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Diodes Incorporated AP7331-10WG-7
- Part No.:
- AP7331-10WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7331-10WG-7.pdf
- Description:
- IC REG LINEAR 1V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,131
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Product details
Overview
AP7331-10WG-7 from Diodes Incorporated is a fixed-output 1.0V, 300mA low-dropout linear regulator in SOT25 package with enable control, 65μA quiescent current, 300mV dropout at full load, and stable operation with 1μF ceramic output capacitor. It serves as a primary power rail regulator for low-power digital ICs in battery-powered wireless LAN cards and notebook standby domains.
For engineers reviewing the AP7331-10WG-7 datasheet, AP7331-10WG-7 pinout, AP7331-10WG-7 application, or AP7331-10WG-7 equivalent, key selection criteria include dropout voltage under 300mA load, EN logic threshold compatibility with 1.8V/3.3V GPIO, thermal shutdown behavior at 140°C, and PSRR performance at 100Hz for noise-sensitive RF subsystems.
Technical Context
The AP7331-10WG-7 integrates a P-channel pass transistor, bandgap reference (0.4V), error amplifier, current-limit circuit (400–600mA), and thermal shutdown (140°C trip, 15°C hysteresis). Its fixed 1.0V output eliminates external feedback resistors, simplifying layout while maintaining ±2% accuracy across –40°C to +85°C ambient.
It operates from 2V to 6V input, delivers fast 80μs startup, and achieves 65dB PSRR at 100Hz-critical for powering baseband processors in TDMA-based systems where load transients shift from 100μA to 300mA within microseconds without overshoot exceeding 50mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±2% over –40°C to +85°C; enables direct powering of 1.0V core rails in modern SoCs. |
| Max Output Current | 300mA continuous; supports single-core microcontrollers, USB PHYs, and low-power FPGAs. |
| Quiescent Current | 65μA typical at full load; extends battery life in always-on sensor nodes and standby circuits. |
| Dropout Voltage | 300mV typical at 300mA; allows regulation from 1.3V input-ideal for single-cell LiFePO₄ or dual-cell alkaline systems. |
| PSRR @ 100Hz | 65dB typical; suppresses ripple from switching DC/DC stages upstream, protecting analog/RF sections. |
| Enable Threshold | VIH = 1.4V min, VIL = 0.4V max; compatible with 1.8V and 3.3V logic families without level-shifting. |
| Thermal Shutdown | 140°C junction trip with 15°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 package (2.9mm × 2.8mm × 1.3mm), RoHS-compliant "Green" molding compound, lead-free finish. Thermal resistance θJA = 190°C/W on standard FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for stability and noise rejection. |
| 2 - GND | Power ground reference | Low-impedance return path; must connect directly to solid ground plane to minimize EMI and ensure thermal performance. |
| 3 - EN | Enable control input | Active-high logic input; drives regulator ON when ≥1.4V, OFF when ≤0.4V; tie to IN if always-on operation required. |
| 4 - NC | No connection | Internally unconnected; must remain floating-no external bias or routing permitted. |
| 5 - OUT | Regulated output | Delivers stable 1.0V; requires ≥1μF ceramic capacitor (X5R/X7R, ESR 10–200mΩ) placed within 2mm of pin for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 65μA at full 300mA load-enables >1-year battery life in coin-cell–powered IoT sensors. |
| Fast transient response | Stable 1.0V output during 0→300mA load steps with <50mV undershoot/overshoot-supports GSM/EDGE burst-mode operation. |
| Single-capacitor stability | Guaranteed stable with 1μF ceramic output capacitor-reduces BOM count and board area vs. legacy LDOs requiring ≥10μF. |
| Integrated protection | Current limit (≈600mA), short-circuit clamp (≈100mA), and thermal shutdown (140°C)-eliminates need for external fault management circuitry. |
| Wide input range | 2V–6V operation accommodates diverse sources: Li-ion (2.7–4.2V), LiFePO₄ (2.0–3.6V), and dual AA/AAA (2.4–3.2V). |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
|
Use Scenario: Powering 1.0V WLAN baseband processor and RF transceiver during active transmit/receive bursts. IC Role / Device Role / Timing Role: Primary 1.0V core regulator delivering clean, low-noise supply with sub-80μs startup to meet IEEE 802.11ac duty-cycle timing. Use Value: 65dB PSRR at 100Hz rejects switching noise from upstream buck converter; fast transient response prevents packet loss during rapid load shifts. |
Use Scenario: Supplying 1.0V PHY layer logic in ADSL2+ line interface cards operating in temperature-variable DSLAM cabinets. IC Role / Device Role / Timing Role: Secondary LDO for DSL PHY core, enabling independent power sequencing and brownout immunity below 2.0V input. Use Value: 300mV dropout allows regulation down to 1.3V input-critical during AC-line sags; –40°C to +85°C rating ensures field reliability. |
| Notebook Standby Rail | Battery-Powered Medical Sensors |
|
