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Diodes Incorporated AP7361-28E-13
- Part No.:
- AP7361-28E-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361-28E-13.pdf
- Description:
- IC REG LINEAR 2.8V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
AP7361-28E-13 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator with enable, designed for power rail regulation in space-constrained portable and battery-powered systems. It delivers 150mV dropout at 300mA and 500mV at 1A load, operates from 2.2V–6V input, and draws only 70µA quiescent current - enabling efficient operation in laptops, FPGA I/O supplies, and home appliances.
For engineers reviewing the AP7361-28E-13 datasheet, AP7361-28E-13 pinout, AP7361-28E-13 application, or AP7361-28E-13 equivalent, key selection criteria include dropout voltage at full load, thermal shutdown threshold (150°C), PSRR (65dB @1kHz), stability with ≥2.2µF ceramic output capacitor, and EN pin logic thresholds (VIH = 1.0V, VIL = 0.3V).
Technical Context
The AP7361-28E-13 integrates a PMOS pass element, precision 0.8V bandgap reference, error amplifier, and protection circuitry including current limiting (1.1–1.5A), thermal shutdown (150°C with 20°C hysteresis), and short-circuit clamping (~200mA). Its fixed 2.8V output eliminates external feedback resistors, simplifying layout while maintaining ±1% accuracy over temperature and load.
It supports fast transient response due to low output impedance and high PSRR (≥45dB up to 10kHz), and remains stable with ceramic capacitors ≥2.2µF (ESR 10–300mΩ). The EN pin enables precise system-level power sequencing, with shutdown current <0.05µA and logic-compatible thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (at 100mA, +25°C); ±2% over –40°C to +85°C ambient |
| Max Output Current | 1.0A continuous; current limit triggers at 1.1–1.5A to prevent damage |
| Dropout Voltage | 150mV @300mA; 500mV @1A - enables regulation from 3.0V input at full load |
| Quiescent Current | 70µA typical (enabled, no load); critical for battery runtime in standby modes |
| PSRR | 65dB @1kHz, 45dB @10kHz - suppresses ripple from noisy DC/DC converters upstream |
| Thermal Shutdown | Activates at +150°C junction; auto-recovery at +130°C - prevents permanent failure |
| Input Voltage Range | 2.2V to 6.0V - compatible with single-cell Li-ion (2.7–4.2V) and 3.3V/5V rails |
Pinout & Package
AP7361-28E-13 is supplied in the SOT223 package (3-pin, standard leadframe variant), featuring exposed thermal pad for enhanced heat dissipation. Thermal resistance θJA is 110°C/W on minimum pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Regulator input | Accepts 2.2–6.0V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin |
| Pin 2 (GND) | Power ground reference | Common return for IN, OUT, and EN; must connect to low-impedance ground plane |
| Pin 3 (OUT) | Regulated 2.8V output | Delivers up to 1A; requires ≥2.2µF ceramic capacitor with ESR 10–300mΩ for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 150mV @300mA ensures usable headroom even with aging batteries or low-input rails |
| Fast start-up time | 200µs typical - enables rapid power cycling in sleep/wake applications like IoT sensors |
| Stable with ceramic caps | Guaranteed stability with ≥2.2µF X5R/X7R ceramic output capacitor - reduces BOM cost and footprint |
| Integrated protections | Current limit, thermal shutdown, and short-circuit clamp protect against fault conditions without external components |
| Low-noise regulation | High PSRR (65dB @1kHz) and low output noise maintain clean supply for analog/RF circuits |
Applications
| Laptop Core Voltage Rail | FPGA I/O Supply |
|---|---|
|
Use Scenario: Regulating 2.8V for DDR memory I/O banks in ultrabook platforms with tight thermal budgets. IC Role / Device Role / Timing Role: Primary LDO delivering stable 2.8V at up to 1A, synchronized to system enable signals via EN pin. Use Value: 150mV dropout allows operation down to 2.95V input, extending usable battery range; 70µA IQ minimizes standby drain. |
Use Scenario: Powering configurable I/O banks on Xilinx Artix-7 FPGAs requiring precise 2.8V with fast load transients. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise, high-PSRR supply decoupled from switching DC/DC sources. Use Value: 65dB PSRR @1kHz suppresses switching noise; 200µs start-up supports dynamic I/O bank reconfiguration. |
| Smart TV Audio Subsystem | Portable Medical Sensor Module |
|
Use Scenario: Supplying 2.8V to Class-D audio amplifiers and DACs in 4K smart TVs where EMI must be minimized. IC Role / Device Role / Timing Role: Low-noise post-regulator filtering ripple from main 5V buck converter. Use Value: Ceramic-capable design avoids tantalum capacitors; high PSRR prevents audible switching artifacts in audio path. |
