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Alpha & Omega Semiconductor Inc. AOZ15333DI-02
- Part No.:
- AOZ15333DI-02
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
AOZ15333DI-02.pdf
- Description:
- 5V/3.5A SOURCE SWITCH LATCH-OFF
- Quantity:
- Payment:
- Shipping:
Inventory:5,015
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Product details
Overview
AOZ15333DI-02 from Alpha and Omega Semiconductor is a latch-off mode current-limited load switch for USB PD Fast Role Swap applications, featuring 3.3–5.5 V input operation, 39 V VOUT absolute rating, 45 mΩ typical RON, programmable 1.0–4.4 A current limit via external resistor, and True Reverse-Current Blocking (TRCB) with 25 mV trip point. It delivers fast turn-on (<100 µs with FON) and 6 µA shutdown current for portable power source switching.
For engineers reviewing the AOZ15333DI-02 datasheet, pinout, applications, or equivalent options, key selection considerations include fault recovery behavior (latch-off vs. auto-restart), TRCB response time (1.2 µs), FRS timing compliance, OVP threshold (5.6–6.0 V), and thermal shutdown at 140 °C - all critical for USB-C power path design in smartphones, notebooks, and PD-compliant accessories.
Technical Context
The AOZ15333DI-02 integrates a low-RON N-channel MOSFET power switch with independent control logic for UVLO (3.1 V typ), OVP (5.8 V typ), TRCB (25 mV trip), and thermal shutdown (140 °C). Its latch-off fault response requires explicit EN pin toggle to clear FLTB and re-enable, distinguishing it from the auto-restart AOZ15333DI-01 variant.
Programmable over-current protection uses an external 1% resistor on ILIM to set thresholds from 1.0 A to 4.4 A; foldback reduces regulated current by 8% during sustained overload. Fast Role Swap support is enabled by FON pin assertion, reducing turn-on time to 50–100 µs and enabling VOUT recovery to >4.75 V within USB PD spec limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3 V to 5.5 V - supports standard USB PD 5 V rail with 300 mV UVLO hysteresis. |
| VOUT Absolute Max Rating | +39 V - enables robust reverse-voltage tolerance during hot-plug or adapter transients. |
| RON (Typical) | 45 mΩ at 1 A - limits conduction loss to <225 mW at 3.5 A, easing thermal design in DFN-12L package. |
| Current Limit Range | 1.0–4.4 A via RLIM - selectable with 1% resistors (e.g., 14.3 kΩ for 1.0 A; 4.02 kΩ for 3.5 A). |
| Fault Response Mode | Latch-off - device remains disabled after OVP/OCP/SCP/OTP; requires EN toggle or supply recycle. |
| TRCB Trip Point | 25 mV (VOUT – VIN) - blocks reverse current before significant energy transfer occurs. |
| Fast Turn-on Time | 50–100 µs (FON = 5 V) - meets USB PD Fast Role Swap timing for sub-100 µs VOUT rise to 4.75 V. |
Pinout & Package
AOZ15333DI-02 is housed in a RoHS-compliant DFN3x3-12L package (3.0 mm × 3.0 mm, 0.9 mm height) with exposed thermal pad (EXP) tied to GND. Pin 1–3 (VOUT) and 10–12 (VIN) are internally paralleled for high-current routing; Pin 4 is NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pins 1,2,3) | Power output terminal | Delivers switched 5 V to USB-C VBUS; rated 39 V abs max; connects to adaptor or downstream port. |
| NC (Pin 4) | No-connect terminal | Unbonded pad; must be left floating or grounded per layout guidelines - no electrical function. |
| FLTB (Pin 5) | Open-drain fault indicator | Pulled low during OCP/SCP/OTP; high-impedance otherwise; requires external 5 V pull-up (RFLTB). |
| FON (Pin 6) | Fast-On enable control | Active-high signal (1.4 V min); must be asserted before EN to activate FRS mode and reduce tFON. |
| GND (Pin 7) | Power ground reference | Primary return path for switch current and internal logic; connects to EXP for thermal management. |
| ILIM (Pin 8) | Current limit programming | Sets OCP threshold via 1% resistor to GND; supports 1.0–4.4 A range with ±10% accuracy. |
| EN (Pin 9) | Enable input | Active-high logic control (1.4 V min); toggle required to clear latch-off state and restart after fault. |
