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Diodes Incorporated AP7331-20WG-7
- Part No.:
- AP7331-20WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7331-20WG-7.pdf
- Description:
- IC REG LINEAR 2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:5,973
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Product details
Overview
AP7331-20WG-7 from Diodes Incorporated is a fixed-output 2.0V, 300mA low-dropout linear regulator with enable control, 65μA quiescent current, 300mV dropout at full load, and stable operation with 1μF ceramic output capacitor. It integrates current limit, thermal shutdown, and short-circuit protection, and is deployed in battery-powered wireless LAN cards and XDSL routers where ultra-low standby power and fast transient response are critical.
For engineers reviewing the AP7331-20WG-7 datasheet, AP7331-20WG-7 pinout, AP7331-20WG-7 application, or AP7331-20WG-7 equivalent, key selection criteria include fixed 2.0V output accuracy (±2%), EN logic thresholds (VIH = 1.4V, VIL = 0.4V), PSRR of 65dB at 100Hz, startup time of 80μs, and compatibility with low-ESR ceramic capacitors.
Technical Context
The AP7331-20WG-7 implements a PMOS pass transistor architecture enabling low dropout (300mV typical at 300mA) and near-constant quiescent current (65μA typ. across 2–6V input and 0–300mA load). Its internal 0.4V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 2.0V divider network embedded in the die.
Protection circuitry includes foldback current limiting (400–600mA trip), short-circuit clamping (~100mA), and thermal shutdown activation at 140°C with 15°C hysteresis. The EN pin controls gate driver activation directly-no external pull-up required-and supports logic-level interfacing with microcontrollers or PMICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±2% over -40°C to +85°C ambient; enables direct powering of 2.0V I/O domains without external resistors. |
| Quiescent Current | 65μA typical at 300mA load; ensures >1-year battery life in always-on IoT sensors with 200mAh coin cells. |
| Dropout Voltage | 300mV typical at 300mA; allows regulation from 2.3V input (e.g., single LiFePO₄ cell) while delivering full rated current. |
| PSRR | 65dB at 100Hz; suppresses ripple from noisy DC-DC converters feeding the LDO input, critical for RF front-end stability. |
| Start-up Time | 80μs typical; synchronizes power delivery with processor wake-up signals in low-power MCU sleep/wake cycles. |
| Thermal Shutdown | Activates at 140°C junction temperature with 15°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Input Voltage Range | 2.0V to 6.0V; supports single-cell Li-ion (2.7–4.2V), LiFePO₄ (2.0–3.6V), and regulated 3.3V/5V rails. |
Pinout & Package
SOT25 package (3.0mm × 1.7mm × 1.3mm height), RoHS-compliant "Green" molding compound, lead-free finish. Pin 1 = IN, Pin 2 = GND, Pin 3 = EN, Pin 4 = NC, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise and ensure stability. |
| GND (Pin 2) | Power ground reference | Common return path for input/output currents and internal bias; must connect to low-impedance PCB ground plane. |
| EN (Pin 3) | Enable control input | Active-high logic interface (VIH ≥1.4V, VIL ≤0.4V); ties directly to MCU GPIO or PMIC enable signal without level-shifting. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating or grounded per layout guidelines-no external routing permitted. |
| OUT (Pin 5) | Regulated output voltage | Delivers stable 2.0V ±2%; requires ≥1μF ceramic capacitor with ESR 10–200mΩ placed within 2mm of pin for optimal transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ with full-load capability | 65μA quiescent current maintained at 300mA output, enabling >10x longer battery runtime vs. legacy LDOs in always-on sensor nodes. |
| Fast transient response | Stable output under 0→300mA load steps with <50mV undershoot/overshoot, eliminating need for oversized bulk capacitance in space-constrained designs. |
| Single-capacitor stability | Guaranteed stable with 1μF X5R/X7R ceramic output capacitor-reduces BOM count and PCB area vs. LDOs requiring ≥10μF tantalum. |
| Integrated fault protection | Three independent protections-current limit (600mA), short-circuit clamp (100mA), and thermal shutdown (140°C)-eliminate need for external protection ICs. |
| Logic-compatible enable | EN pin accepts standard 1.8V/3.3V logic levels; no external pull-up needed, simplifying host interface and reducing standby leakage. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
|
Use Scenario: Powering 2.0V WLAN baseband ICs and RF transceivers in mini-PCIe and M.2 form-factor adapters. IC Role / Device Role / Timing Role: Primary 2.0V supply rail regulator with fast load-step response to handle burst-mode TX/RX current demands. Use Value: 80μs startup and 65μA IQ extend adapter sleep-mode battery life; PSRR >65dB prevents WLAN packet errors from switching noise coupling. |
Use Scenario: Providing clean 2.0V bias to DSL line drivers and analog front-end (AFE) circuits in residential gateways. IC Role / Device Role / Timing Role: Low-noise post-regulator for noise-sensitive AFE stages, rejecting ripple from upstream buck converters. Use Value: 300mV dropout enables operation from 2.3V intermediate rail, improving system efficiency; thermal shutdown protects against sustained line fault conditions. |
