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Alpha & Omega Semiconductor Inc. AOZ1356LI-01
- Part No.:
- AOZ1356LI-01
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 12-UFBGA, WLCSP
- Datasheet:
-
AOZ1356LI-01.pdf
- Description:
- 5V/3A EC POWER SMART PROTECTION
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
AOZ1356LI-01 from Alpha and Omega Semiconductor is a 5V/3A ECPower™ protection switch with True Reverse-Current Blocking (TRCB), programmable current limit (3.5A max), 34mΩ typical RON, and USB PD Fast Role Swap support. It operates from 3.4V–5.5V input, features 28V-rated VOUT, thermal shutdown at 140°C (20°C hysteresis), and targets USB PD power source switching in portable electronics.
For engineers reviewing the AOZ1356LI-01 datasheet, pinout, applications, or equivalent options, key selection factors include its auto-restart fault recovery mode, fast turn-on time (≤100µs), TRCB response (600ns), FRS-compliant 80µs recovery, and WLCSP-12 package compatibility with high-density USB-C power path layouts.
Technical Context
The AOZ1356LI-01 integrates a low-RON N-channel MOSFET power switch with independent UVLO (3.25V threshold, 150mV hysteresis), OVP (5.8V threshold, 250mV hysteresis), and thermal shutdown (140°C/120°C hysteresis) circuits. Its control logic enables simultaneous enforcement of over-current (programmed via ILIM pin), reverse-current blocking (trip at +25mV VOUT–VIN), and fast role swap timing.
It implements dual-mode enable control: EN pin activates the switch only when VIN exceeds UVLO, while FON pin overrides normal soft-start to achieve ≤100µs fast turn-on and enables immediate recovery from TRCB events in 80µs. The FLTB open-drain fault indicator reports OCP and thermal faults after 12ms and immediate assertion respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V–5.5V - Valid for USB 5V supply rails with ±10% tolerance and brown-out immunity |
| Max Output Current | 3.5A - Sustained load capability with external RLIM resistor programming and thermal derating |
| RON (Typical) | 34mΩ - Enables <170mW conduction loss at 3A, critical for thermal management in compact WLCSP |
| Thermal Shutdown | 140°C with 20°C hysteresis - Auto-restarts at ~120°C, preventing latch-off during transient overloads |
| TRCB Response Time | 600ns - Blocks reverse current before system-level damage occurs during hot-plug or adapter swap |
| Fast Turn-On Time | 50–100µs - Meets USB PD 3.0 Fast Role Swap requirement for VOUT ≥4.75V within 80µs |
| Quiescent Current | 125µA active / 6µA shutdown - Minimizes battery drain in always-on USB-C power delivery paths |
Pinout & Package
AOZ1356LI-01 uses a 1.31mm × 1.81mm WLCP (WLCSP-12) package with 0.4mm pitch and 12 solder bumps. Thermal resistance is 84°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1A, 1B, 1C) | Power input supply rail | Internally tied inputs accepting 3.4–5.5V; connects to internal regulator and gate drive |
| GND (2A, 2B, 2C) | Power ground reference | Low-impedance return path for switch current and control circuitry; requires solid ground plane |
| VOUT (3A, 3B) | Switched output power rail | 28V absolute max rating; delivers regulated 5V to USB-C port or downstream load |
| EN (3D) | Enable control input | Active-high logic interface (1.4V threshold); toggling clears faults in auto-restart mode |
| FON (3C) | Fast-On control input | Active-high signal enabling sub-100µs turn-on and immediate TRCB recovery; internally pulled down |
| ILIM (2D) | Current limit set node | Analog input accepting 0–2V; sets trip threshold via external 1% resistor (e.g., 14.3kΩ = 1A) |
| FLTB (1D) | Open-drain fault indicator | Asserts low on OCP (12ms delay) or thermal shutdown; requires external 5V pull-up (RFLTB) |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse-Current Blocking (TRCB) | Prevents backfeed from VOUT to VIN in both enabled and disabled states, with 600ns detection and 80µs recovery |
| USB PD Fast Role Swap Support | Enables role reversal from sink to source in ≤80µs via coordinated FON activation and TRCB recovery |
| Programmable Current Limit | Adjustable 0.45–3.92A range using single 1% resistor on ILIM pin, supporting diverse load profiles |
| Auto-Restart Fault Recovery | Self-resumes operation 24ms after OVP or thermal fault removal-no host intervention required |
| Low Quiescent Power | 125µA operating / 6µA shutdown current extends battery life in portable USB-C devices |
Applications
| USB PD Power Source Switch | Smartphone/Tablet Charging Circuit |
|---|---|
Use Scenario: Managing bidirectional 5V power routing in USB-C ports supporting DRP (Dual-Role Port) functionality. IC Role / Device Role / Timing Role: Protection switch enforcing voltage/current limits, blocking reverse current, and executing Fast Role Swap transitions. Use Value: Enables compliant USB PD 3.0 role swap within 80µs while maintaining 28V VOUT rating for adapter fault tolerance. |
Use Scenario: Isolating and protecting the main battery-fed 5V rail during wired charging or OTG power delivery. IC Role / Device Role / Timing Role: High-side load switch with TRCB, programmable OCP, and thermal shutdown for battery safety. Use Value: Prevents reverse current into battery during adapter hot-plug and limits inrush to protect Li-ion cells during startup. |
| Notebook/Ultrabook USB-C Port | Portable Device Power Path Management |
Use Scenario: Controlling power delivery to USB-C peripherals while supporting alternate modes and power sourcing. IC Role / Device Role / Timing Role: ECPower™ switch providing over-voltage, over-current, and thermal protection with fast recovery. Use Value: Maintains stable 5V output under dynamic load steps up to 3.5A and survives 28V transients on VOUT. |
Use Scenario: Enabling/disabling auxiliary 5V rails for accessories (e.g., docks, displays) with minimal standby leakage. IC Role / Device Role / Timing Role: Low-RON (34mΩ), low-IQ (125µA) load switch with fault reporting via FLTB pin. Use Value: Reduces system power loss by >30% vs. discrete solutions and provides real-time fault diagnostics to host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar protection switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCK127BG, Toshiba | Fixed 3A current limit; no FON pin or Fast Role Swap support; 45mΩ RON; 1.2mm × 1.6mm WCSP-9 | Lacks USB PD FRS compliance and programmable current limit; suited for simpler fixed-limit USB switches | Select when FRS is unnecessary and board space allows larger package with lower integration |
| TPS22975, Texas Instruments | 3.6A rated; 29mΩ RON; supports adjustable current limit but no TRCB or FRS; 1.4mm × 1.8mm DSBGA-12 | No reverse-current blocking or USB PD timing features; higher quiescent current (25µA shutdown) | Choose for lower RON where TRCB and FRS are not required, and TI ecosystem integration is preferred |
Compared with TCK127BG and TPS22975, the AOZ1356LI-01 uniquely combines programmable current limiting, True Reverse-Current Blocking, and USB PD Fast Role Swap timing in a 1.31mm × 1.81mm WLCSP-12 package-making it the only option for space-constrained, FRS-compliant USB-C DRP implementations requiring auto-restart behavior.
