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MAX1720 View Datasheet(PDF) - Maxim Integrated

Part Name
Description
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MAX1720 Datasheet PDF : 0 Pages
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
ELECTRICAL CHARACTERISTICS
(VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10µF (MAX1720), C1 = C2 = 1µF
(MAX1719/MAX1721), circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Supply Voltage Range
VIN
RL = 10k
MAX1720
1.5
MAX1719/MAX1721
1.6
5.5
V
5.5
Quiescent Current (Note 3)
MAX1720
ICC
MAX1719/MAX1721
100
µA
750
Oscillator Frequency
fOSC
MAX1720
MAX1719/MAX1721
6
21
kHz
60
200
Voltage Conversion Efficiency
IOUT = 0
99
%
Output Resistance (Note 1)
RO IOUT = 10mA
65
Output Current
IOUT Continuous, long-term
25 mARMS
OUT to GND Shutdown
Resistance
SHDN = IN (MAX1719), SHDN = GND
RO, SHDN (MAX1720/MAX1721), OUT is internally
forced to GND in shutdown
12
SHDN/ SHDN Input Logic High
VIH
+2.5V VIN +5.5V
VIN (MIN) VIN +2.5V
2.1
V
VIN - 0.2
SHDN/ SHDN Input Logic Low
VIL
+2.5V VIN +5.5V
VIN (MIN) VIN +2.5V
0.6
V
0.2
Note 1: Capacitor contribution (ESR component plus (1/fOSC) · C) is approximately 20% of output impedance.
Note 2: All specifications from -40°C to +85°C are guaranteed by design, not production tested.
Note 3: The MAX1719/MAX1720/MAX1721 may draw high supply current during startup, up to the minimum operating supply voltage.
To guarantee proper startup, the input supply must be capable of delivering 90mA more than the maximum load current.
Typical Operating Characteristics
(Circuit of Figure 1, VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = C3, TA = +25°C, unless other-
wise noted.)
OUTPUT VOLTAGE
vs. OUTPUT CURRENT
0
VIN = +1.5V
VIN = +2V
-1
-2
VIN = +3.3V
-3
-4
VIN = +5V
-5
0 5 10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
MAX1720
EFFICIENCY vs. OUTPUT CURRENT
100
90
80
VIN = +5V
70
60
50 VIN = +1.5V VIN = +2V
VIN = +3.3V
40
30
20
10
0
0 5 10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
MAX1719/MAX1721
EFFICIENCY vs. OUTPUT CURRENT
100
90
80
VIN = +5V
70
60
VIN = +1.5V
50
VIN = +2V
40
VIN = +3.3V
30
20
10
0
0 5 10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
_______________________________________________________________________________________ 3
 

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