MAX1682C/D Maxim Integrated, MAX1682C/D Datasheet

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MAX1682C/D

Manufacturer Part Number
MAX1682C/D
Description
Charge Pumps Switched Capacitor Voltage Doublers
Manufacturer
Maxim Integrated
Datasheet
1.MAX1682CD.pdf (9 pages)

Specifications of MAX1682C/D

Function
Step Up
Output Voltage
4 V to 11 V
Output Current
45 mA
The ultra-small MAX1682/MAX1683 monolithic, CMOS
charge-pump voltage doublers accept input voltages
ranging from +2.0V to +5.5V. Their high voltage-con-
version efficiency (over 98%) and low operating current
(110µA for MAX1682) make these devices ideal for
both battery-powered and board-level voltage-doubler
applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. The MAX1682 operates
at 12kHz, and the MAX1683 operates at 35kHz. A typi-
cal application includes generating a 6V supply to
power an LCD display in a hand-held PDA. Both parts
are available in a 5-pin SOT23 package and can deliver
30mA with a typical voltage drop of 600mV.
________________________Applications
19-1305; Rev 3; 11/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Small LCD Panels
Cell Phones
Handy-Terminals
PDAs
C1
5
3
1
Typical Operating Circuit
C1+
C1-
GND
________________________________________________________________ Maxim Integrated Products
VOLTAGE DOUBLER
MAX1682
MAX1683
General Description
Switched-Capacitor Voltage Doublers
OUT
IN
4
2
V
IN
C2
INPUT
SUPPLY
VOLTAGE
OUTPUT
VOLTAGE
2 x V
IN
♦ 5-Pin SOT23 Package
♦ +2.0V to +5.5V Input Voltage Range
♦ 98% Voltage-Conversion Efficiency
♦ 110µA Quiescent Current (MAX1682)
♦ Requires Only Two Capacitors
♦ Up to 45mA Output Current
Note: These parts are available in tape-and-reel only. Minimum
order quantity is 2500 pieces.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
____________________________Features
MAX1682EUK+T -40°C to +85°C
MAX1683EUK+T -40°C to +85°C
PART
TOP VIEW
GND
OUT
C1-
RANGE
1
2
3
TEMP
Ordering Information
SOT23-5
MAX1682
MAX1683
Pin Configuration
PACKAGE
5 SOT23-5
5 SOT23-5
PIN-
5
4
C1+
IN
TOP MARK
ACCM
ACCL
SOT
1

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MAX1682C/D Summary of contents

Page 1

... MAX1683 3 C1- OUT 1 GND VOLTAGE DOUBLER ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ____________________________Features ♦ 5-Pin SOT23 Package ♦ +2.0V to +5.5V Input Voltage Range ♦ 98% Voltage-Conversion Efficiency ♦ 110µA Quiescent Current (MAX1682) ♦ ...

Page 2

Switched-Capacitor Voltage Doublers ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................+6V to -0.3V OUT to GND .......................................................+12V, V OUT Output Current............................................................50mA Output Short-Circuit Duration .................................1sec (Note 1) Continuous Power Dissipation (T = +70°C) A SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW Note 1: ...

Page 3

Switched-Capacitor Voltage Doublers (Typical Operating Circuit +5V 10µF for the MAX1682 and 3.3µF for the MAX1683 noted.) OUTPUT RESISTANCE vs. SUPPLY VOLTAGE MAX1683 3.3μF 60 ...

Page 4

Switched-Capacitor Voltage Doublers (Typical Operating Circuit +5V 10µF for the MAX1682 and 3.3µF for the MAX1683 noted.) MAX1682 OSCILLATOR FREQUENCY vs. TEMPERATURE 12 12 3.3V IN ...

Page 5

... Positive Terminal of the Flying 5 C1+ Capacitor _______________Detailed Description The MAX1682/MAX1683 capacitive charge pumps double the voltage applied to their input. Figure 1 shows a simplified functional diagram of an ideal volt- age doubler. During the first half-cycle, switches S1 and S2 close, and capacitor C1 charges to V the second half cycle, S1 and S2 open, S3 and S4 ...

Page 6

Switched-Capacitor Voltage Doublers Conversion losses occur during the charge transfer between C1 and C2 when there is a voltage difference between them. The power loss is: ⎡ ⎛ ⎢ ⎜ CONVERSION LOSS ⎢ ...

Page 7

Switched-Capacitor Voltage Doublers Cascading Devices Devices can be cascaded to produce an even larger voltage (Figure 3). The unloaded output voltage is nom- inally ( where n is the number of voltage IN doublers used. ...

Page 8

Switched-Capacitor Voltage Doublers For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the ...

Page 9

... 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. 9 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products ...

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