Rainbow Electronics MAX1683 User Manual

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

General Description

The ultra-small MAX1682/MAX1683 monolithic, CMOS
charge-pump voltage doublers accept input voltages
ranging from +2.0V to +5.5V. Their high voltage-con­version 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 typi­cal 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

Small LCD Panels

Cell Phones

Handy-Terminals

PDAs

____________________________Features

♦ 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

MAX1682/MAX1683

Switched-Capacitor Voltage Doublers

________________________________________________________________ Maxim Integrated Products 1

OUT

INC1-

15C1+GND

MAX1682
MAX1683

SOT23-5

TOP VIEW

2

34

Pin Configuration

VOLTAGE DOUBLER

C1+

C1-

IN

OUT

GND

INPUT
SUPPLY
VOLTAGE

OUTPUT
VOLTAGE
2 x V

IN

MAX1682
MAX1683

1

3

C1

C2

54

2

V

IN

Typical Operating Circuit

19-1305; Rev 2; 9/00

PART

MAX1682EUK-T

-40°C to +85°C

TEMP.

RANGE

PIN-

PACKAGE

5 SOT23-5

Ordering Information

Note: These parts are available in tape-and-reel only. Minimum
order quantity is 2500 pieces.

MAX1683EUK-T

-40°C to +85°C 5 SOT23-5

SOT

TOP MARK

ACCL

ACCM

MAX1682/MAX1683

Switched-Capacitor Voltage Doublers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= +5.0V, capacitor values from Table 2, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

ELECTRICAL CHARACTERISTICS

(VIN= +5.0V, capacitor values from Table 2, TA= -40°C to +85°C, unless otherwise noted.) (Note 3)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Note 2: Once started, the MAX1682/MAX1683 typically operate down to 1V.

Note 3: Specifications at -40°C to +85°C are guaranteed by design.

IN to GND .................................................................+6V to -0.3V

OUT to GND.......................................................+12V, VIN- 0.3V

OUT Output Current............................................................50mA

Output Short-Circuit Duration .................................1sec (Note 1)

Continuous Power Dissipation (T

A

= +70°C)

SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW

Operating Temperature Range

MAX1682EUK/MAX1683EUK ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

(Note 2)

TA= +25°C

TA= +25°C

I

OUT

= 0mA, TA= +25°C

CONDITIONS

V1Minimum Operating Voltage

µA

230 310

110 145

No-Load Supply Current

8.4 12 15.6
kHz

24.5 35 45.5

Oscillator Frequency

%98 99.9Voltage Conversion Efficiency

UNITSMIN TYP MAXPARAMETER

Note 1: Avoid shorting OUT to GND, as it may damage the device. For temperatures above +85°C, shorting OUT to GND even

instantaneously will damage the device.

MAX1682

MAX1683

R

LOAD

= 10kΩ

TA= +25°C

TA= 0°C to +85°C

V

2.1 1.8 5.5

2.0 1.7 5.5

Supply Voltage Range

MAX1682

MAX1683

TA= +25°C

TA= 0°C to +85°C

I

OUT

= 5mA

20 50

Ω

65

Output Resistance

I

OUT

= 0mA

I

OUT

= 5mA

MAX1683

MAX1682

R

LOAD

= 10kΩ

MAX1683

MAX1682

CONDITIONS

%97Voltage Conversion Efficiency

Ω65Output Resistance

kHz

17.5 57.8

Oscillator Frequency

6.6 18.6

V2.3 5.5Supply Voltage Range

µA

350

160

No-Load Supply Current

UNITSMIN TYP MAXPARAMETER

MAX1682/MAX1683

Switched-Capacitor Voltage Doublers

_______________________________________________________________________________________ 3

10

30

20

60

50

40

80

70

90

1.0 2.5 3.01.5 2.0 3.5 4.0 4.5 5.0 5.5

OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE

MAX1682/83 TOC1

VIN (V)

OUTPUT RESISTANCE (Ω)

MAX1683, C1 = C2 = 3.3µF

MAX1683, C1 = C2 = 10µF

MAX1682, C1 = C2 = 10µF

0

5

10

15

20

25

30

35

40

-40 0-20 20 40 60 80

MAX1682 OUTPUT RESISTANCE

vs. TEMPERATURE

MAX1682/83 TOC02

TEMPERATURE (°C)

OUTPUT RESISTANCE (Ω)

I

LOAD

= 5mA

VIN = 5V

VIN = 3.3V

VIN = 2V

0

5

10

15

20

25

30

35

40

-40 0-20 20406080

MAX1683 OUTPUT RESISTANCE

vs. TEMPERATURE

MAX1682/83 TOC03

TEMPERATURE (°C)

OUTPUT RESISTANCE (Ω)

I

LOAD

= 5mA

VIN = 5V

VIN = 3.3V

VIN = 2V

0

40

20

80

60

100

120

015205 10 253035

MAX1682 OUTPUT RESISTANCE

vs. CAPACITANCE

MAX1682/83 TOC4

CAPACITANCE (µF)

OUTPUT RESISTANCE (Ω)

VIN = 5V

VIN = 3.3V

VIN = 2V

0

200

100

400

300

600

500

700

900

800

1000

010155 2025303540

MAX1683

OUTPUT VOLTAGE RIPPLE

vs. OUTPUT CURRENT

MAX1682/83 TOC07

I

OUT

(mA)

V

RIPPLE

(mV)

C1 = C2 =1µF

C1 = C2 = 3.3µF

C1 = C2 = 10µF

0

15

10

5

25

20

45

40

35

30

50

0 5 10 15 20 25 30 35

MAX1683 OUTPUT RESISTANCE

vs. CAPITANCE

MAX1682/83 TOC05

CAPACITANCE (µF)

OUTPUT RESISTANCE (Ω)

VIN = 2V

VIN = 3.3V

VIN = 5V

0

200

100

400

300

500

600

700

800

010155 2025303540

MAX1682

OUTPUT VOLTAGE RIPPLE

vs. OUTPUT CURRENT

MAX1682/83 TOC06

I

OUT

(mA)

V

RIPPLE

(mV)

C1 = C2 = 3.3µF

C1 = C2 = 10µF

C1 = C2 = 33µF

0

50

100

150

200

250

300

1.0 2.01.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1682/83 TOC09

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

MAX1683

MAX1682

Typical Operating Characteristics

(Typical Operating Circuit, VIN= +5V, C1 = C2 = 10µF for the MAX1682 and 3.3µF for the MAX1683, TA= +25°C, unless otherwise
noted.)