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
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
(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.)
PARAMETER
R
L
= ∞,
pins 1 and 7
no connection,
LV open
CONDITIONS
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
10
3.0
1.5
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
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
5
1
95
97.0
98
99.9
3
20
1.0
100
1.0
100
95
99.0
98
99.9
65
10
100
130
130
150
325
325
325
400
10
1.5
55
10.0
3.5
100
120
140
150
250
300
300
400
kHz
%
%
µA
MΩ
kΩ
Ω
V
MAX1044
MIN
TYP
30
MAX
200
200
200
200
MIN
ICL7660
TYP
80
MAX
175
225
250
250
µA
UNITS
Supply Current
R
L
= ∞, pins 1 and 7 = V+ = 3V
Supply Voltage
Range (Note 1)
R
L
= 10kΩ, LV open
R
L
= 10kΩ, LV to GND
I
L
= 20mA,
f
OSC
= 5kHz,
LV open
Output Resistance
f
OSC
= 2.7kHz (ICL7660),
f
OSC
= 1kHz (MAX1044),
V+ = 2V, I
L
= 3mA,
LV to GND
Oscillator Frequency
Power Efficiency
Voltage Conversion Efficiency
Oscillator Sink or
Source Current
Oscillator Impedance
C
OSC
= 1pF,
LV to GND (Note 2)
R
L
= 5kΩ, T
A
= +25°C, f
OSC
5kHz, LV open
R
L
= ∞, T
A
= +25°C, LV open
V
OSC
= 0V or V+,
LV open
T
A
= +25°C
Pin 1 = 0V
Pin 1 = V+
V+ = 2V
V+ = 5V
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
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).
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