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Diodes Incorporated ZLDO1117K15TC
- Part No.:
- ZLDO1117K15TC
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
ZLDO1117K15TC.pdf
- Description:
- IC REG LINEAR 1.5V 1A TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,188
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Product details
Overview
ZLDO1117K15TC from Diodes Incorporated is a fixed-output 1.5V, 1A low-dropout linear regulator in TO252 package, featuring 1.2V max dropout at full load, ±2% output voltage tolerance over industrial temperature range (−40°C to +125°C), and compatibility with MLCC output capacitors. It delivers stable power for 3.3V/1.8V logic supply rails and high-speed bus termination in automotive and industrial control systems.
For engineers reviewing the ZLDO1117K15TC datasheet, ZLDO1117K15TC pinout, ZLDO1117K15TC application, or ZLDO1117K15TC equivalent, key selection criteria include dropout voltage at 1A load, thermal performance in TO252, AEC-Q100 Grade 2 qualification, and stability with low-ESR ceramic capacitors - all critical for embedded power integrity in thermally constrained environments.
Technical Context
The ZLDO1117K15TC uses an internal bandgap reference (1.25V) and error amplifier to regulate output with fast transient response and built-in thermal shutdown. Its quiescent current is 4–10mA, and ground current remains below 120µA under light load, enabling efficient operation across wide input ranges (2.7V to 18V).
Designed for low-noise, high-stability applications, it achieves 60–80dB ripple rejection at 120Hz and supports output capacitance as low as 4.7µF X7R MLCC (ESR ≤ 0.5Ω). The device operates within −40°C to +125°C junction temperature, with thermal shutdown activating at ~150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.500V ±2% (1.470V–1.530V) across 0–1A load and −40°C to +125°C - ensures logic-level compliance for 1.5V I/O interfaces. |
| Dropout Voltage | 1.11–1.2V at 1A load (ΔVOUT = 1% of VOUT) - enables regulation from 2.7V input, supporting wide-input industrial supplies. |
| Load Regulation | ≤6mV over 0–1A load (VIN = 3.0V) - maintains tight voltage accuracy during dynamic current steps in microcontroller I/O domains. |
| Ripple Rejection | 60–80dB at 120Hz with 25µF tantalum output cap - suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF subsystems. |
| Thermal Shutdown | Activates at ~150°C junction temperature - protects against sustained overload or poor PCB heatsinking without external circuitry. |
| Package Thermal Resistance | θJA = 73°C/W (TO252 on 2″×2″ 1oz Cu PCB) - defines maximum power dissipation (≈1.37W at ΔT = 100°C) for continuous 1A operation. |
| Capacitor Compatibility | Stable with 4.7µF X7R MLCC (ESR ≤ 0.5Ω) - eliminates need for bulk electrolytic caps, reducing board area and improving reliability. |
Pinout & Package
Package: TO252-3L (DPAK), surface-mount, thermally enhanced with exposed tab connected to VOUT for improved heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj/GND) | Reference node / Ground return | Ground terminal for fixed-output variant; must be connected directly to system GND to ensure accurate regulation and minimize ground bounce. |
| 2 (VOUT) | Regulated output | Delivers 1.5V to load; requires ≥4.7µF MLCC (X7R) with ESR ≤ 0.5Ω placed <2mm from pin for loop stability and transient response. |
| 3 (VIN) | Input supply | Accepts 2.7–18V input; must remain ≥1.3V above VOUT to avoid dropout; benefits from local 1µF ceramic bypass near pin. |
| Tab | Output connection / Thermal path | Internally tied to VOUT; soldered to large copper pour for thermal management - critical for sustaining 1A continuous current. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.2V max dropout enables 1.5V output from 2.7V input - ideal for battery-backed or multi-rail systems where headroom is limited. |
| AEC-Q100 Grade 2 qualified | Rated for −40°C to +105°C ambient (junction up to +125°C) - meets automotive infotainment and body electronics reliability requirements. |
| MLCC-compatible stability | Guaranteed stable with 4.7µF X7R ceramic (not Y5V) - reduces BOM count, improves MTBF, and eliminates electrolytic aging concerns. |
| Fast transient response | Sub-10µs recovery from 100mA→500mA load step (with 4.7µF MLCC) - prevents brownout in FPGA I/O banks or sensor interface circuits. |
| Built-in protection | Current limiting (~1.1A) + thermal shutdown - eliminates need for external foldback or reset circuitry in space-constrained designs. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Providing clean 1.5V supply to HDMI transmitter PHY and MIPI D-PHY receivers in head-unit display systems. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.5V to high-speed digital interfaces requiring low noise and fast load transient immunity. Use Value: 80dB ripple rejection suppresses DC/DC switching noise, preventing bit errors; TO252 thermal performance sustains 1A peak current during video burst transmission. |
Use Scenario: Powering isolated 1.5V logic for RS-485 transceivers and GPIO expanders in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring stable voltage during hot-swap insertion and ESD events. Use Value: ±2% tolerance and −40°C to +125°C operation guarantee timing margin for UART and SPI peripherals; MLCC compatibility avoids capacitor derating at temperature extremes. |
| Medical Sensor Hub | Smart Meter Communication IC |
