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Diodes Incorporated AP7361-28ER-13
- Part No.:
- AP7361-28ER-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361-28ER-13.pdf
- Description:
- IC REG LINEAR 2.8V 1A SOT223R
- Quantity:
- Payment:
- Shipping:
Inventory:3,348
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Product details
Overview
AP7361-28ER-13 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator in SOT223R package with enable control, 70µA quiescent current, 500mV dropout at full load, and thermal shutdown protection. It powers FPGA I/O rails, laptop subsystems, and battery-powered audio devices requiring stable low-noise 2.8V supply.
For engineers reviewing the AP7361-28ER-13 datasheet, AP7361-28ER-13 pinout, AP7361-28ER-13 application, or AP7361-28ER-13 equivalent, key selection criteria include dropout voltage at 1A, EN pin logic thresholds, thermal resistance (110°C/W), output accuracy (±2%), and ceramic capacitor stability down to 2.2µF.
Technical Context
The AP7361-28ER-13 implements a PMOS pass transistor architecture with internal 0.8V bandgap reference and error amplifier for precise output regulation. Its enable circuitry responds to VIH ≥ 1.0V and VIL ≤ 0.3V, supporting direct microcontroller GPIO control without level shifting.
Thermal shutdown activates at +150°C with 20°C hysteresis, and current limiting triggers at 1.1–1.5A depending on input voltage and temperature. The device maintains regulation from -40°C to +85°C ambient with no minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% over -40°C to +85°C, enabling direct replacement of legacy 2.8V LDOs without resistor divider. |
| Dropout Voltage | 500mV at 1A load ensures stable 2.8V output even when input drops to 3.3V - critical for single-cell Li-ion or buck-boost pre-regulated systems. |
| Quiescent Current | 70µA typical enables >1-year battery life in always-on IoT sensors powered by 200mAh coin cells. |
| PSRR | 65dB at 1kHz suppresses switching noise from upstream DC/DC converters, reducing need for additional filtering in audio power rails. |
| Output Capacitor | Stable with ≥2.2µF ceramic (10–300mΩ ESR), allowing compact 0603/0805 MLCC placement adjacent to IC for optimal transient response. |
| Enable Threshold | VIH = 1.0V min allows direct interface with 1.8V/3.3V logic without pull-up resistors or level translators. |
| Thermal Resistance | θJA = 110°C/W in SOT223R package requires minimal copper area (≥100mm²) for 1A continuous operation at 60°C ambient. |
Pinout & Package
SOT223R package features exposed thermal pad on bottom side, with pin 1 = GND, pin 2 = OUT, pin 3 = IN. Pin 4 is NC. Thermal pad must be soldered to PCB ground plane for rated 1A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal reference ground | Primary return path for load current and internal bias; connects directly to thermal pad for heat dissipation. |
| OUT (Pin 2) | Regulated 2.8V output | Delivers up to 1A; requires ≥2.2µF ceramic capacitor placed within 2mm of this pin and GND for stability. |
| IN (Pin 3) | Input supply (2.2–6.0V) | Accepts wide input range; needs ≥1µF ceramic bypass capacitor close to IN–GND to suppress high-frequency noise. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating - no external tie or trace routing permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500mV at 1A enables operation from 3.3V rail while delivering full 2.8V - avoids need for higher-input buck converters in space-constrained designs. |
| Fast start-up time | 200µs typical allows rapid power cycling of peripherals in portable devices, reducing system wake-up latency without increasing IQ. |
| Ceramic capacitor stability | Guaranteed stable with 2.2µF X5R/X7R MLCC (10–300mΩ ESR), eliminating costly tantalum or polymer capacitors and simplifying BOM. |
| Integrated protection | Current limit (1.1–1.5A), short-circuit clamp (~200mA), and thermal shutdown (+150°C) prevent field failures without external circuitry. |
| Green packaging | Halogen- and antimony-free, fully RoHS-compliant molding compound meets IPC-1752A Tier 1 reporting requirements for automotive and industrial programs. |
Applications
| Portable Audio Devices | FPGA I/O Power Rails |
|---|---|
Use Scenario: Powering DACs, headphone amplifiers, and codec I/O in Bluetooth earbuds and portable speakers. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying analog and digital I/O domains with low noise and fast transient response. Use Value: 65dB PSRR at 1kHz attenuates switching noise from 2MHz DC/DC, preserving SNR >105dB without ferrite beads or LC filters. |
Use Scenario: Providing configurable I/O voltage for Xilinx Artix-7 or Intel Cyclone V FPGA banks interfacing with multiple logic families. IC Role / Device Role / Timing Role: Fixed 2.8V regulator for HSTL or SSTL-18 I/O standards requiring tight voltage tolerance and low ripple. Use Value: ±2% output accuracy and <1.0% load regulation ensure setup/hold timing margins are maintained across 0–1A dynamic current steps. |
| Laptop Subsystem Power | Battery-Powered Industrial Sensors |