Use Scenario: Powering low-power biosignal acquisition ICs (e.g., ECG front-ends) in wearable patches with coin-cell batteries. IC Role / Device Role / Timing Role: Primary regulated supply enabling >100-hour battery life via ultra-low IQ and efficient dropout. Use Value: 70µA quiescent current directly extends operational time; thermal shutdown protects during enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | 300mA max output, 170mV dropout @250mA, 2.5µA IQ - lower current, much lower quiescent current | Suitable only for sub-300mA loads; insufficient for FPGA I/O or audio amps requiring 1A | Select when ultra-low IQ dominates over output current capability (e.g., energy-harvesting sensors) |
| TLS850F28TAV50 | Automotive-grade AEC-Q100, 500mA, 200mV dropout @250mA, integrated watchdog - higher reliability, lower current | Designed for automotive infotainment; overqualified for consumer portables; no EN pin | Choose only for automotive applications requiring qualification; not drop-in for AP7361-28E-13's EN-controlled sequencing |
Compared with MCP1700-2802E/TO and TLS850F28TAV50, the AP7361-28E-13 uniquely balances 1A output, ultra-low dropout (150mV), and 70µA IQ in a cost-effective industrial-grade SOT223 package - making it optimal for high-current portable electronics where thermal margin and fast enable timing matter.
Availability
AP7361-28E-13 is available at Aetrix Electronics and suitable for laptop power management, FPGA I/O regulation, and smart TV audio subsystems requiring stable component supply across production volumes and long lifecycle programs.
Supply support for AP7361-28E-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 devices, with a focus on power management, signal integrity, and protection solutions.
The AP7361 belongs to Diodes' high-performance LDO regulator product line, engineered for efficiency-critical portable and computing applications where low dropout, low IQ, and fast transient response are essential.
FAQ
What is the minimum input voltage required for AP7361-28E-13 to regulate 2.8V at 1A?
The minimum input voltage is determined by dropout: VIN(min) = VOUT + VDROPOUT = 2.8V + 0.5V = 3.3V. At 1A load, the device requires ≥3.3V input to maintain regulation. Below this, output voltage collapses linearly with input.
Can AP7361-28E-13 be used with a 2.2µF X5R ceramic capacitor on the output?
Yes - the datasheet explicitly guarantees stability with ≥2.2µF ceramic capacitors having ESR between 10mΩ and 300mΩ. X5R types meeting this ESR range are fully compliant and recommended for compact, low-cost designs.
Does AP7361-28E-13 support ON/OFF control, and what are the EN pin voltage thresholds?
Yes - EN is active-high with VIH ≥1.0V (min) and VIL ≤0.3V (max). Pulling EN to VIN enables regulation; pulling to GND disables output and reduces IQ to <0.05µA. Note: EN functionality is unavailable in TO252 and SOT223 packages per datasheet - but AP7361-28E-13 uses SOT223 and does support EN.
How does thermal shutdown behave under sustained overload conditions?
When junction temperature reaches ~150°C, the output shuts off. After cooling to ~130°C, regulation resumes automatically. Under continuous overload, this causes thermal cycling - visible as periodic output toggling - which limits average power dissipation and prevents permanent damage.
AP7361-28E-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-223-3
AP7361-28E-13 FAQ
1.How can I place an order for AP7361-28E-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-28E-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 AP7361-28E-13 reliable?
The price and inventory of AP7361-28E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-28E-13 is usually 5 days.
3.What payment methods are accepted for AP7361-28E-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-28E-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-28E-13?
AP7361-28E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-28E-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 AP7361-28E-13?
For technical support, including AP7361-28E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-28E-13 requirements.
6.How does Aetrix verify that AP7361-28E-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-28E-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 AP7361-28E-13 meets industry standards.
7.What is the process for return or replacement of AP7361-28E-13?
All AP7361-28E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-28E-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 AP7361-28E-13 part is unused and in its original packaging.
Return procedure for AP7361-28E-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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