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Alpha & Omega Semiconductor Inc. AOZ1373DI-01
- Part No.:
- AOZ1373DI-01
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
AOZ1373DI-01.pdf
- Description:
- ECPOWER 20V 39M PROTECTION SWITC
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
AOZ1373DI-01 from Alpha & Omega Semiconductor is a high-side protection switch with true reverse-current blocking (TRCB), programmable over-voltage protection, and auto-restart fault recovery. It operates from 3.4V to 22V input, delivers 39mΩ typical RON, supports up to 3.5A DC load current, and is rated for 28V absolute maximum on VIN/VOUT - designed specifically for USB Type-C PD power path control in portable and docking systems.
For engineers reviewing the AOZ1373DI-01 datasheet, pinout, applications, or equivalent options, key selection considerations include its 26mV TRCB threshold, 64ms auto-restart interval, -40°C to +85°C operating range, 3mm × 3mm DFN-12L package with exposed thermal pad, and ±8kV IEC61000-4-2 ESD rating on VIN/VOUT.
Technical Context
The AOZ1373DI-01 integrates dual back-to-back N-channel MOSFETs to enable bidirectional isolation and true reverse-current blocking at all times. Its control logic monitors VIN for UVLO (3.35V typ), OVP (selectable via POVP resistor), and die temperature (140°C shutdown with 30°C hysteresis), while FLTB provides open-drain fault signaling.
Soft-start is implemented via external capacitor (CSS) on SS pin, enabling linear VOUT ramp-up with programmable slew rate; ENB is active-low with 0.6V logic-low threshold and internal pull-down. The device uses an internal 8µA current source on POVP to set OVP thresholds - 24V when POVP = 0V, 5.8V when POVP = open.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 22V - supports full USB PD 3.0 voltage range and legacy 5V/12V rails. |
| RON (Typical) | 39mΩ at 20V - minimizes conduction loss and thermal rise under 3.5A load. |
| TRCB Threshold | 26mV (VOUT − VIN) - blocks reverse current before parasitic body diode conduction begins. |
| OVP Recovery | Auto-restart every 64ms - enables self-clearing fault handling without host intervention. |
| Ambient Temp Range | -40°C to +85°C - qualified for industrial and portable computing environments. |
| ESD Rating (VIN/VOUT) | ±8kV HBM per IEC61000-4-2 - meets USB interface surge immunity requirements. |
| Package | 3mm × 3mm DFN-12L with exposed thermal pad - enables compact layout and efficient PCB heat dissipation. |
Pinout & Package
AOZ1373DI-01 is housed in a 3mm × 3mm DFN-12L package with exposed thermal pad (EXP) that must be soldered to PCB ground for thermal performance. Pin 1–2 and 11–12 are paralleled VOUT and VIN terminals respectively; pins 8–10 are no-connect and must remain floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pins 1, 2) | Switch output terminal | Connects to downstream load (e.g., USB VBUS rail); supports 28V abs max and ±8kV ESD. |
| POVP (Pin 3) | OVP threshold programming node | Accepts external resistor to set OVP threshold (0V → 24V; open → 5.8V) using internal 8µA bias current. |
| FLTB (Pin 4) | Open-drain fault indicator | Pulled low during UVLO, OVP, TRCB, or thermal shutdown; requires external pull-up for system monitoring. |
| ENB (Pin 5) | Active-low enable input | Logic low ≤0.6V enables switch; internal 10µA pull-down ensures default-off state when un-driven. |
| GND (Pin 6) | Power and signal reference | Common return for internal circuitry, FLTB, SS, and POVP; connects to EXP thermal pad. |
| SS (Pin 7) | Soft-start timing node | External capacitor (CSS) sets VOUT ramp time; formula tSS ≈ 0.0023 × (VIN − VOVP) × CSS (µs). |
| VIN (Pins 11, 12) | Switch input terminal | Connects to upstream power source (e.g., PD controller output); supports 28V abs max and ±8kV ESD. |
