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Alpha & Omega Semiconductor Inc. AOZ1361DI-02
- Part No.:
- AOZ1361DI-02
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
AOZ1361DI-02.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AOZ1361DI-02 from Alpha & Omega Semiconductor is a latch-off version P-channel high-side load switch for circuit protection in hot-swap and notebook PC power rails. It operates from 4.5V to 28V input, supports 3A continuous current, features programmable current limiting via external resistor, thermal shutdown at 130°C with latch behavior, and open-drain fault indication with 600µs delay.
For engineers reviewing the AOZ1361DI-02 datasheet, pinout, applications, or equivalent options, this device is selected for robust over-current and thermal fault handling where automatic restart is undesirable-e.g., systems requiring manual intervention after fault latching, stable rail sequencing, or safety-critical power enable control.
Technical Context
The AOZ1361DI-02 implements a latch-off response to over-current and thermal faults: once triggered, the internal MOSFET remains off until EN is toggled or VIN is cycled, and die temperature falls below 100°C. Its soft-start slew rate is set by an external capacitor on SS pin, and current limit threshold is determined by resistor value on SET pin (e.g., 74.5kΩ sets 2.7A typical).
Functional block integration includes UVLO (4.4V rising threshold), gate driver with slew control, current-sense amplifier, thermal sensor with 30°C hysteresis, and fault delay timer controlled by TFLT capacitor. The FLTB output is open-drain with 100Ω on-resistance and requires external 5V pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide industrial and computing rail voltages including +5V, +12V, and +24V systems. |
| Continuous Current Rating | 3A - maximum sustained load current before thermal or current-limit activation under proper PCB layout and ambient conditions. |
| RDS(ON) | 22–35 mΩ @ 12V - low conduction loss enabling <100mW dissipation at 2A, reducing heatsinking needs. |
| Fault Response Mode | Latch-off - disables output permanently until EN toggle or VIN cycle; prevents uncontrolled re-engagement during persistent fault. |
| Thermal Shutdown Threshold | 130°C with 30°C hysteresis - protects die from irreversible damage; recovery requires junction cooling to ≤100°C. |
| Quiescent Current | 220 µA typical - minimizes standby power draw in always-on subsystems; drops to <1 µA in shutdown. |
| ESD Rating | 2.5 kV HBM - sufficient for handling in standard manufacturing environments without special ESD controls. |
Pinout & Package
AOZ1361DI-02 is housed in a RoHS-compliant, lead-free 10-pin DFN package (4 mm × 4 mm, 0.75 mm height) with exposed thermal pad. The package supports high-power dissipation (θJA = 63°C/W) and is optimized for compact, thermally demanding applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - IN | P-channel MOSFET source | Connects to input supply rail; requires 1 µF ceramic bypass capacitor to GND for stability and transient suppression. |
| 3 - FLTB | Open-drain fault indicator | Pulls low during over-current, short-circuit, or thermal fault; requires external 5V pull-up resistor (e.g., 100 kΩ) for logic-level signaling. |
| 4 - GND | Power and signal reference | Common return path for all internal circuits; must be connected to low-impedance system ground plane. |
| 5 - SS | Soft-start timing control | Capacitor-to-GND sets linear output voltage ramp time; 1 nF yields ~360 µs rise (VIN=12V), preventing inrush into capacitive loads. |
| 6 - EN | Active-high enable input | Logic-compatible control (2.0V min high, 0.8V max low); only active when VIN > UVLO threshold (~4.4V). |
| 7 - SET | Current limit programming | Resistor-to-GND sets trip point (e.g., 74.5 kΩ → 2.7A typical); enables precise over-current protection matching load requirements. |
| 8 - TFLT | Fault delay timing | Capacitor-to-GND sets 600 µs minimum fault assertion delay (CTLT = 1 nF), rejecting transient spikes. |
| 9, 10 - OUT | P-channel MOSFET drain | Delivers switched output to load; requires 0.1 µF ceramic capacitor to GND for high-frequency noise filtering and local energy storage. |
