Max 1686

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General DescriptionThe M A X168 6 provides p ow er for dual-voltag e sub-scriber ID m od ule (SIM ) cards in portab le ap plicationssuch as G SM cellular phones. D esigned to reside in theportable unit (cellular phone handset), the 1M H z chargepum p converts a 2.7V to 4.2V inp ut to reg ulated 5V out-

put. The M A X1686H has a nom inal output voltag e of5.0V , w hile the M A X1686 is set to 4.75V to red uce SIM -card current drain. The charge p um p has only 45A qui-escent sup ply current, w hich red uces to 3A w hen a

3V-cap able SIM card is being pow ered and the chargepum p is disabled. A n internal input/output shortingsw itch provides p ow er for 3V SIM cards.

The M A X1686/M A X1686H req uire only three external

capacitors around their space-saving , thin (1m m ) 8-pinM A X p ackages.

Applications

G SM C ellular Phones

PC S Phones

Portab le P O S Term inals

Personal C om m unicators

Features 2.7V to 4.2V Input Range

12mA min Charge-Pump Output Current

45A Quiescent Supply Current

0.1A Supply Current in Shutdown Mode

5.0V Regulated Charge-Pump Output (MAX1686H)

4.75V Regulated Charge-Pump Output (MAX1686)

Input-Output Shorting Switch for 3V Cards

Small External Components

(Uses a 0.047F, 0.1F, and a 2.2F Capacitor)

Output Driven to Ground in Shutdown Mode Super-Small 8-Pin MAX Package

Soft-Start and Short-Circuit Protection

MAX1686/MAX

1686H

3V to 5V RegulatingCharge Pumps for SIM Cards

________________________________________________________________Maxim Integrated Products 1

1

2

3

4

8

7

6

5

OUT

CXP

CXN

PGNDGND

IN

SHDN

3/5

MAX1686

MAX1686H

MAX

TOP VIEW

MAX1686

MAX1686H

IN

CXN CXP

GND PGND

CIN

INPUT2.7V TO 4.2V

OUTPUTVINOR 5V/20mA

CX

COUT

SHDN

3/5

OUT

Typical Operating Circuit

19-1376; R ev 1; 12/98

PART

MAX1686EU A -40C to + 85C

TEMP. RANGE PIN-PACKAGE

8 M A X

Pin Configuration

Ordering Information

MAX1686HEU A -40C to + 85C 8 M A X

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS(VIN = V SHDN = 3.3V , 3/5 = G N D, C X = 0.22F, C O U T = 10F (see A pplications Inform ationsection to use sm aller capacitors),

TA = TM IN to TM A X, unless otherw ise noted. Typical values are at TA = + 25C .) (N ote 1)

IN , O U T,SHDN, 3/5to G N D .....................................-0.3V to + 6V

C XP to G N D ..............................................-0.3V to (VO U T + 0.3V)

C XN to G N D ................................................-0.3V to (VIN + 0.3V)

PG N D to G N D ......................................................-0.3V to + 0.3V

O U T Short C ircuit to G N D ..........................................C ontinuous

IN -to-O U T C urrent...............................................................50m A

C ontinuous P ow er D issipation (TA = + 70C )

8-Pin M A X (derate 4.1m W /C ab ove + 70C).............330m W

O perating Tem perature R ang e

M A X1686EU A /M A X1686H EU A ........................-40C to + 85C

Junction Tem perature ......................................................+ 150C

Storag e Tem perature R ange .............................-65C to + 165C

Lead Tem perature (soldering, 10sec).............................+ 300C

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Voltage R ange 2.7 4.2 V

Inp ut U nd ervoltag e-Lockout

Threshold Voltag e0.8 1.2 1.6 V

Q uiescent Sup ply C urrent

C harge pum p enabled,

no load, 3/5= G N D A

C harge pum p disabled , no load , 3/5= IN

Shutdow n Supp ly Current VIN = 3.6V ,SHDN= G N D 0.1 5

VO U T O utput Voltage

4.55 4.75 5.25

V3/5= VIN = 3.0V 2.5 5

O U T Short-C ircuit C urrent 3/5= G N D or IN 20 100 200 m A

Logic Inp ut Low Voltag e SHDN, 3/5 0.5 VIN 0.3 VIN V

Logic Inp ut H igh Voltag e SHDN, 3/5 0.7 VIN 0.5 VIN V

Logic Inp ut Leakag e C urrent SHDN, 3/5= G N D or IN 0.1 1 A

4.75 5.00 5.25

O U T D ischarge Sw itch O n-R esistance 3/5= G N D or IN ,SHDN= G N D 80 200

IN -to-O U T Sw itch O n-R esistance

TA = + 25C 800 1000 1200

A

Note 1: Electrical specifications are m easured by p ulse testing and are g uaranteed for a junction tem perature w ithin the op eratingtem perature range, unless otherw ise noted . Lim its are 100% prod uction tested at TA = + 25C. Lim its over the entire op erat-

ing tem perature range are g uaranteed through correlation using Statistical Q uality C ontrol (SQ C ) m ethods and are not pro-

duction tested.