Use Scenario: Providing always-on 1.0V supply to real-time clock, lid-open detection, and wake-on-LAN circuitry during S3/S4 sleep states. IC Role / Device Role / Timing Role: Low-IQ auxiliary regulator activated only when system is in deep-sleep mode, controlled via chipset EN signal. Use Value: 65μA quiescent current minimizes battery drain during multi-week storage; EN pin enables precise power-state coordination with host controller. |
Use Scenario: Regulating power for ultra-low-power ECG front-end ASIC and BLE radio in disposable wearable patches. IC Role / Device Role / Timing Role: Single-component 1.0V source for analog signal chain and digital radio, eliminating need for external feedback network. Use Value: Fixed 1.0V output reduces component count and layout complexity; green packaging meets medical device RoHS and halogen-free requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/TT (Microchip) | 100mA max output, 2.0μA IQ, 6V max input, SOT23-3 package (no EN pin) | Limited to sub-100mA loads; lacks enable control and thermal shutdown | Select only for ultra-low-IQ, low-current applications where EN and fault protection are unnecessary. |
| Torex XC6206P102MR-G (Torex) | 150mA max output, 1.0μA IQ, 6V max input, SOT23-3 (no EN), ±2% accuracy | Lower current capability and no enable or thermal protection; optimized for lowest possible IQ | Prefer for energy-harvesting designs where 150mA suffices and 1μA IQ outweighs missing features. |
Compared with MCP1700T-1002E/TT and XC6206P102MR-G, the AP7331-10WG-7 uniquely combines 300mA drive, 65μA IQ, integrated EN, current limit, and thermal shutdown in a cost-effective SOT25-making it the only drop-in solution for 1.0V/300mA applications requiring robust fault handling and fast transient response.
Availability
AP7331-10WG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and notebook standby rails requiring stable component supply, long-lifecycle availability, and RoHS-compliant green packaging.
Supply support for AP7331-10WG-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
The AP7331 belongs to Diodes' low-quiescent-current LDO family, designed specifically for battery-powered and energy-sensitive applications where ultra-low IQ, fast transient response, and integrated protection are mandatory-not optional.
FAQ
What is the minimum input voltage required for stable 1.0V output at 300mA?
The AP7331-10WG-7 maintains regulation down to VIN = VOUT + VDROP = 1.0V + 0.3V = 1.3V under nominal conditions. However, the datasheet specifies a recommended minimum input of 2.0V to guarantee performance across temperature, process variation, and load transients. Below 2.0V, dropout margin shrinks and PSRR degrades.
Can the EN pin be left unconnected, or must it be tied high?
The EN pin must not be left floating-it will cause unpredictable on/off behavior due to noise coupling. If always-on operation is required, tie EN directly to the IN pin. For controlled enable/disable, drive EN with a clean logic signal meeting VIH ≥ 1.4V and VIL ≤ 0.4V; series resistor up to 100kΩ is acceptable for noise filtering.
Is a minimum load required for output stability?
No minimum load is required. The AP7331-10WG-7 remains stable and regulated from zero load to 300mA, as confirmed in the datasheet's "No Load Stability" section. This eliminates the need for dummy loads in low-power sleep modes, reducing system power consumption.
Does the 1μF output capacitor requirement apply to all ceramic dielectrics?
The 1μF minimum applies specifically to X5R or X7R ceramic capacitors with ESR between 10mΩ and 200mΩ. Y5V or Z5U types are not recommended due to capacitance drift with voltage/temperature; tantalum or aluminum electrolytics are incompatible and may cause oscillation.
AP7331-10WG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7331-10WG-7 FAQ
1.How can I place an order for AP7331-10WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-10WG-7 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 AP7331-10WG-7 reliable?
The price and inventory of AP7331-10WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-10WG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-10WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-10WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-10WG-7?
AP7331-10WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-10WG-7 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 AP7331-10WG-7?
For technical support, including AP7331-10WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-10WG-7 requirements.
6.How does Aetrix verify that AP7331-10WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-10WG-7 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 AP7331-10WG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-10WG-7?
All AP7331-10WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-10WG-7, 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 AP7331-10WG-7 part is unused and in its original packaging.
Return procedure for AP7331-10WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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