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Diodes Incorporated AP7331-30WG-7
- Part No.:
- AP7331-30WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7331-30WG-7.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,774
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Product details
Overview
AP7331-30WG-7 from Diodes Incorporated is a fixed-output 3.0V, 300mA low-dropout linear regulator in SOT25 package with enable control, 65μA quiescent current, 300mV dropout at full load, and fast 80μs startup-designed for battery-powered wireless LAN cards and XDSL routers requiring stable low-power voltage regulation.
For engineers reviewing the AP7331-30WG-7 datasheet, AP7331-30WG-7 pinout, AP7331-30WG-7 application, or AP7331-30WG-7 equivalent, key selection criteria include dropout voltage under 300mA load, EN logic thresholds (VIH = 1.4V, VIL = 0.4V), PSRR of 65dB at 100Hz, thermal shutdown at 140°C, and compatibility with 1μF ceramic output capacitors.
Technical Context
The AP7331-30WG-7 integrates a PMOS pass element, bandgap reference (0.4V), error amplifier, and protection circuitry including current limit (400–600mA), short-circuit clamp (~100mA), and thermal shutdown with 15°C hysteresis. Its architecture enables stable regulation without minimum load.
It operates across 2V–6V input, delivers ±2% output accuracy over –40°C to +85°C ambient, and maintains 65dB PSRR at 100Hz due to internal compensation optimized for 1μF ceramic output capacitance-enabling fast line/load transient response with <100mV undershoot/overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% over –40°C to +85°C; supports noise-sensitive 3.3V-tolerant I/O rails with margin. |
| Max Output Current | 300mA continuous; current limit activates at 400–600mA to prevent thermal runaway during overload. |
| Quiescent Current | 65μA typical at 300mA load; enables >1-year battery life in always-on IoT sensors with 200mAh coin cells. |
| Dropout Voltage | 300mV typical at 300mA; allows operation down to 3.3V input for 3.0V output-critical for single-cell Li-ion or 2xAA systems. |
| PSRR | 65dB at 100Hz; suppresses switching noise from adjacent DC-DC converters in compact PCB layouts. |
| Startup Time | 80μs from EN high to regulated output; synchronizes power-up with baseband processors in GSM/TDMA burst-mode systems. |
| Thermal Shutdown | Triggers at 140°C junction temperature with 15°C hysteresis; prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
SOT25 package (2.9mm × 2.8mm × 1.3mm) with exposed pad for thermal enhancement; RoHS-compliant, lead-free finish; "Green" molding compound (no Br/Sb).
| 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 PCB ground plane to minimize ESR and ensure thermal performance. |
| 3 - EN | Enable control input | Active-high logic interface; VIH ≥1.4V, VIL ≤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 3.0V ±2%; stable with 1–4.7μF X7R/X5R ceramic capacitors; place capacitor within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 65μA at full 300mA load enables multi-year operation in energy-harvesting and battery-backed applications. |
| Fast transient response | Stable output during 0→300mA load steps with <100mV deviation-supports burst-mode DSP and RF ICs. |
| Low-ESR capacitor support | Stable with 10–200mΩ ESR ceramic capacitors; eliminates need for bulk electrolytic or tantalum output caps. |
| Integrated protection | Current limit, short-circuit clamp, and thermal shutdown operate autonomously-no external components needed. |
| Wide input range | 2V–6V operation accommodates single-cell Li-ion (2.7–4.2V), 2xAA (2.0–3.2V), and 3.3V/5V system rails. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz WLAN baseband ICs and RF front-end modules in compact PCIe Mini Card form factor. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying core logic and analog blocks; enables rapid enable/disable synchronized with Wi-Fi sleep/wake cycles. Use Value: 80μs startup and fast transient response prevent packet loss during channel switching; 65μA IQ extends standby time between beacon intervals. |
Use Scenario: Regulating 3.0V rail for ADSL2+/VDSL2 PHY and microcontroller subsystems in residential gateways. IC Role / Device Role / Timing Role: Secondary LDO downstream of main DC-DC converter; provides clean, low-noise supply isolated from digital switching noise. Use Value: 65dB PSRR at 100Hz suppresses ripple from 300kHz–1MHz buck converters; dropout margin ensures regulation during brown-out events. |
| Battery-Powered Sensors | Notebook Subsystems |
|
Use Scenario: Powering ultra-low-power environmental sensors (temperature/humidity/accelerometer) in Bluetooth LE beacons. IC Role / Device Role / Timing Role: Always-on 3.0V regulator maintaining real-time clock and sensor interface while host MCU sleeps. Use Value: 65μA IQ minimizes self-discharge; no-load stability eliminates need for bleed resistors-preserving battery capacity over years. |
