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Diodes Incorporated ZLDO1117QG50TA
- Part No.:
- ZLDO1117QG50TA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZLDO1117QG50TA.pdf
- Description:
- LDO BJT HICURR SOT223 T&R 1K
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
ZLDO1117QG50TA from Diodes Incorporated is an automotive-grade, fixed-output 5.0V low-dropout linear regulator delivering 1A output current with ±2% output voltage tolerance over –40°C to +105°C ambient, 1.2V max dropout at full load, and AEC-Q100 Grade 2 qualification-designed for stable 5V supply in engine control units, ADAS camera modules, and automotive infotainment power rails.
For engineers reviewing the ZLDO1117QG50TA datasheet, ZLDO1117QG50TA pinout, ZLDO1117QG50TA application, or ZLDO1117QG50TA equivalent, key selection criteria include dropout voltage at 1A, thermal performance in SOT223, MLCC compatibility, ripple rejection at 120Hz, and AEC-Q100 PPAP support for automotive BOMs.
Technical Context
The ZLDO1117QG50TA implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling fast transient response and stable regulation with 4.7µF MLCC output capacitors (ESR ≤ 0.5Ω). Its internal 1.25V reference and fixed resistor network set VOUT = 5.000V with ±2% accuracy across line, load, and temperature.
Thermal shutdown activates at TJ ≥ +150°C, and current limiting protects against short-circuit faults. The device operates with VIN as low as 6.4V (VIN ≥ VOUT + 1.4V) and supports input voltages up to 18V, maintaining regulation under automotive load-dump and cold-crank conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±2% (guaranteed over –40°C to +105°C ambient, 10mA–1A load) |
| Max Dropout Voltage | 1.2V at 1A load (enables operation with VIN as low as 6.4V for 5V output) |
| Output Current | 1A continuous (with thermal derating per θJA = 107°C/W in SOT223) |
| Ripple Rejection | 80dB at 120Hz (with 25µF tantalum output cap; enables clean 5V rail from noisy 12V battery) |
| Quiescent Current | 4–10mA (low no-load consumption critical for always-on automotive modules) |
| Operating Temp Range | –40°C to +105°C ambient (AEC-Q100 Grade 2 qualified; supports under-hood placement) |
| ESR Requirement | 0.05Ω ≤ ESR ≤ 0.5Ω for 4.7µF output capacitor (enables use of compact, reliable X7R MLCCs) |
Pinout & Package
SOT223 package (3-lead, surface-mount) with exposed tab electrically connected to VOUT for enhanced thermal conduction. Tab must be soldered to ≥5.6mm × 5.6mm 2oz copper pad for rated θJA = 107°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ADJ/GND | Reference node / ground return | Fixed 5V version: internally tied to GND; provides feedback reference point for internal divider |
| 2: VOUT | Regulated output | Must connect ≥4.7µF MLCC (X7R) with ESR ≤ 0.5Ω; tab is electrically connected to this pin |
| 3: VIN | Unregulated input | Requires ≥1.4V headroom above VOUT; connect bulk capacitor (≥10µF) close to pin for transient stability |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 2 certified, PPAP-capable, manufactured in IATF 16949 facilities |
| MLCC-compatible stability | Stable with 4.7µF X7R ceramic capacitors (no tantalum required), reducing board area and cost |
| Fast transient response | ≤10mV undershoot/overshoot on 100mA→500mA load step (with 4.7µF MLCC output cap) |
| Integrated protection | Thermal shutdown (150°C) and current limiting prevent damage during fault conditions |
| Low-noise regulation | 80dB ripple rejection at 120Hz enables clean 5V supply for analog sensors and MCU cores |
Applications
| Engine Control Unit (ECU) Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Provides regulated 5V rail for microcontroller, CAN transceiver, and sensor interface circuitry in gasoline/diesel ECUs exposed to –40°C to +105°C ambient. IC Role / Device Role / Timing Role: Primary 5V LDO regulator supplying core logic and communication peripherals. Use Value: AEC-Q100 qualification ensures reliability under thermal cycling and vibration; 1.2V dropout allows operation during cold-crank (6.5V battery). |
Use Scenario: Powers image signal processor (ISP) and serializer in 77GHz radar or surround-view camera modules mounted near vehicle exterior. IC Role / Device Role / Timing Role: Local 5V point-of-load regulator decoupling high-speed digital imaging circuits from noisy 12V chassis supply. Use Value: 80dB ripple rejection suppresses switching noise from DC/DC converters; MLCC compatibility enables compact, high-reliability layout. |
| Infotainment Head Unit Core Logic | Body Control Module (BCM) Interface |
|
Use Scenario: Supplies 5V to USB host controllers, audio codecs, and display timing ICs in automotive infotainment systems requiring low standby current. IC Role / Device Role / Timing Role: Always-on 5V regulator supporting wake-on-CAN functionality and fast system boot. Use Value: 4–10mA quiescent current minimizes battery drain during vehicle sleep mode; –40°C start-up capability ensures winter reliability. |
