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Diodes Incorporated AZ1117BH-1.2TRE1
- Part No.:
- AZ1117BH-1.2TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117BH-1.2TRE1.pdf
- Description:
- IC REG LINEAR 1.2V 850MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
AZ1117BH-1.2TRE1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.2 V, 600 mA low dropout linear regulator in SOT-223 package, optimized for low-voltage systems with tight input margin and high transient response requirements. It delivers ±1% output voltage accuracy, 1.2 V dropout at 800 mA, and integrated thermal shutdown and current limit protection. It powers core logic rails in USB peripherals and add-on cards where stable low-noise biasing is critical.
For engineers reviewing the AZ1117BH-1.2TRE1 datasheet, AZ1117BH-1.2TRE1 pinout, AZ1117BH-1.2TRE1 application, or AZ1117BH-1.2TRE1 equivalent, key selection criteria include dropout voltage at full load, RMS output noise (0.003% of VOUT), PSRR (70 dB at 120 Hz), quiescent current (max 6 mA), and thermal shutdown junction temperature (160 °C).
Technical Context
The AZ1117BH-1.2TRE1 uses a trimmed bandgap reference and PNP pass transistor architecture to achieve low dropout and high line/load regulation. Its internal current limit (1.0 A typ.) and thermal shutdown (160 °C trip, 16 °C hysteresis) operate independently of external components.
It requires no external compensation and supports stable operation with 10 μF input and 22 μF output ceramic capacitors. The fixed 1.2 V version integrates precision feedback resistors, eliminating adjustment pins and simplifying layout versus the ADJ variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±1% (ensures reliable core voltage for 1.2 V logic domains) |
| Dropout Voltage | 1.2–1.3 V at 800 mA (enables operation from 2.4 V input in battery-backed systems) |
| PSRR | 70 dB at 120 Hz, 300 mA load (suppresses ripple from upstream switching converters) |
| RMS Output Noise | 0.003% of VOUT (10 Hz–10 kHz; <36 μV RMS for clean analog/RF supply) |
| Quiescent Current | Max 6 mA (minimizes standby power loss in always-on subsystems) |
| Thermal Shutdown | 160 °C junction trip with 16 °C hysteresis (prevents thermal runaway under overload) |
| Current Limit | 0.85–1.15 A (protects IC and PCB traces during short-circuit events) |
Pinout & Package
SOT-223 package with exposed thermal pad (pin 2 connected to die attach paddle); standard footprint compatible with JEDEC TO-261AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Input voltage supply | Accepts 2.4–10 V DC; must be ≥1.2 V + dropout to maintain regulation |
| 2 (OUTPUT) | Regulated output | Delivers stable 1.2 V ±1%; connects directly to load and output capacitor |
| 3 (GND) | Ground reference | Common return path for input/output currents and internal bandgap reference |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.2 V output | Eliminates external resistor network-reduces BOM count and layout area |
| Low dropout (1.2 V @ 800 mA) | Enables single-cell Li-ion or dual-cell NiMH input without boost conversion |
| 0.003% RMS output noise | Meets noise-sensitive requirements for PLLs, ADC references, and RF bias rails |
| 70 dB PSRR at 120 Hz | Rejects switching noise from buck converters feeding intermediate bus rails |
| Integrated thermal shutdown | Self-protects under sustained overload without external circuitry or delay timing |
Applications
| USB Device Power Rail | Add-on Card Core Logic |
|---|---|
Use Scenario: Supplies 1.2 V core voltage to USB 3.0 controller ICs in portable hubs and adapters. IC Role / Device Role / Timing Role: Primary LDO delivering regulated bias to digital logic blocks and PHY transceivers. Use Value: Low noise and fast transient response prevent data corruption during plug/unplug events. |
Use Scenario: Powers FPGA or ASIC core voltage on PCIe add-in cards used in industrial PCs. IC Role / Device Role / Timing Role: Point-of-load regulator for low-voltage I/O banks requiring tight tolerance and low EMI. Use Value: ±1% accuracy ensures setup/hold timing margins remain intact across temperature. |
| DVD Player SoC Supply | PC Motherboard Standby Rail |
Use Scenario: Provides 1.2 V to MPEG decoder and video processing SoC in consumer DVD players. IC Role / Device Role / Timing Role: Main regulator for processor core domain during playback mode. Use Value: 1.2 V dropout allows direct use of 3.3 V rail, reducing component count vs. cascaded regulation. |
Use Scenario: Generates always-on 1.2 V standby voltage for real-time clock and wake-on-LAN circuitry. IC Role / Device Role / Timing Role: Low-quiescent-current LDO maintaining system state during S5 sleep. Use Value: Max 6 mA IQ minimizes battery drain in CMOS RTC backup applications. |
