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Diodes Incorporated AP7361C-28ER-13
- Part No.:
- AP7361C-28ER-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361C-28ER-13.pdf
- Description:
- IC REG LINEAR 2.8V 1A SOT223R
- Quantity:
- Payment:
- Shipping:
Inventory:1,791
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Product details
Overview
AP7361C-28ER-13 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator with enable, designed for power rail regulation in portable and battery-powered systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 2.8V dropout is 340mV typ), 60µA quiescent current, and integrates thermal shutdown, fold-back short-circuit protection (400mA), and current limiting (1.5A). It powers core logic rails in LCD-TVs and set-top boxes.
For engineers reviewing the AP7361C-28ER-13 datasheet, AP7361C-28ER-13 pinout, AP7361C-28ER-13 application, or AP7361C-28ER-13 equivalent, key selection criteria include dropout voltage at 2.8V output, EN pin logic thresholds (VIH=1.0V, VIL=0.3V), stability with ≥2.2µF MLCC output capacitors, and thermal resistance (θJA = 110°C/W in SOT223R package).
Technical Context
The AP7361C-28ER-13 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and high PSRR (75dB @ 1kHz). Its internal 0.8V bandgap reference and error amplifier regulate output via feedback-fixed-mode bypasses ADJ pin, simplifying design for stable 2.8V supply generation.
Enable control is active-high with integrated 3.0MΩ pull-down resistor and <0.1µA leakage, supporting low-power sequencing. Protection circuitry includes fold-back current limiting (triggering at ~400mA during short-circuit) and thermal shutdown at 150°C with 20°C hysteresis, ensuring robustness in thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% - ensures precise biasing for 2.8V I/O rails or RF front-end circuitry. |
| Max Output Current | 1.0A continuous - supports moderate-power digital ICs and analog subsystems without external boost. |
| Dropout Voltage | 340mV typ @ 1A (2.8V output) - enables operation from 3.14V input, critical for single-cell Li-ion or 3.3V rail derating. |
| Quiescent Current | 60µA typ - minimizes standby power loss in always-on circuits like remote control receivers or sensor wake-up paths. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C threshold with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| EN Logic Thresholds | VIL ≤ 0.3V, VIH ≥ 1.0V - compatible with 1.8V/3.3V GPIOs without level-shifting in mixed-voltage systems. |
| Stability Capacitor | ≥2.2µF ceramic (MLCC) on output - eliminates need for bulky electrolytics, reducing board area and improving transient response. |
Pinout & Package
AP7361C-28ER-13 is packaged in SOT223R (RoHS-compliant, matte tin-plated leads), featuring exposed thermal pad for enhanced heat dissipation. Pin 1 = GND, Pin 2 = OUT, Pin 3 = IN - optimized for low-inductance layout and thermal performance in space-constrained consumer electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | GND | Power ground reference and primary thermal path to PCB copper; must connect to large ground plane. |
| Pin 2 | OUT | Regulated 2.8V output; requires ≥2.2µF MLCC placed adjacent to pin for stability and load transient suppression. |
| Pin 3 | IN | Input supply (2.2–6.0V); needs ≥1µF ceramic decoupling close to pin to suppress high-frequency noise. |
| Exposed Pad | Thermal Pad / GND | Internally connected to GND; soldered to PCB thermal plane to achieve θJA = 110°C/W and prevent thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Dropout | 340mV @ 1A (2.8V) - extends usable input voltage range down to 3.14V, maximizing battery runtime in portable devices. |
| Low Quiescent Current | 60µA typical - reduces no-load power loss by >90% vs. legacy LDOs, critical for IoT endpoint sleep modes. |
| Fold-Back Short-Circuit Protection | Clamps output to ~400mA during fault - limits power dissipation and avoids thermal runaway without external current-sense circuitry. |
| High PSRR | 75dB @ 1kHz - maintains clean 2.8V supply for noise-sensitive analog blocks (e.g., audio DACs, RF synthesizers) fed from noisy SMPS. |
| EN Pin with Internal Pull-Down | 3.0MΩ integrated resistor - eliminates need for external pull-down, simplifying BOM and ensuring default-off behavior at power-up. |
| Wide Input Range | 2.2V to 6.0V - accommodates diverse sources including Li-ion (2.7–4.2V), USB (4.75–5.25V), and industrial 5V rails. |
Applications
| Smart TV Power Management | Set-Top Box Core Logic Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 2.8V to HDMI transmitter PHY and display interface controllers in 4K smart TVs. IC Role / Device Role / Timing Role: Primary post-regulator for noise-sensitive video signal chains, replacing less efficient discrete solutions. Use Value: 75dB PSRR rejects switching noise from main 12V-to-5V DC/DC, preventing pixel jitter and color banding artifacts. |
Use Scenario: Delivering stable 2.8V to ARM Cortex-A53 application processor I/O banks and DDR3L memory termination in cable/satellite STBs. IC Role / Device Role / Timing Role: Fixed-output LDO for SoC auxiliary rail, sequenced via EN pin during boot and deep-sleep transitions. Use Value: 60µA IQ and fast 200µs startup reduce system-level standby power and improve channel-change latency. |