Availability
AOZ1356LI-01 is available at Aetrix Electronics and suitable for USB PD power source switching, smartphone/tablet charging circuits, and notebook USB-C port protection requiring stable component supply, full lifecycle traceability, and RoHS-compliant packaging.
Supply support for AOZ1356LI-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 and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, power ICs, and advanced packaging for high-efficiency power conversion.
The AOZ1356LI product line delivers ECPower™ protection switches optimized for USB Type-C and Power Delivery systems, emphasizing fast fault response, reverse-current blocking, and compact WLCSP integration.
FAQ
What is the thermal shutdown threshold and hysteresis for AOZ1356LI-01?
The AOZ1356LI-01 triggers thermal shutdown at a junction temperature of 140°C and includes a 20°C hysteresis, meaning it automatically resumes operation when the die temperature falls to approximately 120°C. This auto-restart behavior is specific to the AOZ1356LI-01 variant and enables recovery without host intervention after transient overloads, distinguishing it from latch-off variants like AOZ1356LI-02.
How does AOZ1356LI-01 support USB PD Fast Role Swap?
The AOZ1356LI-01 supports USB PD Fast Role Swap through two synchronized mechanisms: the FON pin enables ≤100µs fast turn-on, and its True Reverse-Current Blocking (TRCB) circuit recovers in 80µs after fault removal. Together, these ensure VOUT reaches ≥4.75V within the USB PD 3.0 FRS timing budget. This capability is validated in the AOZ1356LI-01's functional block diagram and timing diagrams on pages 5–6 of the datasheet.
What is the maximum current limit setting achievable with AOZ1356LI-01?
The AOZ1356LI-01 supports a maximum current limit of 3.92A (typical) using a 4.02kΩ 1% resistor on the ILIM pin, per the equation ILIM = 14300 / RLIM (A). At this setting, the device sustains 3.5A continuous output current under thermal limits. Higher values are not supported-the datasheet specifies 3.08–3.92A as the valid range for RLIM = 4.02kΩ, confirming 3.92A as the upper bound for AOZ1356LI-01.
Does AOZ1356LI-01 provide reverse-current blocking in both enabled and disabled states?
Yes, AOZ1356LI-01 implements True Reverse-Current Blocking (TRCB) that operates regardless of EN pin state. When VOUT exceeds VIN by +25mV, the internal switch turns off within 600ns to prevent backfeed-even if EN is low. Recovery occurs when VIN exceeds VOUT by 40mV, enabling safe hot-plug and adapter swapping. This behavior is explicitly confirmed in the Functional Description section (page 12) and Figure 10 of the AOZ1356LI-01 datasheet.
What package type and dimensions does AOZ1356LI-01 use?
The AOZ1356LI-01 uses a WLCP (Wafer-Level Chip-Scale Package) with 12 solder bumps, measuring 1.31mm × 1.81mm and 0.4mm pitch. Its thermal resistance is 84°C/W, and it complies with RoHS standards. Package dimensions and tape-and-reel specifications are detailed on pages 14–15 of the official AOZ1356LI datasheet, confirming the exact footprint and assembly requirements for AOZ1356LI-01.
AOZ1356LI-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 12-UFBGA, WLCSP
- Series:
- ECPower™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- Low Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 3.4V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 34mOhm
- Input Type:
- Non-Inverting
- Features:
- Auto Restart
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Over Voltage, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WLCSP (1.81x1.31)
AOZ1356LI-01 FAQ
1.How can I place an order for AOZ1356LI-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1356LI-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 AOZ1356LI-01 reliable?
The price and inventory of AOZ1356LI-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1356LI-01 is usually 5 days.
3.What payment methods are accepted for AOZ1356LI-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1356LI-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1356LI-01?
AOZ1356LI-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1356LI-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 AOZ1356LI-01?
For technical support, including AOZ1356LI-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1356LI-01 requirements.
6.How does Aetrix verify that AOZ1356LI-01 is sourced from the original manufacturer or authorized distributors?
All AOZ1356LI-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 AOZ1356LI-01 meets industry standards.
7.What is the process for return or replacement of AOZ1356LI-01?
All AOZ1356LI-01 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1356LI-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 AOZ1356LI-01 part is unused and in its original packaging.
Return procedure for AOZ1356LI-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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