| VIN (Pins 10,11,12) | Supply input | 3.3–5.5 V input rail; powers internal regulator and gate driver; paralleled pins reduce IR drop. |
| EXP | Exposed thermal pad | Internally connected to GND; must be soldered to large PCB copper area for RTH(J-A) ≈ 50 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse-Current Blocking (TRCB) | Blocks VOUT→VIN flow at 25 mV differential; recovers in 60 µs - prevents backfeed during role swap or cable disconnect. |
| USB PD Fast Role Swap (FRS) Support | Enables <100 µs VOUT rise to 4.75 V when FON is asserted - satisfies USB PD Rev 3.0 timing for provider-to-consumer transition. |
| Latch-off Fault Recovery | Stops automatic retries after OVP/OCP/SCP/OTP; requires explicit EN toggle - eliminates uncontrolled cycling in persistent fault conditions. |
| Programmable Current Limit | Adjustable 1.0–4.4 A threshold via single 1% resistor (RLIM) - simplifies BOM while supporting diverse load profiles. |
| Low Quiescent & Shutdown Current | 125 µA operating / <6 µA shutdown - extends battery life in always-on USB-C power switches for portable devices. |
Applications
| USB PD Power Source Switch | Smartphone & Tablet Charging Circuit |
|---|---|
Use Scenario: Managing VBUS power delivery in dual-role USB-C ports that switch between sink and source modes. IC Role / Device Role / Timing Role: Load switch controlling 5 V rail integrity, enforcing TRCB during role reversal, and executing FRS within <100 µs. Use Value: Enables compliant USB PD 3.0 Fast Role Swap without external controllers; latch-off prevents unsafe retry loops during short-circuit faults. |
Use Scenario: Isolating battery-powered 5 V rails from USB-C connectors during charging or data transfer. IC Role / Device Role / Timing Role: High-side power switch with OVP/UVLO/TRCB - protects system from adapter overvoltage, reverse current, and inrush. Use Value: 45 mΩ RON minimizes voltage drop across VBUS path; 6 µA shutdown current preserves standby battery life. |
| Notebook & Ultrabook Port Controller | Portable Device Power Path Manager |
Use Scenario: Enabling dynamic power routing in thin-and-light laptops with multiple USB-C ports sharing a single PD controller. IC Role / Device Role / Timing Role: Independent load switch per port, responding to host commands via EN/FON to manage VBUS sequencing and fault isolation. Use Value: FLTB pin provides per-port fault reporting to EC; latch-off behavior ensures firmware intervention before re-enabling after thermal shutdown. |
Use Scenario: Protecting compact battery packs and PMICs from reverse current, overvoltage, and short circuits in handheld instruments or wearables. IC Role / Device Role / Timing Role: Primary power switch with integrated protections - replaces discrete MOSFET + protection IC combinations. Use Value: 39 V VOUT rating handles transient surges up to ±15 kV air discharge (IEC61000-4-2); DFN3x3-12L footprint saves board space vs. SOIC alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS22975 | Auto-restart fault recovery; 5.5 V max input; 3.6 A rating; no TRCB or FRS support. | Designed for general-purpose hot-swap, not USB PD role swap; lacks reverse-current blocking and fast-turn-on timing. | Select if latch-off behavior is unnecessary and TRCB/FRS are not required. |
| ON Semi NIS5130MNTBG | 36 V VOUT rating; 3.3–5.5 V input; 4.5 A rating; latch-off mode; no FRS or TRCB. | Focuses on overvoltage/overcurrent protection only; no USB PD timing features or true reverse-blocking capability. | Choose when USB PD compliance is not needed but higher current rating and latch-off are critical. |
Compared with AOZ15333DI-02, the TPS22975 offers simpler auto-restart behavior but omits TRCB and FRS - making it unsuitable for USB-C dual-role systems. The NIS5130MNTBG provides higher current capacity and latch-off, yet lacks both TRCB and FRS, requiring external circuitry for reverse-current management and role-swap timing compliance.
