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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Diodes Incorporated ZXLD1362QET5TA

Name: ZXLD1362QET5TA
Brand: Diodes Incorporated
SKU: ZXLD1362QET5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXLD1362QET5TA

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: SOT-23-5 Thin, TSOT-23-5

Datasheet:: ZXLD1362QET5TA.pdf

Description:: IC LED DRVR RGLTR PWM 1A TSOT25

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Inventory:8,120

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Product details

Overview

ZXLD1362QET5TA from Diodes Incorporated is an AEC-Q100 Grade 1 qualified continuous-mode inductive step-down LED driver IC with integrated 1A NDMOS switch and high-side current sensing. It operates from 6V to 60V input, delivers up to 1A adjustable output current for series-connected LEDs, and supports dual-mode brightness control via DC voltage or PWM on the ADJ pin. Used in automotive exterior lighting including headlamps and DRLs where ambient operation up to +125°C is required.

For engineers reviewing the ZXLD1362QET5TA datasheet, ZXLD1362QET5TA pinout, ZXLD1362QET5TA application, or ZXLD1362QET5TA equivalent, key selection considerations include its 100mV current-sense threshold accuracy, TSOT25 thermal resistance (θ_JA = 82°C/W), 1.25V internal reference, 0.2V shutdown threshold, and AEC-Q100 qualification for automotive powertrain-adjacent systems.

Technical Context

The ZXLD1362QET5TA implements a self-oscillating buck topology using internal comparator hysteresis (±10% of V_ADJ) to regulate average LED current by modulating LX switch duty cycle. Its current-sense architecture references V_SENSE to VIN-not ground-enabling high-side sensing without shunt loss in the return path.

Control is implemented through a single multi-function ADJ pin that simultaneously handles on/off sequencing, DC dimming (0.3–2.5V), and low-frequency PWM dimming (up to 1000:1 range). The internal 50kΩ pull-up to V_REF and 14.2kΩ impedance above V_REF+100mV enable predictable external drive interface design.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	6V to 60V - supports 12V/24V/48V automotive battery rails with transient tolerance up to 65V absolute max.
Max Output Current	1A continuous - defined by internal switch R_DS(on) ≤1.0Ω and thermal limits in TSOT25 package.
Current Sense Threshold	100mV ±5mV (typ.) - sets nominal I_OUT = 0.1/RS; enables ±2% output current accuracy with matched RS.
Switching Frequency	300kHz typical (L = 68µH, 3 LEDs) - fixed by internal oscillator; max recommended 625kHz to maintain timing accuracy.
ADJ Pin Shutdown Threshold	0.2V (nom.) - ensures reliable turn-off with margin against noise; quiescent current drops to 65µA.
Junction Temp Range	−40°C to +150°C - validated for AEC-Q100 Grade 1 (−40°C to +125°C ambient) with derating curves provided.
Efficiency	Up to 95% - achieved at mid-load with optimized inductor and low-R_S sense resistor.

Pinout & Package

Package: TSOT25 (Thermally Enhanced Thin Small Outline Transistor, 5-pin, 2.9mm × 1.6mm × 0.8mm, θ_JA = 82°C/W).

Pin/Terminal	Circuit Role	Design Meaning
LX	Drain of integrated NDMOS switch	Connects to inductor and freewheeling diode anode; carries peak switch current up to 1.25A.
GND	Power and signal reference ground	Low-impedance return path for sense resistor, internal regulator, and shutdown circuitry.
ADJ	Multi-function control input	Accepts DC voltage (0.3–2.5V) or PWM for brightness; <0.2V forces shutdown; internal 1.25V reference.
ISENSE	High-side current sense input	Connects to RS resistor between VIN and this pin; measures V_SENSE = I_LED × R_S referenced to VIN.
VIN	Main power input	Supplies internal regulator and switch; requires ≥4.7µF X7R ceramic decoupling close to pin.

Key Features

Feature	Design Value
Single-pin dimming & enable	Eliminates separate EN and DIM lines-reduces BOM count and PCB routing complexity in space-constrained modules.
AEC-Q100 Grade 1 qualification	Validated for automotive under-hood use with guaranteed operation from −40°C to +125°C ambient.
High-side current sensing	Enables direct connection of LED cathode to ground-simplifies thermal layout and avoids ground loop interference.
Internal 1.25V reference	Provides stable dimming reference independent of supply variation; ±50ppm/°C drift supports wide-temp accuracy.
Thermally enhanced TSOT25	82°C/W junction-to-ambient thermal resistance enables 1A operation without heatsink in standard 2-layer PCB layouts.

Applications

Automotive Headlamps

Truck Daytime Running Lights (DRL)

Use Scenario: Constant-current driving of 3–15 white LEDs in adaptive front-lighting systems (AFS) with thermal derating across 12V–48V battery range.

IC Role / Device Role / Timing Role: Primary LED current controller implementing analog+PWM hybrid dimming for beam shaping and glare control.

Use Value: 2% current accuracy ensures consistent lumen output across temperature; AEC-Q100 Grade 1 guarantees reliability in engine bay mounting locations.

Use Scenario: High-brightness, always-on LED string powering commercial vehicle DRLs exposed to vibration, dust, and wide ambient swings.

IC Role / Device Role / Timing Role: Standalone buck controller managing 1A LED load with integrated overtemperature foldback and low-I_Q shutdown.

