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Diodes Incorporated AP7331-15SNG-7
- Part No.:
- AP7331-15SNG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7331-15SNG-7.pdf
- Description:
- IC REG LIN 1.5V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
AP7331-15SNG-7 from Diodes Incorporated is a fixed-output 1.5V, 300mA low-dropout linear regulator in DFN2020-6 package, featuring 65μA typical quiescent current, 300mV typical dropout at full load, and fast 80μs startup time. It integrates enable control, thermal shutdown, current limiting, and short-circuit protection - designed for power management in space-constrained, battery-powered systems such as wireless LAN cards and portable computing peripherals.
For engineers reviewing the AP7331-15SNG-7 datasheet, AP7331-15SNG-7 pinout, AP7331-15SNG-7 application, or AP7331-15SNG-7 equivalent, key selection criteria include its ultra-low IQ across 2–6V input range, stability with 1μF ceramic output capacitor, ±2% output voltage accuracy over –40°C to +85°C, and compatibility with high-transient-load DSP/GSM baseband circuits.
Technical Context
The AP7331-15SNG-7 implements a PMOS pass transistor architecture enabling low dropout and minimal quiescent current across load and input voltage variations. Its internal 0.4V bandgap reference and error amplifier deliver precise regulation without external components for fixed-output variants.
Enable logic operates with VIH ≥ 1.4V and VIL ≤ 0.4V, supporting direct microcontroller GPIO interfacing. Protection circuitry includes thermal shutdown at 140°C (15°C hysteresis), current limit at 400–600mA, and short-circuit clamp at ~100mA - all fully integrated with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% over –40°C to +85°C - ensures stable core supply for low-voltage I/O or memory interfaces. |
| Max Output Current | 300mA continuous - supports single-rail powering of RF transceivers or microcontroller peripherals. |
| Quiescent Current | 65μA typical at 300mA load - extends battery life in always-on sensor nodes or standby-mode communication modules. |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to VIN = 1.8V while maintaining regulated 1.5V output. |
| PSRR | 65dB typical at 100Hz - suppresses ripple from noisy DC-DC converters feeding the LDO input. |
| Start-up Time | 80μs - allows rapid wake-up from deep-sleep states in portable devices without voltage droop. |
| Thermal Shutdown | Triggers at 140°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
AP7331-15SNG-7 uses the DFN2020-6 (2.0mm × 2.0mm, 0.65mm pitch) package with wettable flank leads for automated optical inspection. Thermal pad on underside improves heat dissipation; recommended pad layout per Diodes AP02001.
| 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 rejection and stability. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, EN, and thermal pad; must connect to low-impedance ground plane. |
| EN (Pin 1) | Enable control input | Active-high logic interface; ties to MCU GPIO or pull-up resistor; disables regulator when <0.4V. |
| OUT (Pin 4) | Regulated output | Delivers fixed 1.5V; requires ≥1μF ceramic capacitor to GND within 2mm for transient response and stability. |
| NC (Pins 5,6) | No connection | Unbonded terminals; must remain unconnected and unpopulated on PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65μA at full 300mA load - enables >1-year battery life in coin-cell–powered IoT endpoints. |
| Fast transient response | Stable under 0→300mA load steps with minimal overshoot/undershoot - critical for GSM/TDMA burst-mode loads. |
| Single-capacitor stability | Works with 1μF X7R/X5R ceramic output capacitor - reduces BOM count and board area vs. traditional LDOs. |
| Integrated protection suite | 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 - meets environmental compliance requirements for global consumer electronics. |
Applications
| Wireless LAN Modules | XDSL Router Power Rails |
|---|---|
|
Use Scenario: Powering 2.4GHz WLAN baseband ICs and RF front-end bias rails in compact residential gateways. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying digital core logic and analog PHY blocks with tight voltage tolerance. Use Value: Low 65μA IQ minimizes standby power draw; 80μs startup synchronizes cleanly with MAC-layer wake events. |
Use Scenario: Generating clean 1.5V supply for DSL line driver DACs and analog front-end circuitry. IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switching noise via 65dB PSRR at 100Hz. Use Value: Stable output under dynamic line-load transients prevents data corruption in ADSL2+ symbol decoding. |
| Notebook Subsystem Power | Portable Medical Sensors |
|
