My Inquiry
My Account
Diodes Incorporated AZ1117H-ADJTRE1
- Part No.:
- AZ1117H-ADJTRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AZ1117H-ADJTRE1.pdf
- Description:
- IC REG LINEAR POS ADJ 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:10,337
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AZ1117H-ADJTRE1 from Diodes Incorporated is an adjustable low-dropout linear regulator delivering 1A output current with 1.15V dropout at full load, ±1% reference voltage accuracy (1.25V), and integrated thermal shutdown and current limiting. It operates across –40°C to +125°C and is commonly used in PC motherboard VRM post-regulation stages where precise, stable 1.25–12V biasing is required.
For engineers reviewing the AZ1117H-ADJTRE1 datasheet, AZ1117H-ADJTRE1 pinout, AZ1117H-ADJTRE1 application, or AZ1117H-ADJTRE1 equivalent, key selection criteria include dropout voltage at 1A, adjust pin current (≤120 µA), minimum load requirement (1.7–5 mA), thermal resistance in SOT223 (θJA = 120°C/W), and compatibility with standard 2-resistor feedback networks for custom output voltages.
Technical Context
The AZ1117H-ADJTRE1 implements a bandgap-referenced error amplifier driving a PNP pass transistor, enabling stable regulation with only two external resistors for output voltage programming. Its trimmed reference ensures 1.238–1.270 V tolerance over temperature and load.
Internal protection includes foldback current limiting (1.25–1.35 A) and thermal shutdown activation at +150°C with +25°C hysteresis. The device requires no external compensation and maintains ≥60 dB ripple rejection at 120 Hz with 22 µF tantalum output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A maximum continuous - supports single-rail power delivery for microcontrollers or FPGAs requiring stable low-noise supply. |
| Dropout Voltage | 1.15 V at 1 A - enables operation from 5 V input to 3.3 V output with margin, critical for battery-powered or multi-rail systems. |
| Reference Voltage | 1.250 V ±1% - sets output precision via R1/R2 divider; enables 1.25–12 V programmability with <0.4% load regulation error. |
| Adjust Pin Current | 60–120 µA - limits resistor-divider power loss and improves light-load efficiency in adjustable configurations. |
| Thermal Shutdown | Activates at +150°C junction temperature - protects against sustained overload or inadequate heatsinking in compact SOT223 packages. |
| Ripple Rejection | 60–75 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO's input. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and embedded applications without derating up to max ambient. |
Pinout & Package
Supplied in RoHS-compliant SOT223 package (3-pin, surface-mount, exposed thermal pad). Thermal resistance θJA = 120°C/W (no heatsink); θJC = 25°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: OUTPUT | Regulated output node | Delivers stabilized voltage; requires ≥10 µF ceramic/tantalum capacitor for stability and transient response. |
| Pin 2: INPUT | Unregulated input supply | Accepts up to 20 V; must exceed VOUT by ≥1.15 V at 1 A to maintain regulation. |
| Pin 3: ADJ | Feedback reference node | Connects to resistor divider; 1.25 V reference applied here determines output: VOUT = 1.25 × (1 + R2/R1) + IADJ×R2. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 1.15 V @ 1 A - minimizes power loss and heat generation in space-constrained SOT223 layout. |
| Trimmed bandgap reference | ±1% accuracy over temperature and load - eliminates need for post-production calibration in precision analog subsystems. |
| Integrated protection | Current limit + thermal shutdown - prevents damage during short-circuit or thermal runaway without external circuitry. |
| Adjustable output range | 1.25 V to 12 V - supports diverse rail requirements using only two resistors, reducing BOM count vs. fixed-voltage variants. |
| Lead-free & RoHS compliant | SOT223 package meets EU Directive 2015/863/EU - suitable for global industrial and consumer product certifications. |
Applications
| PC Motherboard VRM | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Post-regulation of 5 V or 3.3 V rails for chipset I/O, USB PHY, or display interface logic. IC Role / Device Role / Timing Role: Low-noise linear regulator providing clean, stable bias for timing-sensitive digital interfaces. Use Value: 0.003% RMS output noise and 75 dB ripple rejection prevent jitter-induced data errors in LVDS or TMDS links. |
Use Scenario: Generating 2.5 V or 3.3 V for LCD controller, backlight driver logic, or touch panel MCU. IC Role / Device Role / Timing Role: Adjustable LDO supplying configurable logic voltage with minimal board area. Use Value: SOT223 footprint and 1.15 V dropout allow direct regulation from 5 V bus without intermediate buck stage. |
| Graphic Card Auxiliary Rail | Telecom Equipment Biasing |
Use Scenario: Providing 1.8 V or adjustable voltage for GPU memory interface buffers or PCIe endpoint logic. IC Role / Device Role / Timing Role: Precision-adjustable regulator ensuring voltage compliance for high-speed SerDes receivers. Use Value: ±1% reference accuracy and <0.4% load regulation maintain signal integrity margins under dynamic load transients. |
