My Inquiry
My Account
Diodes Incorporated ZLDO1117QG18TA
- Part No.:
- ZLDO1117QG18TA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZLDO1117QG18TA.pdf
- Description:
- LDO BJT HICURR SOT223 T&R 1K
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZLDO1117QG18TA from Diodes Incorporated is an automotive-grade, fixed-output 1.8V low-dropout linear regulator with 1A output current capability, 2% output voltage tolerance over -40°C to +105°C, ≤1.2V dropout at full load, and AEC-Q100 Grade 2 qualification-designed for stable 1.8V core supply in automotive infotainment processors and ADAS sensor modules.
For engineers reviewing the ZLDO1117QG18TA datasheet, ZLDO1117QG18TA pinout, ZLDO1117QG18TA application, or ZLDO1117QG18TA equivalent, key selection criteria include dropout voltage under 1.2V at 1A, MLCC-compatible stability with ≥4.7µF ceramic output capacitance, thermal shutdown behavior at +150°C junction temperature, and automotive-compliant PPAP support.
Technical Context
The ZLDO1117QG18TA implements a quasi-LDO architecture with internal 1.25V reference and feedback network optimized for fixed 1.8V output. It operates across input voltages from 3.2V to 18V and maintains regulation down to 1.5V headroom (VIN ≥ VOUT + 1.5V) under steady-state conditions.
Its fast transient response is enabled by internal compensation compatible with low-ESR MLCCs (0.05–0.5Ω), and it integrates current limiting, thermal shutdown at +150°C, and <10µA quiescent current during light-load operation-critical for always-on automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800V ±2% (1.764–1.836V) across -40°C to +105°C ambient |
| Max Dropout Voltage | 1.2V at 1A load ensures regulation with VIN as low as 3.0V |
| Output Current | 1A continuous; current-limited to prevent damage during short-circuit events |
| Input Voltage Range | 3.2V to 18V-supports 12V automotive battery rail with transient spikes |
| Thermal Shutdown | Activates at +150°C junction temperature; auto-recovery on cooldown |
| Quiescent Current | 4–10mA typical at zero load-minimizes standby power loss |
| Ripple Rejection | 60–80dB at 120Hz with 25µF tantalum output capacitor |
Pinout & Package
SOT223 package with exposed thermal tab connected internally to VOUT for enhanced heat dissipation; footprint compatible with industry-standard 1117 regulators and rated for 107°C/W junction-to-ambient thermal resistance under standard PCB layout (2oz copper, 5.6mm × 5.6mm pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ADJ/GND | Reference node / ground return | Internally tied to GND for fixed-output variants; must be connected to system ground for stability and thermal path integrity |
| 2: VOUT | Regulated output | Delivers 1.8V; requires ≥4.7µF MLCC (X7R) with ESR ≤0.5Ω; tab is electrically connected to this pin |
| 3: VIN | Unregulated input | Accepts up to 18V; must remain ≥1.5V above VOUT to avoid dropout; decoupling capacitor recommended |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 2 qualified, PPAP-capable, manufactured in IATF16949-certified facilities |
| MLCC compatibility | Stable with ≥4.7µF X7R ceramic capacitors (ESR 0.05–0.5Ω), eliminating need for bulkier tantalum |
| Fast transient response | Sub-10mV load-step deviation with 4.7µF MLCC output cap-critical for processor core rail dynamics |
| Low-noise regulation | 60–80dB ripple rejection at 120Hz enables clean supply for analog/RF subsystems |
| Green packaging | Totally lead-free, halogen- and antimony-free per EU RoHS 3 and Diodes' "Green" definition |
Applications
| ADAS Camera Module Power | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers image signal processor (ISP) and MIPI CSI-2 interface in rear-view camera module operating continuously in vehicle cabin. IC Role / Device Role / Timing Role: Fixed 1.8V LDO delivering stable core voltage to ISP logic; handles cold-crank transients via 18V max input rating. Use Value: 2% tolerance and <1.2V dropout ensure reliable operation during battery dips to 9V while maintaining 1.8V ±36mV accuracy. | Use Scenario: Supplies 1.8V core voltage to application processor in automotive head unit with always-on CAN wake-up capability. IC Role / Device Role / Timing Role: Primary core regulator with thermal shutdown and current limit-prevents latch-up during hot-plug or ESD events. Use Value: Quiescent current of 4–10mA minimizes battery drain in sleep mode; MLCC compatibility reduces board area vs. legacy tantalum solutions. |
| Body Control Unit I/O Interface | Telematics GPS/GLONASS RF Front-End |
