MAX865 Maxim, MAX865 Datasheet
MAX865
Manufacturer Part Number
MAX865
Description
Compact / Dual-Output Charge Pump
Manufacturer
Maxim
Datasheet
1.MAX865.pdf
(8 pages)
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The MAX865 is a CMOS charge-pump DC-DC convert-
er in an ultra-small µMAX package. It produces positive
and negative outputs from a single positive input, and
requires only four capacitors. The charge pump first
doubles the input voltage, then inverts the doubled volt-
age. The input voltage ranges from +1.5V to +6.0V.
The internal oscillator is guaranteed to be between
20kHz and 38kHz, keeping noise above the audio
range while consuming minimal supply current. A 75Ω
output impedance permits useful output currents up to
20mA.
The MAX865 comes in a 1.11mm-high, 8-pin µMAX
package that occupies half the board area of a stan-
dard 8-pin SOIC. For a device with selectable frequen-
cies and logic-controlled shutdown, refer to the MAX864
data sheet.
________________________Applications
19-0472; Rev 1; 7/97
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
_______________General Description
__________________Pin Configuration
Low-Voltage GaAsFET Bias in Wireless Handsets
VCO and GaAsFET Supplies
Split Supply from 3 Ni Cells or 1 Li+ Cell
Low-Cost Split Supply for Low-Voltage
Split Supply for Analog Circuitry
LCD Panels
TOP VIEW
Data-Acquisition Systems
C2+
C1-
C2-
V-
________________________________________________________________ Maxim Integrated Products
1
2
3
4
MAX865
MAX
Compact, Dual-Output Charge Pump
7
6
5
8
C1+
V+
IN
GND
____________________________Features
__________Typical Operating Circuit
______________Ordering Information
MAX865C/D
MAX865EUA
1.11mm-High µMAX Package
Compact: Circuit Fits in 0.08in
Requires Only Four Capacitors
Dual Outputs (positive and negative)
+1.5V to +6.0V Input Voltage
20kHz (min) Frequency (above the audio range)
PART
GND
V
(+1.5V to +6.0V)
IN
+V
C1+
C1-
C2+
C2-
IN
to ±2V
-40°C to +85°C
TEMP. RANGE
0°C to +70°C
MAX865
GND
IN
IN
CONVERTER
V+
V-
2
Dice
8 µMAX
PIN-PACKAGE
+2*V
-2*V
IN
IN
GND
1
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