SEMTECH SC603 Technical data

1 www.semtech.com

POWER MANAGEMENT

SC603

CHARGE PUMP REGULATOR WITH
SELECTABLE 5.0V/4.5V OUTPUT

November 2, 2004

Description Features

Applications

Typical Application Circuit

The SC603 is a versatile charge pump designed for use
in battery operated power supply applications. The wide
input range is matched for Li-Ion battery applications.
Only two tiny ceramic bucket capacitors are required, and
the inductorless implementation provides a reduced-EMI
solution. Low noise mode switching circuitry and con­stant output current allow the use of extremely small
input and output capacitors.

The SC603

charge pump regulator can be used for ap­plications that require up to 200mA of output current
with a 4.5V output. The 5.0V output version provides up
to 160mA of output current.

Compared to a switch mode regulator, the SC603 offers
a solution with less cost, area, noise and complexity.

 Small size - MLP Micro 10 lead 3x3mm package
 Selectable 5.0V or 4.5V output voltage
 200mA available with 4.5V output
 160mA available with 5.0V output
 Short circuit protection
 Soft Start function
 Shutdown current <2µA
 Selectable fixed frequencies of 262kHz & 650kHz
 Low ripple
 Regulated to +/-5%
 Ease of use

 Cellular phones
 LED photo flash for cellular phones
 LED backlighting
 PDA power supplies
 Portable electronics
 Electronic books
 Wireless web appliances

Cin

1.0uF

2.7V to 6.5V

Cbucket1

1.0uF

Cbucket2

1.0uF

VIN

EN

VSEL

FSEL

GND

CF2-

CF2+

CF1-

CF1+

VOUT

3

6

4

5

8

7

10

9

2

1

U1

S

C

6

0

3

Cout

1.0uF

UP TO 10 LEDS

4.5V or 5.0V

查询SC603供应商

2 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Absolute Maximum Ratings

Electrical Characteristics

retemaraPlobmySmumixaMstinU

egatloVylppuSV

NI

0.7+ot3.0-V

egatloVtuptuOV

TUO

0.7+ot3.0-V

V

TUO

noitaruDtiucriCtrohSCSetinifednI

oTnoitcnuJ,ecnatsiseRlamrehT

tneibmA

)dohteMdradnatS15DSEJ(

θ

AJ

13W/C°

tneibmAgnitarepOT

A

58+ot04-C°

egnaRerutarepmeTnoitcnuJT

CJ

051+ot04-C°

egnaRerutarepmeTegarotST

GTS

051+ot56-C°

erutarepmeTwolfeRRIkaeP

RTLMI306CS

T

DAEL

042C°

erutarepmeTwolfeRRIkaeP

TRTLMI306CS

T

DAEL

062C°

retemaraPlobmySsnoitidnoCNIMPYTXAMstinU

egatloVylppuStupnIV

NI

5.25.6V

tnerruCtnecseiuQI

Q

I,zHk262=.qerF

TUO

V,Am0=

NI

V7.3=0.14.1Am

I,zHk056=.qerF

TUO

V,Am0=

NI

V7.3=1.28.2Am

0=elbanE2Aµ

egatloVtuptuOV

TUO

htiwnoitalugeRdaoLcitatS

1=LESV

57.40.552.5V

htiwnoitalugeRdaoLcitatS

0=LESV

572.45.4527.4V

tnerruCtuptuOI

TUO

V<V2.3,1=LESV

NI

V5.5<051Am

V<V2.3,1=LESV

NI

V5.5<

T

A

04-=

o

07otC

o

C

061Am

V<V2.3,0=LESV

NI

V5.5<091Am

V<V2.3,0=LESV

NI

V5.5<

T

A

04-=

o

07otC

o

C

002Am

V<V58.2,1=LESV

NI

V5.5<06Am

V<V58.2,0=LESV

NI

V5.5<021Am

Unless specified: TA = -40°C to 85°C, CIN=C

BUCKET

= 1.0µF (ESR = 0.1Ω), C

OUT

=1.0µF (ESR = 0.1Ω), VIN= 2.85V to 5.5V

3 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Note: (1) Peak to peak output ripple voltage with C

OUT=CBUCKET

=1µF and X5R dielectric

(2) Guaranteed by design

(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.

