MAX86_I_A ......................................................-25°C to +85°C
MAX86_ESA.....................................................-40°C to +85°C
MAX86_M_A ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+240°C
OUT may be shorted to GND for 1sec without damage, but shorting OUT to V
DD
may damage the device and should be
avoided. Also, for temperatures above +85°C, OUT must not be shorted to GND or V
DD
, even instantaneously, or device
damage may result.
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
— —
–— –
(Typical Operating Circuit (Inverter), V
DD
= +5V, SHDN = V
DD
, FC = LV = GND, C1 = C2 = 10µF (Note 2), T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Supply Voltage
SYMBOL
V
DD
R
L
= 1kΩ
CONDITIONS
Inverter, LV = GND
Doubler, LV = OUT
FC = V
DD
= 5V
MAX860I/E
FC = V
DD
= 3V
FC = GND
FC = OUT
FC = V
DD
MAX860M
No-Load Supply Current
(Note 3)
I
DD
MAX861I/E
FC = GND
FC = OUT
FC = V
DD
FC = GND
FC = OUT
FC = V
DD
MAX861M
FC = GND
FC = OUT
V
DD
= 5V, V
OUT
more negative than -3.75V
Output Current
I
OUT
V
DD
= 3V, V
OUT
more negative than -2.5V
Output Resistance
(Note 4)
R
OUT
I
L
= 50mA
I
L
= 10mA, V
DD
= 2V
10
30
12
20
25
35
Ω
50
100
mA
0.3
1.1
2.5
MIN
1.5
2.5
0.2
0.07
0.6
1.4
1.0
2.5
0.4
1.3
3.3
0.4
2.0
5.0
0.5
2.6
6.5
mA
TYP
MAX
5.5
5.5
0.3
UNITS
V
2
Maxim Integrated
MAX860/MAX861
50mA, Frequency-Selectable,
Switched-Capacitor Voltage Converters
— —
–— –
(Typical Operating Circuit (Inverter), V
DD
= +5V, SHDN = V
DD
, FC = LV = GND, C1 = C2 = 10µF (Note 2), T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
MAX860
Switching Frequency
(Note 5)
f
S
MAX861
FC Current (from V
DD
)
I
FC
FC < 4V
MAX860,
FC = V
DD
R
L
= 2kΩ from V
DD
to OUT
R
L
= 1kΩ from OUT
to GND
R
L
= 2kΩ from V
DD
to OUT
R
L
= 1kΩ from OUT
to GND
93
90
93
88
CONDITIONS
FC = V
DD
FC = GND
FC = OUT
FC = V
DD
FC = GND
FC = OUT
MIN
3
30
80
8
60
160
TYP
6
50
130
13
100
250
-2
96
93
96
92
87
99
1.2
0.3
—
– ——–
S H D N < 0.3V
No load, V
OUT
= -4V
MAX86_I/E
MAX86_M
500
1
10
99.9
%
V
µA
µs
%
-4
µA
kHz
MAX
UNITS
ELECTRICAL CHARACTERISTICS (continued)
Power Efficiency (Note 6)
MAX861,
FC = V
DD
MAX860/MAX861, FC = V
DD
,
I
L
= 50mA to GND, C1 = C2 = 68µF
Voltage-Conversion Efficiency
— —
–— –
SHDN Threshold
Shutdown Supply Current
Time to Exit Shutdown
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
V
IH
V
IL
No load
LV = GND
C1 and C2 are low-ESR (<0.2Ω) aluminum electrolytics. Capacitor ESR adds to the circuit’s output resistance. Using
capacitors with higher ESR may reduce output voltage and efficiency.
MAX860/MAX861 may draw high supply current during startup, up to the minimum operating supply voltage. To guaran-
tee proper startup, the input supply must be capable of delivering 90mA more than the maximum load current.
Specified output resistance includes the effect of the 0.2Ω ESR of the test circuit’s capacitors.
The switches are driven directly at the oscillator frequency, without any division.
At lowest frequencies, using 10µF capacitors gives worse efficiency figures than using the recommended capacitor
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