CAT32RD4 datasheet(2/14 Pages) CATALYST

Part #	CAT32RD4

Description	CMOS White LED Driver

Download	14 Pages

Scroll/Zoom	100%

Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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2 / 14 page

CAT32

2

Doc. No. 5001, Rev. AC

CAT32

1

2

3

6

5

4

SW

GND

LED

VIN

SHDN

RSET

θ

6-Lead SOT-23

1mm maximum height

[Free Air]

ORDERING INFORMATION

PIN CONFIGURATION

PIN DESCRIPTIONS

Pin Number

SOT23

TDFN

Name

Function

1

8

SW

Switch pin. This is the drain of the internal power

switch. For minimum EMI, minimize the trace

area connected to this pin.

2

5

GND

Ground pin. Connect pin 2 to ground.

3

6

LED

LED (cathode) connection pin.

4

RSET

RESET pin. A resistor connected from pin 4 to

ground sets the LED current. This pin is also

used to dim the LEDs.

53

SHDN

Shutdown pin.

6

2

VIN

Input supply pin. This pin should be bypassed

with a capacitor to ground. A 4.7

µF capacitor

mounted close to the pin is recommended.

—

1

Power

Power Ground

Ground

(Top View)

TDFN Package: 3mm x 3mm

0.8mm maximum height

(RD4)

1

2

3

4

8

7

6

5

SW

NC

LED

GND

Power

GROUND

VIN

SHDN

RSET

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3

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