Chip information – Rainbow Electronics MAX1853 User Manual
Page 7
MAX1852/MAX1853
SC70 Inverting Charge Pumps
with Shutdown
_______________________________________________________________________________________
7
Table 2. Capacitor Selection to Minimize
Output Resistance
Table 3. Capacitor Selection to Minimize
Capacitor Size
Table 1. Low-ESR Capacitor Manufacturers
PART
FREQUENCY
(kHz)
CAPACITOR
(µF)
TYPICAL
R
OUT
(
Ω)
MAX1852
50
4.7
15
MAX1853
200
1
15
PART
FREQUENCY
(kHz)
CAPACITOR
(µF)
TYPICAL
R
OUT
(
Ω)
MAX1852
50
3.3
20
MAX1853
200
0.68
20
714-960-6492
803-626-3123
603-224-1430
714-960-6492
803-626-3123
FAX
PHONE
803-946-0690
714-969-2491
603-224-1961
803-946-0690
714-969-2491
X7R
X7R
593D, 595D series
267 series
TPS series
SERIES
Matsuo
AVX
Sprague
Matsuo
AVX
MANUFACTURER
PRODUCTION
METHOD
Surface-Mount
Tantalum
Surface-Mount
Ceramic
MAX1852
MAX1853
4
3
1
V
OUT
= (2V
IN
) -
(V
FD1
) - (V
FD2
)
C2
+V
IN
C1
5
2
6
V
OUT
= -V
IN
C4
D1
D1, D2 = 1N4148
C3
D2
SHDN
Figure 6. Combined Doubler and Inverter
MAX1852
MAX1853
2
1
GND
OUT
V+
R
L
Figure 7. Heavy Load Connected to a Positive Supply
TRANSISTOR COUNT: 252
MAX1852
MAX1853
MAX1852
MAX1853
4
1
V
OUT
C2
4
+V
IN
C1
C1
5
5
2
2
6
3
3
6
1
V
OUT
= -V
IN
R
OUT
=
R
OUT
OF SINGLE DEVICE
NUMBER OF DEVICES
…
…
SHDN
Figure 5. Paralleling MAX1852/MAX1853s to Reduce Output
Resistance
Chip Information
MAX1852
MAX1853
MAX1852
MAX1853
4
1
V
OUT
C2
4
+V
IN
C1
C2
SHDN
C1
5
5
2
2
6
3
3
6
1
V
OUT
= -nV
IN
…
…
Figure 4. Cascading MAX1852/MAX1853s to Increase Output
Voltage