| Portable Media Player Audio Codec | Home Appliance MCU Core Supply |
|
Use Scenario: Powering 2.8V analog section of stereo audio codec (DAC/ADC) in Bluetooth-enabled media players. IC Role / Device Role / Timing Role: Low-noise local regulator isolating audio circuitry from noisy system power domain. Use Value: 340mV dropout allows direct regulation from single 3.7V Li-ion cell, eliminating intermediate 3.3V stage and saving BOM cost. |
Use Scenario: Supplying 2.8V to 32-bit MCU core and touch controller in smart refrigerators and washing machines. IC Role / Device Role / Timing Role: Industrial-grade LDO handling wide ambient temperature (-40°C to +85°C) and line transients. Use Value: Thermal shutdown (150°C) and 1.5A current limit protect against sustained overloads in sealed, poorly ventilated enclosures. |
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 | 250mV dropout @ 250mA (not rated at 1A); 1.8µA IQ; no EN pin; SOT23-5 package | Limited to sub-300mA loads; unsuitable for high-current 2.8V rails requiring full 1A capability | Select only for ultra-low-IQ, low-current biasing where 1A capacity is unnecessary |
| Torex XC6210B282MR-G | 450mV dropout @ 1A; 15µA IQ; EN pin included; SOT23-5 package | Higher dropout reduces minimum input voltage margin; smaller package limits thermal performance at full load | Prefer when board space is critical and thermal headroom exceeds 20°C above ambient |
Compared with MCP1703T-2802E/MB and XC6210B282MR-G, AP7361C-28ER-13 uniquely balances 1A delivery, 340mV dropout, and 60µA IQ in a thermally robust SOT223R package-making it optimal for cost-sensitive, medium-power consumer electronics where reliability under sustained load matters.
Availability
AP7361C-28ER-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box core logic supply, and home appliance MCU core supply requiring stable component supply across production volumes and extended lifecycle planning.
Supply support for AP7361C-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 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 AP7361C belongs to Diodes' precision LDO regulator product line, engineered specifically for low-noise, low-dropout power delivery in space- and efficiency-constrained portable and home entertainment electronics.
FAQ
What is the maximum input voltage for AP7361C-28ER-13?
The absolute maximum input voltage is 6.5V, but recommended operating range is 2.2V to 6.0V. Exceeding 6.0V risks violating safe operating area limits and may trigger internal protection circuits even before thermal shutdown activates.
Can AP7361C-28ER-13 operate without an output capacitor?
No. A minimum 2.2µF ceramic capacitor is required on the OUT pin for stability. Omitting it causes oscillation and unregulated output; larger values (e.g., 4.7µF–10µF) further improve load transient response and reduce output ripple.
Is the EN pin mandatory for operation?
No. If enable functionality is unused, tie the EN pin directly to the IN pin to maintain permanent ON state. Leaving EN floating is not allowed due to risk of unintended shutdown from noise coupling.
How does thermal performance differ between SOT223 and SOT223R packages?
SOT223R (used in AP7361C-28ER-13) has reversed pinout (GND-OUT-IN) and identical thermal resistance (θJA = 110°C/W) to standard SOT223. Both require thermal pad soldering; the R-variant enables alternate PCB layout routing but delivers identical junction-to-ambient performance under same board conditions.
AP7361C-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):
- 0.36V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB ~ 55dB (1kHz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223R
AP7361C-28ER-13 FAQ
1.How can I place an order for AP7361C-28ER-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-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 AP7361C-28ER-13 reliable?
The price and inventory of AP7361C-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 AP7361C-28ER-13 is usually 5 days.
3.What payment methods are accepted for AP7361C-28ER-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-28ER-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-28ER-13?
AP7361C-28ER-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-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 AP7361C-28ER-13?
For technical support, including AP7361C-28ER-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-28ER-13 requirements.
6.How does Aetrix verify that AP7361C-28ER-13 is sourced from the original manufacturer or authorized distributors?
All AP7361C-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 AP7361C-28ER-13 meets industry standards.
7.What is the process for return or replacement of AP7361C-28ER-13?
All AP7361C-28ER-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-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 AP7361C-28ER-13 part is unused and in its original packaging.
Return procedure for AP7361C-28ER-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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