My Inquiry
My Account
Diodes Incorporated AP7331-15WG-7
- Part No.:
- AP7331-15WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7331-15WG-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7331-15WG-7 from Diodes Incorporated is a fixed-output 1.5V, 300mA low-dropout linear regulator with enable control, 65μA quiescent current, 300mV dropout at full load, and stable operation with 1μF ceramic output capacitor. It serves as a primary power supply for core logic in battery-powered wireless LAN cards and XDSL routers where ultra-low standby power and fast transient response are critical.
For engineers reviewing the AP7331-15WG-7 datasheet, AP7331-15WG-7 pinout, AP7331-15WG-7 application, or AP7331-15WG-7 equivalent, key selection criteria include its 1.5V fixed output accuracy (±2%), EN-pin logic thresholds (VIH = 1.4V, VIL = 0.4V), thermal shutdown at 140°C, and compatibility with low-ESR ceramic capacitors in space-constrained SOT25 packaging.
Technical Context
The AP7331-15WG-7 integrates a PMOS pass transistor, 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 fast start-up (80μs) and excellent load transient response without requiring minimum load.
It operates across 2V–6V input range and delivers regulated 1.5V output with ±2% accuracy over –40°C to +85°C ambient. PSRR reaches 65dB at 100Hz, and line/load regulation are specified at 0.20%/V and ±0.6%, respectively - enabling clean power delivery in noise-sensitive RF baseband circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% over temperature and load - ensures stable core voltage for 1.5V I/O domains in networking SoCs. |
| Max Output Current | 300mA continuous - sufficient to power single-chip Wi-Fi transceivers or DSL PHY cores without derating. |
| Quiescent Current | 65μA typical at full load - minimizes battery drain during idle states in portable gateways. |
| Dropout Voltage | 300mV typical at 300mA - allows operation down to 1.8V input, extending usable battery range in 2-cell alkaline systems. |
| PSRR | 65dB at 100Hz - suppresses low-frequency ripple from switching DC/DC stages upstream of LDO. |
| Start-up Time | 80μs - enables rapid power cycling of peripheral ICs in TDMA-based communication protocols. |
| Thermal Shutdown | Triggers at 140°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 package (3.0mm × 1.7mm × 1.3mm), RoHS-compliant "Green" molding compound, lead-free finish. Pin 1 = IN, Pin 2 = GND, Pin 3 = EN, Pin 4 = NC, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2V–6V; requires ≥1μF ceramic bypass to GND close to pin for stability and noise rejection. |
| GND (Pin 2) | Power ground reference | Common return path for input/output currents; must connect to low-impedance ground plane. |
| EN (Pin 3) | Enable control input | Active-high logic interface; VIH ≥1.4V turns regulator on, VIL ≤0.4V disables output and reduces IQ to 1μA. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating or grounded per layout guidelines - no external tie. |
| OUT (Pin 5) | Regulated output | Delivers 1.5V ±2%; requires ≥1μF ceramic capacitor to GND within 2mm for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65μA at 300mA load - extends battery life in always-on edge devices without sacrificing regulation performance. |
| Fast transient response | Stable 0–300mA load steps with minimal overshoot/undershoot - supports burst-mode operation in GSM/EDGE baseband ICs. |
| Low-ESR capacitor compatibility | Stable with 1–4.7μF X5R/X7R ceramics (10–200mΩ ESR) - eliminates need for bulky tantalum or electrolytic capacitors. |
| Integrated protection suite | Current limit (600mA), short-circuit clamp (100mA), and thermal shutdown (140°C) - enables robust operation without external fault management. |
| Wide input voltage range | 2V–6V operation - accommodates single Li-ion (3.0–4.2V), dual alkaline (2.4–3.2V), or regulated 3.3V/5V rails. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
|
Use Scenario: Powering 1.5V I/O interfaces and RF front-end bias circuits in mini-PCIe Wi-Fi modules. IC Role / Device Role / Timing Role: Primary LDO supplying clean, low-noise 1.5V to WLAN SoC I/O banks and PA bias rails. Use Value: 65μA IQ and 80μs start-up enable rapid sleep/wake cycles compliant with IEEE 802.11 power-save modes. |
Use Scenario: Regulating 1.5V supply for ADSL2+ line driver and analog front-end in residential gateways. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable voltage to DSL PHY analog sections sensitive to supply ripple. Use Value: 65dB PSRR at 100Hz suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Notebook Computers | Battery-Powered Equipment |
|
