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Diodes Incorporated AP7361-28D-13
- Part No.:
- AP7361-28D-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP7361-28D-13.pdf
- Description:
- IC REG LINEAR 2.8V 1A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:3,138
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Product details
Overview
AP7361-28D-13 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator in TO252 package with enable control, 70µA quiescent current, and 500mV dropout at full load-designed for FPGA I/O power, laptop subsystems, and battery-powered portable devices requiring stable low-noise voltage regulation.
For engineers reviewing the AP7361-28D-13 datasheet, AP7361-28D-13 pinout, AP7361-28D-13 application, or AP7361-28D-13 equivalent, key selection criteria include dropout performance at 1A, thermal shutdown threshold (150°C), EN pin logic thresholds (1.0V VIH), PSRR (65dB @ 1kHz), and compatibility with ≥2.2µF ceramic output capacitors.
Technical Context
The AP7361-28D-13 implements a PMOS pass transistor architecture enabling ultra-low dropout (500mV @ 1A) and fast transient response without requiring external compensation. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output by modulating gate drive to the pass element.
Enable functionality is implemented via a dedicated EN pin with 1.0V logic-high threshold and <0.1µA leakage; thermal shutdown activates at 150°C with 20°C hysteresis, while current limiting clamps output to 1.1–1.5A depending on input voltage and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% accuracy over -40°C to +85°C ambient - ensures stable core/I/O rail for FPGA and microcontroller peripherals. |
| Dropout Voltage | 500mV @ 1A load - enables operation from 3.3V input to deliver 2.8V output with >500mV headroom margin. |
| Quiescent Current | 70µA typical - minimizes standby power loss in battery-powered systems such as portable medical monitors. |
| PSRR | 65dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| EN Pin Threshold | VIH = 1.0V min - compatible with 1.8V and 3.3V GPIO without level-shifting in host controller interfaces. |
| Output Capacitor | Stable with ≥2.2µF ceramic (10–300mΩ ESR) - eliminates need for bulky tantalum or electrolytic capacitors. |
Pinout & Package
AP7361-28D-13 uses the TO252 (DPAK) thermally enhanced surface-mount package with exposed thermal pad, offering 95°C/W junction-to-ambient thermal resistance under standard 2"x2" FR-4 layout conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input supply connection | Accepts 2.2–6.0V input; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for noise suppression. |
| Pin 2 (GND) | Power ground reference | Common return path for input/output currents; must be connected to low-impedance ground plane for thermal and stability performance. |
| Pin 3 (OUT) | Regulated output terminal | Delivers 2.8V ±1% at up to 1A; requires ≥2.2µF ceramic capacitor with 10–300mΩ ESR for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500mV @ 1A load enables use with tight input-output margins in multi-rail power systems. |
| Fast start-up time | 200µs typical - supports dynamic power sequencing in portable devices entering/exiting sleep modes. |
| High PSRR | 65dB @ 1kHz improves immunity to ripple from switching regulators powering the LDO input. |
| Thermal & current protection | Integrated 150°C shutdown and 1.1–1.5A current limit prevent failure under fault conditions without external circuitry. |
| Green packaging | Halogen- and antimony-free, fully RoHS-compliant construction meets environmental compliance requirements for global OEMs. |
Applications
| FPGA I/O Power | Laptop Subsystem Rail |
|---|---|
Use Scenario: Powering 2.8V I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs in embedded vision modules. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean, tightly regulated 2.8V from a shared 3.3V intermediate bus. Use Value: 65dB PSRR attenuates switching noise from upstream buck converter, preventing I/O timing jitter and bit errors. |
Use Scenario: Supplying 2.8V display backlight driver ICs and USB PHY circuits in ultrabook designs. IC Role / Device Role / Timing Role: Fixed-output LDO providing isolated, low-quiescent-power rail independent of main CPU core voltage domain. Use Value: 70µA IQ extends battery runtime during display-on/idle states without compromising transient response during USB enumeration. |
| Battery-Powered Medical Monitor | Industrial PLC I/O Module |
Use Scenario: Regulating 2.8V for analog front-end ADC drivers and Bluetooth LE radio in handheld ECG devices. IC Role / Device Role / Timing Role: Low-noise, enable-controlled power stage ensuring signal integrity during active sensing and wireless transmission phases. Use Value: 500mV dropout allows direct derivation from single-cell Li-ion (3.0–4.2V), eliminating need for additional step-down conversion stages. |
