MAX1044ESA datasheet(2/12 Pages) MAXIM

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Switched-Capacitor Voltage Converters

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 5.0V, LV pin = 0V, BOOST pin = open, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted.)

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.

Note 1: The Maxim ICL7660 and MAX1044 can operate without an external output diode over the full temperature and voltage

ranges. The Maxim ICL7660 can also be used with an external output diode in series with pin 5 (cathode at VOUT) when

replacing the Intersil ICL7660. Tests are performed without diode in circuit.

Note 2: fOSC is tested with COSC = 100pF to minimize the effects of test fixture capacitance loading. The 1pF frequency is correlat-

ed to this 100pF test point, and is intended to simulate pin 7’s capacitance when the device is plugged into a test socket

with no external capacitor. For this test, the LV pin is connected to GND for comparison to the original manufacturer’s

device, which automatically connects this pin to GND for (V+ > 3V).

Supply Voltage (V+ to GND, or GND to VOUT)....................10.5V

Input Voltage on Pins 1, 6, and 7 .........-0.3V

≤ V

IN ≤ (V+ + 0.3V)

LV Input Current ..................................................................20µA

Output Short-Circuit Duration (V+

≤ 5.5V)..................Continuous

Continuous Power Dissipation (TA = +70°C)

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

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

µMAX (derate 4.1mW/°C above +70°C) ......................330mW

CERDIP (derate 8.00mW/°C above +70°C) .................640mW

TO-99 (derate 6.67mW/°C above +70°C) ....................533mW

Operating Temperature Ranges

MAX1044C_ _ /ICL7660C_ _ ..............................0°C to +70°C

MAX1044E_ _ /ICL7660E_ _ ............................-40°C to +85°C

MAX1044M_ _ /ICL7660M_ _ ........................-55°C to +125°C

Storage Temperature Range ............................-65°C to + 150°C

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

kHz

TA = 0°C to +70°C

TA = +25°C

TA = -55°C to +125°C

VOSC = 0V or V+, LV open

RL = 5kΩ, TA = +25°C, fOSC 5kHz, LV open

TA = -40°C to +85°C

RL = 10kΩ, LV open

RL = 10kΩ, LV to GND

fOSC = 2.7kHz (ICL7660),

fOSC = 1kHz (MAX1044),

V+ = 2V, IL = 3mA,

LV to GND

200

RL = ∞,

pins 1 and 7

no connection,

LV open

µA

Supply Current

Pin 1 = 0V

Pin 1 = V+

Oscillator Sink or

Source Current

Power Efficiency

COSC = 1pF,

LV to GND (Note 2)

400

Ω

325

Output Resistance

IL = 20mA,

fOSC = 5kHz,

LV open

200

TA = 0°C to +70°C

TA = -40°C to +85°C

200

UNITS

MAX1044

MIN TYP MAX

PARAMETER

325

TA = +25°C

130

325

130

150

200

1.5

Supply Voltage

Range (Note 1)

100

Oscillator Frequency

100

V+ = 2V

V+ = 5V

Ω

1.0

Oscillator Impedance

175

400

300

250

225

ICL7660

MIN TYP MAX

300

140

250

120

150

250

3.0

10.0

1.5

3.5

100

1.0

TA = -55°C to +125°C

RL = ∞, pins 1 and 7 = V+ = 3V

TA = +25°C

TA = 0°C to +70°C

TA = -40°C to +85°C

TA = -55°C to +125°C

V+ = 5V

V+ = 2V

RL = ∞, TA = +25°C, LV open

99.0 99.9

97.0 99.9

Voltage Conversion Efficiency

µA

Ω

CONDITIONS

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