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Diodes Incorporated AP7331-30SNG-7
- Part No.:
- AP7331-30SNG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7331-30SNG-7.pdf
- Description:
- IC REG LINEAR 3V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:4,558
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Product details
Overview
AP7331-30SNG-7 from Diodes Incorporated is a fixed-output 3.0V, 300mA low-dropout linear regulator in DFN2020-6 package with enable control, 65μA quiescent current, 300mV typical dropout at full load, and fast 80μs startup-designed for battery-powered wireless LAN cards and portable computing systems requiring stable low-power voltage regulation.
For engineers reviewing the AP7331-30SNG-7 datasheet, AP7331-30SNG-7 pinout, AP7331-30SNG-7 application, or AP7331-30SNG-7 equivalent, key selection criteria include its 2V–6V input range, ±2% output accuracy over –40°C to +85°C, PSRR of 65dB at 100Hz, thermal shutdown at 140°C, and compatibility with 1μF ceramic output capacitors.
Technical Context
The AP7331-30SNG-7 integrates a PMOS pass transistor, bandgap reference (0.4V), error amplifier, current-limit circuitry (400–600mA), and thermal shutdown (140°C trip, 15°C hysteresis). Its EN pin enables logic-level on/off control with VIH ≥ 1.4V and VIL ≤ 0.4V.
It delivers fast transient response due to internal compensation optimized for 1μF–4.7μF X7R/X5R ceramic output capacitors, achieving <±0.6% load regulation from 1mA to 300mA and minimal overshoot/undershoot during 1mA↔300mA load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% over –40°C to +85°C - ensures stable core/system rail for 3.3V-tolerant I/O or 3.0V logic domains. |
| Max Output Current | 300mA continuous - supports moderate-power RF front-ends, microcontroller peripherals, or sensor interfaces. |
| Quiescent Current | 65μA typical at full load - extends battery life in always-on or low-duty-cycle portable devices. |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to 3.3V input for 3.0V output, critical for single-cell Li-ion or dual-cell alkaline systems. |
| PSRR | 65dB typical at 100Hz - suppresses low-frequency power supply noise from switching converters feeding the LDO input. |
| Startup Time | 80μs - allows rapid wake-up from deep sleep without compromising system responsiveness. |
| Thermal Shutdown | 140°C junction temperature with 15°C hysteresis - provides self-recovery protection under sustained overload or poor PCB thermal design. |
Pinout & Package
AP7331-30SNG-7 uses the DFN2020-6 (2.0mm × 2.0mm, 0.65mm pitch) package with wettable flank leads for automated optical inspection. Pin 1 (EN) is top-left corner marked by pin-1 indicator; exposed thermal pad (Pin 6) is GND-connected for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control: drives regulator ON when ≥1.4V; pulls to GND or leaves floating (tied to IN) for always-ON operation. |
| 2 (GND) | Ground reference | Power and signal return path; must be connected to low-impedance ground plane for stability and thermal dissipation. |
| 3 (IN) | Input voltage supply | Accepts 2V–6V DC; requires ≥1μF ceramic bypass capacitor placed adjacent to this pin for noise suppression. |
| 4 (OUT) | Regulated output | Delivers stable 3.0V; requires ≥1μF ceramic capacitor between OUT and GND, placed as close as possible to minimize loop inductance. |
| 5 (NC) | No connection | Internally unconnected; must remain floating-no external tie or routing permitted. |
| 6 (GND) | Thermal pad / GND | Exposed copper pad soldered to PCB ground plane; essential for thermal resistance reduction (θJA = 167°C/W) and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Low IQ across full load | 65μA typical at 300mA - enables >1-year battery life in coin-cell–powered IoT sensors with 10s sleep duty cycle. |
| Stable with 1μF ceramic output cap | Eliminates need for larger tantalum or aluminum electrolytic caps - reduces BOM cost and board area in space-constrained designs. |
| Fast line/load transient response | Controlled undershoot/overshoot during 1mA↔300mA steps - prevents brownout resets in DSP or RF ICs with pulsed current draw. |
| Built-in fault protection | Current limit (≈600mA), short-circuit clamp (≈100mA), and thermal shutdown (140°C) - removes need for external protection circuitry. |
| Green packaging | RoHS-compliant, halogen-free molding compound - meets environmental compliance requirements for global consumer and industrial markets. |
Applications
| Wireless LAN Modules | XDSL Customer Premises Equipment |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz WLAN baseband ICs and RF transceivers in compact M.2 or mini-PCIe modules. IC Role / Device Role / Timing Role: Primary 3.0V supply rail regulator with enable control synchronized to Wi-Fi link state (active/idle). Use Value: 80μs startup and fast transient response prevent packet loss during rapid channel switching or beacon reception bursts. |
Use Scenario: Providing clean 3.0V bias to ADSL/VDSL line drivers and analog front-end (AFE) circuits in home gateways. IC Role / Device Role / Timing Role: Low-noise post-regulator downstream of buck converter, rejecting switching ripple via 65dB PSRR at 100Hz. Use Value: 300mV dropout enables efficient use of 3.3V intermediate rail, minimizing heat generation in thermally constrained plastic enclosures. |
