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Alpha & Omega Semiconductor Inc. AOZ1353LI-01
- Part No.:
- AOZ1353LI-01
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 12-UFBGA, WLCSP
- Datasheet:
-
AOZ1353LI-01.pdf
- Description:
- 5V/3A ECPOWER PROTECTION SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,123
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Product details
Overview
AOZ1353LI-01 from Alpha and Omega Semiconductor is a 5V/3A ECPower™ protected power switch with true reverse-current blocking (TRCB), programmable current limit (3.5A typical), 32mΩ RON, and integrated over-voltage (5.75V typ), under-voltage lockout (3.25V typ), and thermal shutdown (140°C threshold, 20°C hysteresis) protections - deployed in USB PD power source switching for smartphones and tablets.
For engineers reviewing the AOZ1353LI-01 datasheet, pinout, applications, or equivalent options, key selection considerations include its WLCSP-12 package footprint, auto-restart fault recovery behavior, TRCB trip point (20mV), adjustable soft-start via external capacitor, and 125µA quiescent current in active operation.
Technical Context
The AOZ1353LI-01 implements an integrated N-channel MOSFET power switch with charge-pump gate drive, enabling low RON (32mΩ typ) across 3.4–5.5V input range while maintaining 28V absolute maximum VOUT rating. Its TRCB circuitry actively blocks reverse current by turning off the switch when VOUT − VVIN exceeds 20mV and re-enables within <100µs after VVIN − VOUT exceeds 40mV.
Protection logic includes auto-restart thermal shutdown (140°C trip, 120°C release), over-voltage lockout (5.75V rising threshold, 250mV hysteresis), and current-limiting controlled by external resistor RLIM per ILIM = 14300/RLIM (A). Fault reporting is handled via open-drain FLTB pin, asserted low after 12ms delay during over-current events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 5.5V - supports USB PD 5V rail with margin for ripple and drop. |
| Continuous Switch Current | 3.5A - enables high-current USB Type-C power delivery paths without external FET. |
| RON (Typical) | 32mΩ at VIN = 5V, IOUT = 1A - limits conduction loss to ≤112mW at 2A load. |
| Thermal Shutdown Threshold | 140°C with 20°C hysteresis - ensures safe die temperature recovery before auto-restart. |
| TRCB Trip Point | 20mV (VOUT − VVIN) - prevents backfeed from VBUS into source during hot-plug or sink-mode transitions. |
| Quiescent Current | 125µA at VIN = 5V, EN = 5V - minimizes standby power in always-on USB port controllers. |
| OVP Rising Threshold | 5.75V (typ) - protects downstream 5V logic from overvoltage transients on USB input. |
| UVLO Rising Threshold | 3.25V (typ) - prevents erratic switching during brown-out conditions below USB spec minimum. |
Pinout & Package
AOZ1353LI-01 uses a 1.31mm × 1.81mm Wafer-Level Chip-Scale Package (WLCSP) with 12 solder bumps and RoHS-compliant Pb-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1A, 1B, 1C) | Power input supply node | Connects to 3.4–5.5V source; multiple pins reduce trace resistance and improve current handling. |
| FLTB (Pin 1D) | Open-drain fault indicator | Pulled low after 12ms during over-current or thermal fault; requires external pull-up to 5V for host MCU monitoring. |
| SS (Pin 2A) | Soft-start timing control | Capacitor CSS from SS to GND sets turn-on time (0.3–3.4ms); shorting to GND fixes at 3.4ms. |
| GND (Pins 2B, 2C) | Power and signal reference | Dual ground pins minimize voltage drop and improve thermal dissipation in compact layout. |
| ILIM (Pin 2D) | Current limit threshold setpoint | Resistor RLIM from ILIM to GND programs ILIM = 14300/RLIM (A); 1% tolerance recommended. |
| VOUT (Pins 3A, 3B, 3C) | Switched output node | Rated to 28V absolute max; connects directly to USB VBUS; supports TRCB protection in both ON/OFF states. |