retemaraPlobmySsnoitidnoCNIMPYTXAMstinU

ycneuqerFpmuP

f

PMUP

0=LESF,1=elbanE%51-262%51+zHk

1=LESF,1=elbanE%02-056%02+zHk

emiTnoitisnarTedoMycneuqerF

T

KCOLC

ycneuqerfenomorfemitnoitisnarT
edomycneuqerfrehtoynaotedom

ngisedybdeetnaraug

1doireP

tnerruCtiucriCtrohSI

CS

V

TUO

I,V0=

TUOI=NI

006Am

dlohserhThgiHtupnIV

HI

)LESF,LESV,elbanE(sniptupnillA3.1V

dlohserhTwoLtupnIV

LI

)LESF,LESV,elbanE(sniptupnillA4.0V

tnerruChgiHtupnII

HI

)LESF,LESV,elbanE(sniptupnillA01Aµ

tnerruCwoLtupnII

LI

)LESF,LESV,elbanE(sniptupnillA01Aµ

otyrettaBmorfycneiciffErewoP

tuptuOpmuPegrahCdetalugeR

η

V

NI

V,V3.3=

TUO

I,V0.5=

TUO

Am06=

zHk262=.qerF

0.57%

V

NI

V,V3.3=

TUO

I,V0.5=

TUO

Am06=

zHk056=.qerF

5.47%

egatloVelppiRtuptuOV

PP

I,zHk262=qerf

TUO

Am06=

)2(,)1(

5254Vm

Unless specified: TA = -40°C to 85°C, CIN=C

BUCKET

= 1.0µF (ESR = 0.1Ω), C

OUT

=1.0µF (ESR = 0.1Ω), VIN= 2.85V to 5.5V

4 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Pin Configuration

CF1+

TOP VIEW

10

9

8

7

6

5

1

2

3

4

VOUT

VIN

FSEL

VSEL

CF1-

GND

CF2+

CF2-

EN

Block Diagram

ECIVEDEGAKCAP

)1(

TRTLMI306CS

)2(

mm3x301-PLM

RTLMI306CSmm3x301-PLM

BVE306CSdraoBnoitaulavE

Ordering Information

Note:

(1) Available in tape and reel only. A reel contains 3000 devices.

(2) Lead free product.

Pin Descriptions

niPemaNniPnoitcnuFniP

1TUOVV5.4roV0.5otdetalugeregatlovtuptuO

2+1FC1roticapactekcubfolanimretevitisoP

3NIVV5.6otV5.2morfgnignaregatlovtupnI

4LESF

;zHk262=qerf,0=LESF.ycneuqerflanoitarepoehtgnitcelesroftupnicigoL

zHk056=qerf,1=LESF

5LESV

,0=LESV;V5=TUOV,1=LESV.egatlovtuptuoehtgnitcelesroftupnicigoL

V5.4=TUOV

6NE .woltesnehwAu2nahtsselsitnerrucsaiB.elbanehgihevitcA

7-2FC2roticapactekcubfolanimretevitageN

8DNGdnuorG

9-1FC1roticapactekcubfolanimretevitageN

01+2FC2roticapactekcubfolanimretevitisoP

TdaPlamrehT

toN.saivelpitlumgnisuenalpdnuorgottcennoC.sesoprupgniknistaehrofdaP

.yllanretnidetcennoc

MLP10: 3X3 10 LEAD

EN

FSEL

VSEL

GND

VIN

6

5

4

8

3

MODE

SELECT

DRIVER S

SWITCH

BLOCK

TIMER

COMPARATORS

VIN
VOUT
VREF

VIN

CF1+

CF1-

CF2+

CF2-

VOUT

2

9

10

7

1

EN

OSC

650kHz or 262kHz

5.0V or 4.5V

T

5 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

η

VOIO⋅

V

IN2IO

⋅ IQ+

()

⋅

Applications Information

Charge Pump Function for Low Ripple

The SC603 uses a voltage doubler circuit which is imple­mented with two switched or ‘bucket’ capactors. Most
charge pump doublers use only one bucket capacitor.
Two bucket capacitors switching on alternate phases
greatly reduce the output ripple voltage.

Over-Voltage Protection for Low Voltage Capacitors

The output is prevented from exceeding 6.0V. This fea­ture allows the use of 6.3V ceramic capacitors.