Use Scenario: Generating 2.8V bias for isolated RS-485 transceivers and sensor interface op-amps in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Industrial-grade LDO with -40°C to +85°C operation and thermal cycling resilience for harsh factory environments. Use Value: TO252 package's 95°C/W θJA and integrated thermal shutdown ensure reliable operation under continuous 1A load at elevated ambient temperatures. |
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 |
|---|---|---|---|
| MCP1703T-2802E/MB | 250mV dropout @ 250mA, 3µA IQ, SOT-23-5 package - lower current rating and no enable pin. | Suitable only for sub-250mA loads; lacks EN control and thermal shutdown hysteresis. | Select when ultra-low IQ dominates over load current capability and enable functionality is unnecessary. |
| TLS850F2TE/V1 | 500mV dropout @ 1A, 40µA IQ, AEC-Q100 qualified, integrated watchdog - automotive-grade with higher cost and qualification overhead. | Designed for automotive body electronics; includes fail-safe monitoring not needed in industrial/commercial systems. | Select only for automotive programs requiring AEC-Q100 Grade 2 certification and functional safety features. |
Compared with MCP1703T-2802E/MB and TLS850F2TE/V1, the AP7361-28D-13 uniquely balances 1A output, 70µA IQ, EN control, and industrial temperature range in a cost-effective TO252 package-making it optimal for non-automotive high-current portable and embedded applications where thermal robustness and fast enable/disable are critical.
Availability
AP7361-28D-13 is available at Aetrix Electronics and suitable for FPGA power delivery, laptop subsystem rails, and battery-powered medical monitors requiring stable component supply across production lifecycles.
Supply support for AP7361-28D-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 regulator product line, engineered for low-noise, high-accuracy voltage regulation in space-constrained portable and industrial systems demanding ultra-low dropout and fast transient response.
FAQ
What is the minimum input voltage required for AP7361-28D-13 to maintain regulation at 1A output?
The AP7361-28D-13 requires VIN ≥ VOUT + VDROPOUT = 2.8V + 0.5V = 3.3V to sustain 1A output while maintaining regulation. Below this, output voltage collapses per the 500mV dropout specification at full load. Input voltage must also stay within the absolute maximum 6.5V limit.
Can AP7361-28D-13 operate without an enable signal connected?
Yes - the EN pin can be tied directly to IN to force permanent enable. This configuration is valid and commonly used when ON/OFF control is unnecessary. The EN pin draws only 0.01µA leakage, so connecting it to IN introduces negligible additional load on the input supply.
Is a minimum load required for stability with AP7361-28D-13?
No minimum load is required. The AP7361-28D-13 remains stable and regulated down to zero load current, as confirmed in the datasheet's "No Load Stability" section. This makes it suitable for always-on monitoring circuits and standby power domains.
What thermal considerations apply when using AP7361-28D-13 in TO252 package at 1A?
At 1A and 3.3V input (0.5V drop), power dissipation is 0.5W. With θJA = 95°C/W, junction temperature rise is ~48°C above ambient. At 85°C ambient, TJ ≈ 133°C - safely below the 150°C shutdown threshold. Adequate copper area on the thermal pad is essential to achieve rated θJA.
AP7361-28D-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- TO-252-3
AP7361-28D-13 FAQ
1.How can I place an order for AP7361-28D-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-28D-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 AP7361-28D-13 reliable?
The price and inventory of AP7361-28D-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-28D-13 is usually 5 days.
3.What payment methods are accepted for AP7361-28D-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-28D-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-28D-13?
AP7361-28D-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-28D-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 AP7361-28D-13?
For technical support, including AP7361-28D-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-28D-13 requirements.
6.How does Aetrix verify that AP7361-28D-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-28D-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 AP7361-28D-13 meets industry standards.
7.What is the process for return or replacement of AP7361-28D-13?
All AP7361-28D-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-28D-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 AP7361-28D-13 part is unused and in its original packaging.
Return procedure for AP7361-28D-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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