MAX870EUK(2004) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX870EUK Datasheet PDF : 8 Pages
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Switched-Capacitor Voltage Inverters
ABSOLUTE MAXIMUM RATINGS
IN to GND ..............................................................+6.0V to -0.3V
OUT to GND ..........................................................-6.0V to +0.3V
C1+ ..............................................................(VIN + 0.3V) to -0.3V
C1-............................................................(VOUT - 0.3V) to +0.3V
OUT Output Current ...........................................................50mA
OUT Short Circuit to GND .............................................Indefinite
Continuous Power Dissipation (TA = +70°C)
SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW
Operating Temperature Range
MAX870EUK/MAX871EUK ...............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+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
(VIN = +5V, C1 = C2 = 1µF (MAX870), C1 = C2 = 0.33µF (MAX871), TA = 0°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Current
TA = +25°C (Note 3)
MAX870
MAX871
0.7
1.0
mA
2.7
3.8
Minimum Supply Voltage
Maximum Supply Voltage
RLOAD = 10kΩ
RLOAD = 10kΩ
TA = +25°C
1.4
1.0
V
TA = 0°C to + 85°C
1.5
5.5
V
Oscillator Frequency
TA = +25°C
MAX870
MAX871
81
125
169
kHz
325
500
675
Power Efficiency
RLOAD = 500kΩ,
TA =+25°C
MAX870
MAX871
90
%
75
Voltage Conversion Efficiency
RLOAD = ∞, TA =+25°C
MAX870
MAX871
98
99.3
%
96
99
MAX870
C1 = C2 = 1µF
C1 = C2 = 0.47µF
20
50
25
Output Resistance (Note 1)
IOUT = TA = +25°C
5mA
MAX871
C1 = C2 = 0.33µF
C1 = C2 = 0.22µF
20
50
Ω
25
C1 = C2 = 0.1µF
35
TA = 0°C to + 85°C
65
Note 1: Capacitor contribution is approximately 20% of the output impedance [ESR + 1 / (pump frequency x capacitance)].
ELECTRICAL CHARACTERISTICS
(VIN = +5V, C1 = C2 = 1µF (MAX870), C1 = C2 = 0.33µF (MAX871), TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Current (Note 3)
MAX870
MAX871
1.3
mA
4.4
Minimum Supply-Voltage Range
Maximum Supply-Voltage Range
RLOAD = 10kΩ
RLOAD = 10kΩ
1.6
V
5.5
V
Oscillator Frequency
MAX870
MAX871
56
194
kHz
225
775
Output Resistance
IOUT = 5mA
65
Ω
MAX870
97
Voltage Conversion Efficiency
RLOAD = ∞
%
MAX871
95
Note 2: All -40°C to +85°C specifications are guaranteed by design.
Note 3: The MAX870/MAX871 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.
2 _______________________________________________________________________________________
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