| EN (Pin 3D) | Enable control input | Active-high logic (VEN_H = 1.4V min); draws only 1µA when disabled, enabling ultra-low-power system control. |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse-Current Blocking (TRCB) | Blocks VOUT→VVIN flow at 20mV differential and recovers in <100µs - essential for USB dual-role port safety. |
| Programmable Current Limit | Set from 0.5A to 3.92A using single external resistor - enables precise overcurrent protection tuning per load profile. |
| Adjustable Soft-Start | Turn-on time configurable from 0.3ms to 3.4ms via CSS capacitor - prevents inrush into large VBUS capacitance (e.g., 100µF). |
| Auto-Restart Fault Recovery | Resumes operation 24ms after OVP or thermal fault removal - maintains USB port availability without host intervention. |
| Low Quiescent Current | 125µA active / 6µA shutdown - extends battery life in portable devices during sleep or suspend modes. |
| Integrated Protection Suite | Combines UVLO, OVP, TRCB, current limit, and thermal shutdown in one WLCSP-12 device - eliminates discrete protection ICs and saves PCB area. |
Applications
| USB PD Power Source Switch | Smartphone/Tablet Power Management |
|---|---|
Use Scenario: Controlling 5V power delivery to USB Type-C ports in laptop docking stations or multi-port chargers. IC Role / Device Role / Timing Role: Primary power switch with real-time current limiting and reverse-current blocking to prevent VBUS backfeed during role swaps. Use Value: Enables compliant USB PD 3.0 source implementation with single-chip protection, eliminating need for external OVP/TRCB diodes or controllers. |
Use Scenario: Managing power path between battery charger and system rail in smartphones with USB OTG or accessory charging capability. IC Role / Device Role / Timing Role: High-side load switch isolating VBUS from PMIC during cable insertion/removal and enforcing strict current limits. Use Value: Prevents battery discharge through VBUS during accessory disconnect and avoids thermal runaway during short-circuit events on USB ports. |
| Notebook/Ultrabook Port Protection | Portable Device Hot-Swap Control |
Use Scenario: Securing USB-C ports against overvoltage transients and reverse current in thin-and-light notebooks with shared VBUS routing. IC Role / Device Role / Timing Role: Fault-tolerant power switch with 5.75V OVP and 140°C thermal shutdown - responds within 2µs to overvoltage and 12ms to overcurrent. Use Value: Guarantees port survivability during accidental 12V adapter misconnection or ESD-induced VBUS spikes without system reset. |
Use Scenario: Enabling hot-plug detection and safe power sequencing for external peripherals in ruggedized handhelds and medical monitors. IC Role / Device Role / Timing Role: Load switch with programmable ILIM and FLTB fault flag - provides deterministic response to sudden load shorts or cable faults. Use Value: Allows host MCU to log fault events (via FLTB) and initiate graceful shutdown or retry, improving field reliability and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar protected power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCK127BG, Toshiba | Fixed 3A current limit; no TRCB; 45mΩ RON; SOT-23-6 package | Lacks reverse-current blocking and programmable current limit - unsuitable for USB dual-role or precision current-limited designs. | Select only if TRCB and adjustable ILIM are not required and board space allows larger SOT-23 footprint. |
| TPS22975, Texas Instruments | 3.6A rated; 29mΩ RON; no OVP; no TRCB; 1.2mm × 1.6mm DSBGA-8 | Missing over-voltage and true reverse-current protection - requires external TVS and diode for full USB PD compliance. | Choose when lowest RON is critical and system-level OVP/TRCB are implemented elsewhere. |
Compared with TCK127BG and TPS22975, AOZ1353LI-01 uniquely integrates TRCB, programmable current limit, OVP, and auto-restart thermal shutdown in a 1.31mm × 1.81mm WLCSP - delivering full USB PD 5V source protection with minimal BOM count and zero external components for core protections.
