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Diodes Incorporated ZLDO1117QGTA
- Part No.:
- ZLDO1117QGTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZLDO1117QGTA.pdf
- Description:
- LDO BJT HICURR SOT223 T&R 1K
- Quantity:
- Payment:
- Shipping:
Inventory:967
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Product details
Overview
ZLDO1117QGTA from Diodes Incorporated is an automotive-grade, low-dropout linear regulator delivering 1A output current with fixed or adjustable output voltage (1.2V–5.0V), 2% output tolerance over -40°C to +105°C ambient, ≤1.2V dropout at full load, and AEC-Q100 Grade 2 qualification-designed for high-speed bus termination and 3.3V logic supply in engine control units and ADAS domain controllers.
For engineers reviewing the ZLDO1117QGTA datasheet, ZLDO1117QGTA pinout, ZLDO1117QGTA application, or ZLDO1117QGTA equivalent, key selection criteria include dropout voltage at 1A, thermal resistance in SOT223, MLCC-compatible stability, automotive PPAP readiness, and adjust-pin current impact on precision feedback networks.
Technical Context
The ZLDO1117QGTA uses a bandgap-referenced error amplifier with internal 1.25V reference to regulate output via external resistor divider (adjustable) or integrated resistors (fixed variants). It implements foldback current limiting and thermal shutdown triggered at +150°C junction temperature.
Its compensation architecture supports stable operation with 4.7µF MLCCs (ESR ≤ 0.5Ω), eliminating need for high-ESR tantalum capacitors. Ripple rejection reaches 80dB at 120Hz with proper bypassing, and line/load regulation remains ≤0.2% across industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous-supports power rails for microcontrollers, CAN transceivers, and sensor interfaces without derating at +105°C ambient. |
| Dropout Voltage | 1.2V max at 1A-enables 3.3V output from 4.5V input, critical for post-buck LDO stages in 12V automotive systems. |
| Output Tolerance | ±2% over temperature, line, and load-guarantees voltage accuracy for 3.3V I/O and 1.8V core supplies without calibration. |
| Operating Temp | -40°C to +105°C ambient-meets AEC-Q100 Grade 2 requirements for under-hood and cabin ECUs. |
| Quiescent Current | 4–10mA-minimizes standby power loss in always-on vehicle networks like LIN or CAN FD wake-up circuits. |
| Ripple Rejection | 80dB at 120Hz-suppresses alternator ripple and switching noise from upstream DC/DC converters. |
| Thermal Resistance | θJA = 107°C/W (SOT223)-requires ≥5.6mm × 5.6mm 2oz copper pad for 1W dissipation at +105°C ambient. |
Pinout & Package
SOT223 package with exposed tab connected to VOUT for enhanced thermal conduction; compact surface-mount footprint (6.5mm × 3.5mm) suitable for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ADJ/GND | Feedback reference node | Ground for fixed-output variants; sets VOUT via R1/R2 divider in adjustable mode-input bias current ≤120µA affects high-resistor-divider accuracy. |
| 2: VOUT | Regulated output | Must connect ≥4.7µF MLCC (X7R, ESR ≤ 0.5Ω); tab is electrically tied to this pin for thermal and electrical return path. |
| 3: VIN | Unregulated input | Requires ≥1.3V headroom above VOUT; input capacitor recommended if >5cm from bulk filter to limit transient sag during load steps. |
Key Features
| Feature | Design Value |
|---|---|
| MLCC-compatible stability | Stable with 4.7µF X7R ceramic (ESR ≤ 0.5Ω)-eliminates need for bulky, aging-prone tantalum capacitors in long-life automotive designs. |
| Fast transient response | ≤10mV undershoot/overshoot for 100mA→500mA load steps-maintains clean supply during CAN frame bursts or ADC sampling events. |
| Automotive qualification | AEC-Q100 Grade 2, PPAP-capable, IATF16949 manufacturing-enables direct use in ASIL-B subsystems without additional qualification effort. |
| Low-noise regulation | 60–80dB ripple rejection up to 10kHz-preserves signal integrity in analog front-ends for radar or camera sensors. |
| Thermal protection | Auto-recovering shutdown at +150°C junction-prevents permanent damage during sustained overload or poor heatsinking in sealed enclosures. |
Applications
| Engine Control Unit (ECU) Power Rail | ADAS Camera Sensor Supply |
|---|---|
Use Scenario: Provides 3.3V supply to MCU, CAN controller, and EEPROM in gasoline/diesel engine management modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Primary post-regulator converting 5V intermediate rail to noise-immune 3.3V for digital logic and communication peripherals. Use Value: ±2% tolerance and 80dB ripple rejection ensure reliable CAN FD frame transmission and flash programming across -40°C to +105°C. | Use Scenario: Powers image signal processor (ISP) and high-speed serializer in 8MP surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise 1.8V core regulator for ISP digital blocks, decoupled from noisy 12V input via 1.2V dropout margin. Use Value: Fast transient response prevents pixel corruption during auto-exposure adjustments; MLCC compatibility reduces board area by 60% vs. tantalum solutions. |
| Infotainment System Audio Codec | Body Control Module (BCM) I/O Interface |