| Notebook Computer Subsystems | Battery-Powered Test Equipment |
|
Use Scenario: Supplying 2.0V to embedded controller (EC) peripherals and touchpad controllers in ultrabook platforms. IC Role / Device Role / Timing Role: Always-on LDO for EC subsystems requiring guaranteed regulation during deep-sleep states (S3/S4). Use Value: 65μA IQ minimizes EC subsystem leakage; EN pin allows coordinated power sequencing with main SoC reset signals. |
Use Scenario: Powering precision ADC reference buffers and low-noise op-amps in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Ultra-stable analog supply rail with minimal voltage drift across temperature and load. Use Value: ±2% output accuracy and <50mV transient deviation ensure measurement repeatability; 1μF capacitor compatibility reduces probe size. |
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-2002E/MB | 250mA rating, 1.6μA IQ, 600mV dropout at 250mA, SOT23-5 package | Limited to lower current; better for micropower sensor nodes but unsuitable for 300mA WLAN bursts | Select when IQ <2μA is mandatory and peak load ≤250mA; avoid for high-transient applications. |
| TPS7A0520PDBVR | 200mA rating, 25μA IQ, 170mV dropout at 200mA, 1.5mm × 1.5mm DFN | Lower dropout and smaller footprint, but insufficient current headroom for 300mA loads | Prefer for space-constrained, low-IQ designs with ≤200mA average load; verify thermal margin at full load. |
Compared with MCP1700T-2002E/MB and TPS7A0520PDBVR, the AP7331-20WG-7 uniquely delivers 300mA continuous current with 65μA IQ and 300mV dropout-enabling single-LDO solutions for higher-power portable RF and computing subsystems where alternatives require parallel devices or derating.
Availability
AP7331-20WG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and notebook computer subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7331-20WG-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 power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.
The AP7331 belongs to Diodes' low-quiescent-current LDO product line, engineered specifically for battery-powered and energy-sensitive applications demanding ultra-low standby power without sacrificing transient performance or protection robustness.
FAQ
What is the minimum input voltage required for AP7331-20WG-7 to maintain 2.0V output at 300mA?
The AP7331-20WG-7 requires a minimum input voltage of 2.3V to sustain 2.0V output at 300mA load, based on its typical 300mV dropout voltage specification. At lower inputs, output regulation degrades linearly; operation below 2.0V input is prohibited per absolute maximum ratings.
Can AP7331-20WG-7 operate without an output capacitor?
No. The AP7331-20WG-7 requires a minimum 1μF ceramic output capacitor with ESR between 10mΩ and 200mΩ for stability and transient response. Omitting it causes oscillation, excessive overshoot/undershoot, and potential damage during load steps-per datasheet Section 8.2.
Is the NC pin (Pin 4) safe to connect to ground?
No. Pin 4 is internally unconnected and must remain floating or be left unpopulated on the PCB. Grounding it violates the recommended layout in Diodes' AP02001 pad document and may induce parasitic coupling or thermal stress due to unintended current paths.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches ~140°C, the AP7331-20WG-7 disables the pass element and holds output at 0V until temperature falls to ~125°C, then re-enables. This hysteresis prevents rapid cycling; however, repeated tripping indicates inadequate PCB copper area or excessive power dissipation (>640mW in SOT25).
AP7331-20WG-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):
- 2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 300mA
- 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
AP7331-20WG-7 FAQ
1.How can I place an order for AP7331-20WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-20WG-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 AP7331-20WG-7 reliable?
The price and inventory of AP7331-20WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-20WG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-20WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-20WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-20WG-7?
AP7331-20WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-20WG-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 AP7331-20WG-7?
For technical support, including AP7331-20WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-20WG-7 requirements.
6.How does Aetrix verify that AP7331-20WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-20WG-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 AP7331-20WG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-20WG-7?
All AP7331-20WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-20WG-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 AP7331-20WG-7 part is unused and in its original packaging.
Return procedure for AP7331-20WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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