M
S witc hed-Capac itor Voltage Inverters
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
IN to GND..............................................................+6.0V to -0.3V
OUT to GND ..........................................................-6.0V to +0.3V
C1+ ..............................................................(V
IN
+ 0.3V) to -0.3V
C1-............................................................(V
OUT
- 0.3V) to +0.3V
OUT Output Current ...........................................................50mA
OUT Short Circuit to GND .............................................Indefinite
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V, C1 = C2 = 1μF (MAX870), C1 = C2 = 0.33μF (MAX871),
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
CONDITIONS
PARAMETER
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V, C1 = C2 = 1μF (MAX870), C1 = C2 = 0.33μF (MAX871),
T
A
= -40°C to +85°C
, unless otherwise noted.) (Note 2)
CONDITIONS
PARAMETER
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:
Capacitor contribution is approximately 20% of the output impedance [ESR + 1 / (pump frequency x capacitance)].
Note 2:
All -40°C to +85°C specifications are guaranteed by design.
Continuous Power Dissipation (T
A
= +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, 10sec) .............................+300°C
MAX871
T
A
= +25°C
T
A
= 0°C to + 85°C
MAX870
R
LOAD
= 500k
,
T
A
=+25°C
R
LOAD
= 10k
R
LOAD
= 10k
T
A
= +25°C
mA
2.7
1.0
3.8
0.7
1.0
Supply Current
96
99
20
%
90
75
99.3
Power Efficiency
kHz
325
500
675
1.4
1.5
V
Minimum Supply Voltage
V
5.5
169
Maximum Supply Voltage
81
125
UNITS
MIN
TYP
MAX
25
20
25
35
MAX871
R
LOAD
= 10k
R
LOAD
= 10k
MAX870
I
OUT
= 5mA
MAX871
MAX870
mA
4.4
1.3
Supply Current
65
Output Resistance
kHz
225
775
Oscillator Frequency
V
V
1.6
Minimum Supply-Voltage Range
Maximum Supply-Voltage Range
56
194
UNITS
MIN
TYP
MAX
T
A
= +25°C
Oscillator Frequency
C1 = C2 = 0.47μF
C1 = C2 = 0.33μF
C1 = C2 = 0.22μF
C1 = C2 = 0.1μF
I
OUT
=
5mA
C1 = C2 = 1μF
Output Resistance (Note 1)
50
MAX870
T
A
= +25°C
50
MAX871
65
T
A
= 0°C to + 85°C
MAX870
MAX871
MAX870
MAX871
MAX870
MAX871
R
LOAD
=
∞,
T
A
=+25°C
%
98
Voltage Conversion Efficiency
R
LOAD
=
∞
%
97
95
Voltage Conversion Efficiency
MAX870
MAX871
5.5