| Notebook Subsystem Rails | Portable Medical Sensors |
|
Use Scenario: Supplying 3.0V to embedded controller (EC), keyboard controller, or USB hub logic in ultra-thin notebooks. IC Role / Device Role / Timing Role: Always-on or EN-controlled auxiliary LDO supporting suspend-to-RAM and instant-on functionality. Use Value: 65μA quiescent current minimizes battery drain during multi-day standby, meeting OEM platform power budget targets. |
Use Scenario: Regulating power for low-power ECG, pulse oximeter, or glucose meter analog signal chains and BLE SoCs. IC Role / Device Role / Timing Role: Precision 3.0V reference-grade supply ensuring ADC accuracy and sensor excitation stability. Use Value: ±2% output accuracy and excellent load regulation maintain measurement repeatability across battery discharge (2.8V–4.2V input). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 300mA, 3.0V fixed, 1.6μA IQ, SOT23-5 - ultra-low IQ but higher 600mV dropout at 250mA. | Better for multi-year coin-cell use; unsuitable for <3.6V input where dropout margin is critical. | Choose MCP1700T-3002E/MB only if input voltage remains ≥3.6V and IQ dominates system budget. |
| Torex XC6206P302MR-G | 300mA, 3.0V fixed, 12μA IQ, SOT23-5 - lower IQ and smaller footprint, but no EN pin and 400mV dropout at 300mA. | Lacks enable control; requires external MOSFET for sequencing; less suitable for dynamic power gating. | Select XC6206P302MR-G only when EN functionality is unnecessary and board space is severely constrained. |
Compared with MCP1700T-3002E/MB and XC6206P302MR-G, AP7331-30SNG-7 uniquely balances 65μA IQ, 300mV dropout, integrated EN, and DFN2020-6 thermal performance-making it optimal for compact, battery-powered systems requiring both efficiency and controllability.
Availability
AP7331-30SNG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL customer premises equipment, and portable medical sensors requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for AP7331-30SNG-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 consumer markets.
The AP7331 belongs to Diodes' low-quiescent-current LDO portfolio, engineered specifically for portable and battery-operated applications demanding ultra-low standby power, fast transient response, and robust fault protection in miniature packages.
FAQ
What is the minimum input voltage required for AP7331-30SNG-7 to regulate 3.0V output at 300mA?
The AP7331-30SNG-7 requires VIN ≥ 3.3V to maintain regulation at 300mA, based on its 300mV typical dropout voltage. At 2.8V input, output drops below 3.0V under full load. Input must stay within 2V–6V absolute rating, but functional regulation starts at VOUT + VDropout.
Can AP7331-30SNG-7 operate without an output capacitor?
No. The AP7331-30SNG-7 requires a minimum 1μF ceramic output capacitor between OUT and GND for stability and transient response. Omitting it causes oscillation, excessive overshoot, or failure to regulate. X7R/X5R dielectrics with 10–200mΩ ESR are specified.
Is the NC pin (Pin 5) safe to connect to GND or leave floating?
Pin 5 is internally unconnected and must remain floating-neither tied to GND nor routed. Connecting it may cause unpredictable behavior or damage. The DFN2020-6 datasheet explicitly defines it as "No Connection" with no internal bond wire or circuit node.
How does thermal shutdown behave under sustained overload conditions?
When junction temperature reaches ~140°C, AP7331-30SNG-7 disables the output. It re-enables automatically once temperature falls to ~125°C (15°C hysteresis). Under continuous overload, this results in thermal cycling-visible as intermittent output voltage collapse and recovery every few seconds.
AP7331-30SNG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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:
- U-DFN2020-6
AP7331-30SNG-7 FAQ
1.How can I place an order for AP7331-30SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-30SNG-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 AP7331-30SNG-7 reliable?
The price and inventory of AP7331-30SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-30SNG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-30SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-30SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-30SNG-7?
AP7331-30SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-30SNG-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 AP7331-30SNG-7?
For technical support, including AP7331-30SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-30SNG-7 requirements.
6.How does Aetrix verify that AP7331-30SNG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-30SNG-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 AP7331-30SNG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-30SNG-7?
All AP7331-30SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-30SNG-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 AP7331-30SNG-7 part is unused and in its original packaging.
Return procedure for AP7331-30SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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