MAX1044/ICL7660
Switched-Capacitor Voltage Converters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 5.0V, LV pin = 0V, BOOST pin = open, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, 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 V
OUT
) when
replacing the Intersil ICL7660. Tests are performed without diode in circuit.
Note 2: f
OSC
is tested with C
OSC
= 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 V
OUT
)....................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 (T
A
= +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
T
A
= 0°C to +70°C
T
A
= +25°C
T
A
= -55°C to +125°C
V
OSC
= 0V or V+, LV open
R
L
= 5kΩ, T
A
= +25°C, f
OSC
5kHz, LV open
T
A
= -40°C to +85°C
R
L
= 10kΩ, LV open
R
L
= 10kΩ, LV to GND
f
OSC
= 2.7kHz (ICL7660),
f
OSC
= 1kHz (MAX1044),
V+ = 2V, IL = 3mA,
LV to GND
30 200
R
L
= ∞,
pins 1 and 7
no connection,
LV open
µA
10
Supply Current
20
Pin 1 = 0V
Pin 1 = V+
3
Oscillator Sink or
Source Current
%95 98Power Efficiency
C
OSC
= 1pF,
LV to GND (Note 2)
400
1
Ω
325
Output Resistance
I
L
= 20mA,
f
OSC
= 5kHz,
LV open
200
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
200
UNITS
MAX1044
MIN TYP MAX
PARAMETER
325
T
A
= +25°C
130
325
130
150
200
V
1.5 10
Supply Voltage
Range (Note 1)
65 100
5
Oscillator Frequency
100
V+ = 2V
V+ = 5V
MΩ1.0
Oscillator Impedance
80 175
95 98
400
300
250
225
ICL7660
MIN TYP MAX
300
140
250
120
150
250
3.0 10.0
1.5 3.5
55 100
10
100
1.0
T
A
= -55°C to +125°C
R
L
= ∞, pins 1 and 7 = V+ = 3V
T
A
= +25°C
T
A
= +25°C
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
V+ = 5V
V+ = 2V
R
L
= ∞, T
A
= +25°C, LV open 99.0 99.9 %97.0 99.9Voltage Conversion Efficiency
µA
kΩ
CONDITIONS
