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Diodes Incorporated AP7115-35WG-7
- Part No.:
- AP7115-35WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7115-35WG-7.pdf
- Description:
- IC REG LINEAR 3.5V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
AP7115-35WG-7 from Diodes Incorporated is a 150mA fixed-output (3.5V) low-dropout linear regulator with shutdown control, designed for power management in space-constrained battery-powered systems. It delivers 200mV dropout at full load, draws only 50µA quiescent current, and integrates thermal shutdown, current limiting, and ±2% output voltage accuracy.
For engineers reviewing the AP7115-35WG-7 datasheet, AP7115-35WG-7 pinout, AP7115-35WG-7 application, or AP7115-35WG-7 equivalent, key selection criteria include dropout performance under 150mA load, EN-controlled enable/disable sequencing, BP-pin noise reduction capability, and SOT25 package thermal resistance (θJA = 200°C/W).
Technical Context
The AP7115-35WG-7 uses a PMOS pass element with internal bandgap reference and error amplifier to regulate output voltage. Its enable (EN) pin provides logic-level on/off control, while the BP (bandgap bypass) pin accepts a 0.1µF capacitor to reduce output voltage noise by stabilizing the reference.
Protection circuitry includes foldback current limiting (250mA typ.), short-circuit tolerance, and thermal shutdown activation at +155°C with 30°C hysteresis. The device operates across 2.5V–5.5V input range and maintains regulation down to 200mV headroom at 150mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.5V ±2% - ensures stable rail for 3.3V-tolerant I/O or low-voltage microcontrollers |
| Dropout Voltage | 200mV @ 150mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline |
| Quiescent Current | 50µA typ. - extends battery life in always-on sensor nodes or standby modes |
| PSRR | 70dB @ 1kHz - suppresses switching noise from upstream DC/DC converters |
| Thermal Shutdown | Activates at +155°C, resets at +125°C - prevents permanent damage during sustained overload |
| EN Pin Threshold | VIH = 2.0V, VIL = 0.7V - compatible with 1.8V/3.3V GPIO without level-shifting |
| Output Noise | 50µVrms (10Hz–100kHz) - suitable for analog sensors and RF front-end biasing |
Pinout & Package
SOT25 (5-pin) surface-mount package with exposed pad for thermal enhancement; JEDEC-compliant footprint, RoHS-compliant "Green" molding compound, lead-free terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input voltage supply | Accepts 2.5V–5.5V; requires 1µF ceramic decoupling to GND |
| 2 GND | Power ground reference | Common return path for input/output currents and BP capacitor |
| 3 EN | Enable control input | Active-high logic; drives high to enable regulator, low to enter <1µA shutdown mode |
| 4 BP | Bandgap reference bypass | Connects 0.1µF ceramic capacitor to GND to reduce output voltage noise and improve stability |
| 5 OUT | Regulated output | Delivers 3.5V ±2% at up to 150mA; requires ≥1µF ceramic output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout architecture | 200mV @ 150mA enables use with marginal input headroom in portable designs |
| EN-controlled shutdown | Reduces total system current to ≤1µA, supporting deep-sleep power states |
| BP-pin noise filtering | 0.1µF bypass lowers output noise floor to 50µVrms for precision analog rails |
| Integrated protection | Current limit (250mA), thermal shutdown (+155°C), and short-circuit survival prevent field failures |
| Stable with small ceramics | Works with ≥1µF X7R/X5R output capacitors; ESR <1Ω required for stability per load current |
Applications
| Wireless Sensor Node | GSM/GPRS Handset Baseband |
|---|---|
|
Use Scenario: Powering ultra-low-power MCU, BLE radio, and environmental sensors from coin cell or Li-ion. IC Role / Device Role / Timing Role: Primary LDO supplying 3.5V to RF transceiver and ADC reference. Use Value: 50µA quiescent current extends shelf life; 200mV dropout preserves runtime as battery discharges to 3.0V. |
Use Scenario: Providing clean 3.5V rail to baseband processor and audio codec in dual-SIM mobile handsets. IC Role / Device Role / Timing Role: Post-regulator after buck converter, delivering low-noise supply for sensitive analog blocks. Use Value: 70dB PSRR attenuates switching ripple; BP bypass reduces phase noise impact on RF transmit performance. |
| Notebook USB Peripheral | Industrial Handheld Scanner |
|
Use Scenario: Powering USB-to-serial bridge IC and EEPROM in compact dongles or docking accessories. IC Role / Device Role / Timing Role: Local LDO converting 5V USB bus to 3.5V logic supply. Use Value: SOT25 footprint minimizes PCB area; EN pin allows host-controlled power gating during USB suspend. |