Comparison with Other Regulation Methods

In many instances, a charge pump regulator is the best
choice for portable power applications. These regula­tors offer many advantages over switch mode regula­tors. A smaller bill of materials, less layout area, lower
component height, less noise, no EMF, and less overall
circuit cost are typical reasons to use this type of regula­tion. The efficiency of a charge pump regulator often
approaches and in some cases exceeds the efficiency
of a switch mode regulator.

Inductors are often the largest and most expensive dis­crete component in a design. There are no inductors
used in the SC603, so the inductor’s cost and layout
area are eliminated. The noise and EMF associated with
the inductor are also eliminated.

The SC603’s fixed frequency harmonics are an advan­tage in portable communications equipment, such as
cellular telephones. The SC603 has distinct frequen­cies of operation, so the harmonics are predictable. The
harmonics are not fixed in a switch mode regulator.
Switch mode regulators have harmonics which vary due
to the pulse width modulation used to regulate the out­put. Varying harmonics can be a problem because it may
be more difficult to ensure acceptable noise perfor­mance over the entire operating range.

Many switch mode regulators have increased voltage
ripple on the output during pulse skipping mode due to
the fact that there are large periods of time when no
current is supplied to the output. The SC603 supplies
current to the output continuously, so the voltage ripple
is less than a switch mode regulator, even with greatly
reduced output capacitance.

Frequency Selection

The FSEL input is for frequency selection. A logic High
level at this input will set the clock frequency to 650kHz,
while a logic Low sets the clock to 262kHz. Input from a
µP or other device may be used to change the charge
pump frequency at any time. The optimal frequency will
depend upon the capacitor values, the load current, and
the exceptable amount of output ripple.

Ripple Performance

Examples of the output ripple, charge pump frequency
and capacitor size are listed in Table 2 Ripple Perfor­mance.

Efficiency

Efficiency for the SC603 is defined as,

=

where VO = output voltage

IO = output current
VIN = input voltage
IQ = quiescent current [from Electrical Charac-

teristics on page 2]

6 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

rerutcafunaMrebmuNtraP]Fu[ecnaticapaCepyTcirtceleiDeziSegakcaPAIE

egatloV

gnitaR

XVAK501CZ50800.1R7X5080V01

cinosanaPK501J0BV1JCE0.1R5X2040V3.6

KDT501A1R5X8061C0.1R5X3060V01

KDTZ601A1V5Y2021C0.1R5X5080V01

Table 2 -Ripple Performance

V

TUO

]zHk[.qerF]Am[tuoI

]p-pVm[elppiRtupuO

C

TUO

]Fu[C

TEKCUB

]Fu[

V0.5

2620015211

0560015111

2620510511

0560515211

V5.4

2620015211

0560015111

2620020611

0560020311

Calculating Power Dissipation

The power dissipated by the SC603 is calculated as,

=

=

Short Circuit and Over Temperature Protection

The output is current limited to 600mA to protect against
short circuit conditions. Over temperature protection is
also provided.

Design and Layout Considerations

The layout should be patterned after the evaluation board
gerber plots shown on page 10. The center pad “ther­mal slug” is not internally connected to ground, but is
connected to ground in the layout through a via centered
on the pad and connecting to the ground plane. Pin 8 is
then routed directly to the center pad. A good ground
plane connection is important to make effective use of
the low thermal resistance of the MLP package.

P

INPOU

T

−

P

DPD

VIN2 IO⋅ IQ+

(

)

⋅ VOIO⋅−

Suggested Capacitors

Table 3 is a short list of some of the manufacturers and
types of multilayer ceramic capacitors that are suggested
for the SC603.

