MAX619 Maxim, MAX619 Datasheet - Page 7

• Manufacturer Part Number: MAX619
• Description: Regulated 5V Charge-Pump DC-DC Converter
• Manufacturer: Maxim

The MAX619’s high oscillator frequency makes good
layout important. A good layout ensures stability and
helps maintain the output voltage under heavy loads.
For best performance, use very short connections to
the capacitors.
Two MAX619s can be placed in parallel to increase
output drive capability. The IN, OUT, and GND pins
can be paralleled, but C1 and C2 pins cannot.
input bypass capacitor and output filter capacitor are,
to some extent, shared when two circuits are paral-
leled. If the circuits are physically close together, it
may be possible to use a single bypass and a single
output capacitor, each with twice the value of the single
circuit. If the MAX619s cannot be placed close togeth-
er, use separate bypass and output capacitors. The
amount of output ripple observed will determine
whether single input bypass and output filter capacitors
can be used.
Figure 3. Paralleling Two MAX619s
INPUT
________________________________________________________________________________________
IN
IN
MAX619
MAX619
GND
GND
Layout Considerations
OUT
OUT
Paralleling Devices
5V, 40mA
Regulated 5V Charge-Pump
The
___________________Chip Topography
TRANSISTOR COUNT: 599;
SUBSTRATE CONNECTED TO GND.
OUT
C2+
IN
DC-DC Converter
C1+
(1.828mm)
0.072”
C1-
C2-
GND
SHDN
(2.921mm)
0.115”
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