Use Scenario: Supplying barcode imager module and touch controller in ruggedized handheld scanners. IC Role / Device Role / Timing Role: Main system LDO enabling fast wake-from-sleep via EN signal synchronized to trigger event. Use Value: Thermal shutdown protects against ambient +85°C operation with limited airflow; ±2% accuracy ensures consistent sensor calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7315-35SAG-7 | Successor part; lower IQ (2.5µA), improved PSRR (75dB), same 3.5V output and SOT25 package | Designed for new designs requiring longer battery life and higher noise immunity | Select when upgrading legacy designs or launching new products where ultra-low IQ is critical |
| MCP1703T-3502E/MB | Microchip part; 250mA output, 600mV dropout @ 250mA, higher quiescent current (4µA) | Higher current capability but larger dropout limits use with weak batteries | Prefer when >150mA load current or wider input range (up to 16V) is required |
Compared with AP7115-35WG-7, AP7315-35SAG-7 offers 20× lower quiescent current and better noise rejection-ideal for next-gen wearables-while MCP1703T-3502E/MB trades dropout performance for higher output current and input voltage tolerance, fitting industrial controllers needing robustness over battery life.
Availability
AP7115-35WG-7 is available at Aetrix Electronics and suitable for wireless sensor nodes, GSM/GPRS handset subsystems, and notebook USB peripherals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7115-35WG-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 consumer, industrial, and automotive markets.
The AP7115 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered portable electronics where minimal standby power and tight output regulation are essential.
FAQ
What is the minimum input voltage required for AP7115-35WG-7 to maintain regulation at 150mA load?
The AP7115-35WG-7 requires VIN ≥ VOUT + VDO = 3.5V + 0.2V = 3.7V to sustain 150mA output current. Below this, output voltage drops linearly with input; the absolute minimum operating VIN is 2.5V, but regulation is only guaranteed above 3.7V at full load.
Can the EN pin be left unconnected if shutdown functionality is not needed?
No-EN must be tied directly to VIN to ensure reliable turn-on. Floating EN may cause erratic startup or oscillation due to noise coupling; the datasheet explicitly states that unused EN pins should be connected to VIN via a direct trace or low-impedance path.
Is a capacitor required on the BP pin, and what happens if it is omitted?
Yes-a 0.1µF ceramic capacitor between BP and GND is mandatory for optimal noise performance and loop stability. Omitting it increases output voltage noise by up to 3× and may degrade transient response, especially under dynamic load conditions typical in digital I/O rails.
How does thermal shutdown behave during continuous overload, and can the device self-recover?
When junction temperature exceeds +155°C, thermal shutdown disables the pass transistor. Recovery occurs automatically once TJ falls below +125°C (30°C hysteresis). This cycle repeats under sustained overload, preventing permanent damage but limiting average output current in poorly heatsinked layouts.
AP7115-35WG-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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- 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
AP7115-35WG-7 FAQ
1.How can I place an order for AP7115-35WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7115-35WG-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 AP7115-35WG-7 reliable?
The price and inventory of AP7115-35WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7115-35WG-7 is usually 5 days.
3.What payment methods are accepted for AP7115-35WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7115-35WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7115-35WG-7?
AP7115-35WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7115-35WG-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 AP7115-35WG-7?
For technical support, including AP7115-35WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7115-35WG-7 requirements.
6.How does Aetrix verify that AP7115-35WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7115-35WG-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 AP7115-35WG-7 meets industry standards.
7.What is the process for return or replacement of AP7115-35WG-7?
All AP7115-35WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7115-35WG-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 AP7115-35WG-7 part is unused and in its original packaging.
Return procedure for AP7115-35WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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