Availability
AOZ15333DI-02 is available at Aetrix Electronics and suitable for USB PD power source switching, smartphone/tablet charging circuits, and notebook port controller designs requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for AOZ15333DI-02 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, IGBTs, and power management ICs for computing, consumer, and industrial markets.
The AOZ15333DI product line delivers ECPower™-branded load switches optimized for USB Type-C power delivery systems, emphasizing fast role swap timing, robust fault protection, and compact DFN packaging for space-constrained portable electronics.
FAQ
What fault conditions cause AOZ15333DI-02 to latch off, and how is it reset?
AOZ15333DI-02 latches off upon over-voltage (OVP), over-current (OCP), short-circuit (SCP), or over-temperature (OTP) events. Unlike the auto-restart -01 variant, it remains disabled until the EN pin is toggled high-low-high or the input supply is cycled. This behavior prevents uncontrolled retries during persistent faults and ensures firmware-level acknowledgment before re-enabling the power path.
How does AOZ15333DI-02 support USB PD Fast Role Swap (FRS)?
AOZ15333DI-02 supports USB PD FRS through its FON pin: when FON is driven high before EN activation, the device achieves fast turn-on time of 50–100 µs and recovers VOUT to >4.75 V within specification limits. This enables compliant role transitions from sink to source in dual-role USB-C ports without external timing circuitry.
What is the purpose of the FLTB pin on AOZ15333DI-02, and how should it be interfaced?
The FLTB pin on AOZ15333DI-02 is an open-drain fault indicator pulled low during OCP, SCP, or OTP events. It remains high-impedance during normal operation and UVLO/OVP/TRCB events. A 5 V pull-up resistor (RFLTB) must be connected externally to generate a logic-compatible fault signal for host microcontroller monitoring and system-level fault handling.
Can AOZ15333DI-02 block reverse current when disabled, and what is its TRCB trip point?
Yes, AOZ15333DI-02 provides True Reverse-Current Blocking (TRCB) in both enabled and disabled states. It trips at VOUT – VIN ≥ 25 mV and releases when VIN – VOUT ≥ 40 mV, with 1.2 µs response time and 60 µs fast recovery. This prevents backfeed from VBUS into the source rail during cable disconnect or role reversal - a critical requirement for USB PD compliance.
How is current limit programmed on AOZ15333DI-02, and what resistor values correspond to common thresholds?
Current limit on AOZ15333DI-02 is set by a 1% resistor (RLIM) from ILIM pin to GND. For 3.5 A, use 4.02 kΩ; for 2.0 A, use 7.15 kΩ; for 1.0 A, use 14.3 kΩ. The relationship is approximately ILIM = 14300 / RLIM (in kΩ), with table-based values recommended below 2.5 A due to nonlinearity. RLIM must be placed close to the IC on the top PCB layer.
AOZ15333DI-02 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:
- 3.3V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 3.5A
- Rds On (Typ):
- 45mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, Slew Rate Controlled, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Over Voltage, Reverse Current, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x3)
AOZ15333DI-02 FAQ
1.How can I place an order for AOZ15333DI-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ15333DI-02 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 AOZ15333DI-02 reliable?
The price and inventory of AOZ15333DI-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ15333DI-02 is usually 5 days.
3.What payment methods are accepted for AOZ15333DI-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ15333DI-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ15333DI-02?
AOZ15333DI-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ15333DI-02 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 AOZ15333DI-02?
For technical support, including AOZ15333DI-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ15333DI-02 requirements.
6.How does Aetrix verify that AOZ15333DI-02 is sourced from the original manufacturer or authorized distributors?
All AOZ15333DI-02 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 AOZ15333DI-02 meets industry standards.
7.What is the process for return or replacement of AOZ15333DI-02?
All AOZ15333DI-02 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ15333DI-02, 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 AOZ15333DI-02 part is unused and in its original packaging.
Return procedure for AOZ15333DI-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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