Use Scenario: Providing 1.5V auxiliary rail for USB 3.0 controller I/O or embedded security module in ultrabooks. IC Role / Device Role / Timing Role: Secondary LDO supporting isolated power domain with independent enable control via system PMIC. Use Value: EN pin logic thresholds (VIH=1.4V) interface directly with 1.8V GPIOs without level-shifting. |
Use Scenario: Powering low-power microcontrollers and sensors in handheld test instruments with AA/AAA battery packs. IC Role / Device Role / Timing Role: Main system regulator converting 2.4–3.2V alkaline stack to precise 1.5V for mixed-signal MCU cores. Use Value: 300mV dropout enables >90% battery utilization down to 1.8V cutoff, maximizing runtime. |
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 | 1.5V fixed, 250mA, 1.8μA IQ, 600mV dropout at 250mA | Lower IQ but lower current rating and higher dropout - unsuitable for 300mA peak loads in Wi-Fi transceivers. | Select only for ultra-low-power sensor nodes where 250mA max load and 600mV dropout are acceptable. |
| TPS7A0515PDBVR | 1.5V fixed, 200mA, 25μA IQ, 175mV dropout at 200mA | Lower dropout and IQ, but rated only to 200mA - cannot support 300mA DSL line driver peaks. | Prefer for compact, low-IQ applications with <200mA steady load; avoid where transient current exceeds 200mA. |
Compared with MCP1700T-1502E/TT and TPS7A0515PDBVR, the AP7331-15WG-7 uniquely balances 300mA capability, 65μA IQ, and 300mV dropout - making it the only option among the three qualified for 1.5V power delivery in full-load wireless and DSL PHY subsystems.
Availability
AP7331-15WG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7331-15WG-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-quiescent-current LDO portfolio, designed specifically for battery-operated networking and portable electronics where extended runtime, fast dynamic response, and small-footprint packaging are mandatory.
FAQ
What is the maximum input voltage for AP7331-15WG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Exceeding 6V risks violating the device's safe operating area, especially under high ambient temperatures or heavy load conditions. Operation above 6V may trigger internal protection or accelerate parametric drift.
Can AP7331-15WG-7 operate without an output capacitor?
No - the AP7331-15WG-7 requires a minimum 1μF ceramic output capacitor connected between OUT and GND for stability and transient response. Omitting it causes oscillation, excessive output ripple, and potential thermal shutdown due to instability-induced power dissipation.
Is the NC pin (Pin 4) required to be grounded?
No - Pin 4 is internally unconnected and must remain floating. Grounding or connecting it to any voltage violates the SOT25 layout specification and may induce leakage paths or parasitic coupling that degrades PSRR and noise performance.
How does thermal shutdown behave under continuous overload?
When junction temperature reaches ~140°C, the output disables and remains off until temperature drops to ~125°C (15°C hysteresis). Under sustained overload, this causes on/off cycling - visible as intermittent output voltage - which limits average power dissipation and prevents permanent damage.
AP7331-15WG-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):
- 1.5V
- 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:
- SOT-25
AP7331-15WG-7 FAQ
1.How can I place an order for AP7331-15WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7331-15WG-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 AP7331-15WG-7 reliable?
The price and inventory of AP7331-15WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7331-15WG-7 is usually 5 days.
3.What payment methods are accepted for AP7331-15WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7331-15WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7331-15WG-7?
AP7331-15WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7331-15WG-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 AP7331-15WG-7?
For technical support, including AP7331-15WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7331-15WG-7 requirements.
6.How does Aetrix verify that AP7331-15WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7331-15WG-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 AP7331-15WG-7 meets industry standards.
7.What is the process for return or replacement of AP7331-15WG-7?
All AP7331-15WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7331-15WG-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 AP7331-15WG-7 part is unused and in its original packaging.
Return procedure for AP7331-15WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7331-15WG-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
