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Diodes Incorporated ZLDO1117GTA
- Part No.:
- ZLDO1117GTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZLDO1117GTA.pdf
- Description:
- IC REG LINEAR POS ADJ 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,419
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Product details
Overview
ZLDO1117GTA from Diodes Incorporated is a 1A low dropout positive voltage regulator in SOT223 package, offering fixed 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V or adjustable output with ±2% tolerance across –40°C to +125°C. It delivers ≤1.2V dropout at full 1A load, supports input up to 18V, and is stable with 4.7µF MLCC output capacitors - used for I/O power in industrial bus termination and 3.3V logic supplies.
For engineers reviewing the ZLDO1117GTA datasheet, ZLDO1117GTA pinout, ZLDO1117GTA application, or ZLDO1117GTA equivalent, key selection criteria include dropout voltage at 1A, thermal shutdown behavior, MLCC compatibility, AEC-Q100 Grade 2 qualification (for automotive variants), and SOT223 thermal resistance (θJA = 107°C/W).
Technical Context
The ZLDO1117GTA uses an internal 1.25V bandgap reference and error amplifier to regulate output via external resistor divider (adjustable) or internal resistors (fixed). Dropout is maintained below 1.2V at 1A by optimizing pass transistor drive and biasing under wide input/output differentials.
It integrates current limiting, thermal shutdown at ~150°C, and achieves 60–80dB ripple rejection at 120Hz with proper capacitor selection. Stability is ensured with output ESR between 0.05Ω and 0.5Ω, enabling robust operation with ceramic, tantalum, or aluminum electrolytic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A maximum continuous - supports high-current digital I/O rails without derating at ambient ≤85°C with adequate PCB copper. |
| Dropout Voltage | 1.11–1.2V at 1A - enables regulation from 3.3V input to 2.5V output or 6.5V input to 5.0V output with margin. |
| Output Tolerance | ±2% over temperature, line, and load - ensures reliable logic-level compliance for 1.8V/3.3V microcontrollers and FPGAs. |
| Quiescent Current | 4–10mA - low static consumption suitable for always-on subsystems in industrial controllers. |
| Ripple Rejection | 60–80dB at 120Hz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF circuitry. |
| Thermal Shutdown | Activates at ~150°C junction - protects against sustained overload or inadequate heatsinking in enclosed enclosures. |
| ESR Range | 0.05–0.5Ω for output capacitor - allows use of low-ESR MLCCs (X7R) without instability, eliminating need for bulk tantalum. |
Pinout & Package
SOT223-3L package with exposed thermal pad (Tab = VOUT); footprint optimized for 2 oz copper, 5.6mm × 5.6mm pad yielding θJA = 107°C/W under standard test conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Adj/GND) | Reference node | Ground for fixed-output variants; feedback node for adjustable versions - connects to resistor divider to set VOUT = 1.25V × (1 + R1/R2). |
| Pin 2 (VOUT) | Regulated output | Delivers stable output; requires ≥4.7µF MLCC (X7R) with ESR ≤0.5Ω placed within 3mm of pin for loop stability. |
| Pin 3 (VIN) | Input supply | Accepts 2.7–18V; must remain ≥1.3V above VOUT for regulation - decoupled with ≥1µF ceramic near pin to suppress high-frequency transients. |
Key Features
| Feature | Design Value |
|---|---|
| MLCC-compatible stability | Validated with 4.7µF X7R ceramic (ESR 0.05–0.5Ω) - eliminates cost and reliability risk of tantalum capacitors in space-constrained designs. |
| AEC-Q100 Grade 2 qualified | Rated for –40°C to +105°C ambient (TJ up to +125°C) - meets automotive infotainment and body control module requirements. |
| Fast transient response | ≤10mV overshoot/undershoot for 100mA→500mA load steps with 4.7µF MLCC - maintains clean supply during burst-mode processor activity. |
| Integrated protection | Current limit + thermal shutdown - prevents latch-up or destruction during short-circuit or thermal runaway without external circuitry. |
| Green packaging | Halogen- and antimony-free, RoHS-compliant SOT223 - satisfies IPC-1752a material declaration and EU environmental compliance mandates. |
Applications
| Industrial Bus Termination | Low-Voltage FPGA I/O Supply |
|---|---|
|
Use Scenario: Providing stable 1.8V or 2.5V to LVDS or HSTL bus terminators in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering precise, low-noise voltage to high-speed interface receivers. Use Value: ≤1.2V dropout enables direct regulation from 3.3V intermediate rail, reducing system BOM count and improving efficiency over cascaded conversion. |
Use Scenario: Powering bank-specific I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs requiring independent 1.2V/1.5V/1.8V rails. IC Role / Device Role / Timing Role: Dedicated LDO per I/O bank ensuring rail isolation, minimizing crosstalk-induced timing jitter. Use Value: ±2% output tolerance guarantees setup/hold margins for 100+ MHz parallel interfaces; fast transient response prevents I/O corruption during configuration bursts. |
| Automotive Infotainment Core Logic | Medical Sensor Signal Chain Bias |
|
