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Diodes Incorporated AL17051V33W5-7
- Part No.:
- AL17051V33W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AL17051V33W5-7.pdf
- Description:
- LED HV INT SWITCH SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,919
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Product details
Overview
AL17051V33W5-7 from Diodes Incorporated is a universal AC-input, high-voltage buck converter IC with integrated 700V MOSFET, delivering fixed 3.3V output at up to 50mA, ultra-low 10mW no-load standby power, and 60% system efficiency at full load under 120/230VAC input. It enables compact, optocoupler-free offline power supplies for always-on IoT edge nodes with WPAN connectivity.
For engineers reviewing the AL17051V33W5-7 datasheet, AL17051V33W5-7 pinout, AL17051V33W5-7 application, or AL17051V33W5-7 equivalent, key selection criteria include its 700V integrated MOSFET, CV control architecture, SOT25 package thermal performance (θJA = 125°C/W), and light-load efficiency behavior at 10mA (50%).
Technical Context
The AL17051V33W5-7 implements constant-voltage (CV) regulation via internal feedback derived from VCC capacitor voltage, eliminating optocoupler dependency. Its peak-current-mode DCM operation dynamically adjusts switching frequency (33kHz typ. at full load, decreasing under light load) and modulates minimum off-time (18.5µs typ.) to maintain regulation across 85–300VAC input and 5–50mA output range.
Startup relies on an internal HV regulator charging VCC to 3.2V (VCC_HVOFF), then disabling itself; UVLO re-engages the HV regulator when VCC drops to 2.7V (VCCUVLO). Protection includes auto-restart over-current (200mA threshold), over-load (8192-cycle counter), and thermal shutdown (150°C trip, 120°C recovery hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% - eliminates external feedback resistor network; supports direct powering of 3.3V MCU/RF SoCs. |
| Input Voltage Range | 85–300VAC universal - enables single-BOM design for global mains-powered IoT devices without input voltage configuration. |
| Standby Power | <10mW at no load - meets Energy Star Level VI and EU CoC Tier 2 requirements for always-on connected appliances. |
| Efficiency | 60% at 50mA / 120VAC - delivers usable power from high-impedance AC inputs while minimizing heat in sealed enclosures. |
| Integrated MOSFET | 700V VDSS, 40Ω RDS(ON) - replaces discrete HV switch + driver, reducing BOM count and PCB area in SOT25 footprint. |
| Thermal Protection | 150°C shutdown with 50°C hysteresis - prevents thermal runaway during sustained overload or poor heatsinking in compact designs. |
| Switching Frequency | Adjustable 33kHz (typ.) - balances EMI, core loss, and capacitor ripple; decreases under light load to sustain 50% efficiency at 10mA. |
| Peak Current Limit | 140mA (typ.) - sets maximum energy per cycle; constrains max output to ~60mA in DCM, ensuring stable boundary operation. |
Pinout & Package
AL17051V33W5-7 is housed in a thermally enhanced SOT25 package (5-pin, exposed drain pad) optimized for high-voltage buck topologies with minimal external components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Control supply rail | Charged by internal HV regulator; powers internal logic and gate driver; voltage level (3.2V ON / 2.7V UVLO) controls startup and fault recovery. |
| 2,3,4 - SOURCE | MOSFET source node / GND reference | Common return path for internal power switch and control circuitry; must be low-inductance connection to PCB ground plane. |
| 5 - DRAIN | High-voltage MOSFET drain | Connects directly to rectified AC input (up to 710V absolute max); requires careful creepage/clearance layout per IEC 62368-1. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 700V MOSFET | Reduces external component count by ≥4 (HV switch, driver, level shifter, bootstrap diode), enabling <10mm² solution size. |
| Ultra-low 10mW standby | Enables true "always-on" operation in battery-backed or energy-harvested IoT gateways without compromising annual energy consumption. |
| Auto-adjusting DCM operation | Maintains regulation across 10:1 load range (10–50mA) without mode transition artifacts or audible noise from frequency jumps. |
| Internal error amplifier compensation | Adapts loop response to load step magnitude-faster recovery from 10mA→50mA transients than fixed-compensation controllers. |
| Leading-edge blanking (300ns) | Prevents false current-limit triggering during MOSFET turn-on dV/dt, ensuring reliable operation with standard ferrite-core inductors. |
| Auto-restart protection suite | OTP, OLP, and SCP recover without manual reset-critical for unattended industrial sensors and smart home endpoints. |
Applications
| Smart Home Sensors | Industrial Wireless Nodes |
|---|---|
|
Use Scenario: Battery-less occupancy/motion sensor powered directly from 230VAC mains in EU residential lighting circuits. IC Role / Device Role / Timing Role: Primary HV buck controller providing regulated 3.3V to ESP32-WROOM-32 and PIR signal chain; operates continuously in sleep mode. Use Value: Eliminates need for bulky isolated flyback or costly DC-DC modules; 10mW standby enables >10-year lifetime without maintenance. |
Use Scenario: DIN-rail mounted predictive maintenance node monitoring motor vibration in factory HVAC systems. IC Role / Device Role / Timing Role: Non-isolated 3.3V supply for ARM Cortex-M4 MCU and BLE 5.0 radio; withstands 100ms brownouts per EN 61000-4-11. Use Value: 85–300VAC range covers global industrial voltages; 60% efficiency at 50mA reduces thermal stress in enclosed metal enclosures. |
| White Goods Control Boards | Low-Power IoT Gateways |
