Maxim MAX682ESA, MAX683EUA, MAX684EUA Datasheet

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.

General Description

The MAX682/MAX683/MAX684 charge-pump regula­tors generate 5V from a 2.7V to 5.5V input. They are
specifically designed to serve as high-efficiency auxil­iary supplies in applications that demand a compact
design. The MAX682, MAX683, and MAX684 deliver
250mA, 100mA, and 50mA output current, respectively.

These complete 5V regulators require only one resistor
and three external capacitors—no inductors are need­ed. High switching frequencies (externally adjustable
up to 2MHz) and a unique regulation scheme allow the
use of capacitors as small as 1µF per 100mA of output
current. The MAX683/MAX684 are offered in a space­saving 8-pin µMAX package that is only 1.1mm high,
while the MAX682 is available in an 8-pin SO.

Applications

Flash Memory Supplies
Battery-Powered Applications
Miniature Equipment
PCMCIA Cards

3.3V to 5V Local Conversion Applications
Backup-Battery Boost Converters
3V to 5V GSM SIMM Cards

Features

♦ Ultra-Small: 1µF Capacitors per 100mA of Output

Current

♦ No Inductors Required
♦ 1.1mm Height in µMAX Package (MAX683/MAX684)
♦ Up to 250mA Output Current (MAX682)
♦ Regulated ±4% Output Voltage
♦ 50kHz to 2MHz Adjustable Switching Frequency
♦ 2.7V to 5.5V Input Voltage
♦ 100µA Quiescent Current in Pulse-Skipping Mode
♦ 0.1µA Shutdown Current

MAX682/MAX683/MAX684

3.3V-Input to Regulated 5V-Output
Charge Pumps

________________________________________________________________

Maxim Integrated Products

1

CXN

PGNDGND

1
2

87OUT

CXPSHDN

IN

SKIP

SO

TOP VIEW

3

4

6

5

MAX682

CXN

PGNDGND

1
2

87OUT

CXPSHDN

IN

SKIP

µMAX

3

4

6

5

MAX683
MAX684

Pin Configurations

OUTPUT
5V/250mA

OUT

SHDN

IN

INPUT

2.7V TO 5.5V
SKIP

R

EXT

GND PGND

CXN CXP

MAX682

Typical Operating Circuit

19-0177; Rev 1; 8/98

PART

MAX682ESA
MAX683EUA
MAX684EUA -40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 SO
8 µMAX
8 µMAX

Ordering Information

3.0V ≤ IN ≤ 3.6V for SKIP = 0,

MAX682/MAX683/MAX684

3.3V-Input to Regulated 5V-Output
Charge Pumps

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= 3V, V

SKIP

= 0V, CIN= 1µF, CX= 0.47µF, C

OUT

= 2µF, I

SHDN

= 22µA; I

MAX

= 250mA for MAX682, I

MAX

= 100mA for MAX683,

I

MAX

= 50mA for MAX684; TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

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.

IN, OUT, SHDN, SKIP to GND.................................-0.3V to +6V

PGND to GND.....................................................................±0.3V

CXN to GND ................................................-0.3V to (V

IN

+ 0.3V)

CXP to GND..............................................-0.3V to (V

OUT

+ 0.3V)

Continuous Output Current

MAX682........................................................................300mA

MAX683........................................................................150mA

MAX684..........................................................................75mA

Output Short-Circuit Duration...............................................5sec

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SO (derate 5.9mW/°C above +70°C).................471mW

8-Pin µMAX (derate 4.1mW/°C above +70°C)............330mW

Operating Temperature Range

MAX68_E_A....................................................-40°C to +85°C

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

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

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

Regulation with VIN> 3.6V requires
SKIP = high

RL= 5V/I

MAX

(Note 2)

TA= +25°C

I

SHDN

=4.4µA

MAX682

SKIP = 0, VIN= 3.6V

SKIP = high, 0 ≤ I

LOAD

≤ I

MAX

I

SHDN

= 22µA

CONDITIONS

µs50t

START

Shutdown Exit Time

160 200 250

750 1000 1300

kHz

850 1000 1200

Switching Frequency (Note 2)

mV100

Input Undervoltage Lockout
Hysteresis

V2.0 2.35 2.6

V2.7 5.5V

IN

Input Voltage Range

Input Undervoltage Lockout
Threshold

µA1 50I

SHDN

SHDN Input Current Range

mV630 690 750V

ON, SHDN

SHDN On Bias Voltage

V0.35V

INL, SHDN

SHDN Logic Low Input

mA

250

I

MAX

Maximum Output Current

mA

0.1 0.18

I

Q

No-Load Input Current

%-3∆V

LDR

Load Regulation

UNITSMIN TYP MAXSYMBOLPARAMETER

0°C < TA< +85°C

-40°C < TA< +85°C
0°C < TA< +85°C

150 200 270-40°C < TA< +85°C

MAX683 100
MAX684 50

7.5

SHDN = 0, VIN= 5.5V, V

OUT

= 0

µA0.1 5I

Q, SHDN

Shutdown Supply Current

0 < I

LOAD

≤ I

MAX

;

3.0V ≤ IN ≤ 3.6V for SKIP = 0,

3.0V ≤ IN ≤ 5.5V for SKIP = IN

V4.80 5.05 5.20V

OUT

Output Voltage

2.5

SKIP = VIN= 3.6V

1.7MAX684

MAX683

MAX682

MAX682/MAX683/MAX684

3.3V-Input to Regulated 5V-Output
Charge Pumps

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VIN= 3V, V

SKIP

= 0V, CIN= 1µF, CX= 0.47µF, C

OUT

= 2µF, I

SHDN

= 22µA; I

MAX

= 250mA for MAX682, I

MAX

= 100mA for MAX683,

I

MAX

= 50mA for MAX684; TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: Current into SHDN determines oscillator frequency: R