Use Scenario: Provides regulated 1.8V to LIN transceiver and microcontroller I/O banks in door module control unit. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating digital I/O from noisy 12V battery rail. Use Value: 60–80dB ripple rejection suppresses switching noise from DC-DC converters feeding other subsystems. | Use Scenario: Supplies clean 1.8V bias to GPS/GLONASS LNA and downconverter ICs in telematics control unit. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail requiring minimal VOUT perturbation during RF burst transmission. Use Value: Fast transient response (<10mV deviation) prevents gain compression or phase error in RF front-end during packet bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117-18CDCYR | Commercial-grade (not AEC-Q100); 1.2V dropout at 1A; 1% initial tolerance | Lacks PPAP documentation, thermal grade (-40°C to +125°C), and automotive process controls | Select only for non-automotive industrial designs where qualification overhead is unnecessary |
| NCP1117ST18T3G | AEC-Q100 Grade 3 (−40°C to +125°C junction); 1.15V dropout at 1A; 2% tolerance | Higher junction temp rating but lower thermal robustness in SOT223 (θJA = 120°C/W vs. ZLDO1117Q's 107°C/W) | Prefer when extended junction temperature margin is required, accepting slightly higher board-level thermal design effort |
Compared with TLV1117-18CDCYR and NCP1117ST18T3G, the ZLDO1117QG18TA uniquely balances AEC-Q100 Grade 2 qualification, 107°C/W thermal performance in SOT223, and guaranteed 2% tolerance across full automotive ambient range-making it optimal for cost-sensitive, space-constrained body electronics where PPAP compliance and thermal reliability are mandatory.
Availability
ZLDO1117QG18TA is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core rails, and body control unit I/O interfaces requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for ZLDO1117QG18TA 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 devices for automotive, industrial, and consumer markets-with emphasis on high-reliability, AEC-Q100-qualified power management ICs.
The ZLDO1117Q series belongs to Diodes' automotive LDO portfolio, engineered specifically for demanding vehicle environments requiring PPAP-ready components, extended temperature operation, and robust transient immunity in compact surface-mount packages.
FAQ
What is the minimum input voltage required for ZLDO1117QG18TA to maintain regulation?
The ZLDO1117QG18TA requires VIN ≥ VOUT + 1.5V (i.e., ≥3.3V) to operate outside dropout under steady-state conditions. At 1A load, dropout is guaranteed ≤1.2V, so regulation is maintained down to VIN = 3.0V-but performance specifications like line regulation apply only above 3.3V per datasheet conditions.
Can ZLDO1117QG18TA be used with 2.2µF MLCC output capacitors?
No-ZLDO1117QG18TA requires a minimum 4.7µF MLCC (X7R dielectric) with ESR between 0.05Ω and 0.5Ω for guaranteed stability. Using 2.2µF violates the datasheet's stability condition and risks oscillation or poor transient response, especially under load steps.
Does ZLDO1117QG18TA include reverse-voltage protection?
No-the device lacks integrated reverse-voltage protection. If VIN may fall below GND (e.g., during battery jump-start), an external Schottky diode between VIN and VOUT is recommended to prevent reverse current flow and potential damage to the internal pass transistor.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches +150°C, the ZLDO1117QG18TA disables output and enters thermal shutdown. It remains off until junction temperature drops ~15°C below trip point (~+135°C), then automatically resumes regulation-providing hiccup-mode protection without requiring external reset circuitry.
ZLDO1117QG18TA 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):
- 1.8V
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
ZLDO1117QG18TA FAQ
1.How can I place an order for ZLDO1117QG18TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLDO1117QG18TA 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 ZLDO1117QG18TA reliable?
The price and inventory of ZLDO1117QG18TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLDO1117QG18TA is usually 5 days.
3.What payment methods are accepted for ZLDO1117QG18TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZLDO1117QG18TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZLDO1117QG18TA?
ZLDO1117QG18TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZLDO1117QG18TA 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 ZLDO1117QG18TA?
For technical support, including ZLDO1117QG18TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLDO1117QG18TA requirements.
6.How does Aetrix verify that ZLDO1117QG18TA is sourced from the original manufacturer or authorized distributors?
All ZLDO1117QG18TA 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 ZLDO1117QG18TA meets industry standards.
7.What is the process for return or replacement of ZLDO1117QG18TA?
All ZLDO1117QG18TA units undergo pre-shipment inspection (PSI). If there is an issue with ZLDO1117QG18TA, 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 ZLDO1117QG18TA part is unused and in its original packaging.
Return procedure for ZLDO1117QG18TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZLDO1117QG18TA Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