Use Scenario: Supplying 3.0V to USB 3.0 controller, card reader, or embedded security module in thin-and-light notebooks. IC Role / Device Role / Timing Role: Point-of-load regulator with EN controlled by platform controller hub (PCH) for dynamic power gating. Use Value: EN pin logic thresholds compatible with 3.3V GPIO; SOT25 footprint fits tight layout constraints near high-speed interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3002E/TO | 250mA max output, 1.6μA IQ (lower), but 600mV dropout at 250mA-higher than AP7331's 300mV. | Preferred for micropower sensor nodes where IQ dominates lifetime; less suitable for 300mA burst loads. | Select when ultra-low IQ outweighs current capability and dropout; verify thermal derating at 300mA. |
| TLS850F3TAV50 | Automotive-grade AEC-Q100, 500mA output, 35μA IQ, but requires 3.5V min input-cannot operate from 2V sources. | Targeted at automotive infotainment and ADAS; not qualified for commercial temp range or cost-sensitive consumer gear. | Choose only for automotive designs needing extended temperature (-40°C to +150°C) and fault diagnostics. |
Compared with MCP1700-3002E/TO and TLS850F3TAV50, the AP7331-30WG-7 uniquely balances 300mA delivery, 300mV dropout, and 65μA IQ in a commercial-grade SOT25 package-making it optimal for space-constrained, battery-operated networking equipment where both peak current and standby efficiency matter.
Availability
AP7331-30WG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered sensor nodes requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for AP7331-30WG-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7331 belongs to Diodes' low-dropout linear regulator product line, engineered specifically for portable and battery-powered systems demanding ultra-low quiescent current, fast transient response, and robust protection in miniature packages.
FAQ
What is the minimum input voltage required for AP7331-30WG-7 to maintain 3.0V output at 300mA?
The AP7331-30WG-7 requires input voltage ≥3.3V to sustain 3.0V output at 300mA load, based on its typical 300mV dropout voltage specification. At lower inputs (e.g., 3.2V), output drops below regulation due to increased dropout-verified per Electrical Characteristics table (VDROP = 300mV typ. at IOUT = 300mA).
Can AP7331-30WG-7 operate without an output capacitor?
No. The AP7331-30WG-7 requires a minimum 1μF ceramic output capacitor (X7R/X5R, 10–200mΩ ESR) for stability and transient response, as confirmed in the Application Note section. Omitting it causes oscillation and output voltage collapse under load, per design validation in DS31914 Rev. 3–2.
Is the EN pin internally pulled up or does it require external bias?
The EN pin has no internal pull-up; it must be actively driven to ≥1.4V for enable or ≤0.4V for disable. If unused, Diodes recommends tying EN directly to IN to ensure always-on operation-this is explicitly stated in the Application Note under "ON/OFF Input Operation."
Does AP7331-30WG-7 support adjustable output voltages?
No. AP7331-30WG-7 is a fixed 3.0V output variant (denoted by "30" in part number). Adjustable versions use "ADJ" suffix (e.g., AP7331-ADJWG-7) and require external resistor divider on ADJ pin-confirmed in Ordering Information and Pin Descriptions sections of DS31914.
AP7331-30WG-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):
- 3V
- 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
AP7331-30WG-7 FAQ
1.How can I place an order for AP7331-30WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-30WG-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 AP7331-30WG-7 reliable?
The price and inventory of AP7331-30WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-30WG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-30WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-30WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-30WG-7?
AP7331-30WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-30WG-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 AP7331-30WG-7?
For technical support, including AP7331-30WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-30WG-7 requirements.
6.How does Aetrix verify that AP7331-30WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-30WG-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 AP7331-30WG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-30WG-7?
All AP7331-30WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-30WG-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 AP7331-30WG-7 part is unused and in its original packaging.
Return procedure for AP7331-30WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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