LM3557SDX-2

$0.82

Description：IC LED DRIVER RGLTR 800MA 8WSON
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR)

SKU:864499885559 Category: LED Drivers IC Brand: Texas Instruments

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Product introduction

LM3557SDX-2 is listed in the LED Driver IC range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC LED DRIVER RGLTR 800MA 8WSON. Review the specifications below when checking this part for your BOM.

LED Driver IC specifications for LM3557SDX-2

Description：IC LED DRIVER RGLTR 800MA 8WSON
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR)
Type：DC DC Regulator
Topology：Step-Up (Boost)
Internal Switch(s)：Yes
Number of Outputs：1
Voltage - Supply (Min)：2.7V
Voltage - Supply (Max)：7.5V
Voltage - Output：-
Current - Output / Channel：800mA (Switch)
Frequency：1.2MHz
Dimming：-
Applications：Backlight
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：8-WFDFN Exposed Pad
Supplier Device Package：8-WSON (3x3)
Grade：-
Qualification：-

LED Driver IC datasheet and documents for LM3557SDX-2

LM3557SDX-2

LED Driver IC Overview

The LM3557SDX-2 is a step-up DC-DC converter designed for white LED applications. It features an internal switch capable of delivering 800mA output current. The device operates within a supply voltage range of 2.7V to 7.5V and utilizes a switching frequency of 1.2MHz. It is housed in an 8-WSON package suitable for surface mount installation. The component supports an operating temperature range from -40°C to +85°C.

LED Driver IC Feature Summary

Integrated step-up (boost) DC-DC regulator topology with built-in power switch
Single output channel providing up to 800mA switch current capability
I2C interface for digital control and configuration

LED Driver IC Applications

White LED backlight drivers
Mobile phone display illumination
Portable electronic device lighting systems

LED Driver IC Procurement Notes

Verify the exact suffix designation, as the LM3557 series includes variants like LM3557SD-2 and LM3557SDX-2/NOPB. Confirm that the specific part number matches the required packaging and pinout specifications. Check for obsolescence status, as this model may be discontinued or replaced by newer generations in the Texas Instruments portfolio. Ensure compatibility with existing I2C bus configurations.

LED Driver IC Selection Notes

Select this component for applications requiring a compact boost converter solution for white LEDs. The 800mA current rating suits medium-brightness backlighting needs. Consider the 1.2MHz frequency for balancing efficiency and external component size. Verify that the input voltage range aligns with the system's power source. The WSON package offers a small footprint for space-constrained designs.

LED Driver IC Part Context

This device belongs to the LM355x family of LED drivers from Texas Instruments. It is related to the LM3553, which offers higher current capabilities. The LM3557 series focuses on efficient step-up conversion for single-channel white LED strings. It represents a transition from older National Semiconductor designs acquired by TI.