MAX860 Maxim, MAX860 Datasheet - Page 3

• Manufacturer Part Number: MAX860
• Description: 50mA / Frequency-Selectable / Switched-Capacitor Voltage Converters
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit (Inverter), V
otherwise noted. Typical values are at T
Note 2:
Note 3:
Note 4:
Note 5:
Switching Frequency
(Note 4)
FC Current (from V
Power Efficiency (Note 5)
Voltage-Conversion Efficiency
–
S
Shutdown Supply Current
Time to Exit Shutdown
—
H
—
D
—
N
–
Threshold
PARAMETER
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.
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
values in Table 3, due to larger 1 ⁄ (f
DD
_______________________________________________________________________________________
Switched-Capacitor Voltage Converters
)
SYMBOL
DD
I
V
V
f
FC
A
S
IH
IL
= +5V,
= +25°C.)
s
MAX860
MAX861
FC < 4V
MAX860,
FC = V
MAX861,
FC = V
MAX860/MAX861, FC = V
I
No load
LV = GND
–
No load, V
S
L
—
x C1) term in R
–
S
—
H
= 50mA to GND, C1 = C2 = 68µF
—
H
—
D
—
50mA, Frequency-Selectable,
D
—
N
–
N
–
DD
DD
< 0.3V
= V
OUT
DD
, FC = LV = GND, C1 = C2 = 10µF (Note 2), T
= -4V
OUT
CONDITIONS
.
FC = V
FC = GND
FC = OUT
FC = V
FC = GND
FC = OUT
R
to OUT
R
to GND
R
to OUT
R
to GND
MAX86_I/E
MAX86_M
DD
L
L
L
L
= 2kΩ from V
= 1kΩ from OUT
= 2kΩ from V
= 1kΩ from OUT
,
DD
DD
DD
DD
MIN
160
1.2
30
80
60
93
90
93
88
99
3
8
TYP
99.9
130
100
250
500
50
13
96
93
96
92
87
A
-2
6
= T
MIN
MAX
0.3
to T
10
-4
1
MAX
UNITS
, unless
kHz
µA
µA
µs
%
%
V
3