Use Scenario: Supplies clean 5.0V to audio DAC and headphone amplifier in head-unit systems with shared 12V battery input. IC Role / Device Role / Timing Role: Final-stage LDO filtering switching noise from buck converter powering display and CPU subsystems. Use Value: 80dB ripple rejection at 120Hz eliminates audible alternator whine; thermal shutdown protects against sustained short-circuit faults. | Use Scenario: Generates 5.0V for LIN transceivers and 3.3V for microcontroller I/O in door module and seat control units. IC Role / Device Role / Timing Role: Dual-output support via fixed 5.0V and adjustable 3.3V variants enables single-BOM flexibility across multiple BCM variants. Use Value: AEC-Q100 qualification and PPAP documentation reduce Tier-1 validation time; SOT223 footprint allows automated optical inspection (AOI) compatibility. |
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 |
|---|---|---|---|
| TLV1117LV33QDCKRQ1 | 3.3V fixed, 800mA max, 1.1V dropout at 800mA, θJA = 218°C/W (SOT-23) | Limited to lower current and higher thermal resistance-unsuitable for 1A continuous loads in confined spaces. | Select only for space-constrained, sub-500mA applications where SOT-23 footprint is mandatory. |
| NCP1117ST33T3G | 3.3V fixed, 1A, 1.2V dropout, but commercial-grade (−40°C to +125°C junction, no AEC-Q100) | Lacks PPAP support and automotive qualification-requires full requalification for automotive production. | Acceptable for prototyping or non-safety-critical aftermarket modules; not for OEM programs. |
Compared with TLV1117LV33QDCKRQ1 and NCP1117ST33T3G, the ZLDO1117QGTA uniquely delivers 1A automotive-grade regulation in SOT223 with verified MLCC stability and documented PPAP readiness-reducing qualification risk and thermal design margin in production ECUs.
Availability
ZLDO1117QGTA is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, infotainment audio subsystems, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for ZLDO1117QGTA 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 components for automotive, industrial, and consumer markets, with ISO/TS 16949-certified facilities.
The ZLDO1117Q series belongs to Diodes' automotive-qualified linear regulator product line, engineered specifically for robust, low-noise power delivery in AEC-Q100-compliant electronic control units operating across extended temperature ranges.
FAQ
What is the minimum input-to-output voltage differential required for regulation?
The ZLDO1117QGTA requires VIN ≥ VOUT + 1.3V for proper regulation under all conditions. At 1A load, dropout is guaranteed ≤1.2V, but a 1.5V headroom is recommended to maintain ±2% output accuracy across temperature and line variations per datasheet Note 5.
Can the ZLDO1117QGTA be used with ceramic capacitors smaller than 4.7µF?
No-datasheet Section 7 specifies a minimum 4.7µF MLCC (X7R, ESR ≤ 0.5Ω) for stability. Using smaller values risks oscillation due to insufficient phase margin; 10µF is recommended for improved transient response in ADAS or infotainment applications.
How does the adjust pin current affect output voltage accuracy in adjustable configurations?
Adjust pin current (max 120µA) flows through the lower feedback resistor R2, creating an offset error. For example, with R2 = 1kΩ, this adds 120mV error-requiring R2 ≤ 200Ω or active compensation in precision 1.8V/2.5V designs per Figure 2 analysis in DS37075 Rev. 3-2.
Is thermal pad connection to PCB ground required for the SOT223 package?
No-the SOT223 tab is internally connected to VOUT, not GND. It must be soldered to a dedicated VOUT copper pour (≥5.6mm × 5.6mm, 2oz) for thermal conduction; connecting to ground creates a short circuit and violates safe operating area limits per SOA curve on page 3.
ZLDO1117QGTA 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:
- 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):
- 5 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
ZLDO1117QGTA FAQ
1.How can I place an order for ZLDO1117QGTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLDO1117QGTA 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 ZLDO1117QGTA reliable?
The price and inventory of ZLDO1117QGTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLDO1117QGTA is usually 5 days.
3.What payment methods are accepted for ZLDO1117QGTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZLDO1117QGTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZLDO1117QGTA?
ZLDO1117QGTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZLDO1117QGTA 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 ZLDO1117QGTA?
For technical support, including ZLDO1117QGTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLDO1117QGTA requirements.
6.How does Aetrix verify that ZLDO1117QGTA is sourced from the original manufacturer or authorized distributors?
All ZLDO1117QGTA 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 ZLDO1117QGTA meets industry standards.
7.What is the process for return or replacement of ZLDO1117QGTA?
All ZLDO1117QGTA units undergo pre-shipment inspection (PSI). If there is an issue with ZLDO1117QGTA, 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 ZLDO1117QGTA part is unused and in its original packaging.
Return procedure for ZLDO1117QGTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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