EXT

(kΩ) = 45000 (VIN- 0.69V) / f

OSC

(kHz)

VIN= 5.5V, V

SKIP

= 0V or 5.5V

VIN= 5.5V

CONDITIONS

µA-1 1I

SKIP

SKIP Input Leakage Current

2.4V

INH, SKIP

SKIP Input Voltage High

V

0.8V

INL, SKIP

SKIP Input Voltage Low

UNITSMIN TYP MAXSYMBOLPARAMETER

__________________________________________Typical Operating Characteristics

(Circuit of Figure 5, VIN= 3.3V, component values from Tables 2 and 3, TA = +25°C, unless otherwise noted.)

0

2

6

MAX682

MAX683

MAX684

4

8

10

2 3 4 5 6

NO-LOAD SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX682 TOC01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

SKIP = HIGH
I

SHDN

= 22µA

5.50

4.00
1 10 100 1000

OUTPUT VOLTAGE vs. LOAD CURRENT

(SKIP = LOW)

MAX682 TOC03

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

4.50

5.00

5.25

4.25

4.75

MAX684

MAX683

MAX682

5.50

4.00
1 10 100 1000

OUTPUT VOLTAGE vs. LOAD CURRENT

(SKIP = HIGH)

MAX682 TOC04

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

4.50

5.00

5.25

4.25

4.75

MAX684

MAX683

MAX682

SKIP = HIGH
I

SHDN

= 22µA

3.50

3.75

4.00

4.25

4.50

4.75

5.00

5.25

5.50

2 3 4 5 6

OUTPUT VOLTAGE

vs. SUPPLY VOLTAGE

MAX682 TOC06

SUPPLY VOLTAGE (V)

OUTPUT VOLTAGE (V)

SKIP = HIGH

SKIP = LOW

10M

10k

0.1 1 10 100

OSCILLATOR FREQUENCY vs.

SHUTDOWN PIN INPUT CURRENT

MAX682 TOC08

SHDN INPUT CURRENT (µA)

OSCILLATOR FREQUENCY (Hz)

100k

1M

100

0.1

0.1 1 10 100

NO-LOAD SUPPLY CURRENT vs.

SHUTDOWN PIN INPUT CURRENT

MAX682 TOC09

SHDN INPUT CURRENT (µA)

NO-LOAD SUPPLY CURRENT (mA)

1

10

MAX683

MAX682

MAX684

SKIP = HIGH

MAX682/MAX683/MAX684

3.3V-Input to Regulated 5V-Output
Charge Pumps

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 5, VIN= 3.3V, component values from Tables 2 and 3, TA = +25°C, unless otherwise noted.)

100

0

1 10 100 1000

MAX682 EFFICIENCY

vs. LOAD CURRENT (SKIP = HIGH)

20
10

MAX682 TOC13

LOAD CURRENT (mA)

EFFICIENCY (%)

50

70
60

40
30

80

90

VIN = 5.0V

VIN = 3.3V

VIN = 3.0V

I

SHDN

= 22µA

100

0

1 10 100 1000

MAX683 EFFICIENCY

vs. LOAD CURRENT (SKIP = HIGH)

20
10

MAX682 TOC14

LOAD CURRENT (mA)

EFFICIENCY (%)

50

70
60

40
30

80

90

VIN = 5.0V

VIN = 3.3V

VIN = 3.0V

I

SHDN

= 22µA

90

0

1 10 100

MAX684 EFFICIENCY

vs. LOAD CURRENT (SKIP = HIGH)

20
10

MAX682 TOC15

LOAD CURRENT (mA)

EFFICIENCY (%)

40
30

50

60

70

80

VIN = 3.0V

VIN = 3.3V

VIN = 5.0V

I

SHDN

= 22µA

200ns/div

OUTPUT WAVEFORM

(SKIP = HIGH)

MAX682 TOC16

50mV/div

SKIP = HIGH, I

SHDN

= 22µA, I

LOAD

= 250mA, MAX682

200ns/div

OUTPUT WAVEFORM

(SKIP = LOW)

MAX682 TOC17

50mV/div

SKIP = LOW, I

LOAD

= 250mA, MAX682

100

0

0.1 1 10 100 1000

MAX682 EFFICIENCY

vs. LOAD CURRENT (SKIP = LOW)

20
10

MAX682 TOC10

LOAD CURRENT (mA)

EFFICIENCY (%)

50

70
60

40
30

80

90

VIN = 3.6V

VIN = 3.3V

VIN = 3.0V

100

0

0.1 1 10 100 1000

MAX683 EFFICIENCY

vs. LOAD CURRENT (SKIP = LOW)

20
10

MAX682 TOC11

LOAD CURRENT (mA)

EFFICIENCY (%)

50

70
60

40
30

80

90

VIN = 3.6V

VIN = 3.3V

VIN = 3.0V

100

0

0.1 1 10 100

MAX684 EFFICIENCY

vs. LOAD CURRENT (SKIP = LOW)

20
10

MAX682 TOC12

LOAD CURRENT (mA)

EFFICIENCY (%)

50

70
60

40
30

80

90

VIN = 3.6V

VIN = 3.3V

VIN = 3.0V