|
Use Scenario: Standby power rail for microcontroller and touch interface on refrigerator control panel. IC Role / Device Role / Timing Role: Always-on 3.3V source enabling instant wake-from-sleep response to door-open events or Wi-Fi commands. Use Value: Meets IEC 62301 Ed.2 <0.5W standby requirement; SOT25 package fits tight space behind glass display bezel. |
Use Scenario: Mains-powered Zigbee coordinator bridging legacy wired sensors to cloud platforms. IC Role / Device Role / Timing Role: Single-chip 3.3V supply for multi-radio SoC (Zigbee + Thread + Matter), managing dynamic load sharing between radios. Use Value: Auto-frequency scaling maintains 50% efficiency at 10mA idle current-critical for fanless gateway enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HV buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP174G-33-Z (Monolithic Power) | 40V max input; requires external 600V MOSFET; no integrated HV start-up | Suitable only for DC-fed applications (e.g., PoE-derived 48V); cannot replace AL17051V33W5-7 in AC-input designs | Select only if input is pre-rectified DC and board space allows discrete HV switch + driver. |
| LNK3206D (Power Integrations) | Integrated 725V MOSFET; flyback topology; requires optocoupler for tight CV regulation | Provides reinforced isolation; mandatory for safety-critical loads but adds cost, size, and complexity | Choose only when galvanic isolation is required by end-equipment safety standards (e.g., UL 62368-1 Class II). |
Compared with MP174G-33-Z and LNK3206D, AL17051V33W5-7 uniquely combines universal AC input, integrated 700V switch, optocoupler-free CV regulation, and sub-10mW standby-making it optimal for cost-sensitive, space-constrained, non-isolated IoT power rails where regulatory isolation is not mandated.
Availability
AL17051V33W5-7 is available at Aetrix Electronics and suitable for smart home sensors, industrial wireless nodes, and white goods control boards requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for AL17051V33W5-7 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 for power management, signal integrity, and connectivity applications.
The AL17051 belongs to Diodes' HV offline AC-DC converter product line, engineered specifically for ultra-low-power, non-isolated buck topologies in always-on IoT and appliance control systems.
FAQ
What is the maximum continuous output current supported by AL17051V33W5-7?
The AL17051V33W5-7 is rated for 50mA continuous output current under recommended operating conditions (TA = −40°C to +105°C, 120/230VAC input). Its DCM operation and 140mA peak current limit constrain practical output to ≤60mA; exceeding 50mA risks thermal shutdown in ambient temperatures above 70°C due to SOT25's 125°C/W θJA.
Can AL17051V33W5-7 be used with a full-wave rectifier input stage?
Yes-AL17051V33W5-7 supports both half-wave and full-wave rectification. For full-wave input, use a 1µF high-voltage electrolytic capacitor (C1/C2) instead of 2.2µF; ensure minimum DC bus voltage stays above 70V to prevent thermal shutdown, especially at low-line 85VAC with full-wave configuration.
Does AL17051V33W5-7 require an external dummy load for regulation?
Yes-a 1–3mA dummy load is required on the 3.3V output to maintain regulation under no-load conditions. This ensures sufficient inductor energy transfer to charge the VCC capacitor, which serves as the output voltage sampling node; omitting it causes output voltage rise and potential overvoltage damage to downstream ICs.
How does the AL17051V33W5-7 achieve optocoupler-free regulation?
It samples output voltage indirectly via the VCC capacitor, whose voltage is coupled to the output through the freewheeling diode during MOSFET OFF time. Internal feedback compares this VCC voltage to a precision 3.60V reference (for 3.3V version), adjusting switching duty cycle to maintain regulation without secondary-side sensing components.
AL17051V33W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 700V
- Topology:
- Buck
- Voltage - Start Up:
- 3.05 V
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 6.5V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Over Voltage, UVLO
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-25
- Mounting Type:
- Surface Mount
AL17051V33W5-7 FAQ
1.How can I place an order for AL17051V33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL17051V33W5-7 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 AL17051V33W5-7 reliable?
The price and inventory of AL17051V33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL17051V33W5-7 is usually 5 days.
3.What payment methods are accepted for AL17051V33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL17051V33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL17051V33W5-7?
AL17051V33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL17051V33W5-7 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 AL17051V33W5-7?
For technical support, including AL17051V33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL17051V33W5-7 requirements.
6.How does Aetrix verify that AL17051V33W5-7 is sourced from the original manufacturer or authorized distributors?
All AL17051V33W5-7 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 AL17051V33W5-7 meets industry standards.
7.What is the process for return or replacement of AL17051V33W5-7?
All AL17051V33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AL17051V33W5-7, 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 AL17051V33W5-7 part is unused and in its original packaging.
Return procedure for AL17051V33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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