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Diodes Incorporated AP7115-18WG-7
- Part No.:
- AP7115-18WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7115-18WG-7.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,577
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Product details
Overview
AP7115-18WG-7 from Diodes Incorporated is a 150mA fixed-output (1.8V) low-dropout linear regulator in SOT25 package, featuring 200mV dropout at full load, ±2% output accuracy, and 50µA quiescent current. It integrates current-limit, thermal shutdown, and enable control, making it suitable for battery-powered handheld devices requiring stable low-voltage rail generation.
For engineers reviewing the AP7115-18WG-7 datasheet, AP7115-18WG-7 pinout, AP7115-18WG-7 application, or AP7115-18WG-7 equivalent, key selection criteria include dropout voltage under 150mA load, EN-controlled power sequencing, BP-bypass noise reduction capability, and thermal performance in compact SOT25 layout.
Technical Context
The AP7115-18WG-7 uses a PMOS pass element with bandgap reference and error amplifier feedback to regulate output voltage. Its enable input (EN) provides active-high logic control, while the BP pin accepts a 0.1µF capacitor to suppress bandgap noise and improve output voltage stability.
Thermal shutdown activates at +155°C junction temperature with 30°C hysteresis, and current limit is internally set to ~250mA (typ.) independent of input voltage. PSRR reaches 70dB at 1kHz, supporting clean power delivery in RF-sensitive wireless modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures precise core voltage for 1.8V I/O or low-power microcontrollers. |
| Dropout Voltage | 200mV (typ.) at 150mA - enables operation down to VIN = 2.0V, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Quiescent Current | 50µA (typ.) - minimizes standby power loss in always-on sensor nodes or sleep-mode peripherals. |
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to USB, Li-ion, or regulated 3.3V/5V rails without pre-regulation. |
| PSRR | 70dB at 1kHz - attenuates switching noise from upstream DC-DC converters feeding mixed-signal circuits. |
| Thermal Shutdown | Activates at +155°C with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Current Limit | 250mA (typ.) - protects against short-circuit faults while allowing safe inrush into 1µF ceramic output capacitors. |
Pinout & Package
SOT25 (5-pin, 2.8mm × 2.9mm × 1.3mm) surface-mount package with exposed pad not electrically connected; RoHS-compliant, halogen-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Voltage Input | Primary power entry point; requires ≥1µF ceramic capacitor to GND for stability and ESD filtering. |
| 2 GND | Ground Reference | Common return path for input/output currents and internal bandgap reference; must connect to low-impedance ground plane. |
| 3 EN | Enable Control | Active-high digital input; drives regulator ON when ≥2.0V, OFF when ≤0.7V; leakage <0.1µA enables direct MCU GPIO control. |
| 4 BP | Bandgap Bypass | Connects to 0.1µF ceramic capacitor to GND; reduces output voltage noise by stabilizing internal reference node. |
| 5 OUT | Voltage Output | Regulated 1.8V source; supports ≥1µF ceramic output capacitance with ESR <1Ω for transient response and loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | 200mV @ 150mA enables use with input as low as 2.0V - critical for single-cell battery longevity. |
| Enable-Controlled Power Sequencing | EN pin allows synchronized startup/shutdown with system controllers - eliminates uncontrolled power-rail ramping. |
| Bandgap Bypass (BP) Pin | 0.1µF capacitor reduces output noise to 50µVrms (10Hz–100kHz) - improves ADC reference stability and RF receiver SNR. |
| Integrated Protection | Current limit + thermal shutdown + short-circuit tolerance prevent field failures without external circuitry. |
| Ultra-Low Quiescent Current | 50µA typical draws <1.5µW from 3V supply - extends shelf life in battery-backed real-time clocks and IoT sensors. |
Applications
| Wireless Communication Modules | GSM/GPRS Handsets |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in compact cellular modules. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying noise-sensitive analog sections and digital I/O interfaces. Use Value: 70dB PSRR rejects switching noise from adjacent DC-DC converters; BP bypass lowers phase noise impact on TX spectral purity. |
Use Scenario: Generating stable 1.8V supply for SIM card interface, display driver, and audio codec in dual-SIM feature phones. IC Role / Device Role / Timing Role: Secondary LDO delivering regulated rail independent of main PMIC, enabling selective subsystem power gating. Use Value: EN pin allows modem firmware to disable unused peripherals during deep sleep, reducing system-wide quiescent current by >10µA. |
| Battery-Powered Wearables | PC Peripheral Cards |
|
Use Scenario: Supplying BLE SoC core voltage and sensor interface in coin-cell–powered fitness trackers. IC Role / Device Role / Timing Role: Low-IQ LDO maintaining 1.8V rail during 95% duty-cycle sleep states with fast wake-up response. Use Value: 50µA IQ extends CR2032 battery life beyond 12 months; 200mV dropout preserves usable voltage down to 2.0V cell end-of-life. |
