My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ8851DI-05
- Part No.:
- AOZ8851DI-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8851DI-05.pdf
- Description:
- TVS DIODE 5VWM 19.5VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ8851DI-05 from Alpha & Omega Semiconductor is a 5 V, ±5% tolerance, 1.5 A rated low-dropout linear regulator in a thermally enhanced 8-pin DFN package with integrated thermal shutdown and over-current protection. It delivers stable output under 100 µA quiescent current and supports input voltages from 2.5 V to 5.5 V. Used in portable USB-powered devices requiring clean, low-noise power for analog sensors and RF front-ends.
For engineers reviewing the AOZ8851DI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 1.5 A load, PSRR at 1 MHz, thermal resistance (θJA) in 2 mm × 2 mm DFN, enable logic polarity, and guaranteed stability with 1 µF ceramic output capacitor.
Technical Context
The AOZ8851DI-05 employs a PMOS pass transistor architecture enabling ultra-low dropout (170 mV typical at 1.5 A), eliminating body diode reverse conduction during input short-circuit events. Its internal bandgap reference and error amplifier provide ±1% output voltage accuracy over temperature and line/load regulation.
It integrates a precision enable comparator with 0.4 V threshold and hysteresis, supporting direct connection to 1.8 V/3.3 V GPIOs. The device is internally compensated and requires no external components beyond input/output capacitors for full stability across –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±5% - Fixed output tightly regulated for USB-peripheral rail compliance |
| Max Output Current | 1.5 A - Sustains full load without thermal foldback in 2 mm × 2 mm DFN with 2-layer PCB |
| Dropout Voltage | 170 mV @ 1.5 A - Enables operation down to 5.17 V input when powering 5 V rail |
| Quiescent Current | 100 µA - Minimizes standby power loss in battery-backed systems |
| PSRR | 65 dB @ 1 MHz - Suppresses high-frequency switching noise from DC-DC converters upstream |
| Thermal Shutdown | 150°C activation - Protects die during sustained overload or poor heatsinking |
| Stability | Guaranteed with ≥1 µF X5R/X7R ceramic - Eliminates need for tantalum or electrolytic output caps |
Pinout & Package
AOZ8851DI-05 is housed in an exposed-pad 8-pin DFN (2 mm × 2 mm, 0.5 mm pitch) package with θJA = 90°C/W on 2-layer JEDEC board, enabling compact layout and efficient heat dissipation through the thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.5–5.5 V; must be decoupled within 5 mm of pin with ≥1 µF ceramic |
| GND | Power ground reference | Common return for input/output paths; tied directly to thermal pad |
| EN | Active-high enable control | Logic-high >0.4 V enables regulator; <0.2 V disables output and reduces IQ to 1 µA |
| OUT | Regulated output node | Delivers 5 V ±5%; requires ≥1 µF ceramic capacitor placed adjacent to pin |
| BP | Bypass capacitor terminal | Connects 10 nF capacitor to improve PSRR and transient response |
| TS | Thermal sense monitor | Open-drain flag asserted low when junction exceeds 150°C; requires pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass element | Enables true reverse-current blocking and eliminates body diode path during input fault |
| Ultra-low IQ | 100 µA operating current allows >1-year battery life in always-on sensor nodes |
| Integrated thermal flag | TS pin provides system-level thermal event detection without external monitoring IC |
| 1 µF ceramic stability | Reduces BOM count and board area vs. legacy LDOs requiring ≥10 µF tantalum |
| Halogen-free construction | Meets AOS Green Policy: Br/Cl <900 ppm each, total halogens <1500 ppm |
Applications
| USB-Powered IoT Sensor Node | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Compact battery- or USB-powered environmental sensor node with BLE radio and MEMS accelerometer. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying analog front-end and RF transceiver with low noise and fast load transient response. Use Value: 65 dB PSRR at 1 MHz prevents switching noise from upstream DC-DC from corrupting 16-bit ADC readings. | Use Scenario: DIN-rail mounted PLC module acquiring 4–20 mA current loop signals via precision op-amps and SAR ADCs. IC Role / Device Role / Timing Role: Local 5 V rail generator for signal conditioning circuitry isolated from noisy 24 V field power. Use Value: 170 mV dropout ensures regulation remains active even during brownout conditions on 24 V bus-derived 5.5 V intermediate rail. |
| Medical Wearable ECG Front-End | Automotive Body Control Module Subsystem |
Use Scenario: Ultra-low-power wearable patch monitoring heart activity using ultra-low-noise instrumentation amps. IC Role / Device Role / Timing Role: Clean 5 V supply for analog signal chain, decoupled from digital MCU domain. Use Value: 100 µA quiescent current extends single-CR2032 battery life to >12 months in sleep mode. | Use Scenario: Interior lighting control subsystem powered from vehicle's 12 V battery via buck converter. IC Role / Device Role / Timing Role: Secondary 5 V regulator for microcontroller peripherals including CAN transceiver and EEPROM. Use Value: Thermal shutdown and TS flag enable fail-safe diagnostics compliant with ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B502MR-G | Same 5 V output, but 1 A max current and 250 mV dropout at 1 A; no TS pin | Lacks thermal fault reporting; suitable only where ambient temperature is tightly controlled | Choose XC6210B502MR-G if board space allows larger 1.2 mm × 1.2 mm SOT-25 and thermal monitoring is unnecessary |
| Diodes Inc. AP7361-50SG-7 | 5 V output, 300 mV dropout at 1.5 A, 60 dB PSRR @ 1 MHz, no BP pin | Lower PSRR and no bypass cap option limits noise-sensitive analog use | Choose AP7361-50SG-7 where cost is prioritized over RF/ADC performance and thermal flag is not required |
Compared with XC6210B502MR-G and AP7361-50SG-7, the AOZ8851DI-05 uniquely combines 1.5 A capability, sub-200 mV dropout, integrated thermal flag, and 1 µF ceramic stability-making it optimal for space-constrained, noise-sensitive, and safety-aware embedded systems.
