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Diodes Incorporated AP131-15WG-7
- Part No.:
- AP131-15WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP131-15WG-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
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Product details
Overview
AP131-15WG-7 from Diodes Incorporated is a 300mA, fixed 1.5V output, low dropout linear regulator in SOT25 package. It features 400mV dropout at full load, 50µA quiescent current, ±2% output accuracy, and active-low enable control via EN pin. Designed for battery-powered devices requiring stable low-voltage supply with fast transient response and thermal/overcurrent protection.
For engineers reviewing the AP131-15WG-7 datasheet, AP131-15WG-7 pinout, AP131-15WG-7 application, or AP131-15WG-7 equivalent, key selection criteria include dropout voltage at 300mA, shutdown current (<5µA), BP pin noise-reduction capability, and SOT25 thermal resistance (163°C/W) for ambient-limited designs.
Technical Context
The AP131-15WG-7 integrates a PMOS pass element (RON = 1.5Ω), bandgap reference, error amplifier, and protection circuitry including fold-back current limiting and thermal shutdown. Its internal architecture enables stable regulation across 2.7–5.5V input while maintaining low ground current under light loads.
Enable functionality is implemented as an active-low logic input (VENOFF ≤ 0.8V), with 8µs typical enable delay when BP capacitor = 0.1µF. PSRR reaches 60dB at 100Hz, and output voltage temperature coefficient is guaranteed ≤150ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% - ensures precise core voltage for low-power microcontrollers and sensors |
| Max Output Current | 300mA - supports moderate-current peripherals without external boost stages |
| Dropout Voltage | 400mV typ. at 300mA - enables operation down to 1.9V input for single-cell Li-ion or two-cell alkaline systems |
| Quiescent Current | 50µA typ. - minimizes standby power loss in always-on battery applications |
| Shutdown Current | <5µA - extends shelf life and runtime in deep-sleep modes |
| PSRR | 60dB @ 100Hz - suppresses ripple from switching DC-DC stages upstream |
| Thermal Resistance θJA | 163°C/W - defines maximum power dissipation (250mW at TA = 25°C) before thermal shutdown |
Pinout & Package
SOT25 (5-pin, lead-free, halogen-free "Green" package) with 1.6mm × 2.8mm footprint and 0.95mm height. Thermal pad not present; standard FR-4 layout per Diodes Inc. outline drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input voltage supply | Accepts 2.7–5.5V; requires ≥1µF ceramic input capacitor for stability |
| 2: EN | Active-low enable control | Pull high ≥1.5V to activate regulator; pull ≤0.8V to enter ultra-low-IQ shutdown |
| 3: BP | Bandgap bypass | 0.1µF capacitor reduces output noise and improves PSRR above 10kHz |
| 4: OUT | Regulated output | Delivers 1.5V ±2% with ≤35mV load regulation across 1–300mA |
| 5: GND | Power and signal reference | Common return for IN, OUT, EN, and BP; must be low-impedance plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout with PMOS pass device | RON = 1.5Ω enables 400mV dropout at 300mA without base drive current |
| Bandgap bypass (BP) pin | External 0.1µF capacitor lowers output noise floor and enhances high-frequency PSRR |
| Fold-back current limiting | Short-circuit current drops to 150–300mA to limit power dissipation during fault |
| Thermal shutdown with hysteresis | Activates at TJ ≈ 150°C and releases ~15°C below, preventing cycling in overload |
| Lead-free & Green compliance | No Br/Sb; <900ppm Br, <900ppm Cl, <1000ppm Sb - meets RoHS 3 and JEDEC JS709C |
Applications
| Wireless Sensor Node | USB Peripheral Power |
|---|---|
Use Scenario: Sub-1GHz or BLE sensor node powered by coin cell or single Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying RF transceiver and ultra-low-power MCU core. Use Value: 50µA quiescent current extends battery life >5 years in sleep mode; 400mV dropout allows operation until battery reaches 1.9V. | Use Scenario: USB-powered card reader or HID device with internal 1.5V logic rail. IC Role / Device Role / Timing Role: Post-regulator converting 3.3V USB VBUS-derived supply to clean 1.5V for interface ICs. Use Value: 60dB PSRR rejects USB switcher noise; BP pin filtering ensures jitter-free clock domain operation. |
| Industrial Control I/O Module | Portable Medical Monitor |