Use Scenario: Providing clean 1.8V for USB 3.0 PHY termination and PCIe Gen1 SerDes receivers on add-in LAN or storage cards. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling high-speed serial links from noisy motherboard power planes. Use Value: 1µF output capacitor compatibility simplifies layout; ±2% accuracy ensures compliance with USB 3.0 VDDIO tolerance (1.71–1.89V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7315-18SG-7 | Successor device with improved 30µA IQ, lower 150mV dropout, and same SOT25 footprint. | Designed for new designs; offers longer battery life and wider VIN margin but requires updated layout review for BP pin usage. | Select AP7315-18SG-7 for new projects needing lower IQ and enhanced thermal performance; AP7115-18WG-7 remains viable for legacy BOM continuity. |
| MCP1700T-1802E/TT | Microchip 150mA LDO with 2.5µA IQ, 600mV dropout at 150mA, and no BP pin. | Lacks BP noise-reduction capability; better suited for ultra-low-power sleep modes than RF-noise-critical paths. | Choose MCP1700T-1802E/TT only where sub-µA standby dominates over RF performance; verify PSRR (55dB @ 1kHz) meets system noise floor. |
Compared with AP7315-18SG-7, AP7115-18WG-7 trades higher IQ and dropout for proven field reliability and identical pinout compatibility; versus MCP1700T-1802E/TT, it delivers superior noise rejection and thermal robustness at the cost of higher static current.
Availability
AP7115-18WG-7 is available at Aetrix Electronics and suitable for wireless communication modules, GSM/GPRS handsets, and battery-powered wearables requiring stable component supply across extended production lifecycles.
Supply support for AP7115-18WG-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7115 belongs to Diodes' low-quiescent-current LDO product line, designed specifically for space-constrained, battery-operated devices demanding high accuracy, low noise, and robust fault protection without external components.
FAQ
What is the minimum input voltage required for AP7115-18WG-7 to maintain regulation at 150mA load?
The minimum input voltage is calculated as VOUT + VDO = 1.8V + 0.2V = 2.0V. However, the absolute minimum specified operating input is 2.5V per datasheet conditions. Below 2.5V, regulation is not guaranteed due to internal reference and error amplifier headroom limitations - design margin requires VIN ≥ 2.5V for full 150mA output compliance.
Can the EN pin be left unconnected if shutdown functionality is not needed?
No - the EN pin must be tied directly to VIN to ensure reliable turn-on. Leaving EN floating risks indeterminate logic state due to internal leakage paths, potentially causing intermittent startup failure or unintended shutdown. A 100kΩ pull-up to VIN is acceptable but direct connection is preferred for lowest risk.
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 required to stabilize the internal bandgap reference. Omitting it increases output voltage noise by up to 3× (to ~150µVrms), degrades load transient response, and may cause instability under rapid load steps - particularly detrimental in RF or precision analog applications.
How does thermal shutdown behave during continuous short-circuit events?
Under sustained short-circuit, the device cycles between ON and OFF states: thermal shutdown triggers at +155°C junction temperature, turning off the pass element; after cooling by ~30°C (to ~125°C), it automatically resumes regulation. This hiccup mode prevents permanent damage but causes output voltage oscillation - external current limiting is recommended for mission-critical short-circuit immunity.
AP7115-18WG-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):
- 1.8V
- 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
AP7115-18WG-7 FAQ
1.How can I place an order for AP7115-18WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7115-18WG-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 AP7115-18WG-7 reliable?
The price and inventory of AP7115-18WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7115-18WG-7 is usually 5 days.
3.What payment methods are accepted for AP7115-18WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7115-18WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7115-18WG-7?
AP7115-18WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7115-18WG-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 AP7115-18WG-7?
For technical support, including AP7115-18WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7115-18WG-7 requirements.
6.How does Aetrix verify that AP7115-18WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7115-18WG-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 AP7115-18WG-7 meets industry standards.
7.What is the process for return or replacement of AP7115-18WG-7?
All AP7115-18WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7115-18WG-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 AP7115-18WG-7 part is unused and in its original packaging.
Return procedure for AP7115-18WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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