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

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

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

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

correlated 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).

Absolute Maximum Ratings

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.

Electrical Characteristics

PARAMETER

CONDITIONS

MAX1044

ICL7660

UNITS

MIN TYP MAX MIN TYP MAX

Supply Current

RL = ∞,

pins 1 and 7

no connection,

LV open

TA = +25°C

30

200

80

175

µA

TA = 0°C to +70°C

200

225

TA = -40°C to +85°C

200

250

TA = -55°C to +125°C

200

250

RL = ∞, pins 1 and 7 = V+ = 3V

10

Supply Voltage

Range (Note 1)

RL = 10kΩ, LV open

3.0

10.0

V

RL = 10kΩ, LV to GND

1.5

10

1.5

3.5

Output Resistance

IL = 20mA,

fOSC = 5kHz,

LV open

TA = +25°C

65

100

55

100

Ω

TA = 0°C to +70°C

130

120

TA = -40°C to +85°C

130

140

TA = -55°C to +125°C

150

150

fOSC = 2.7kHz (ICL7660),

fOSC = 1kHz (MAX1044),

V+ = 2V, IL = 3mA,

LV to GND

TA = +25°C

325

250

TA = 0°C to +70°C

325

300

TA = -40°C to +85°C

325

300

TA = -55°C to +125°C

400

400

Oscillator Frequency

COSC = 1pF,

LV to GND (Note 2)

V+ = 5V

5

10

kHz

V+ = 2V

1

Power Efficiency

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

95

98

95

98

%

Voltage Conversion Efficiency RL = ∞, TA = +25°C, LV open

97.0 99.9

99.0 99.9

%

Oscillator Sink or

Source Current

VOSC = 0V or V+,

LV open

Pin 1 = 0V

3

µA

Pin 1 = V+

20

Oscillator Impedance

TA = +25°C

V+ = 2V

1.0

1.0

MΩ

V+ = 5V

100

100

kΩ

MAX1044/ICL7660

Switched-Capacitor Voltage Converters

www.maximintegrated.com

Maxim Integrated │ 2