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Alpha & Omega Semiconductor Inc. AOZ1358LI-01
- Part No.:
- AOZ1358LI-01
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
AOZ1358LI-01.pdf
- Description:
- IC PWR SMART SWITCH 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,934
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Product details
Overview
AOZ1358LI-01 from Alpha and Omega Semiconductor is a USB Type-C PD current-sourcing protection switch with programmable current limit (3.3 A typical), 34 mΩ RON, 29 V absolute maximum VOUT rating, and integrated Ideal Diode Reverse-Current Blocking (IDRCB). It operates from 3.8 V to 5.5 V input and supports Fast Role Swap for seamless power direction reversal in notebook and portable USB PD systems.
For engineers reviewing the AOZ1358LI-01 datasheet, pinout, applications, or equivalent options, key selection considerations include FRS timing compliance (<100 µs turn-on), ±8 kV IEC 61000-4-2 ESD on VOUT, thermal shutdown at 140 °C, and external RLIM-based current threshold setting.
Technical Context
The AOZ1358LI-01 integrates dual back-to-back power MOSFETs controlled by an ideal diode gate loop and fast comparator for reverse-current blocking, with VT_FRCB = 25 mV trip point and tFRCB = 0.5 µs response. Its charge pump drives the high-side MOSFET gate via VCP pins, enabling low RON while supporting 29 V VOUT transient tolerance.
Control logic enforces strict sequencing: EN must exceed 1.2 V and VIN > 3.6 V (UVLO) before turn-on; FON must be held high ≥50 µs before EN and ≥50 µs after EN to enable Fast Role Swap mode, achieving tFON = 60–100 µs with COUT = 1 µF and ROUT = 100 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8 V to 5.5 V - matches standard USB PD 5 V rail; UVLO ensures no operation below 3.6 V rising threshold. |
| RON | 34 mΩ typical at 1 A - enables <170 mW conduction loss at 3.3 A, critical for thermally constrained WLCSP packages. |
| VOUT Absolute Max | 29 V - protects against 20 µs/1 ms transient surges up to 34 V, satisfying USB PD high-voltage source requirements. |
| Current Limit Accuracy | ±6% at 3.3 A (RLIM = 14.3 kΩ) - ensures precise overcurrent protection without derating for system-level fault margin. |
| FRS Turn-On Time | 60–100 µs - meets USB PD specification for sub-150 µs power swap, enabled only when FON is asserted before EN. |
| IDRCB Recovery | 50 µs (tRCB_OFF) - minimizes VOUT droop during power swap by rapidly re-enabling forward conduction after VOUT < VIN. |
| ESD Rating (VOUT) | ±8 kV IEC 61000-4-2 - eliminates need for external TVS diodes on VBUS line in end-equipment designs. |
Pinout & Package
AOZ1358LI-01 uses a 2.01 mm × 2.05 mm WLCSP-16 package with 0.5 mm pitch and 16 solder bumps. Thermal resistance is 58 °C/W; exposed die pad is not present-thermal management relies on PCB copper area under bump array.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A1, A2) | Supply input | Connects to upstream 5 V regulator output; supplies internal bias and charge pump; must be decoupled with ≥1 µF ceramic capacitor. |
| VOUT (C2, D1, D2) | Power output | Direct connection to USB VBUS; rated for 29 V abs max and ±8 kV IEC 61000-4-2 ESD; handles full load current. |
| GND (B3, C3, D3) | Ground reference | Low-impedance return path for all internal circuits; requires solid PCB ground plane beneath package for thermal and noise control. |
| EN (B4) | Enable control | Active-high logic input (VEN_H = 1.2 V); internally pulled down; controls main switch activation and soft-start initiation. |
| FON (C4) | Fast turn-on control | Active-high logic input (VFON_H = 1.2 V); must be asserted ≥50 µs before EN to enable FRS mode; internally pulled down. |
| ILIM (A3) | Current limit set | Analog input referenced to GND; sets ILIM via external 1% resistor (e.g., 14.3 kΩ → 3.3 A); determines OCP threshold and foldback behavior. |
| FLTB (A4) | Fault flag output | Open-drain indicator; pulled low on OCP (after 4 ms blanking) or thermal shutdown; requires external pull-up for host MCU monitoring. |
| CAP (D4) | Charge pump boost | Connects external capacitor to GND; stores energy for gate drive during fast turn-on and RCB recovery; enables 50 µs tRCB_OFF. |