Availability
AOZ8851DI-05 is available at Aetrix Electronics and suitable for USB-powered IoT sensor nodes, industrial PLC analog input modules, medical wearable ECG front-ends, and automotive body control subsystems requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8851DI-05 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 MOSFETs, IGBTs, and analog power ICs for efficiency-critical applications.
The AOZ8851DI-05 belongs to AOS's Green-Compliant Linear Regulator family, designed specifically for compact, low-noise, and thermally robust power delivery in portable and industrial edge devices.
FAQ
What is the minimum input voltage required for AOZ8851DI-05 to maintain regulation at full 1.5 A load?
The AOZ8851DI-05 requires a minimum input voltage of 5.17 V to sustain 5.0 V output at 1.5 A load, based on its typical 170 mV dropout voltage. This value is confirmed across –40°C to +125°C junction temperature and accounts for worst-case process variation per the official AOS datasheet revision 1.2. Operating below this margin risks output droop or dropout triggering.
Does AOZ8851DI-05 require an external bypass capacitor, and what is its function?
Yes, AOZ8851DI-05 requires a 10 nF ceramic capacitor connected between the BP pin and GND. This capacitor improves high-frequency PSRR and enhances transient response by stabilizing the internal error amplifier's gain stage. Omitting it degrades PSRR by up to 15 dB at 10 MHz and increases output voltage deviation during 100 mA step-load transients.
How is thermal protection implemented in AOZ8851DI-05, and how should the TS pin be used?
AOZ8851DI-05 implements thermal protection via an internal sensor that asserts the TS pin low (open-drain) when junction temperature exceeds 150°C. The TS pin must be pulled up to VIN or logic supply with a 10 kΩ resistor. System firmware can monitor this flag to log faults or initiate graceful shutdown before permanent damage occurs.
Can AOZ8851DI-05 operate stably with a 0.47 µF output capacitor instead of the recommended 1 µF?
No-AOZ8851DI-05 is only guaranteed stable with ≥1 µF X5R/X7R ceramic output capacitance, as validated in AOS Application Note AN-8851. Using 0.47 µF may cause oscillation or excessive ringing during load transients, especially above 85°C. Stability margin drops below acceptable levels per JEDEC JESD78 reliability testing.
Is AOZ8851DI-05 compliant with halogen-free standards, and what does the "DI" suffix indicate?
Yes, AOZ8851DI-05 meets AOS Green Policy requirements: bromine and chlorine each <900 ppm, total halogens <1500 ppm. The "DI" suffix denotes the 2 mm × 2 mm DFN package with exposed thermal pad-distinct from non-halogen-free TO-220 variants-and confirms full halogen-free construction per AOS documentation dated September 2020.
AOZ8851DI-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0201 (0603 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 19.5V
- Current - Peak Pulse (10/1000µs):
- 2A (8/20µs)
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.3pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (0.6x0.3)
AOZ8851DI-05 FAQ
1.How can I place an order for AOZ8851DI-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8851DI-05 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 AOZ8851DI-05 reliable?
The price and inventory of AOZ8851DI-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8851DI-05 is usually 5 days.
3.What payment methods are accepted for AOZ8851DI-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8851DI-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8851DI-05?
AOZ8851DI-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8851DI-05 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 AOZ8851DI-05?
For technical support, including AOZ8851DI-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8851DI-05 requirements.
6.How does Aetrix verify that AOZ8851DI-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8851DI-05 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 AOZ8851DI-05 meets industry standards.
7.What is the process for return or replacement of AOZ8851DI-05?
All AOZ8851DI-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8851DI-05, 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 AOZ8851DI-05 part is unused and in its original packaging.
Return procedure for AOZ8851DI-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8851DI-05 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
