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Diodes Incorporated AP7331-12SNG-7
- Part No.:
- AP7331-12SNG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7331-12SNG-7.pdf
- Description:
- IC REG LIN 1.2V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7331-12SNG-7 from Diodes Incorporated is a fixed-output 1.2V, 300mA low-dropout linear regulator in DFN2020-6 package, featuring 65μA typical quiescent current, 300mV dropout at full load, and fast 80μs startup. It integrates enable control, thermal shutdown, current limiting, and short-circuit protection - designed for space-constrained, battery-powered applications such as wireless LAN cards and notebook computers.
For engineers reviewing the AP7331-12SNG-7 datasheet, AP7331-12SNG-7 pinout, AP7331-12SNG-7 application, or AP7331-12SNG-7 equivalent, key selection criteria include low-IQ operation across 2–6V input, stability with 1μF ceramic output capacitor, fixed 1.2V output accuracy (±2%), and thermal shutdown threshold at 140°C.
Technical Context
The AP7331-12SNG-7 implements a PMOS pass transistor architecture enabling ultra-low dropout (300mV @ 300mA) and minimal quiescent current (65μA typ.) independent of load. Its internal 0.4V bandgap reference and error amplifier deliver precise regulation under fast line/load transients.
Enable logic operates with VIH ≥1.4V and VIL ≤0.4V, supporting direct microcontroller GPIO control. Protection circuitry includes foldback current limiting (400–600mA), short-circuit clamping (~100mA), and thermal shutdown with 15°C hysteresis - all fully integrated without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% over –40°C to +85°C ambient - ensures stable core voltage for low-power MCUs and RF ICs. |
| Max Output Current | 300mA continuous - sufficient for powering single-core processors, Wi-Fi SoCs, or sensor hubs. |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to VIN = 1.5V while maintaining regulated 1.2V output. |
| Quiescent Current | 65μA typical across full load and 2–6V input - extends battery life in always-on IoT endpoints. |
| PSRR | 65dB typical at 100Hz - suppresses ripple from noisy DC/DC converters feeding the LDO input. |
| Startup Time | 80μs typical - supports rapid wake-from-sleep sequences in portable devices. |
| Thermal Shutdown | Triggers at 140°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload. |
Pinout & Package
AP7331-12SNG-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 when marking dot is oriented top-left; exposed thermal pad (Pin 6) must be soldered to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 3) | Input voltage supply | Accepts 2–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for noise suppression. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, EN, and thermal pad; must connect directly to low-impedance ground plane. |
| EN (Pin 1) | Enable control input | Active-high logic interface; drives regulator ON when ≥1.4V, OFF when ≤0.4V; tie to IN if always-on operation required. |
| OUT (Pin 4) | Regulated output | Delivers fixed 1.2V; stable with 1–4.7μF X5R/X7R ceramic capacitor; place capacitor within 2mm of OUT/GND pins. |
| NC (Pins 5,6) | No connection | Pins 5 and 6 are unconnected internally; Pin 6 is the exposed thermal pad - must be soldered to GND for θJA = 167°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Low-IQ operation | 65μA typical across full 0–300mA load range - eliminates need for external disable circuitry in battery-gated systems. |
| Fast transient response | Minimal overshoot/undershoot during 1mA ↔ 300mA load steps - maintains clean supply for high-speed digital logic without added bulk capacitance. |
| Stability with small capacitors | Guaranteed stable with 1μF ceramic output capacitor (ESR 10–200mΩ) - reduces BOM count and PCB area vs. legacy LDOs requiring ≥10μF. |
| Integrated protection | Current limit (400–600mA), short-circuit clamp (~100mA), and thermal shutdown (140°C) - eliminates need for external fault management circuitry. |
| Green packaging | RoHS-compliant, halogen-free molding compound (no Br/Sb) - meets environmental compliance requirements for global consumer electronics. |
Applications
| Wireless LAN Modules | Notebook Computer Subsystems |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz WLAN baseband ICs and RF front-end modules in compact M.2 or mini-PCIe form factors. IC Role / Device Role / Timing Role: Primary 1.2V core supply for IEEE 802.11ac/ax PHY processors with dynamic load switching. Use Value: Fast 80μs startup synchronizes with MAC-layer wake events; 65μA IQ minimizes standby power in sleep-mode beacon intervals. |
Use Scenario: Supplying DDR memory termination voltage (VTT) or auxiliary I/O rails in ultrabook motherboard power trees. IC Role / Device Role / Timing Role: Secondary LDO delivering clean, low-noise 1.2V for memory interface buffers and PCIe clock generators. Use Value: 65dB PSRR at 100Hz rejects switching noise from main buck converters; 300mV dropout enables use with shared 1.5V intermediate bus. |
| Battery-Powered IoT Sensors | XDSL Customer Premises Equipment |
|
