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Diodes Incorporated ZXLD1360ET5TA
- Part No.:
- ZXLD1360ET5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ZXLD1360ET5TA.pdf
- Description:
- IC LED DRV RGLTR PWM 1A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,065
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Product details
Overview
ZXLD1360ET5TA from Diodes Incorporated is a continuous-mode inductive step-down LED driver IC with integrated 1.25A NDMOS switch, high-side current sensing, and AEC-Q100 Grade 1 qualification for automotive ambient operation from −40°C to +125°C. It operates from 7V to 30V input, delivers up to 1A LED output current with ±4% accuracy, and supports DC or PWM brightness control via the ADJ pin - used in automotive exterior lighting, commercial signage, and industrial status indicators.
For engineers reviewing the ZXLD1360ET5TA datasheet, ZXLD1360ET5TA pinout, ZXLD1360ET5TA application, or ZXLD1360ET5TA equivalent, key selection considerations include its TSOT23-5 package thermal resistance (θJA = 82°C/W), 100:1 PWM dimming range at low frequency, 0.2V shutdown threshold on ADJ, and 100mV nominal VSENSE threshold defining IOUT = 0.1/RS.
Technical Context
The ZXLD1360ET5TA implements a self-oscillating buck converter architecture where internal comparator thresholds (VADJ ±15% hysteresis) regulate switching based on voltage across an external sense resistor (RS). Its current-mode control loop uses a third-order low-pass filter on the ADJ pin to enable stable DC and PWM-based current adjustment without external compensation.
Operation relies on internal reference voltage (VREF = 1.25V, ±50 ppm/°C) and fixed 100mV current-sense threshold (VSENSE) referenced to VIN. The LX switch features 0.5Ω typical RDS(on) and supports up to 625kHz switching, with minimum on/off times of 240ns/200ns ensuring stable operation across input and load variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7V to 30V - supports 12V/24V automotive battery rails with 40V transient tolerance for load dump immunity. |
| Max Output Current | 1A continuous - defined by internal switch rating and thermal limits in TSOT23-5 package. |
| VSENSE Threshold | 100mV ±5mV - sets nominal LED current as IOUT = 0.1/RS; enables ±4% output accuracy over temperature. |
| ADJ Pin Shutdown Voltage | ≤0.2V - forces device into 20µA quiescent state; provides reliable logic-level off control. |
| Switching Frequency | 280kHz typical (at VIN=12V, L=33µH, IOUT=1A) - balances EMI, efficiency, and inductor size. |
| Efficiency | Up to 95% - achieved via low RDS(on) (0.5Ω typ) and synchronous-free architecture minimizing conduction loss. |
| Ambient Temp Range | −40°C to +125°C - validated per AEC-Q100 Grade 1, enabling under-hood and headlamp placement. |
Pinout & Package
Package: TSOT23-5, thermally enhanced with θJA = 82°C/W; RoHS-compliant, green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Drain of integrated NDMOS switch | Connects to inductor and LED anode; handles peak currents up to 1.25A; requires low-inductance layout. |
| GND | Power and signal ground reference | Return path for sense resistor (RS), internal regulator, and comparator; must be low-impedance star point. |
| ADJ | Multi-function control pin | Accepts DC voltage (0.3–2.5V) or PWM signal to adjust LED current; <0.2V disables output; capacitor to GND adds soft-start delay. |
| ISENSE | High-side current sense input | Connected to RS resistor; measures voltage drop relative to VIN to set IOUT; referenced to internal 100mV threshold. |
| VIN | Main power input | 7–30V supply; requires ≥4.7µF X7R ceramic decoupling capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Single-pin brightness & on/off control | ADJ pin accepts DC or PWM signals - eliminates separate enable/brightness lines and reduces MCU GPIO count. |
| 100:1 PWM dimming range | Supported at fPWM < 500Hz - enables deep dimming in automotive interior lighting without visible flicker. |
| Thermally optimized package | TSOT23-5 with θJA = 82°C/W - allows 1A operation without heatsink in compact PCB layouts. |
| Integrated current sense reference | Fixed 100mV VSENSE threshold - removes need for external op-amp or reference, reducing BOM and layout complexity. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient - ensures reliability in automotive front-end modules and headlamp drivers. |
Applications
| Automotive Exterior Lighting | Commercial LED Signage |
|---|---|
|
Use Scenario: Driving 3–8 series-connected white LEDs in tail lamps, brake lights, or DRLs powered from 12V/24V vehicle battery. IC Role / Device Role / Timing Role: Constant-current buck controller regulating LED string current with AEC-Q100 compliance and load-dump robustness. Use Value: Enables single-chip solution with no external current-sense amplifier, supporting PWM dimming down to 1% duty cycle for adaptive lighting modes. |
Use Scenario: Powering high-brightness RGB LED modules in outdoor digital billboards and architectural façade lighting. IC Role / Device Role / Timing Role: High-efficiency LED current source with wide input range accommodating variable AC-DC adapter outputs (12–30V). Use Value: Delivers 95% efficiency and ±4% current accuracy across temperature, reducing thermal derating and improving luminance consistency. |
| Industrial Status Indicators | Truck & Bus Lighting |
|