Key Features
| Feature | Design Value |
|---|---|
| Latch-off fault response | Ensures safe, persistent disablement during over-current or thermal events-eliminates risk of repeated cycling that could damage downstream components or cause system instability. |
| Programmable current limit | Enables precise match to load requirements using a single external resistor, avoiding overdesign while maintaining margin against worst-case inrush and steady-state currents. |
| Adjustable soft-start slew rate | Prevents voltage droop and supply rail collapse during hot-plug events by controlling dV/dt at OUT, critical for USB-C PD, PCIe add-in cards, and modular backplanes. |
| Integrated thermal shutdown with hysteresis | 130°C trip + 30°C hysteresis ensures reliable recovery only after die cools sufficiently, preventing premature reactivation in thermally constrained enclosures. |
| Low quiescent current & shutdown leakage | 220 µA operating / <1 µA shutdown current extends battery life in portable systems and reduces standby power in always-on embedded controllers. |
Applications
| Notebook PC Power Rails | Hot-Swap Server Modules |
|---|---|
Use Scenario: Isolating +12V or +5V auxiliary rails powering USB hubs, SSDs, or discrete GPU modules during live insertion/removal. IC Role / Device Role / Timing Role: High-side load switch with latch-off fault response ensuring rail disconnect persists until operator-initiated reset after over-current detection. Use Value: Prevents bus contention, data corruption, or motherboard damage during mis-seated connectors by eliminating auto-restart behavior during persistent shorts. |
Use Scenario: Enabling individual blade power in telecom or enterprise servers where module replacement must not disrupt adjacent slots. IC Role / Device Role / Timing Role: Controlled power delivery with programmable current limit (e.g., 2.5A) and thermal latching to enforce manual verification before re-enabling a failed slot. Use Value: Enables deterministic fault containment-system management controller receives FLTB assertion and logs event, but does not auto-retry without host confirmation. |
| Industrial Control I/O Cards | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Protecting field-wiring outputs (e.g., 24V solenoid drivers) against accidental short-to-ground during maintenance. IC Role / Device Role / Timing Role: Latch-off high-side switch with 600 µs fault delay to ignore ESD transients while reliably asserting FLTB for true over-current events. Use Value: Eliminates nuisance trips in electrically noisy factory floors; maintenance staff must power-cycle or toggle EN to restore operation-ensuring physical inspection precedes re-energization. |
Use Scenario: Sequencing power to imaging sensor arrays and analog front-ends where uncontrolled re-engagement could corrupt calibration or violate safety interlocks. IC Role / Device Role / Timing Role: Fault-latched enable gate for +15V bias rails, with FLTB tied to FPGA monitoring logic to halt sequence on first fault occurrence. Use Value: Guarantees single-point failure isolation-no automatic retry compromises diagnostic integrity or violates IEC 62304 software safety requirements for Class C devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS22965DSGR | Latch-off mode supported; lower RDS(ON) (19 mΩ), narrower input range (1.6–5.7V), no programmable current limit. | Optimized for low-voltage logic rails (e.g., 3.3V FPGA I/O), not 12V/24V industrial loads. | Select when operating below 6V and fixed 2.5A limit suffices; avoid for AOZ1361DI-02's 4.5–28V range or adjustable ILIM. |
| RTQ2132GSP | Auto-restart fault mode only; higher RDS(ON) (45 mΩ), same 4.5–28V range and programmable ILIM via SET pin. | Requires external logic to manage repeated fault cycles-unsuitable where persistent disablement is mandatory. | Use only if system firmware handles fault recovery; AOZ1361DI-02 preferred where hardware-enforced latch is required. |
Compared with TPS22965DSGR and RTQ2132GSP, AOZ1361DI-02 uniquely combines wide-input operation, adjustable current limiting, and hardware-latched fault response-making it the sole choice when fail-safe disablement without software intervention is mandated.
