M
S witc hed-Capac itor Voltage Converters
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to GND, or GND to V
)....................10.5V
Input Voltage on Pins 1, 6, and 7.........-0.3V
≤
V
≤
(V+ + 0.3V)
LV Input Current ..................................................................20μA
Output Short-Circuit Duration (V+
≤
5.5V)..................Continuous
Continuous Power Dissipation (T
= +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
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).
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
= -40°C to +85°C
T
A
= +25°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
V
OSC
= 0V or V+, LV open
R
L
= 5k
, T
A
= +25°C, f
OSC
5kHz, LV open
R
L
=
∞
, T
A
= +25°C, LV open
R
L
= 10k
, LV open
R
L
= 10k
, LV to GND
f
OSC
= 2.7kHz (ICL7660)
,
f
OSC
= 1kHz (MAX1044)
,
V+ = 2V, I
L
= 3mA,
LV to GND
30
200
200
R
L
=
∞
,
pins 1 and 7
no connection,
LV open
μA
10
Supply Current
20
Pin 1 = 0V
Pin 1 = V+
V+ = 2V
V+ = 5V
3
Oscillator Sink or
Source Current
%
%
95
97.0 99.9
98
Power Efficiency
Voltage Conversion Efficiency
C
OSC
= 1pF,
LV to GND (Note 2)
400
1
325
Output Resistance
I
L
= 20mA,
f
OSC
= 5kHz,
LV open
200
200
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
UNITS
MAX1044
MIN TYP MAX
PARAMETER
325
130
150
325
130
V
1.5
10
100
Supply Voltage
Range (Note 1)
65
5
Oscillator Frequency
100
M
k
1.0
Oscillator Impedance
80
175
225
95
99.0 99.9
98
400
300
250
250
ICL7660
MIN TYP MAX
300
140
150
250
120
3.0
1.5
10.0
3.5
100
55
10
100
1.0
R
L
=
∞
, pins 1 and 7 = V+ = 3V
T
A
= +25°C
T
A
= +25°C
μA
CONDITIONS