LM3435

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SNVS724C – JUNE 2011 – REVISED MAY 2013

Pin Descriptions (continued)

Pin

Name

Type

Description

Application Information

28

EN

Input

Enable pin

Internally pull-up. Connect to a voltage lower than 0.2 x VIN to disable the

device.

30, 31, 32

VOUT

Input /

Output voltage

Connect anodes of LEDs to this pin.

Output

33

RT

Input

ON-time control

An external resistor connected from VOUT to this pin sets the main

MOSFET on-time, hence determine the switching frequency.

34, 35, 36

SW

Output

Switch node

Internally connected to the drain of the main N-channel MOSFET and the

P-channel synchronous MOSFET. Connect to the output inductor.

EP

EP

Ground

Exposed Pad

Thermal connection pad, connect to the GND pin.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1)

VALUE / INPUTS

VIN to GND

–0.3V to 6.0V

VOUT, RT to VIN

–0.3V to 5.5V

RLED, GLED, BLED to VIN

–0.3V to 5.5V

SW to GND

–0.3V to 11.5V

SW to GND (Transient)

–2V to 13V (<100 ns)

All other inputs to GND

–0.3V to 6.0V

ESD Rating

±1.5 kV

Storage Temperature

–65°C to +150°C

–40°C to +125°C

(1)

Absolute Maximum Ratings are limits which damage to the device may occur. Operating ratings are conditions under which operation of

the device is intended to be functional. For specifications and test conditions, see the electrical characteristics.

(2)

The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

RECOMMENDED OPERATING CONDITIONS

(1)

VALUE / INPUTS

2.7V to 5.5V

–40°C to +125°C

Thermal Resistance (

(2)

28°C/W

(1)

Absolute Maximum Ratings are limits which damage to the device may occur. Operating ratings are conditions under which operation of

the device is intended to be functional. For specifications and test conditions, see the electrical characteristics.

(2)

So, only when the PC board under end-user environments is similar to the 2L JEDEC board, the corresponding

predict the junction temperature.

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