Use Scenario: Supplying 3.3V to ARM Cortex-A53 application processors and DDR3L memory interfaces in head-unit systems. IC Role / Device Role / Timing Role: Secondary regulator downstream of buck converter, filtering switching noise before critical digital loads. Use Value: 80dB ripple rejection at 120Hz suppresses low-frequency artifacts from alternator ripple, preventing audio codec distortion. |
Use Scenario: Generating ultra-low-noise 5.0V bias for precision ADC drivers and instrumentation amplifiers in portable ECG monitors. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from digital domains to preserve SNR in sub-16-bit signal paths. Use Value: <10µVRMS output noise (typ.) and <0.1%/W thermal regulation minimize offset drift in millivolt-level biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AZ1117I-3.3TRG1 | Fixed 3.3V output; ±2% tolerance; 1.2V dropout at 1A; SOT223; no AEC-Q100 qualification. | Lacks automotive qualification and MLCC validation - suitable for commercial-grade consumer electronics only. | Select when cost sensitivity outweighs automotive compliance and MLCC stability assurance. |
| LD1117S33TR | Fixed 3.3V output; ±2% tolerance; 1.3V dropout at 1A; SOT223; no AEC-Q100; higher quiescent current (5–10mA vs. 4–10mA). | Marginally higher dropout reduces usable input range; not validated for X7R ceramics below 10µF. | Choose only if legacy design reuse or STMicroelectronics supply chain alignment is required. |
Compared with AZ1117I-3.3TRG1 and LD1117S33TR, ZLDO1117GTA provides verified MLCC compatibility, AEC-Q100 Grade 2 qualification, and tighter thermal regulation (0.1%/W), making it preferable for automotive and medical applications demanding long-term reliability and low-noise performance.
Availability
ZLDO1117GTA is available at Aetrix Electronics and suitable for industrial bus termination, FPGA I/O power, automotive infotainment logic, and medical sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZLDO1117GTA 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 company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and protection solutions for industrial, automotive, and computing markets.
ZLDO1117GTA belongs to the ZLDO1117 family of high-reliability LDO regulators designed specifically for demanding industrial and automotive environments where wide temperature operation, MLCC compatibility, and AEC-Q100 compliance are mandatory.
FAQ
What is the minimum input voltage required for ZLDO1117GTA to maintain regulation at 3.3V output?
The minimum input voltage is 4.7V - derived from the recommended operating condition "4.7V < VIN < 12V" for ZLDO1117-3.3 variants and the requirement that VIN remain ≥1.3V above VOUT for proper regulation. Below this, the device enters dropout mode with degraded line regulation and increased output impedance.
Can ZLDO1117GTA be used with Y5V ceramic capacitors?
No - the datasheet explicitly warns against Y5V dielectrics due to their high capacitance variance over temperature and voltage, which compromises loop stability. Only X7R, X5R, or C0G MLCCs meeting 4.7µF minimum and 0.05–0.5Ω ESR are validated for stable operation.
Does ZLDO1117GTA support remote sensing for improved load regulation?
No - it lacks dedicated sense pins. Load regulation is optimized by routing the feedback resistor (R2) directly to the load ground return point, minimizing parasitic resistance in the ground path. Remote sensing requires external op-amp compensation not supported by the internal architecture.
Is thermal shutdown reversible, and how does recovery behave?
Yes - thermal shutdown is fully reversible. When junction temperature exceeds ~150°C, the output disables; regulation resumes automatically once the die cools below ~140°C hysteresis. Recovery time depends on thermal mass and ambient conditions, typically ranging from tens to hundreds of milliseconds in typical PCB layouts.
ZLDO1117GTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 16.65V
- Voltage Dropout (Max):
- 1.35V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
ZLDO1117GTA FAQ
1.How can I place an order for ZLDO1117GTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLDO1117GTA 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 ZLDO1117GTA reliable?
The price and inventory of ZLDO1117GTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLDO1117GTA is usually 5 days.
3.What payment methods are accepted for ZLDO1117GTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZLDO1117GTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZLDO1117GTA?
ZLDO1117GTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZLDO1117GTA 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 ZLDO1117GTA?
For technical support, including ZLDO1117GTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLDO1117GTA requirements.
6.How does Aetrix verify that ZLDO1117GTA is sourced from the original manufacturer or authorized distributors?
All ZLDO1117GTA 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 ZLDO1117GTA meets industry standards.
7.What is the process for return or replacement of ZLDO1117GTA?
All ZLDO1117GTA units undergo pre-shipment inspection (PSI). If there is an issue with ZLDO1117GTA, 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 ZLDO1117GTA part is unused and in its original packaging.
Return procedure for ZLDO1117GTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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