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Diodes Incorporated AP7331-12WG-7
- Part No.:
- AP7331-12WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7331-12WG-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:16,808
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Product details
Overview
AP7331-12WG-7 from Diodes Incorporated is a fixed-output 1.2V, 300mA low-dropout linear regulator in SOT25 package, featuring 65μA typical quiescent current, 300mV dropout at full load, and fast 80μs startup-designed for battery-powered wireless LAN cards and XDSL routers where ultra-low standby power and transient stability are critical.
For engineers reviewing the AP7331-12WG-7 datasheet, AP7331-12WG-7 pinout, AP7331-12WG-7 application, or AP7331-12WG-7 equivalent, key selection criteria include guaranteed 1.2V ±2% output accuracy across –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 AP7331-12WG-7 integrates a PMOS pass transistor, precision 0.4V bandgap reference, error amplifier, and enable-controlled gate driver. Its architecture delivers stable regulation without minimum load and supports fast line/load transients via internal compensation optimized for low-ESR ceramic capacitors.
It implements three independent protection mechanisms: current limit (400–600mA), short-circuit clamp (~100mA), and thermal shutdown with 15°C hysteresis. The EN pin operates with VIH ≥1.4V and VIL ≤0.4V, enabling direct interfacing with 1.8V/3.3V logic without level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% over –40°C to +85°C ambient - ensures reliable core voltage for low-power microcontrollers and RF ICs. |
| Quiescent Current | 65μA typical at 300mA load - enables multi-year battery life in always-on IoT sensors and portable modems. |
| Dropout Voltage | 300mV typical at 300mA - allows operation down to 1.5V input, supporting single-cell LiFePO₄ or dual-cell alkaline systems. |
| PSRR | 65dB at 100Hz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for clean RF supply rails. |
| Start-up Time | 80μs - enables rapid wake-from-standby in TDMA-based GSM baseband circuits without supply rail collapse. |
| Thermal Shutdown | Triggers 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 - accommodates wide-input buck converter outputs and unregulated battery sources across consumer and telecom applications. |
Pinout & Package
SOT25 (5-pin) package: compact 2.9mm × 2.8mm surface-mount outline with exposed thermal pad (not electrically connected), RoHS-compliant lead-free finish, and green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for noise rejection and stability. |
| 2 - GND | Power ground reference | Primary return path for input/output currents; must connect to low-impedance ground plane to minimize noise coupling. |
| 3 - EN | Enable control input | Active-high logic interface; ties to VIN for always-on operation or driven by MCU GPIO for dynamic power gating. |
| 4 - NC | No connection | Internally unconnected; must remain floating-no external tie or pull-up/down required. |
| 5 - OUT | Regulated output | Delivers stable 1.2V; requires ≥1μF ceramic capacitor to GND within 2mm trace length for optimal transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ regulation | 65μA quiescent current maintained across full 0–300mA load range-reduces no-load power loss by >5× vs standard LDOs. |
| Fast transient recovery | Sub-100μs response to 1mA↔300mA load steps-prevents brownout in DSP cores during burst-mode processing. |
| Single-capacitor stability | Stable with 1μF X5R/X7R ceramic output capacitor-eliminates need for bulk electrolytic or tantalum, saving board space and cost. |
| Integrated fault protection | Current limit, short-circuit clamp, and thermal shutdown operate independently-ensures robustness in unattended embedded deployments. |
| Wide input compatibility | 2V–6V input range supports direct connection to Li-ion, LiFePO₄, and multi-cell alkaline batteries without pre-regulation. |
Applications
| Wireless LAN Modules | XDSL Customer Premises Equipment |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz WLAN SoCs (e.g., QCA9377, BCM4356) in USB dongles and residential gateways. IC Role / Device Role / Timing Role: Primary 1.2V core supply for RF transceivers and MAC processors requiring tight voltage tolerance and low noise. Use Value: 65μA IQ extends battery runtime in portable Wi-Fi analyzers; 65dB PSRR isolates WLAN PHY from noisy SMPS-derived 3.3V rails. |
Use Scenario: Regulating 1.2V core voltage for ADSL2+/VDSL2 line card controllers (e.g., Lantiq VRX200, Intel IAD200). IC Role / Device Role / Timing Role: Secondary LDO supplying digital signal processor cores after primary 3.3V buck conversion. Use Value: 300mV dropout enables efficient use of 1.5V intermediate rail; fast transient response maintains timing integrity during DSL handshake bursts. |
| Notebook Platform Subsystems | Battery-Powered Industrial Sensors |
|