|
Use Scenario: Supplying 1.5V to ultra-low-power ADC front-ends and BLE SoC sleep-mode regulators in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-quiescent, precision LDO maintaining reference stability during microamp-level sleep cycles and milliamp active bursts. Use Value: 4–10mA IQ enables >1-year battery life in pulse-activated sensors; thermal shutdown prevents fault propagation during probe short-circuit events. |
Use Scenario: Regulating 1.5V for NB-IoT modem baseband processors and secure element ICs in utility smart meters deployed outdoors. IC Role / Device Role / Timing Role: AEC-Q100-compliant LDO ensuring long-term reliability under thermal cycling and humidity stress. Use Value: Halogen-free "Green" packaging and RoHS compliance meet global utility procurement mandates; 73°C/W θJA allows compact heatsinkless layout in sealed meter enclosures. |
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 |
|---|---|---|---|
| AP1117K15G-13 | Same 1.5V/1A rating but ±2.5% tolerance and higher 1.3V dropout; no AEC-Q100 qualification. | Lacks automotive qualification and has looser output accuracy - suitable only for non-automotive industrial use. | Select if cost sensitivity outweighs automotive compliance and tighter regulation needs. |
| TLV1117-15CDCYR | 1.5V/800mA, 1.2V dropout, ±1% tolerance, SOT-223 only; no AEC-Q100 Grade 2 rating. | Lower current capability and no extended temperature support - insufficient for 1A continuous loads in harsh environments. | Choose only for space-constrained, lower-current designs where 800mA suffices and automotive grade is not required. |
Compared with AP1117K15G-13 and TLV1117-15CDCYR, ZLDO1117K15TC provides superior thermal robustness (125°C junction), tighter 2% regulation, and guaranteed AEC-Q100 Grade 2 compliance - making it the sole choice for automotive-grade 1A 1.5V regulation where reliability and specification margin are non-negotiable.
Availability
ZLDO1117K15TC is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and medical sensor hubs requiring stable component supply with AEC-Q100 traceability and long-lifecycle assurance.
Supply support for ZLDO1117K15TC 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 solutions, with design centers in Asia, Europe, and the US, and manufacturing in ASE, J-Devices, and its own facilities.
ZLDO1117 belongs to Diodes' high-reliability LDO portfolio targeting automotive, industrial, and medical applications - engineered for extended temperature operation, low-noise regulation, and robust thermal protection in mission-critical power domains.
FAQ
What is the minimum input voltage required for ZLDO1117K15TC to maintain regulation?
The minimum input voltage is 2.7V under recommended operating conditions, ensuring proper regulation without entering dropout. This is derived from the 1.2V max dropout voltage plus the 1.5V output, yielding a 2.7V threshold. Below this, the device enters dropout mode and output voltage drops linearly with input.
Can ZLDO1117K15TC be used with 2.2µF MLCC output capacitors?
No - the datasheet specifies a minimum 4.7µF X7R MLCC (ESR ≤ 0.5Ω) for stability. Using 2.2µF violates the phase margin requirement and risks oscillation under load transients, as confirmed by the SOA curve and stability testing in DS32018 Rev. 7.
Is the TO252 tab electrically isolated from other pins?
No - the exposed tab is internally connected to the VOUT pin, as explicitly stated in the Pin Assignments section ("Tab is Vout"). It must be soldered to a VOUT-coupled copper pour and cannot serve as a separate thermal pad or ground connection.
Does ZLDO1117K15TC require an input capacitor?
While not strictly mandatory for basic regulation, a 1µF ceramic capacitor placed close to the VIN pin is recommended in the Application Information section to prevent input voltage sag during load transients - especially when the regulator is remote from the main power filter.
ZLDO1117K15TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
ZLDO1117K15TC FAQ
1.How can I place an order for ZLDO1117K15TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLDO1117K15TC 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 ZLDO1117K15TC reliable?
The price and inventory of ZLDO1117K15TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLDO1117K15TC is usually 5 days.
3.What payment methods are accepted for ZLDO1117K15TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZLDO1117K15TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZLDO1117K15TC?
ZLDO1117K15TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZLDO1117K15TC 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 ZLDO1117K15TC?
For technical support, including ZLDO1117K15TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLDO1117K15TC requirements.
6.How does Aetrix verify that ZLDO1117K15TC is sourced from the original manufacturer or authorized distributors?
All ZLDO1117K15TC 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 ZLDO1117K15TC meets industry standards.
7.What is the process for return or replacement of ZLDO1117K15TC?
All ZLDO1117K15TC units undergo pre-shipment inspection (PSI). If there is an issue with ZLDO1117K15TC, 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 ZLDO1117K15TC part is unused and in its original packaging.
Return procedure for ZLDO1117K15TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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