# LM3433SQX/NOPB (Component)

## Description

High\-Brightness LED Driver Controller – Adaptive constant on\-time DC\-DC buck LED driver controller for high\-power LED lighting, architectural lighting, automotive illumination, signage, and industrial lighting applications\. Designed to drive external N\-channel MOSFETs in a constant\-current buck topology, supporting output currents greater than 6 A\. Operates with a 3\.0 V to 5\.8 V control supply \(VIN\) and a −9 V to −14 V gate\-drive supply \(VEE\), with switching frequencies up to 1 MHz\. Features high\-frequency PWM dimming, analog brightness adjustment, 60 mV typical current\-sense reference, adaptive constant on\-time control, soft\-start, cycle\-by\-cycle current limiting, integrated high\-side and low\-side MOSFET gate drivers, and thermal shutdown\. Specified for operation over a −40°C to \+125°C junction temperature range and housed in a 24\-pin WQFN \(4 × 4 mm\) package\. This device is in Lifetime Buy \(LIFEBUY\) status and is not recommended for new designs\.

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## Component Details

- **Owner:** silicon\-yard
- **Created:** 7/24/2026
- **Last Updated:** 7/24/2026
- **Visibility:** Public
- **Symbol Style:** parametric\-v1
- **Manufacturer Name:** Texas Instruments
- **Manufacturer Part Number:** LM3433SQ
- **Part Type:** Integrated Circuit
- **Datasheet URL:** https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/a6b09849628cea7374bc54fda17b3f0d337e164305d40196f7286aa22b180986\.pdf

- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** Texas Instruments
- **MPN:** LM3433SQ
- **Package / Case Code:** 24\-WQFN
- **Pin Count:** 25
- **Logic Function:** AND
## Pins

| Pin | Name | Type |
|-----|------|------|
| 1 | TON | Unspecified |
| 2 | ADJ | Unspecified |
| 3 | EN | Unspecified |
| 4 | DIM | Unspecified |
| 5 | VIN | Unspecified |
| 6 | CGND | Unspecified |
| 7 | VEE | Unspecified |
| 8 | COMP | Unspecified |
| 9 | NC | Unspecified |
| 10 | SS | Unspecified |
| 11 | NC | Unspecified |
| 12 | NC | Unspecified |
| 13 | LS | Unspecified |
| 14 | LO | Unspecified |
| 15 | VCC | Unspecified |
| 16 | BST | Unspecified |
| 17 | HO | Unspecified |
| 18 | HS | Unspecified |
| 19 | DIMR | Unspecified |
| 20 | DIMO | Unspecified |
| 21 | BST2 | Unspecified |
| 22 | NC | Unspecified |
| 23 | CSN | Unspecified |
| 24 | CSP | Unspecified |
| 25 | EP | Unspecified |

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