input Voltage

415

V

4.85

5.08

5.25

V

Feedback Voltage

V

Reference Voltage

1.96

2.00

2.04

Reference Load Regulation

920

mV

Soft-Start Source Current

0.5

1.0

1.5

µA

Soft-Start Fault Current (Note 1)

100

500

µA

Supply Current (Note 2)

1.7

mA

0.95

1.4

20

µA

Oscillator Frequency

80

100

120

kHz

CONDITIONS

0V < (V+ - CS) < 0.125V

V+ = 4V to 15V, external feedback mode

For dual-mode switchover

SS = 0V

SS = 2V

Operating, V+ = 15V

Operating, V+ = 10V

Shutdown mode

(V+ - CS) = 0V,

external feedback mode

FB Input Leakage Current

1

100

nA

FB = 2V

MAX746E/M

MAX746E/M

1.95

2.00

2.05

MAX746C

V+

V+ = 6V to 15V, 0V < (V+ - CS) < 0.125V,

FB = 0V (includes line and load regulation)

MAX746C

1.96

2.00

2.04

V+ = 6V to 15V, FB = 0V

0.05

V+ = 6V

1.97

2.00

2.03

V

MAX746E/M

MAX746C

1.1

1.4

MAX746E/M

85

100

115

MAX746C