Use Scenario: DIN-rail mounted PLC I/O module with isolated 1.5V digital logic supply. IC Role / Device Role / Timing Role: Local regulation for optocoupler drivers and level-shifters in isolated domains. Use Value: Thermal shutdown prevents latch-up during shorted outputs; ±2% accuracy maintains logic threshold margins over temperature. | Use Scenario: Handheld pulse oximeter using single-cell Li-ion with continuous 1.5V analog front-end supply. IC Role / Device Role / Timing Role: Low-noise bias source for ADC reference buffer and op-amp signal chain. Use Value: BP capacitor reduces integrated output noise to <10µVRMS; 150ppm/°C tempco avoids calibration drift across 0–50°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343-15SAG-7 | Higher 500mA rating, 350mV dropout at 500mA, no BP pin | Lacks BP noise filtering; better suited for higher-current loads without ultra-low-noise requirement | Select when >300mA load or smaller dropout margin is needed; avoid if BP-based noise reduction is critical |
| MCP1700T-1502E/TT | 250mA max, 600mV dropout at 250mA, 1.6µA quiescent current | Lower IQ but lower current capability and higher dropout; SOT23-5 package | Prefer for ultra-low-power, sub-250mA applications where 600mV dropout is acceptable |
Compared with AP7343-15SAG-7 and MCP1700T-1502E/TT, the AP131-15WG-7 uniquely balances 300mA delivery, 400mV dropout, 50µA IQ, and BP-enabled noise control-making it optimal for battery-powered analog/digital mixed-signal systems needing regulated 1.5V with design margin.
Availability
AP131-15WG-7 is available at Aetrix Electronics and suitable for wireless sensor nodes, USB peripheral power rails, industrial I/O modules, and portable medical monitors requiring stable component supply with RoHS 3 and halogen-free compliance.
Supply support for AP131-15WG-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The AP131 series belongs to Diodes' precision LDO portfolio, engineered specifically for space-constrained, battery-sensitive applications demanding low dropout, ultra-low quiescent current, and robust fault protection.
FAQ
What is the minimum input voltage required for AP131-15WG-7 to regulate 1.5V output at 300mA?
The minimum input voltage is 1.9V, calculated as VOUT + VDROP = 1.5V + 0.4V. Below this, regulation fails and output voltage drops linearly with input. The device operates down to 2.7V input per recommended conditions, ensuring margin across temperature and tolerance.
Can the BP pin be left unconnected, and what is its impact on performance?
Yes, the BP pin may be left floating or tied directly to OUT, but doing so forfeits high-frequency PSRR improvement and increases output noise above 10kHz. With 0.1µF to GND, integrated noise drops by ~40%, and PSRR improves by 10–15dB above 100kHz-critical for ADC reference or RF bias applications.
How does the AP131-15WG-7 behave during thermal shutdown, and is recovery automatic?
When junction temperature exceeds ~150°C, internal thermal shutdown disables the pass transistor, dropping OUT to near 0V. Recovery occurs automatically once TJ falls ~15°C below trip point (~135°C), with no external reset required. Hysteresis prevents oscillation during sustained overload.
Is AP131-15WG-7 compatible with ceramic output capacitors, and what is the minimum recommended value?
Yes, it is fully stable with ceramic output capacitors. Minimum recommended COUT is 10µF (X5R/X7R), as specified in the datasheet for load regulation and transient response. Lower values degrade load step recovery and increase output deviation beyond ±2% under dynamic load changes.
AP131-15WG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP131-15WG-7 FAQ
1.How can I place an order for AP131-15WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP131-15WG-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 AP131-15WG-7 reliable?
The price and inventory of AP131-15WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP131-15WG-7 is usually 5 days.
3.What payment methods are accepted for AP131-15WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP131-15WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP131-15WG-7?
AP131-15WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP131-15WG-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 AP131-15WG-7?
For technical support, including AP131-15WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP131-15WG-7 requirements.
6.How does Aetrix verify that AP131-15WG-7 is sourced from the original manufacturer or authorized distributors?
All AP131-15WG-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 AP131-15WG-7 meets industry standards.
7.What is the process for return or replacement of AP131-15WG-7?
All AP131-15WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP131-15WG-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 AP131-15WG-7 part is unused and in its original packaging.
Return procedure for AP131-15WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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