| VCP (B1, B2, C1) | Charge pump center | Internal node between back-to-back MOSFET sources; must remain floating-no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| USB PD Fast Role Swap Support | Enables <100 µs VBUS sourcing transition when FON and EN are sequenced per spec-critical for uninterrupted power during PD contract renegotiation. |
| Ideal Diode Reverse-Current Blocking | Prevents reverse current flow from VOUT to VIN at all times (enabled/disabled states) with 25 mV trip point and 0.5 µs detection-ensures USB PD compliance and protects upstream supply. |
| Programmable Current Limit | External RLIM resistor sets precise OCP threshold (e.g., 550 mA to 3.53 A); includes 150 µs 2× current surge allowance for hot-plug transients. |
| Integrated Surge Protection | Withstands ±80 V IEC 61000-4-5 surge on VOUT-eliminates need for discrete TVS in many portable applications. |
| Thermal Shutdown with Hysteresis | Shuts off MOSFET at 140 °C junction temperature and auto-restarts after 20 °C cooldown-prevents permanent damage during sustained overload. |
Applications
| USB PD Power Source Switch | Notebook / Ultrabook Power Path |
|---|---|
Use Scenario: Managing VBUS power delivery from a laptop's internal 5 V rail to a USB-C port during PD contract negotiation and role swaps. IC Role / Device Role / Timing Role: Primary current-limiting, reverse-blocking, and FRS-enabled power switch controlling VBUS sourcing capability. Use Value: Enables compliant sub-150 µs power swap without external circuitry, reducing BOM count and ensuring zero-power-interruption user experience. | Use Scenario: Protecting the 5 V system rail in thin-and-light notebooks against reverse current from connected peripherals or docking stations. IC Role / Device Role / Timing Role: High-reliability protection switch with 29 V VOUT rating and ±8 kV ESD immunity on VBUS line. Use Value: Eliminates need for discrete TVS and ideal diode controllers, saving board space and improving robustness against hot-plug and ESD events. |
| Tablet / Portable Device VBUS Control | Desktop Docking Station PD Interface |
Use Scenario: Controlling power delivery to USB-C accessories in battery-powered tablets where thermal headroom is limited. IC Role / Device Role / Timing Role: Low-RON (34 mΩ), thermally optimized WLCSP switch with programmable current limit and soft-start. Use Value: Limits inrush into large VBUS capacitors and maintains <170 mW conduction loss at 3.3 A-enabling use in fanless, compact enclosures. | Use Scenario: Implementing bidirectional VBUS control in desktop docking stations supporting both sink and source roles. IC Role / Device Role / Timing Role: Dual-role PD switch with IDRCB, FRS, and 29 V VOUT rating to handle legacy 20 V PD contracts. Use Value: Supports full USB PD 3.1 specification including extended power range (EPR) preparation via robust 34 V transient tolerance and fast recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB PD current-sourcing protection switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB544RTER | Single-channel USB 3.1 Gen 2 re-driver with integrated PD switch; lacks programmable current limit and IDRCB; RON = 60 mΩ. | Targeted at signal integrity enhancement, not primary power switching; no FRS or surge protection. | Select AOZ1358LI-01 for dedicated, high-efficiency VBUS power control with full PD compliance features. |
| TPS65987D | USB PD controller with integrated 3.3 V LDO and 5 V buck; includes basic power switch but no programmable OCP, no 29 V VOUT rating, no ±8 kV ESD. | System-level PD controller solution; requires external discrete switch for high-current paths. | Choose AOZ1358LI-01 when a standalone, high-reliability protection switch with certified surge/ESD performance is required. |
Compared with TUSB544RTER and TPS65987D, AOZ1358LI-01 delivers dedicated, high-fidelity VBUS switching with industry-leading 29 V VOUT rating, ±8 kV ESD, and hardware-enforced FRS timing-making it optimal for space-constrained, thermally sensitive USB PD source implementations where reliability and compliance are non-negotiable.