Use Scenario: Delivers 5V to LIN transceivers, door lock actuators, and interior lighting drivers in distributed BCM nodes. IC Role / Device Role / Timing Role: Robust local regulator tolerant of load dump (ISO 7637-2 Pulse 5a) and reverse-battery transients. Use Value: 18V absolute max input rating withstands 24V load dump events; thermal shutdown prevents latch-up during sustained short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5V automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | 300mA output, 225mV dropout at 300mA, SOT-23 package, no AEC-Q100 qualification | Limited to low-power sub-systems (e.g., sensor nodes); unsuitable for 1A loads or PPAP-driven programs | Select only for space-constrained non-safety-critical modules where 1A current and automotive certification are not required |
| NCP1117ST50T3G | 1A output, 1.2V dropout, commercial-grade (–40°C to +125°C junction), no AEC-Q100 or PPAP support | Acceptable for industrial or consumer designs; lacks automotive change control, traceability, and IATF 16949 manufacturing | Use only in non-automotive applications or early prototyping where AEC-Q100 compliance is deferred |
Compared with TLV73350PDBVR and NCP1117ST50T3G, the ZLDO1117QG50TA uniquely delivers 1A automotive-grade regulation with PPAP-ready documentation, MLCC stability, and guaranteed 1.2V dropout-making it the only option qualified for production ECU, ADAS, and BCM power rails.
Availability
ZLDO1117QG50TA is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for ZLDO1117QG50TA 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 computing markets.
The ZLDO1117Q series belongs to Diodes' automotive-qualified linear regulator product line, engineered specifically for AEC-Q100-compliant power management in harsh-temperature vehicle subsystems.
FAQ
Is ZLDO1117QG50TA pin-compatible with standard LM1117-5.0 regulators?
Yes, ZLDO1117QG50TA uses the same SOT223 pinout (ADJ/GND–VOUT–VIN) and footprint as industry-standard 1117 regulators. However, it adds automotive qualification, tighter 2% tolerance, and guaranteed MLCC stability-requiring no PCB redesign for drop-in replacement in qualified designs.
What is the minimum input voltage required for regulation at 5V output?
The ZLDO1117QG50TA requires VIN ≥ 6.4V to maintain regulation at full 1A load (VOUT + 1.4V headroom). At lighter loads, it regulates down to VIN = 6.0V, but datasheet guarantees specify 6.4V as the minimum for 1A operation with ≤1% output deviation.
Can I use a 2.2µF MLCC instead of the recommended 4.7µF output capacitor?
No-2.2µF violates the 4.7µF minimum requirement and risks instability, especially under load transients. The 4.7µF value ensures phase margin >45° with ESR ≤ 0.5Ω; using smaller capacitance may cause oscillation or excessive output voltage overshoot during 100mA→500mA steps.
Does ZLDO1117QG50TA require an input capacitor?
An input capacitor is not strictly required for stability but is strongly recommended: a 1µF ceramic capacitor placed within 5mm of the VIN pin suppresses high-frequency noise and prevents input voltage sag during load transients, especially when the regulator is remote from the main 12V filter capacitor.
ZLDO1117QG50TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
ZLDO1117QG50TA FAQ
1.How can I place an order for ZLDO1117QG50TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLDO1117QG50TA 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 ZLDO1117QG50TA reliable?
The price and inventory of ZLDO1117QG50TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLDO1117QG50TA is usually 5 days.
3.What payment methods are accepted for ZLDO1117QG50TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZLDO1117QG50TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZLDO1117QG50TA?
ZLDO1117QG50TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZLDO1117QG50TA 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 ZLDO1117QG50TA?
For technical support, including ZLDO1117QG50TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLDO1117QG50TA requirements.
6.How does Aetrix verify that ZLDO1117QG50TA is sourced from the original manufacturer or authorized distributors?
All ZLDO1117QG50TA 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 ZLDO1117QG50TA meets industry standards.
7.What is the process for return or replacement of ZLDO1117QG50TA?
All ZLDO1117QG50TA units undergo pre-shipment inspection (PSI). If there is an issue with ZLDO1117QG50TA, 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 ZLDO1117QG50TA part is unused and in its original packaging.
Return procedure for ZLDO1117QG50TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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