Use Scenario: Regulating power for BLE/Wi-Fi MCU subsystems in coin-cell or Li-ion powered edge nodes. IC Role / Device Role / Timing Role: Always-on system rail enabling rapid sensor wake-up and radio transmission bursts. Use Value: Ultra-low 65μA quiescent current extends shelf life of sealed industrial sensors; DFN2020-6 footprint saves >60% board area vs. SOT25. |
Use Scenario: Providing 1.2V bias for ADSL2+/VDSL2 line drivers and analog front-end (AFE) circuits in residential gateways. IC Role / Device Role / Timing Role: Low-noise analog supply isolating sensitive DSL signal paths from digital switching noise. Use Value: Small 1μF output capacitor meets transient demands of line driver current spikes; thermal shutdown protects against overtemperature in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1202E/MB | 250mA max output, 1.6μA IQ, SOT23-5 package, no enable pin | Lacks EN control and thermal shutdown; limited to ultra-low-power sub-100mA loads | Select only when enable functionality and 300mA headroom are unnecessary and IQ < 2μA is mandatory. |
| Torex XC6206P122MR-G | 150mA max output, 1μA IQ, SOT23-5, no current limit or thermal protection | Insufficient current capability and missing fault protections for WLAN or DSL use cases | Use only in non-critical, low-current sensor biasing where cost is primary constraint and reliability features are waived. |
Compared with MCP1700-1202E/MB and XC6206P122MR-G, AP7331-12SNG-7 uniquely delivers 300mA output with integrated EN, thermal shutdown, and current limiting - making it suitable for protected, higher-current applications where reliability and feature completeness outweigh minimal IQ savings.
Availability
AP7331-12SNG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, notebook computer subsystems, battery-powered IoT sensors, and XDSL customer premises equipment requiring stable component supply, RoHS-compliant packaging, and production-ready DFN2020-6 footprint compatibility.
Supply support for AP7331-12SNG-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 industrial, computing, and communications markets.
The AP7331 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered and space-constrained applications demanding high efficiency, fast transient response, and robust fault protection without external components.
FAQ
What is the minimum input voltage required for AP7331-12SNG-7 to maintain 1.2V output at 300mA?
The AP7331-12SNG-7 requires VIN ≥ 1.5V to sustain regulation at full 300mA load, based on its typical 300mV dropout voltage. At lower currents, dropout decreases - e.g., ~100mV at 50mA - allowing operation down to VIN = 1.3V in light-load scenarios. Input must remain ≥2V per recommended operating conditions to ensure specification compliance.
Can AP7331-12SNG-7 operate without an output capacitor?
No. The AP7331-12SNG-7 requires a minimum 1μF ceramic output capacitor (X5R/X7R, ESR 10–200mΩ) between OUT and GND for stability and transient response. Omitting it causes oscillation and potential device failure. Larger values (up to 4.7μF) improve load-step immunity but are not mandatory for basic regulation.
Is the exposed thermal pad (Pin 6) electrically connected or just for thermal conduction?
The exposed thermal pad (Pin 6) is internally connected to GND and must be soldered to a PCB ground plane. It serves both thermal conduction (reducing θJA to 167°C/W) and electrical grounding. Leaving it unconnected degrades thermal performance by >30% and risks instability due to floating ground reference.
Does AP7331-12SNG-7 support reverse current blocking when disabled?
No. The AP7331-12SNG-7 does not include reverse current blocking; when EN = low, the internal PMOS pass device turns off but body diode conduction may allow reverse current from OUT to IN if VOUT > VIN. For reverse-blocking applications, an external Schottky diode in series with IN or a dedicated reverse-protection LDO is required.
AP7331-12SNG-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):
- 1.2V
- 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:
- U-DFN2020-6
AP7331-12SNG-7 FAQ
1.How can I place an order for AP7331-12SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-12SNG-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 AP7331-12SNG-7 reliable?
The price and inventory of AP7331-12SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-12SNG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-12SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-12SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-12SNG-7?
AP7331-12SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-12SNG-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 AP7331-12SNG-7?
For technical support, including AP7331-12SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-12SNG-7 requirements.
6.How does Aetrix verify that AP7331-12SNG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-12SNG-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 AP7331-12SNG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-12SNG-7?
All AP7331-12SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-12SNG-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 AP7331-12SNG-7 part is unused and in its original packaging.
Return procedure for AP7331-12SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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