Availability
AOZ1358LI-01 is available at Aetrix Electronics and suitable for USB PD power source switches, notebook/ultrabook power path management, and tablet/portable device VBUS control requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AOZ1358LI-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-performance MOSFETs, power ICs, and advanced packaging for efficiency-critical applications.
The AOZ1358LI-01 belongs to AOS's ECPower™ family of smart protection switches, designed specifically for USB Type-C PD power delivery systems requiring fast role swap, reverse-current blocking, and robust surge/ESD immunity.
FAQ
What is the absolute maximum voltage rating on the VOUT pin of the AOZ1358LI-01?
The AOZ1358LI-01 has a 29 V absolute maximum rating on the VOUT pin, with transient tolerance up to 34 V for 20 µs pulses at 1 ms period. This rating enables safe operation in USB PD applications involving higher-voltage contracts and surge events, eliminating the need for external clamping components in most designs.
How does the AOZ1358LI-01 implement Fast Role Swap (FRS) and what timing constraints apply?
The AOZ1358LI-01 implements FRS by requiring FON to be driven high ≥50 µs before EN (tS_FON) and held high ≥50 µs after EN (tH_FON). When properly sequenced, AOZ1358LI-01 achieves tFON = 60–100 µs, meeting USB PD's <150 µs requirement. If FON and EN are tied together, FRS completes in 150 µs due to internal setup delay.
What is the purpose of the VCP pins on the AOZ1358LI-01 and how should they be connected?
The VCP pins (B1, B2, C1) on the AOZ1358LI-01 are the central node of the internal back-to-back MOSFET pair and must remain unconnected-left floating per datasheet. They serve as the charge pump coupling point for gate drive and are not intended for external circuitry; any connection risks malfunction or damage.
Can the AOZ1358LI-01 be used in applications requiring reverse-current blocking during both enabled and disabled states?
Yes, the AOZ1358LI-01 provides Ideal Diode Reverse-Current Blocking (IDRCB) in both enabled and disabled states. It prevents reverse current flow from VOUT to VIN whenever VOUT > VIN, complying fully with USB PD specifications and protecting upstream supplies from backfeed during hot-plug or power-swap scenarios.
What external components are required for basic operation of the AOZ1358LI-01?
Basic operation of the AOZ1358LI-01 requires: (1) RLIM resistor from ILIM to GND to set current limit; (2) RFLTB pull-up resistor on FLTB for fault reporting; (3) capacitor from CAP to GND for charge pump boost; (4) ≥1 µF ceramic CIN at VIN; and (5) appropriate COUT at VOUT. No external gate resistors or bootstrap diodes are needed.
AOZ1358LI-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 16-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:
- 0V ~ 23V
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 34mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (2.05x2.01)
AOZ1358LI-01 FAQ
1.How can I place an order for AOZ1358LI-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1358LI-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 AOZ1358LI-01 reliable?
The price and inventory of AOZ1358LI-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1358LI-01 is usually 5 days.
3.What payment methods are accepted for AOZ1358LI-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1358LI-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1358LI-01?
AOZ1358LI-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1358LI-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 AOZ1358LI-01?
For technical support, including AOZ1358LI-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1358LI-01 requirements.
6.How does Aetrix verify that AOZ1358LI-01 is sourced from the original manufacturer or authorized distributors?
All AOZ1358LI-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 AOZ1358LI-01 meets industry standards.
7.What is the process for return or replacement of AOZ1358LI-01?
All AOZ1358LI-01 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1358LI-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 AOZ1358LI-01 part is unused and in its original packaging.
Return procedure for AOZ1358LI-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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