Stresses beyond those listed under Absolute M axim um R ating sm ay cause perm anent dam age to the device. These are stress ratings only, and functional

op eration of the device at these or any other cond itions beyond those ind icated in the operational sections of the specifications is not im plied . Exposure to

ab solute m axim um rating cond itions for extended period s m ay affect device reliab ility.

TA = + 25C 45 100

3 10

C harge-Pum p FrequencyTA = -40C to + 85C 700 1300

kH z

TA = -40C to + 85C 150

3/5= IN VIN

M AX1686

M AX1686H

VIN = 2.7V to 4.2V ,

load = 0 to 12m A

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MAX1686/MAX

1686H


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00.1 100101

EFFICIENCY vs. LOAD CURRENT

(5V M ODE)

30

10

70

50

90

40

20

80

60

MAX1686-

01

LOAD CURRENT (mA)

EFFICIENCY(%)

VIN = 3.6V

VIN = 2 .7VVIN = 3.3V

0

0

EFFICIENCY vs. INPUT VOLTAGE

(5V M ODE)

MAX1686-

TOC2

INPUT VOLTAGE (V)

EFFICIENCY(%)

10

20

30

40

50

60

70

80

90

1 2 3 4 5 6

ILOAD = 10mAILOAD = 1mA

1000

0.10 21 4 6

NO-LOAD INPUT CURRENT

vs. INPUT VOLTAGE (3V MODE)

1

10

100

MAX1686-

03

INPUT VOLTAGE (V)

INPUTCURRENT(A)

3 5

10,000

10 21 4 6

NO-LOAD INPUT CURRENT


10

100

1000

MAX1686-

04

INPUT VOLTAGE (V)

INPU

TCURRENT(A)

3 5

0

2

1

4

3

5

6

0 2 31 4 5 6

OUTPUT VOLTAGE


MAX1686-

07

INPUT VOLTAGE (V)

OUTPUTVOLT

AGE(V)

NO LOAD

3.20

3.24

3.22

3.28

3.26

3.30

3.34

3.32

0 5 10 15 20 25

OUTPUT VOLTAGE

vs. LOAD CURRENT (3V MODE)

MAX1686-

05

LOAD CURRENT (mA)

OUTPUTVOLTAGE(V)

4.700.1 100101

MAX1686 OUTPUT VOLTAGE

vs. LOAD CURRENT (5V MODE)

4.73

4.71

4.77

4.75

4.80

4.74

4.72

4.78

4.79

4.76

MAX1686-

06

LOAD CURRENT (mA)

OUTP

UTVOLTAGE

(V)

VIN = 2.7V

VIN = 3 .3V

VIN = 3.6V

0

2

1

4

3

5

6

0 2 31 4 5 6

OUTPUT VOLTAGE


MAX1686-

08

INPUT VOLTAGE (V)

OUTPUTVOLTAGE(V)

NO LOAD

MAX1686

MAX1686H

2.5s/div

OUTPUT WAV EFORM

(ILOAD= 10mA)

MAX1686-09

VOUT(20mV/div)

5V MODE, AC COUPLED,COUT= 10F 0.1F

Typical Operating Characteristics(See Typical O perating C ircuit, C IN = 0.47F, C X = 0.22F, C O U T = 10F, VIN = 3.3V , TA = + 25C , unless otherw ise noted .)

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Typical Operating Characteristics (continued)(See Typical O perating C ircuit, C IN = 0.47F, C X = 0.22F, C O U T = 10F, VIN = 3.3V , TA = + 25C , unless otherw ise noted .)

25s/div

OUTPUT WAVEFORM

(ILOAD= 1mA)

MAX1686-10

VOUT(20mV/div)

5V MODE, AC COUPLED,COUT= 10F 0.1F

2.5ms/div

LINE-TRANSIENT RESPONSE

MAX1686-11

VIN(500mV/div)

VIN= 2.8V to 3.3V, ILOAD= 10mA, 5V MODE,AC COUPLED

VOUT(50mV/div)

2.5ms/div

LOAD-TRANSIENT RESPONSE

MAX1686-12

ILOAD(10mA/div)

ILOAD = 0 TO 10mA, 5V MODE, AC COUPLED

VOUT(50mV/div)

250s/div

START-UP W AVEFORM

(3V MODE, RL= 500)

MAX1686-13

SHDN(5V/div)

VOUT(1V/div)

0V

1ms/div

SHUTDOWN WAVEFORM

(3V MODE, NO LOAD)

MAX1686-16

SHDN(5V/div)

VOUT(1V/div)

RL= 500

0V

250s/div

START-UP WAVEFORM

(5V MODE, RL= 500)

MAX1686-14

SHDN(5V/div)

VOUT(1V/div)

0V

250s/div

3V M ODE TO 5V MODE

WAVEFORM (RL= 500)

MAX1686-15

3/ 5(5V/div)

VOUT

(1V/div)

0V

1ms/div

SHUTDOWN WAVEFORM

(5V MODE, NO LOAD)

MAX1686-17

SHDN(5V/div)

VOUT(1V/div)

0V

Documents

Max 1686