Use Scenario: Supplying 1.5V to embedded controller (EC) or touchpad ASIC in ultrabook platforms. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and keyboard scan functions during S3/S4 sleep. Use Value: 300mV dropout allows operation from shared 1.8V rail, reducing need for additional intermediate regulators. |
Use Scenario: Powering low-noise signal chain (ADC, op-amps, sensor interface) in handheld ECG or pulse oximeters. IC Role / Device Role / Timing Role: Precision analog supply isolating sensitive analog circuitry from digital noise sources. Use Value: Minimal output voltage variation (<±0.6% load regulation) ensures consistent ADC reference scaling and measurement repeatability. |
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-1502E/TT | 250mA max output, 1.8μA IQ, SOT23-5 package - lower current, far lower quiescent current, but higher dropout (600mV @250mA). | Better for micropower sensor nodes; unsuitable for 300mA peak loads like WLAN bursts. | Select when IQ <2μA is mandatory and load never exceeds 250mA. |
| Torex XC6206P152MR-G | 300mA, 1.0μA IQ, SOT23-5 - ultra-low IQ but only 200mV PSRR at 100Hz and no enable pin. | Lacks EN control and noise rejection capability; requires external enable circuitry for sequencing. | Choose only for static, non-sequenced, ultra-low-power applications where PSRR and enable are not required. |
Compared with MCP1700T-1502E/TT and XC6206P152MR-G, AP7331-15SNG-7 uniquely balances 300mA drive, 65μA IQ, 65dB PSRR, and integrated EN - making it optimal for dynamically loaded, space-constrained, battery-operated systems requiring both efficiency and noise immunity.
Availability
AP7331-15SNG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL router subsystems, and portable medical sensors requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant green packaging.
Supply support for AP7331-15SNG-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 series targets portable and battery-powered applications demanding ultra-low IQ, fast transient response, and small-footprint integration - delivering robust, single-chip power regulation without external compensation.
FAQ
What is the minimum input voltage required for AP7331-15SNG-7 to maintain regulation at 300mA?
The device requires VIN ≥ VOUT + VDROP = 1.5V + 0.3V = 1.8V minimum under full load. At lighter loads, dropout decreases - e.g., ~100mV at 10mA - allowing operation down to 1.6V input in standby mode. Absolute minimum VIN is 2.0V per recommended operating conditions.
Can AP7331-15SNG-7 be used without an input capacitor?
No. A minimum 1μF ceramic capacitor between IN and GND is mandatory for stability and input noise suppression. Omitting it risks oscillation, poor transient response, and potential damage from supply glitches. The capacitor must be placed within 2mm of the IN and GND pins using short, wide traces.
Does AP7331-15SNG-7 require a minimum load current to remain stable?
No. The regulator remains stable and fully regulated with zero load current. This is confirmed in the datasheet Application Note: "No minimum load is required to keep the device stable." It maintains regulation from 0mA to 300mA without external compensation or preload resistors.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches ~140°C, the output shuts off. After cooling to ~125°C (15°C hysteresis), regulation resumes automatically. Under continuous overload, this causes controlled on/off cycling - limiting average power dissipation and preventing permanent damage, though system-level thermal design should avoid sustained triggering.
AP7331-15SNG-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):
- 1.5V
- 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
AP7331-15SNG-7 FAQ
1.How can I place an order for AP7331-15SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-15SNG-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 AP7331-15SNG-7 reliable?
The price and inventory of AP7331-15SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-15SNG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-15SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-15SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-15SNG-7?
AP7331-15SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-15SNG-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 AP7331-15SNG-7?
For technical support, including AP7331-15SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-15SNG-7 requirements.
6.How does Aetrix verify that AP7331-15SNG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-15SNG-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 AP7331-15SNG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-15SNG-7?
All AP7331-15SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-15SNG-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 AP7331-15SNG-7 part is unused and in its original packaging.
Return procedure for AP7331-15SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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