| EXP | Exposed thermal pad | Must be soldered to multi-layer PCB ground plane with multiple vias to achieve θJA = 54°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse Current Blocking (TRCB) | Blocks reverse conduction at 26mV VOUT–VIN differential - eliminates need for external blocking diode in USB PD sink paths. |
| Programmable Over-Voltage Protection | Two-point OVP setting (5.8V or 24V) via single resistor on POVP - supports both 5V and 20V PD profiles without firmware change. |
| Auto-Restart Fault Recovery | 64ms fixed restart interval after fault clears - maintains power continuity in transient overvoltage events without host re-enabling. |
| Adjustable Soft-Start Slew Rate | Linear VOUT ramp controlled by CSS capacitor - prevents inrush into large downstream capacitance (e.g., 120µF COUT). |
| Integrated Thermal Shutdown | 140°C trip with 30°C hysteresis - protects against sustained overload or poor heatsinking in compact enclosures. |
Applications
| USB Type-C Docking Station | Portable Laptop Power Switch |
|---|---|
Use Scenario: A Thunderbolt 3 dock routes up to 20V/5A from host to peripherals while protecting against reverse feed from connected monitors or storage devices. IC Role / Device Role / Timing Role: High-side PD power path switch with TRCB and OVP - isolates VBUS domains and enforces directional power flow. Use Value: Prevents damage from miswired cables or hot-plug events by blocking 26mV reverse potential before body diode turn-on, eliminating need for discrete Schottky diodes. |
Use Scenario: A 13-inch notebook implements dual-input PD charging (AC adapter + USB-C port) with automatic source arbitration and overvoltage hardening. IC Role / Device Role / Timing Role: Input protection switch placed between PD controller and system PMIC - handles 3.4–22V input with auto-restart OVP. Use Value: Enables safe 20V operation with 64ms auto-recovery from transient surges, reducing firmware complexity versus latch-off alternatives requiring manual reset. |
| USB-C Monitor Power Delivery | Mobile Dongle Power Management |
Use Scenario: A 4K monitor accepts 15W/27W/45W PD input and distributes regulated power to display panel, USB hub, and audio codec. IC Role / Device Role / Timing Role: Primary VBUS input switch with soft-start and thermal monitoring - manages inrush into large bulk capacitance and prevents overheating. Use Value: 39mΩ RON limits conduction loss to <150mW at 1.5A, allowing use of minimal copper area while maintaining <85°C junction temp in sealed enclosure. |
Use Scenario: A compact HDMI-to-USB-C dongle draws power from host laptop while delivering video and data - must survive accidental 20V connection to 5V-only ports. IC Role / Device Role / Timing Role: Overvoltage clamp and reverse-blocking switch - protects downstream 5V LDOs and USB transceivers from misapplied voltage. Use Value: ±8kV IEC61000-4-2 rating on VIN/VOUT and 24V OVP threshold prevent latch-up or destruction during real-world cable swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side protection switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS25940ARVCR | 40V abs max, 32mΩ RON, integrated current sensing, no TRCB, 1.2ms OVP response | Requires external reverse-blocking diode; better suited for current-monitoring designs than pure PD isolation | Select when precise load current reporting is required and TRCB is handled elsewhere in BOM. |
| RTQ2132BGQW | 28V abs max, 45mΩ RON, latch-off fault mode, no programmable OVP, 15mV TRCB threshold | Latch-off behavior demands host GPIO toggle to clear faults - increases firmware overhead vs. AOZ1373DI-01's auto-restart | Select when system-level fault management mandates explicit reset control and tighter TRCB threshold is critical. |
Compared with TPS25940ARVCR and RTQ2132BGQW, AOZ1373DI-01 uniquely combines 26mV TRCB, 64ms auto-restart, and dual-point OVP in a 3×3mm DFN - simplifying USB-C PD designs where reverse feed prevention and autonomous surge recovery are mandatory.
