3.3V/5V/Adjustable-Output,

Step-Up DC-DC Converters

2

_______________________________________________________________________________________

Supply Voltage (OUT to GND) ....................................-0.3V, +7V

Switch Voltage (LX to GND) ........................................-0.3V, +7V

Auxiliary Pin Voltages (SHDN, LBI, LBO, REF,

Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW

SO (derate 5.88mW/°C above +70°C) ..........................471mW

Operating Temperature Ranges:

MAX75_C_ _ ........................................................0°C to +70°C

MAX75_E_ _......................................................-40°C to +85°C

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

Storage Temperature Range............................... -65°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

Note 1: Supply current from the 3.3V output is measured with an ammeter between the 3.3V output and OUT pin. This current

correlates directly with actual battery supply current, but is reduced in value according to the step-up ratio and efficiency.

Note 2: Minimum value is production tested. Maximum value is guaranteed by design and is not production tested.

LBO Output Leakage Current

SHDN, 3/5, FB, LBI Input Current

V

2.7

5.5

Output Voltage Range

V

1.22

1.25

1.28

MAX757

FB Voltage

nA

±100

LBI = 1.25V, FB = 1.25V, SHDN = 0V or 3V,

3/5 = 0V or 3V

V

1.6

SHDN, 3/5 Input Voltage High

V

0.4

SHDN, 3/5 Input Voltage Low

Shutdown Quiescent Current

(Note 1)

Battery Quiescent Current

V

1.22

1.25

1.28

With falling edge

LBI Input Threshold

mV

25

LBI Input Hysteresis

V

0.4

LBO Output Voltage Low

µA

1

LBO = 5V

µA

20

40

FB = 1.3V (MAX757 only)

µA

Quiescent Supply Current in

3.3V Mode (Note 1)

%

0.8

2.0

Reference-Voltage Regulation

V

1.23

1.25

1.27

60

FB = 1.3V (MAX757 only)

µA

V

60

Output set for 3.3V

1.1

1.8

Minimum Start-Up Supply Voltage

4.8

5.0

5.2

Reference Voltage

3.17

3.30

3.43

V

4.8

5.0

5.2

Output Voltage

UNITS

MIN

TYP

MAX

CONDITIONS

PARAMETER

V

0.7

Minimum Operating Supply

Voltage (once started)