Use Scenario: Generating isolated 3.3 V or 5 V bias for line card management controllers or optical transceiver modules. IC Role / Device Role / Timing Role: Industrial-grade LDO supporting long-life telecom infrastructure with extended temperature operation. Use Value: –40°C to +125°C operating range and thermal hysteresis ensure reliability in unventilated chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29302WU | Higher dropout (0.4 V typical at 3 A), but rated for 3 A output; TO263 package; higher quiescent current (45 mA). | Better suited for high-current, low-input-margin designs; less optimal for SOT223 space-constrained layouts. | Select when >1 A output or lower dropout at lighter loads is required; verify thermal design for SOT223 replacement. |
| LD1117S33TR | Fixed 3.3 V output only; same SOT223 package; 1.2 V dropout at 800 mA; STMicroelectronics part. | Not adjustable; limited to single-rail use; lacks ADJ pin flexibility for multi-voltage systems. | Choose only if fixed 3.3 V suffices and cost sensitivity outweighs configurability needs. |
Compared with MIC29302WU and LD1117S33TR, the AZ1117H-ADJTRE1 uniquely balances 1 A capability, true adjustability, SOT223 footprint, and sub-1.2 V dropout-making it optimal for compact, multi-rail embedded systems requiring design flexibility without sacrificing thermal performance.
Availability
AZ1117H-ADJTRE1 is available at Aetrix Electronics and suitable for PC motherboard VRM, LCD monitor logic supply, and telecom equipment biasing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AZ1117H-ADJTRE1 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 solutions, with emphasis on power management, signal integrity, and protection devices.
The AZ1117 series targets cost-sensitive, high-volume linear regulation applications in computing, consumer, and industrial electronics-designed for simplicity, reliability, and drop-in compatibility with legacy 1117 footprints.
FAQ
What is the minimum load current required for stable operation of AZ1117H-ADJTRE1?
The AZ1117H-ADJTRE1 requires a minimum load current of 1.7–5 mA depending on junction temperature, as specified in the Electrical Characteristics table for the ADJ version. This ensures proper biasing of the internal error amplifier and prevents output voltage drift or oscillation, especially at light loads or elevated temperatures.
Can AZ1117H-ADJTRE1 be used with ceramic output capacitors?
Yes, the AZ1117H-ADJTRE1 is stable with ceramic output capacitors ≥10 µF, provided ESR is ≥15 mΩ. Unlike older LDOs, it does not require high-ESR tantalum capacitors; however, adding a 1–10 Ω damping resistor in series with the capacitor may improve transient response in high-dV/dt applications.
How does thermal shutdown hysteresis affect system behavior during overload?
The AZ1117H-ADJTRE1 shuts down at +150°C junction temperature and re-enables only after cooling by +25°C (to ~+125°C), preventing rapid cycling during sustained overload. This hysteresis ensures safe cooldown before restart, avoiding thermal stress on the die and downstream components in enclosed or poorly ventilated enclosures.
What is the impact of adjust pin current (IADJ) on output voltage accuracy?
IADJ (60–120 µA) flows through the R2 resistor in the feedback divider, introducing a voltage error term (IADJ × R2) that shifts VOUT beyond the ideal 1.25 × (1 + R2/R1) equation. To limit this error to <1%, R2 should be ≤10 kΩ; higher values degrade accuracy and increase sensitivity to IADJ variation over temperature.
AZ1117H-ADJTRE1 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 13.75V
- 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-ADJTRE1 FAQ
1.How can I place an order for AZ1117H-ADJTRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ1117H-ADJTRE1 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-ADJTRE1 reliable?
The price and inventory of AZ1117H-ADJTRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ1117H-ADJTRE1 is usually 5 days.
3.What payment methods are accepted for AZ1117H-ADJTRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ1117H-ADJTRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ1117H-ADJTRE1?
AZ1117H-ADJTRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ1117H-ADJTRE1 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-ADJTRE1?
For technical support, including AZ1117H-ADJTRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ1117H-ADJTRE1 requirements.
6.How does Aetrix verify that AZ1117H-ADJTRE1 is sourced from the original manufacturer or authorized distributors?
All AZ1117H-ADJTRE1 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-ADJTRE1 meets industry standards.
7.What is the process for return or replacement of AZ1117H-ADJTRE1?
All AZ1117H-ADJTRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ1117H-ADJTRE1, 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-ADJTRE1 part is unused and in its original packaging.
Return procedure for AZ1117H-ADJTRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ1117H-ADJTRE1 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
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
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…