Availability
AOZ1361DI-02 is available at Aetrix Electronics and suitable for notebook PC power management, hot-swap server modules, and industrial I/O card protection requiring stable component supply across extended product lifecycles.
Supply support for AOZ1361DI-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 & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, load switches, and power ICs for computing, consumer, and industrial markets.
The AOZ1361DI family was designed specifically for robust, programmable high-side power switching in space-constrained, thermally demanding applications-emphasizing fault resilience, low quiescent power, and seamless integration with microcontroller-based power management.
FAQ
What distinguishes AOZ1361DI-02 from AOZ1361DI-01?
The AOZ1361DI-02 implements a latch-off fault response: once thermal or over-current protection triggers, the output remains disabled until EN is toggled or VIN is cycled and junction temperature falls below 100°C. In contrast, AOZ1361DI-01 auto-restarts after thermal hysteresis. This makes AOZ1361DI-02 appropriate for safety-critical or maintenance-intervention-required scenarios where uncontrolled re-engagement is unacceptable.
How is current limit set on AOZ1361DI-02?
Current limit on AOZ1361DI-02 is set by connecting a resistor between the SET pin and GND. For example, a 74.5 kΩ resistor yields a typical current limit of 2.7A at VIN = 12V. The relationship is monotonic and documented in Figure 3 of the datasheet; values between 65 kΩ and 90 kΩ correspond to 2.0–3.4A limits. No calibration or trimming is required.
What is the purpose of the TFLT pin on AOZ1361DI-02?
The TFLT pin on AOZ1361DI-02 sets the fault delay time before FLTB asserts low during over-current or thermal events. A capacitor from TFLT to GND determines this delay-1 nF yields 600 µs. This prevents false triggering from brief transients while ensuring reliable detection of sustained faults, improving system robustness in electrically noisy environments.
Does AOZ1361DI-02 require an external pull-up on FLTB?
Yes, AOZ1361DI-02 requires an external pull-up resistor (typically 100 kΩ to 5V) on the FLTB pin because it is an open-drain output. Without this pull-up, FLTB cannot drive a valid logic-high level when no fault is present. The internal pull-down only activates during fault conditions, so external biasing is essential for clean digital interfacing with MCUs or CPLDs.
Can AOZ1361DI-02 operate at 4.5V input with full 3A capability?
No-while AOZ1361DI-02 functions down to 4.5V input, its RDS(ON) increases to 33–43 mΩ at VIN = 4.5V (vs. 22–35 mΩ at 12V), raising conduction loss. At 3A, power dissipation exceeds 300 mW, demanding careful thermal design. For reliable 3A operation, ≥6V input is recommended; derating to 2A is advised at 4.5V per thermal limits in the datasheet.
AOZ1361DI-02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 10-WDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 4.5V ~ 28V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- -
- Rds On (Typ):
- 22mOhm
- Input Type:
- Non-Inverting
- Features:
- Slew Rate Controlled, Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (4x4)
AOZ1361DI-02 FAQ
1.How can I place an order for AOZ1361DI-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ1361DI-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 AOZ1361DI-02 reliable?
The price and inventory of AOZ1361DI-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ1361DI-02 is usually 5 days.
3.What payment methods are accepted for AOZ1361DI-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ1361DI-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ1361DI-02?
AOZ1361DI-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ1361DI-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 AOZ1361DI-02?
For technical support, including AOZ1361DI-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ1361DI-02 requirements.
6.How does Aetrix verify that AOZ1361DI-02 is sourced from the original manufacturer or authorized distributors?
All AOZ1361DI-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 AOZ1361DI-02 meets industry standards.
7.What is the process for return or replacement of AOZ1361DI-02?
All AOZ1361DI-02 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ1361DI-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 AOZ1361DI-02 part is unused and in its original packaging.
Return procedure for AOZ1361DI-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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