MAX865EUA-T Maxim Integrated Products, MAX865EUA-T Datasheet

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MAX865EUA-T

Manufacturer Part Number
MAX865EUA-T
Description
Charge Pumps Compact Dual-Out Charge Pump
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX865EUA-T

Function
Inverting, Step Up
Output Voltage
- 3 V to - 12 V, 3 V to 12 V
Output Current
20 mA
Maximum Operating Temperature
+ 85 C
Package / Case
uMAX-8
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT

Available stocks

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Part Number:
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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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MAX865EUA-T Summary of contents

Page 1

... For small orders, phone 408-737-7600 ext. 3468. ____________________________Features 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) ______________Ordering Information PART MAX865C/D MAX865EUA __________Typical Operating Circuit V IN (+1.5V to +6.0V ...

Page 2

... OUTPUT CURRENT (mA) 2 _______________________________________________________________________________________ Operating Temperature Range MAX865EUA .....................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300° unless otherwise noted. Typical values are MIN MAX CONDITIONS R = 10kΩ LOAD R = 10kΩ LOAD T = +25° -40°C to +85°C (Note 1) ...

Page 3

Compact, Dual-Output Charge Pump ____________________________Typical Operating Characteristics (continued) (Circuit of Figure 5V +25°C, unless otherwise noted OUTPUT VOLTAGE vs. OUTPUT CURRENT BOTH V+ AND V- LOADED ...

Page 4

Compact, Dual-Output Charge Pump ____________________________Typical Operating Characteristics (continued) (Circuit of Figure 5V +25°C, unless otherwise noted OUTPUT RIPPLE ( s/div V = 4.75V, ...

Page 5

Compact, Dual-Output Charge Pump _______________Detailed Description The MAX865 contains all the circuitry needed to imple- ment a voltage doubler/inverter. Only four external capacitors are needed. These may be polarized elec- trolytic or ceramic capacitors with values ranging from 1µF to ...

Page 6

... V DROOP IN DROOP+ The output resistance for the positive and negative charge pumps are tested and specified separately. The positive charge pump is tested with V- unloaded. The negative charge pump is tested with V+ supplied from an external source, isolating the negative charge pump. Current draw from either supplied by the reservoir capacitor alone during one half cycle of the clock ...

Page 7

Compact, Dual-Output Charge Pump A substantial voltage difference exists between ( and V for the positive pump, and between and V- if the impedances of the pump capacitors (C1 and C2) are large with ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1997 Maxim Integrated Products ...

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