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Diodes Incorporated AZ1117H-1.2TRE1
- Part No.:
- AZ1117H-1.2TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117H-1.2TRE1.pdf
- Description:
- IC REG LINEAR 1.2V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:7,961
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Product details
Overview
AZ1117H-1.2TRE1 from Diodes Incorporated is a fixed-output 1.2 V, 1 A low-dropout linear regulator in SOT223 package, featuring 1.15 V dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It delivers stable bias for low-voltage logic rails in space-constrained embedded systems requiring high PSRR (75 dB) and low RMS noise (0.003% of VOUT).
For engineers reviewing the AZ1117H-1.2TRE1 datasheet, AZ1117H-1.2TRE1 pinout, AZ1117H-1.2TRE1 application, or AZ1117H-1.2TRE1 equivalent, key selection criteria include dropout voltage at 1 A, thermal resistance (θJA = 120 °C/W), load regulation (≤10 mV), quiescent current (5–10 mA), and RoHS-compliant lead-free SOT223 packaging.
Technical Context
The AZ1117H-1.2TRE1 implements a trimmed bandgap reference with internal error amplifier and PNP pass transistor to maintain regulated 1.2 V output across 10 mA–1 A load range. Its architecture supports operation from 3.0 V to 10 V input while sustaining ≤1.25 V dropout up to 1 A.
Thermal shutdown activates at +150 °C junction temperature with +25 °C hysteresis; current limit is factory-trimmed to 1.25–1.35 A under VIN–VOUT = 2 V. Ripple rejection is specified at 60–75 dB (120 Hz, 22 µF tantalum output capacitor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±2% (1.176–1.248 V at 10 mA–1 A, ensuring compatibility with 1.2 V core logic) |
| Dropout Voltage | 1.15 V max at 1 A (enables regulation from 3.0 V input down to 1.2 V output) |
| Load Regulation | ≤10 mV (0.83% of VOUT over 10 mA–1 A, minimizing voltage sag under dynamic load) |
| PSRR | 75 dB typical at 120 Hz (suppresses AC ripple from upstream switching supplies) |
| Quiescent Current | 5–10 mA (low static power draw for battery-sensitive or always-on subsystems) |
| Thermal Shutdown | Triggers at +150 °C TJ with +25 °C hysteresis (prevents permanent die damage during overload) |
| Junction Temp Range | −40 °C to +125 °C (supports industrial and automotive under-hood ambient conditions) |
Pinout & Package
SOT223 package: 4-pin thermally enhanced surface-mount outline with exposed thermal pad (pin 2 is input, pin 3 is output, pin 1 is ground; pin 4 is tab/thermal pad connected to output internally).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (GND) | Ground reference | Return path for internal bias and error amplifier; must be low-impedance connection to minimize noise coupling |
| Pin 2 (INPUT) | Unregulated input supply | Accepts 3.0–10 V DC; requires ≥10 µF ceramic or tantalum input capacitor for stability |
| Pin 3 (OUTPUT) | Regulated 1.2 V output | Delivers up to 1 A; requires ≥22 µF output capacitance (tantalum or low-ESR ceramic) for transient response |
| Pin 4 (Tab) | Thermal pad / Output connection | Internally tied to OUTPUT; must be soldered to PCB copper pour for θJA = 120 °C/W thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout | 1.15 V at 1 A enables use with 3.3 V or 5 V rails where headroom is limited |
| Trimmed current limit | 1.25–1.35 A ensures predictable short-circuit behavior without external foldback circuitry |
| On-chip thermal shutdown | +150 °C trip with +25 °C hysteresis provides autonomous protection during sustained overload |
| ±2% output accuracy | Meets tight tolerance requirements for 1.2 V FPGA I/O banks and microcontroller core supplies |
| Lead-free & RoHS compliant | Fully EU Directive 2015/863/EU compliant; no purposely added lead or halogens |
Applications
| PC Motherboard VRM Auxiliary Rail | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Powers 1.2 V auxiliary logic on ATX motherboard VRMs, feeding PCIe slot control ICs and SMBus interface buffers. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, low-noise bias independent of main CPU VDDQ rail switching noise. Use Value: 75 dB PSRR suppresses 120 Hz ripple from bulk capacitors; 0.003% RMS noise prevents timing jitter in digital control loops. |
Use Scenario: Supplies 1.2 V gate driver logic and timing controller I/O in 24-bit RGB LCD panels. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling display timing ICs from noisy 3.3 V system bus. Use Value: 10 mV load regulation ensures consistent logic threshold margins across panel brightness levels and temperature ranges. |
| Graphic Card Memory Interface Bias | ADSL Modem PHY Core Supply |
Use Scenario: Delivers 1.2 V to GDDR6 memory interface buffers and serializer/deserializer logic on discrete GPU PCBs. IC Role / Device Role / Timing Role: Low-dropout regulator placed adjacent to memory controller ASIC to minimize IR drop and EMI. Use Value: 1.15 V dropout allows direct derivation from 3.3 V plane, reducing need for intermediate conversion stages. |