Table 3 -Suggested Capacitors

7 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Typical Characteristics

Efficiency vs. Line Voltage

40.0%

45.0%

50.0%

55.0%

60.0%

65.0%

70.0%

75.0%

80.0%

85.0%

3.000 3.200 3.400 3.600 3.800 4. 000 4.200

5V, 150mA Output

4.5V, 200mA Output

Efficiency vs. Load

0.0%

10.0%

20.0%

30.0%

40.0%

50.0%

60.0%

70.0%

80.0%

0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 180.0 200.0

Load Current [mA]

Efficiency [%]

5V Output, 3.8V Input

5V Output, 3.2V Input

4.5V Output, 3.8V Input

4.5V Output, 3.2V Input

Load Regulation

4.300

4.400

4.500

4.600

4.700

4.800

4.900

5.000

0.0 20.0 40.0 60. 0 80.0 100.0 1 20.0 140. 0 160. 0 180.0 200.0

Load Current [mA]

Output Voltage [V]

5V Output, 3.8V Input

4.5V Output, 3.8V Input

5V Output, 3.2V Input

4.5V Output, 3.2V Input

Line Regulation

4.200

4.300

4.400

4.500

4.600

4.700

4.800

4.900

5.000

3.000 3.500 4.000 4.500 5.000 5.500 6.000

Input Voltage [V]

Output Voltage [V]

5V, 150mA Output

4.5V, 200mA Output

Efficiency vs. Input Voltage

Load Regulation

Efficiency vs. Load Current

Line Regulation

8 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Quiescent Currrent

0.500

0.700

0.900

1.100

1.300

1.500

1.700

1.900

2.100

2.300

2.500

2.700 3.200 3.700 4. 200 4.700 5.200

Input Voltage [V]

Quiescent Current [mA]

Vo=4.5, 262kHz

Vo=5.0V, 262kHz

Vo=4.5V, 650kHz

Vo=5.0V, 650kHz

Quiescent Current

Ripple for 150mA, 5V Output

Startup Conditions for 4.5V Output

Startup Conditions for 5.0V Output

100Hz PWM for 4.5V Application

100Hz PWM for 5.0V Application

9 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Evaluation Board Schematic

Evaluation Board Schematic

The evaluation board has a monostable multivibrator cir­cuit to provide a pulse for demonstrating the flash circuit
function. Remove jumpers JP4 and JP5 to disable the
timing circuit when not in use to save battery current
used by R11 through the 555 IC. To adjust the pulse on­time, adjust potentiometer R11. To activate the flash
circuit, depress switch S1.

10 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Evaluation Board Bill of Materials

Evaluation Board Gerber Plots

ReferenceReference

ReferenceReference

Reference

ValueValue

ValueValue

Value

CommentComment

CommentComment

Comment
U1 SC603 MLP -Micro 10 lead 3x3mm.
C1, C2, C3, C4 1.0uF Ceramic, low ESR type, voltage of 6.3V rating is acceptable for all capacitors.
C5 10uF This extra capacitor supports usage of long power leads from a benchtop supply.
R1 through R10 - Add limiting resistors to meet the requirements of the application on 0805 pads.
D1 through D10 - Add white or blue LEDs to meet the requirements of the application on 1206 pads.

yyww = Datecode (Example: 0452)

Top Marking

Marking Information

Top View Bottom View

603

yyww

11 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Contact Information

Land Pattern- MLP-Micro 10

Outline Drawing - MLP-10

MIN

aaa
bbb

b

e
L

N

D

C

E

A1
A2

A

DIM

MILLIMETERS

NOM

DIMENSIONS

MAXNOM

INCHES

MIN MAX

.114 .118 .122 2.90 3.00 3.10

-

-

-

-

(LASER MARK)

INDICATOR

PIN 1

1N2

NOTES:

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS.2.

1.

.003

.007

.042

10

.009

.048

-

.000

.031

(.008)

0.08

0.23

10

.011

.052

0.18

1.06

.039

-

.002-0.00

0.80

1.31

0.30

1.21

-

0.05

1.00

(0.20)

.004 0.10

0.50 BSC.020 BSC

0.30.012 .020.016 0.40 0.50

A

aaa

C

A2

SEATING
PLANE

A1

A

bxN

bbb C A B

B

e

C

C

D

LxN

E

E

.074 .079 .083 1.87 2.02 2.12

12 2004 Semtech Corp. www.semtech.com

SC603

POWER MANAGEMENT

Land Pattern - MLP-10

Semtech Corporation

Power Management Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: [phone] FAX [phone]

Contact Information

.087

.055

2.20

1.40

.150

.020
.012
.037

3.80

0.30

0.95

0.50

(.112)

.075 1.90

(2.85)

K

H

X

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.

NOTES:

1.

INCHES

DIMENSIONS

G

K

H

X
Y

P

Z

C

DIM MILLIMETERS

Y

Z

G

(C)

P