Use Scenario: Driving single or dual high-intensity LEDs on control panels, HMIs, and safety-rated equipment requiring long-life illumination. IC Role / Device Role / Timing Role: Robust LED driver with shutdown capability and wide operating temperature range for factory-floor environments. Use Value: 20µA standby current and 0.2V logic-compatible shutdown enable low-power sleep modes without external circuitry. |
Use Scenario: Replacing incandescent bulbs in heavy-duty vehicle marker lights, side repeaters, and clearance lamps. IC Role / Device Role / Timing Role: Automotive-grade constant-current source qualified to withstand harsh vibration, wide voltage transients, and extended temperature cycling. Use Value: 40V transient capability and AEC-Q100 Grade 1 certification ensure compliance with SAE J1455 and ISO 16750-2 requirements. |
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 | Higher max input (40V), but requires external MOSFET and sense resistor; no integrated switch. | Used where higher power (>1.5A) or multi-string control is needed; lacks AEC-Q100 qualification. | Select when system-level flexibility outweighs integration benefits and automotive qualification is not required. |
| LM3409QMY/NOPB | Adjustable frequency (200–2000kHz), but requires external compensation network and gate driver; no ADJ pin dimming. | Preferred for high-frequency, low-EMI designs with complex feedback tuning; not pin-compatible. | Choose for designs needing >1MHz switching or precise loop control - not for drop-in replacement. |
Compared with AL8862SP-13 and LM3409QMY/NOPB, the ZXLD1360ET5TA offers superior integration (integrated switch, reference, and dimming interface) and automotive qualification, while trading off programmability and maximum power handling for simplicity and reliability in 1A-class applications.
Availability
ZXLD1360ET5TA is available at Aetrix Electronics and suitable for automotive lighting, commercial signage, and industrial HMI applications requiring stable component supply, AEC-Q100 compliance, and TSOT23-5 thermal performance.
Supply support for ZXLD1360ET5TA 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
The ZXLD1360 belongs to Diodes' automotive-qualified LED driver product line, designed specifically for cost-sensitive, thermally constrained constant-current LED applications in vehicles and ruggedized equipment.
FAQ
What is the minimum sense resistor value for 1A output?
The minimum RS value is 0.1Ω, yielding IOUTnom = 0.1/0.1 = 1A when the ADJ pin is floating at VREF = 1.25V. Using lower RS risks exceeding the 1.25A switch current limit and violating absolute maximum ratings; RS < 0.1Ω is prohibited even with ADJ pin control.
Can the ZXLD1360ET5TA drive multiple parallel LED strings?
No - the ZXLD1360ET5TA is designed for single-string, series-connected LEDs only. Its high-side current sensing and buck topology require uniform current through one path; parallel strings would cause mismatched current distribution and thermal instability without individual per-string regulation.
How does soft-start work, and how can it be extended?
Soft-start arises from the internal third-order low-pass filter on the ADJ pin, providing ~500µs delay to reach 90% of final output current. Adding an external capacitor (e.g., 1nF) from ADJ to GND increases soft-start time by ~500µs/nF, preventing inrush current in sensitive LED arrays or shared input rails.
Is the ADJ pin compatible with standard microcontroller GPIO outputs?
Yes, but only with open-drain/open-collector configuration. Direct push-pull GPIO may inject negative spikes due to ADJ pin capacitance; Diodes recommends adding a 10kΩ series resistor and Schottky clamp diode (cathode to ADJ, anode to GND) when interfacing with MCU outputs to prevent erratic switching behavior.
ZXLD1360ET5TA 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):
- 7V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- 30V
- 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-23-5
ZXLD1360ET5TA FAQ
1.How can I place an order for ZXLD1360ET5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXLD1360ET5TA 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 ZXLD1360ET5TA reliable?
The price and inventory of ZXLD1360ET5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXLD1360ET5TA is usually 5 days.
3.What payment methods are accepted for ZXLD1360ET5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXLD1360ET5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXLD1360ET5TA?
ZXLD1360ET5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXLD1360ET5TA 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 ZXLD1360ET5TA?
For technical support, including ZXLD1360ET5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXLD1360ET5TA requirements.
6.How does Aetrix verify that ZXLD1360ET5TA is sourced from the original manufacturer or authorized distributors?
All ZXLD1360ET5TA 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 ZXLD1360ET5TA meets industry standards.
7.What is the process for return or replacement of ZXLD1360ET5TA?
All ZXLD1360ET5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXLD1360ET5TA, 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 ZXLD1360ET5TA part is unused and in its original packaging.
Return procedure for ZXLD1360ET5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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