Use Scenario: Provides stable 1.2 V core supply to ADSL line driver PHY ICs operating in temperature-variable DSLAM cabinets. IC Role / Device Role / Timing Role: Industrial-grade LDO maintaining regulation across −40 °C to +85 °C ambient with no derating. Use Value: −40 °C to +125 °C junction rating ensures reliability in sealed, fanless telecom enclosures with high thermal resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29152-1.2WT | Higher dropout (1.5 V at 1.5 A); TO220-3 package only; higher quiescent current (15 mA) | Requires larger heatsink due to θJA = 60 °C/W; less suitable for SMT-only designs | Select when higher current (1.5 A) and through-hole mounting are acceptable trade-offs for legacy board reuse |
| AP1117-1.2V | Same SOT223 footprint; ±2% accuracy; but lower PSRR (65 dB) and wider dropout spread (1.1–1.3 V) | Marginally reduced noise immunity in high-EMI environments like switch-mode power supply proximity | Choose for cost-sensitive designs where 10 dB PSRR margin is noncritical and thermal design matches SOT223 layout |
Compared with MIC29152-1.2WT and AP1117-1.2V, the AZ1117H-1.2TRE1 offers superior thermal performance in SMT form factor (θJA = 120 °C/W), tighter dropout consistency (1.15 V typ), and higher PSRR-making it optimal for compact, noise-sensitive 1.2 V logic rails.
Availability
AZ1117H-1.2TRE1 is available at Aetrix Electronics and suitable for PC motherboard VRMs, LCD monitor logic supplies, graphic card memory interfaces, and ADSL modem PHY cores requiring stable component supply with full RoHS compliance and SOT223 surface-mount compatibility.
Supply support for AZ1117H-1.2TRE1 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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection devices for industrial, computing, and communications markets.
The AZ1117 series targets cost-effective, thermally robust linear regulation in consumer and industrial equipment where simplicity, reliability, and lead-free compliance are critical-particularly in legacy-compatible 1.2 V–5.0 V fixed-output applications.
FAQ
What is the minimum input voltage required for AZ1117H-1.2TRE1 to regulate at full 1 A load?
The minimum input voltage is 2.35 V: 1.2 V output plus maximum dropout of 1.15 V at 1 A. Operation below this causes dropout mode, where output tracks input minus saturation voltage. The datasheet specifies guaranteed regulation for VIN ≥ 3.0 V to accommodate line and load transients while maintaining 1% margin.
Can AZ1117H-1.2TRE1 be used with ceramic output capacitors?
Yes, but with caution: the datasheet specifies stability with ≥22 µF tantalum or low-ESR aluminum electrolytic capacitors. Ceramic capacitors require careful ESR emulation (e.g., series resistor) or selection of types with ≥5 mΩ ESR to avoid oscillation, as the control loop is optimized for higher-ESR outputs.
Does AZ1117H-1.2TRE1 require an input capacitor?
Yes-an input capacitor of ≥10 µF (ceramic or tantalum) is mandatory per the datasheet to prevent oscillation and suppress high-frequency noise from upstream sources. Without it, the regulator may exhibit instability or fail to reject switching noise from preceding DC/DC converters.
Is AZ1117H-1.2TRE1 pin-compatible with other AZ1117 variants in SOT223?
Yes-all AZ1117 fixed-output versions (1.2 V, 1.5 V, 1.8 V, etc.) and the adjustable variant share identical SOT223 pinout (GND–IN–OUT–Tab). However, output voltage and accuracy differ; substituting without verifying downstream logic voltage tolerances risks functional failure or accelerated wear.
AZ1117H-1.2TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117
- 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):
- 15V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.25V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AZ1117H-1.2TRE1 FAQ
1.How can I place an order for AZ1117H-1.2TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117H-1.2TRE1 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 AZ1117H-1.2TRE1 reliable?
The price and inventory of AZ1117H-1.2TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117H-1.2TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117H-1.2TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117H-1.2TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117H-1.2TRE1?
AZ1117H-1.2TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117H-1.2TRE1 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 AZ1117H-1.2TRE1?
For technical support, including AZ1117H-1.2TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117H-1.2TRE1 requirements.
6.How does Aetrix verify that AZ1117H-1.2TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117H-1.2TRE1 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 AZ1117H-1.2TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117H-1.2TRE1?
All AZ1117H-1.2TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117H-1.2TRE1, 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 AZ1117H-1.2TRE1 part is unused and in its original packaging.
Return procedure for AZ1117H-1.2TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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