Availability
AOZ1373DI-01 is available at Aetrix Electronics and suitable for USB Type-C docking stations, portable laptop power switches, and monitor PD input stages requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for AOZ1373DI-01 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, power ICs, and advanced packaging for power conversion and protection.
The AOZ1373DI product line delivers ECPower™-branded high-side switches optimized for USB Type-C PD applications, emphasizing true reverse-current blocking, robust surge immunity, and compact thermal design for space-constrained portable systems.
FAQ
What is the function of the POVP pin on AOZ1373DI-01?
The POVP pin on AOZ1373DI-01 sets the over-voltage protection threshold using an external resistor. An internal 8µA current source biases POVP, producing two selectable OVP points: 24V when POVP is grounded, or 5.8V when POVP is left open. This allows AOZ1373DI-01 to adapt to different USB PD voltage profiles without changing firmware or hardware topology.
How does AOZ1373DI-01 implement True Reverse Current Blocking?
AOZ1373DI-01 implements True Reverse Current Blocking (TRCB) by detecting when VOUT exceeds VIN by just 26mV and immediately turning off the internal back-to-back MOSFETs. This occurs before the body diodes conduct, eliminating reverse leakage entirely. The FLTB pin asserts low within 500ns of TRCB activation, enabling rapid system-level fault response in AOZ1373DI-01 designs.
What is the difference between AOZ1373DI-01 and AOZ1373DI-02?
AOZ1373DI-01 features auto-restart fault recovery with a fixed 64ms restart interval after fault clearance, while AOZ1373DI-02 uses latch-off behavior requiring manual ENB toggle or power cycle to resume operation. Both share identical RON, TRCB, OVP, and thermal specs, but AOZ1373DI-01 reduces system firmware complexity in transient-heavy environments like USB-C docks.
What thermal design guidance applies to AOZ1373DI-01?
AOZ1373DI-01 requires the exposed thermal pad (EXP) to be soldered directly to a multi-layer PCB ground plane with ≥6 thermal vias (0.3mm diameter) connecting to inner ground layers. The recommended land pattern matches the 3mm × 3mm DFN-12L footprint, and achieving θJA = 54°C/W depends on ≥250mm² of continuous copper under EXP - critical for sustaining 3.5A loads at +85°C ambient in AOZ1373DI-01 implementations.
Can AOZ1373DI-01 be used in 5V-only applications?
Yes, AOZ1373DI-01 supports 3.4V to 22V input and functions reliably at 5V nominal operation. Its UVLO activates below 3.35V, ensuring clean startup, and RON rises only marginally to 41mΩ at 5V - still enabling <100mW loss at 1.5A. The 26mV TRCB threshold and ±8kV ESD rating make AOZ1373DI-01 especially valuable in 5V USB-C dongles where reverse feed and ESD robustness are critical.
AOZ1373DI-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 12-VFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 3.4V ~ 22V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 39mOhm
- Input Type:
- Non-Inverting
- Features:
- Auto Restart, Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, Over Voltage, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x3)
AOZ1373DI-01 FAQ
1.How can I place an order for AOZ1373DI-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1373DI-01 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 AOZ1373DI-01 reliable?
The price and inventory of AOZ1373DI-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1373DI-01 is usually 5 days.
3.What payment methods are accepted for AOZ1373DI-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1373DI-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1373DI-01?
AOZ1373DI-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1373DI-01 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 AOZ1373DI-01?
For technical support, including AOZ1373DI-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1373DI-01 requirements.
6.How does Aetrix verify that AOZ1373DI-01 is sourced from the original manufacturer or authorized distributors?
All AOZ1373DI-01 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 AOZ1373DI-01 meets industry standards.
7.What is the process for return or replacement of AOZ1373DI-01?
All AOZ1373DI-01 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1373DI-01, 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 AOZ1373DI-01 part is unused and in its original packaging.
Return procedure for AOZ1373DI-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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