Use Value: 65µA shutdown current minimizes parasitic drain on vehicle battery during extended parking; 60V input withstands jump-start transients.

Industrial Control Panel Indicators

Off-Highway Equipment Lighting

Use Scenario: Driving high-intensity status indicators on ruggedized HMIs operating in mining or agricultural machinery cabins.

IC Role / Device Role / Timing Role: Robust LED driver supporting 24V nominal input with brown-out protection and ESD-hardened ADJ interface.

Use Value: 500V HBM ESD rating protects against operator touch discharge; 0.2V shutdown threshold ensures clean state transitions in noisy 24V PLC environments.

Use Scenario: Powering sealed-beam auxiliary work lights on excavators and harvesters powered by 24V/36V alternator systems.

IC Role / Device Role / Timing Role: Primary current regulator interfacing with CAN-controlled microcontroller for programmable intensity profiles.

Use Value: PWM-compatible ADJ pin allows seamless integration with existing MCU GPIOs; TSOT25 footprint enables compact conformal-coated module designs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8862SP-13	Fixed 1MHz switching frequency; no internal reference-requires external VREF for dimming; lower max input (40V).	Targeted at consumer lighting; lacks AEC-Q100 qualification and automotive temp range.	Select only for non-automotive cost-sensitive designs where 40V input ceiling is acceptable.
LM3409QMY/NOPB	External MOSFET driver; supports >1A with discrete FET; requires external current sense amp and compensation network.	Used in high-power LED arrays (>3A); higher BOM count and layout sensitivity than ZXLD1362QET5TA's integrated solution.	Choose when system-level thermal management demands remote FET placement or >1A scalability.

Compared with AL8862SP-13 and LM3409QMY/NOPB, the ZXLD1362QET5TA delivers AEC-Q100 compliance, integrated switch + sense, and single-pin control in a thermally optimized 5-pin package-making it optimal for space- and reliability-constrained automotive LED modules where 1A output and 60V operation are mandatory.

Availability

ZXLD1362QET5TA is available at Aetrix Electronics and suitable for automotive lighting, industrial HMIs, and off-highway equipment requiring stable component supply with full AEC-Q100 traceability and long-term production support.

Supply support for ZXLD1362QET5TA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The ZXLD1362 belongs to Diodes' AEC-Q100-qualified LED driver product line, designed specifically for robust, thermally efficient constant-current regulation in automotive exterior lighting and harsh-environment industrial displays.

FAQ

What is the minimum sense resistor value supported by ZXLD1362QET5TA?

The minimum sense resistor is 0.1Ω when the ADJ pin is floating (V_ADJ = V_REF = 1.25V), setting nominal I_OUT = 1A. Using lower values risks exceeding the 1.25A absolute maximum switch current and violating thermal limits in the TSOT25 package. Derating curves on page 16 confirm safe operation only down to 0.1Ω under specified conditions.

Can ZXLD1362QET5TA operate below 6V input?

No-6V is the guaranteed minimum operating input per Recommended Operating Conditions. Although the internal regulator starts at 4.85V (V_SU), the datasheet explicitly states operation below 6V causes excessive heating due to increased R_DS(on) and reduced gate drive, requiring current derating not defined in specifications. Designs must maintain VIN ≥6V for rated performance.

How does PWM dimming achieve 1000:1 range on the ADJ pin?

The 1000:1 range is achieved by applying low-frequency PWM (<300Hz) directly to the ADJ pin, where the device's internal low-pass filter integrates the signal to produce an effective DC control voltage. The comparator's hysteresis and soft-start interaction allow precise current scaling across three decades-verified in Figure 22 (LED Current vs V_ADJ) and confirmed in the "Brightness control range" spec (1000:1, Note 10).

Is the TSOT25 package lead-free and RoHS compliant?

Yes-the ZXLD1362QET5TA is fully RoHS 2 compliant (2011/65/EU), totally lead-free with no purposely added lead, and halogen/antimony-free ("Green" per Diodes' definition: Br <900ppm, Cl <900ppm, Br+Cl <1500ppm, Sb <1000ppm). This is documented in Notes 1–3 of the datasheet and verified on Diodes' quality portal.

ZXLD1362QET5TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-23-5 Thin, TSOT-23-5

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 6V

Voltage - Supply (Max):: 60V

Voltage - Output:: 65V

Current - Output / Channel:: 1A

Frequency:: 1MHz

Dimming:: PWM

Applications:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-25

ZXLD1362QET5TA FAQ

1.How can I place an order for ZXLD1362QET5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXLD1362QET5TA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZXLD1362QET5TA reliable?

The price and inventory of ZXLD1362QET5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXLD1362QET5TA is usually 5 days.

3.What payment methods are accepted for ZXLD1362QET5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXLD1362QET5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXLD1362QET5TA?

ZXLD1362QET5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXLD1362QET5TA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZXLD1362QET5TA?

For technical support, including ZXLD1362QET5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXLD1362QET5TA requirements.

6.How does Aetrix verify that ZXLD1362QET5TA is sourced from the original manufacturer or authorized distributors?

All ZXLD1362QET5TA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZXLD1362QET5TA meets industry standards.

7.What is the process for return or replacement of ZXLD1362QET5TA?

All ZXLD1362QET5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXLD1362QET5TA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZXLD1362QET5TA part is unused and in its original packaging.

Return procedure for ZXLD1362QET5TA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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