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 |
|---|---|---|---|
| AP1117M-1.2TRG1 | Same 1.2 V output, but rated for 800 mA continuous; higher dropout (1.3 V @ 800 mA) | Marginally lower efficiency in ultra-low-input scenarios; identical thermal shutdown behavior | Preferred when higher current headroom is required and board space allows larger thermal pad |
| LD1117S12TR | 1.2 V output, 800 mA rating, 1.1 V dropout at 800 mA; different pinout (SOT-223, but pin 1 = GND) | Requires PCB redesign due to reversed pin 1/pin 3 assignment; superior dropout performance | Select only if dropout reduction outweighs layout rework cost and thermal resistance is acceptable |
Compared with AP1117M-1.2TRG1, AZ1117BH-1.2TRE1 offers lower dropout and tighter initial accuracy; compared with LD1117S12TR, it avoids pinout conflict but trades 0.1 V higher dropout for guaranteed compatibility with legacy SOT-223 layouts.
Availability
AZ1117BH-1.2TRE1 is available at Aetrix Electronics and suitable for USB device power rails, add-on card core logic, and PC motherboard standby circuits requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for AZ1117BH-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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog IC foundry and fabless designer specializing in power management, LED drivers, and mixed-signal solutions for consumer and industrial markets.
The AZ1117B series targets cost-sensitive, high-volume applications requiring robust fixed-output LDOs with minimal external components-designed specifically for USB, optical storage, and computing peripheral power systems.
FAQ
What is the minimum input voltage required for AZ1117BH-1.2TRE1 to maintain regulation at full load?
The minimum input voltage is 2.4 V: 1.2 V output plus 1.2 V typical dropout at 800 mA. Operation below this threshold causes output voltage to drop linearly with input; datasheet specifies 1.5 V minimum VIN–VOUT differential for guaranteed line regulation performance.
Can AZ1117BH-1.2TRE1 be used with ceramic output capacitors?
Yes-22 μF X5R/X7R ceramic capacitors are explicitly validated in the datasheet for stability. Equivalent series resistance (ESR) down to 10 mΩ is supported, unlike older LDOs requiring tantalum or aluminum electrolytics for phase margin.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches 160 °C, the regulator shuts off output and remains latched until temperature drops by 16 °C (to ~144 °C), then resumes regulation. This hysteresis prevents oscillation near trip point and protects against PCB-level thermal accumulation.
Is AZ1117BH-1.2TRE1 pin-compatible with standard LM1117-1.2 variants?
No-while both use SOT-223, AZ1117BH-1.2TRE1 has INPUT on pin 1, OUTPUT on pin 2, and GND on pin 3; many LM1117 variants assign GND to pin 1. Physical mounting is identical, but PCB layout must match BCD's pin mapping to avoid shorts.
AZ1117BH-1.2TRE1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AZ1117B
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 1.3V @ 800mA
- Current - Output:
- 850mA
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Thermal Shutdown
- Operating Temperature:
- -20°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AZ1117BH-1.2TRE1 FAQ
1.How can I place an order for AZ1117BH-1.2TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117BH-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 AZ1117BH-1.2TRE1 reliable?
The price and inventory of AZ1117BH-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 AZ1117BH-1.2TRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117BH-1.2TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117BH-1.2TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117BH-1.2TRE1?
AZ1117BH-1.2TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117BH-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 AZ1117BH-1.2TRE1?
For technical support, including AZ1117BH-1.2TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117BH-1.2TRE1 requirements.
6.How does Aetrix verify that AZ1117BH-1.2TRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117BH-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 AZ1117BH-1.2TRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117BH-1.2TRE1?
All AZ1117BH-1.2TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117BH-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 AZ1117BH-1.2TRE1 part is unused and in its original packaging.
Return procedure for AZ1117BH-1.2TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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