intersil EL7630 DATA SHEET

®

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EL7630

Data Sheet February 22, 2006

White LED Boost Regulator

The EL7630 represents a high efficiency, constant frequency
PWM regulator for use in white LED driving applications.
With efficiencies up to 86%, the EL7630 operates at 1.35MHz
switching frequency while operating from an input voltage of
between 2.7V and 5.5V. The maximum output voltage of 27V
enables the EL7630 to drive up to 6 LEDs in series. It is also
possible to use the EL7630 to drive LEDs in series/parallel
combination for applications requiring up to 15 LEDs.

Available in the 6 Ld SC-70 and the 5 Ld TSOT packages, the
EL7630 features the same pinout as competitive products
but offers higher efficiency, constant frequency operation. It
is specified for operation over the -40°C to +85°C ambient
temperature range.

Pinouts

EL7630

(6 LD SC-70)

TOP VIEW

LX

GND

FB

LX

GND

FB

1

2

3

EL7630

(5 LD TSOT)

TOP VIEW

1

2

3

6

VIN

5PGND

ENAB

4

5

VIN

ENAB

4

FN7371.1

Features

• Up to 6 LEDs in series

• 27V maximum output

• 2.7V to 5.5V input

• Up to 86% efficient

• 1.35MHz constant frequency

• Enable/PWM dimming control

• Pb-free plus anneal available (RoHS compliant)

Applications

• LED backlighting

• Cell phones

•PDAs

• Handheld devices

Ordering Information

PART NUMBER

(See Note)

EL7630ICZ-T7 BCA 7”

EL7630ICZ-T7A BCA 7”

EL7630IWTZ-T7 BAAC 7”

EL7630IWTZ-T7A BAAC 7”

NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.

PART

MARKING

TAPE &

REEL

(3K pcs)

(250 pcs)

(3K pcs)

(250 pcs)

PACKAGE

(Pb-free)

6 Ld SC-70 P6.049

6 Ld SC-70 P6.049

5 Ld TSOT MDP0049

5 Ld TSOT MDP0049

PKG.

DWG. #

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Copyright Intersil Americas Inc. 2006. All Rights Reserved

EL7630

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Absolute Maximum Ratings (T

Input Voltage (V

LX Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +27V

FB Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V

ENAB Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V

PGND to GND (SC-70 package) . . . . . . . . . . . . . . . . -0.3V to +0.3V

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: T

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V

IN

Electrical Specifications V

PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT

V

IN-MIN

V

IN-MAX

V

I

I

F

OSC

D

MAX

I

LIM

r

DS(ON)

I

LEAK

V

ENAB-HI

V

ENAB-LO

I

ENAB

∆I

LED

FB

FB

IN

/∆V

Minimum Operating Voltage V

Maximum Operating Voltage V

Feedback Voltage TA = 25°C 86 95 104 mV

FB Pin Bias Current 100 nA

Supply Current ENAB = 3V, output not switching 0.6 1.0 mA

Switching Frequency TA = 25°C 0.8 1.35 1.8 MHz

Maximum Duty Cycle TA = 25°C 85 90 %

Switch Current Limit TA = 25°C 280 350 mA

Switch On Resistance ILX = 100mA 750 mΩ

Switch Leakage Current VLX = 27V 0.01 1 µA

ENAB Voltage High 2.5 V

ENAB Voltage Low 0.6 V

ENAB Pin Bias Current 1µA

Line Regulation VIN = 2.7V to 5V 0.2 %/V

IN

A

= 3V, V

IN

= 25°C)

ENAB

Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +125°C

Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C

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

= TC = T

J

A

= 3V, over temperature from -40°C to 85°C unless otherwise specified.

= 16V, I

OUT

= 25V, I

OUT

ENAB = 0V 1 µA

= 20mA 2.7 V

LED

= 20mA 5.5 V

LED

80 95 115 mV

0.8 1.35 1.9 MHz

82 90 %

250 350 mA

2

FN7371.1

February 22, 2006

Typical Application

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EL7630

L1

22µH

V

IN

2.7V~5.5V

C1

1µF

OFF/ON

VDD

LX

EL7630

ENAB FB

GND

D1

R

SET

4.75Ω

FIGURE 1. TYPICAL APPLICATION CIRCUIT AND EFFICIENCY vs LED CURRENT

Typical Performance Curves

0.7

0.6

0.5

0.4

0.3

0.2

0.1

QUIESCENT CURRENT (mA)

0

0123456

V

(V)

IN

LEDs

C2

0.22µF

90

85

80

75

EFFICIENCY (%)

70

65

0 5 10 15 20 25 30

LED CURRENT (mA)

24.6

24.595

24.59

24.585

24.58

24.575

24.57

LED CURRENT (mA)

24.565

24.56
0 5 10 15 20

V

(V)

OUT

FIGURE 2. QUIESCENT CURRENT (ENABLE)

24.7

24.68

24.66

24.64

24.62

24.6

LED CURRENT (mA)

24.58

24.56

2.5 3 3.5 4 4.5 5 5.5
(V)

V

IN

FIGURE 4. LINE REGULATION FIGURE 5. SWITCHING FREQUENCY vs TEMPERATURE

3

FIGURE 3. LOAD REGULATION (V

1.34

1.32

1.3

1.28

1.26

1.24

1.22

SWITCHING FREQUENCY (MHz)

1.2

-40 10 60
TEMPERATURE (°C)

=4V)

IN

February 22, 2006

FN7371.1