Availability
AOZ1353LI-01 is available at Aetrix Electronics and suitable for USB PD power source switches, smartphone/tablet power management, notebook port protection, portable device hot-swap control, and industrial USB-C interface modules requiring stable component supply and long-term lifecycle support.
Supply support for AOZ1353LI-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 high-efficiency MOSFETs, power ICs, and advanced packaging technologies for power conversion and protection.
The AOZ1353LI product line delivers ECPower™-branded protected power switches targeting USB PD, mobile, and computing applications where space-constrained, highly integrated, and fault-resilient 5V power routing is required.
FAQ
What is the thermal shutdown behavior of AOZ1353LI-01?
The AOZ1353LI-01 activates thermal shutdown at 140°C junction temperature with 20°C hysteresis, meaning it resumes operation only after die temperature falls below approximately 120°C. This auto-restart behavior is specific to the -01 and -03 variants and ensures continuous port availability without manual reset. The AOZ1353LI-01's thermal protection is fully integrated and does not require external sensors or control logic.
How is current limit programmed on AOZ1353LI-01?
Current limit on AOZ1353LI-01 is set by connecting an external resistor RLIM between the ILIM pin and GND, using the formula ILIM = 14300 / RLIM (A). For example, a 14.3kΩ resistor yields ~1A limit; a 4.02kΩ resistor gives ~3.5A. A 1% tolerance resistor is recommended to maintain accuracy across temperature, and the AOZ1353LI-01 applies this limit continuously during overload conditions.
Does AOZ1353LI-01 support true reverse-current blocking in both ON and OFF states?
Yes, AOZ1353LI-01 provides True Reverse-Current Blocking (TRCB) in both enabled and disabled states. It blocks current flow from VOUT to VIN whenever VOUT exceeds VIN by 20mV, and recovers automatically within <100µs once VIN exceeds VOUT by 40mV. This behavior is intrinsic to the AOZ1353LI-01's internal architecture and requires no external components or configuration.
What is the function of the FLTB pin on AOZ1353LI-01?
The FLTB pin on AOZ1353LI-01 is an open-drain fault indicator that pulls low after a 12ms delay during over-current or thermal shutdown events. It remains low until the fault condition clears, then returns to high-impedance state - requiring an external pull-up resistor to generate a logic-high signal for host MCU monitoring. FLTB does not report UVLO, OVP, or TRCB events.
Can AOZ1353LI-01 be used in USB Type-C dual-role (DRP) applications?
Yes, AOZ1353LI-01 is explicitly designed for USB Type-C dual-role port applications due to its True Reverse-Current Blocking (TRCB), which prevents backfeed during role swaps, and its 28V VOUT rating compatible with USB PD voltage negotiation. Its fast TRCB recovery (<100µs) and auto-restart behavior ensure seamless transitions between source and sink modes without host firmware intervention.
AOZ1353LI-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 12-UFBGA, WLCSP
- 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 ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 32mOhm
- 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-WLCSP (1.81x1.31)
AOZ1353LI-01 FAQ
1.How can I place an order for AOZ1353LI-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1353LI-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 AOZ1353LI-01 reliable?
The price and inventory of AOZ1353LI-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1353LI-01 is usually 5 days.
3.What payment methods are accepted for AOZ1353LI-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1353LI-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1353LI-01?
AOZ1353LI-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1353LI-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 AOZ1353LI-01?
For technical support, including AOZ1353LI-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1353LI-01 requirements.
6.How does Aetrix verify that AOZ1353LI-01 is sourced from the original manufacturer or authorized distributors?
All AOZ1353LI-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 AOZ1353LI-01 meets industry standards.
7.What is the process for return or replacement of AOZ1353LI-01?
All AOZ1353LI-01 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1353LI-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 AOZ1353LI-01 part is unused and in its original packaging.
Return procedure for AOZ1353LI-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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