Use Scenario: Supplying USB-C PD controller, EC firmware flash memory, and touchpad controllers in ultrabook platforms. IC Role / Device Role / Timing Role: Always-on 2.8V rail maintaining real-time clock, keyboard scan, and wake-on-LAN functionality during S3/S4 sleep states. Use Value: 70µA quiescent current extends battery runtime by >30 hours in 48Wh systems during suspend mode, meeting ACPI v6.2 requirements. |
Use Scenario: Powering LoRaWAN node transceivers, MEMS accelerometers, and ADCs in remote condition-monitoring nodes deployed for 10+ years. IC Role / Device Role / Timing Role: Primary regulator converting 3.6V Li-SOCl₂ cell output to stable 2.8V for RF and sensing circuitry with intermittent 100ms burst loads. Use Value: 500mV dropout allows >92% energy utilization from cell's 3.6V–2.9V discharge curve, maximizing usable capacity before brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | Higher dropout (600mV @1A), higher IQ (2.5µA), SOIC-8 package only | Lacks SOT223R thermal performance; unsuitable for 1A continuous in confined spaces | Choose only if board already uses SOIC footprint and thermal margin exceeds 25°C |
| Torex XC6210B282MR-G | Lower IQ (1.2µA), smaller USP-6B package, but 300mA max output current | Cannot support 1A FPGA I/O loads; limited to sensor or MCU core rails | Select when ultra-low standby power dominates over output current capability |
Compared with MCP1703T-2802E/MB and XC6210B282MR-G, the AP7361-28ER-13 uniquely delivers 1A output in thermally optimized SOT223R with 500mV dropout and 70µA IQ - making it the only viable choice for compact, high-current, battery-sensitive applications where both thermal headroom and efficiency matter.
Availability
AP7361-28ER-13 is available at Aetrix Electronics and suitable for FPGA I/O power, portable audio subsystems, and battery-powered industrial sensors requiring stable component supply, long-lifecycle availability, and RoHS-compliant green packaging.
Supply support for AP7361-28ER-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7361 belongs to Diodes' high-performance LDO family designed for space-constrained, battery-operated, and thermally demanding applications where ultra-low dropout, fast transient response, and robust protection are mandatory.
FAQ
What is the maximum input voltage for AP7361-28ER-13?
The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.2V to 6.0V. Exceeding 6.0V risks violating the 0.3V overvoltage limit on EN and ADJ pins relative to VIN, potentially damaging internal ESD structures. For 2.8V output, inputs above 5.5V increase power dissipation disproportionately without functional benefit.
Can AP7361-28ER-13 be used without an enable signal?
Yes - tie the EN pin directly to the IN pin to maintain permanent enable state. This configuration draws only 70µA quiescent current and eliminates external pull-up components. Do not leave EN floating, as leakage currents may cause unpredictable turn-on behavior or increased shutdown current.
Is a minimum load required for stability?
No minimum load is required. The AP7361-28ER-13 remains stable and regulated from zero load to full 1A, verified across -40°C to +85°C. This eliminates the need for dummy loads in always-on monitoring circuits or low-power sleep modes where load current drops to microamps.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches +150°C, the output disables and remains off until temperature falls to +130°C (20°C hysteresis). Under continuous overload, this causes on-off cycling - measurable as periodic 200µs start-up bursts. To avoid cycling, ensure θJA × (VIN − VOUT) × IOUT + TA ≤ 130°C, using the SOT223R's 110°C/W rating.
AP7361-28ER-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB ~ 45dB (1kHz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223R
AP7361-28ER-13 FAQ
1.How can I place an order for AP7361-28ER-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-28ER-13 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 AP7361-28ER-13 reliable?
The price and inventory of AP7361-28ER-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-28ER-13 is usually 5 days.
3.What payment methods are accepted for AP7361-28ER-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-28ER-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-28ER-13?
AP7361-28ER-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-28ER-13 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 AP7361-28ER-13?
For technical support, including AP7361-28ER-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-28ER-13 requirements.
6.How does Aetrix verify that AP7361-28ER-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-28ER-13 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 AP7361-28ER-13 meets industry standards.
7.What is the process for return or replacement of AP7361-28ER-13?
All AP7361-28ER-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-28ER-13, 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 AP7361-28ER-13 part is unused and in its original packaging.
Return procedure for AP7361-28ER-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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