Use Scenario: Powering always-on microcontrollers (e.g., STM32L4, nRF52840) in laptop EC/keyboard controllers and lid-open detection circuits. IC Role / Device Role / Timing Role: Standby power source maintaining real-time clock, wake logic, and sensor interfaces during S3/S4 sleep states. Use Value: 80μs startup synchronizes with chipset wake signals; ±2% output accuracy ensures reliable brown-out detection thresholds. |
Use Scenario: Supplying 1.2V to ultra-low-power ADCs (e.g., ADS1220), LoRa transceivers (SX1276), and MEMS accelerometers in field-deployed nodes. IC Role / Device Role / Timing Role: Primary regulated rail for mixed-signal sensing chains operating from coin-cell or energy-harvesting sources. Use Value: 2V min input supports direct connection to single CR2032 (2.0–3.0V); thermal shutdown prevents failure in sealed enclosures. |
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 |
|---|---|---|---|
| MCP1700-1202E/TO | 250mA rating, 1.8μA IQ, SOT23-3 package - lower current capacity and no EN pin. | Limited to sub-200mA loads; unsuitable for 300mA peak bursts in WLAN baseband. | Select only for space-constrained, ultra-low-IQ designs where 250mA headroom suffices and enable control is unnecessary. |
| Torex XC6206P122MR-G | 150mA rating, 1.0μA IQ, SOT23-5 - lacks thermal shutdown and has higher 400mV dropout at 150mA. | Insufficient current for DSL line card processors; thermal protection gap increases field failure risk. | Consider only for static, low-power sensor nodes where thermal margin is guaranteed and 150mA load ceiling is acceptable. |
Compared with MCP1700-1202E/TO and XC6206P122MR-G, the AP7331-12WG-7 uniquely balances 300mA delivery, 65μA IQ, integrated EN, and full fault protection-making it the only option qualified for thermally demanding, burst-loaded telecom subsystems.
Availability
AP7331-12WG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL customer premises equipment, and notebook platform subsystems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP7331-12WG-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-noise, low-IQ LDO product line-engineered specifically for battery-sensitive applications demanding fast transient response, minimal footprint, and robust fault handling without external components.
FAQ
What is the maximum input voltage for AP7331-12WG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2.0V to 6.0V. Exceeding 6.0V risks violating the device's safe operating area, especially under high ambient temperatures or heavy load conditions. Operation at 7V is only permissible for brief transients per the Absolute Maximum Ratings table.
Can AP7331-12WG-7 operate without an output capacitor?
No. An output capacitor of at least 1μF ceramic (X5R/X7R) is mandatory for stability and transient performance. Omitting it causes oscillation, excessive overshoot/undershoot during load steps, and potential damage due to uncontrolled output voltage excursions-per the Application Note section on Output Capacitor requirements.
Is the NC pin on AP7331-12WG-7 required to be grounded or left floating?
The NC (pin 4) is internally unconnected and must remain floating-no external connection, pull-up, or pull-down is permitted. Connecting it risks internal leakage paths or latch-up, as confirmed in the Pin Descriptions table and Package Outline documentation for SOT25 variants.
Does AP7331-12WG-7 support adjustable output voltages?
No. AP7331-12WG-7 is a fixed 1.2V output variant. Adjustable versions (e.g., AP7331-ADJ) use different marking codes and pinouts (ADJ pin instead of NC). This part lacks the ADJ terminal and internal feedback divider, so external resistor networks cannot modify its output voltage.
AP7331-12WG-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):
- 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:
- SOT-25
AP7331-12WG-7 FAQ
1.How can I place an order for AP7331-12WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-12WG-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 AP7331-12WG-7 reliable?
The price and inventory of AP7331-12WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-12WG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-12WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-12WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-12WG-7?
AP7331-12WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-12WG-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 AP7331-12WG-7?
For technical support, including AP7331-12WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-12WG-7 requirements.
6.How does Aetrix verify that AP7331-12WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-12WG-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 AP7331-12WG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-12WG-7?
All AP7331-12WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-12WG-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 AP7331-12WG-7 part is unused and in its original packaging.
Return procedure for AP7331-12WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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