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Diodes Incorporated AP7361C-28FGE-7
- Part No.:
- AP7361C-28FGE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AP7361C-28FGE-7.pdf
- Description:
- IC REG LINEAR 2.8V 1A 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
AP7361C-28FGE-7 from Diodes Incorporated is a 1A fixed-output (2.8V) ultra-low dropout linear regulator in U-DFN3030-8 (Type E) package, featuring 360mV dropout at 1A, ±1% output accuracy, 60µA quiescent current, and active-high enable control. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable electronics.
For engineers reviewing the AP7361C-28FGE-7 datasheet, AP7361C-28FGE-7 pinout, AP7361C-28FGE-7 application, or AP7361C-28FGE-7 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (70°C/W), EN logic thresholds (0.3V low / 1.0V high), and compatibility with 2.2µF MLCC output capacitors.
Technical Context
The AP7361C-28FGE-7 integrates a PMOS pass element, band-gap reference (0.8V), error amplifier, and fold-back current limit (400mA short-circuit clamp). Its fixed 2.8V output eliminates external resistor divider requirements while retaining full enable functionality.
Thermal shutdown activates at 150°C with 20°C hysteresis, and PSRR reaches 75dB at 1kHz. The device operates across -40°C to +85°C ambient and remains stable with ≥2.2µF ceramic, tantalum, or solid polymer output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% - ensures precise biasing for 2.8V I/O rails and RF front-end stages. |
| Dropout Voltage | 360mV typical at 1A - enables operation from 3.16V input, critical for single-cell Li-ion (3.0–4.2V) systems. |
| Quiescent Current | 60µA typical - extends battery runtime in always-on sensor nodes and standby power domains. |
| Enable Threshold | VIH = 1.0V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIO without level-shifting. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Current Limit | 1.5A typical - provides robust overcurrent protection during inrush or fault conditions. |
| Thermal Resistance | θJA = 70°C/W - requires minimal PCB copper area for thermal relief in U-DFN3030-8 footprint. |
Pinout & Package
U-DFN3030-8 (Type E) package with exposed thermal pad (pin 4 connected to GND internally); 0.5mm pitch, 3.0mm × 3.0mm body, RoHS-compliant NiPdAu plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input; requires ≥1µF ceramic bypass capacitor placed adjacent to pin. |
| 2 | GND | Power ground; connects to thermal pad for heat dissipation and noise reference. |
| 3 | OUT | Regulated 2.8V output; stable with ≥2.2µF MLCC; place capacitor within 2mm of pin. |
| 4 | GND | Second ground terminal; ties to thermal pad and system ground plane for low-impedance return path. |
| 5 | EN | Active-high enable; pulled high to VIN via 3MΩ internal resistor if unused; drives directly from MCU GPIO. |
| 6 | NC | No connection; electrically isolated; must not be soldered or tied to any net. |
| 7 | NC | No connection; electrically isolated; must not be soldered or tied to any net. |
| 8 | ADJ/NC | No connection in fixed-output variant; left floating; not used for voltage setting. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 360mV at 1A enables use with <3.2V inputs - essential for single-cell battery-powered audio codecs. |
| Fold-back short-circuit protection | Clamps output to 400mA during hard shorts - prevents thermal runaway while allowing safe recovery. |
| Low-noise operation | 75dB PSRR at 1kHz rejects ripple from buck converters - preserves SNR in ADC reference supplies. |
| Wide input range | 2.2V–6.0V supports diverse sources including USB, Li-ion, and regulated 5V rails - simplifies BOM across platforms. |
| Stable with small MLCCs | Works with ≥2.2µF X5R/X7R ceramics - eliminates need for bulky electrolytics in thin-profile designs. |
Applications
| Portable Audio Amplifiers | USB-C Power Delivery Receivers |
|---|---|
|
Use Scenario: Powering Class-D audio amplifiers in Bluetooth speakers with Li-ion battery input (3.0–4.2V). IC Role / Device Role / Timing Role: Provides clean, low-noise 2.8V supply to amplifier bias circuitry and digital control logic. Use Value: 360mV dropout allows full 1A output down to 3.16V input, maximizing usable battery capacity before brownout. |
Use Scenario: Generating 2.8V auxiliary rail for USB-C PD controller logic and CC line termination resistors. IC Role / Device Role / Timing Role: Delivers tightly regulated, fast-starting (≤200µs) power to PD protocol stack during hot-plug events. Use Value: 60µA quiescent current minimizes standby loss; EN pin enables synchronous power sequencing with PD state machine. |
| Industrial Sensor Signal Chains | Smart Home Display Backlights |
|
Use Scenario: Supplying precision op-amps and SAR ADCs in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Low-noise 2.8V reference rail for analog front-end components requiring <0.1% gain stability. Use Value: ±1% output accuracy and ±100ppm/°C tempco ensure measurement repeatability across -40°C to +85°C industrial range. |
Use Scenario: Biasing white LED strings in compact smart display modules powered by 3.7V Li-ion cells. IC Role / Device Role / Timing Role: Supplies constant-voltage gate drive for LED driver MOSFETs and microcontroller I/O. Use Value: Thermal shutdown (150°C) and fold-back current limit protect against LED open-circuit faults and PCB overheating. |
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 at 250mA, 150mA max output, SOT-23-5 package | Limited to low-current bias rails; unsuitable for 1A loads | Select only for sub-150mA applications where board space is more critical than current capability. |
| Torex XC6210B282MR-G | 200mV dropout at 1A, 1.1V–6.0V input, SOT-25 package | Lower dropout but no integrated thermal shutdown; requires external thermal monitoring | Prefer when ultra-low dropout dominates design priority and thermal management is handled externally. |
Compared with MCP1703T-2802E/MB and XC6210B282MR-G, the AP7361C-28FGE-7 uniquely combines 1A output, 360mV dropout, full thermal shutdown, and fold-back protection in a thermally enhanced U-DFN3030-8 package - making it optimal for space-constrained, high-reliability 2.8V power delivery.
Availability
AP7361C-28FGE-7 is available at Aetrix Electronics and suitable for portable audio systems, USB-C PD receivers, industrial sensor nodes, and smart display backlight controllers requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP7361C-28FGE-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF16949:2016 and AEC-Q100/101/200 standards.
The AP7361C belongs to Diodes' high-performance LDO family designed for battery-powered and noise-sensitive applications demanding ultra-low dropout, low IQ, and robust fault protection.
FAQ
What is the minimum input voltage required for AP7361C-28FGE-7 to maintain regulation at 1A load?
The minimum input voltage is calculated as VOUT + VDROPOUT = 2.8V + 0.36V = 3.16V. At 1A load and +25°C, regulation is maintained down to this voltage; derating applies above +85°C ambient due to thermal limits.
Can AP7361C-28FGE-7 operate without an external output capacitor?
No. A minimum 2.2µF ceramic capacitor is required between OUT and GND for stability. Omitting it causes oscillation and potential damage. The capacitor must be placed within 2mm of the OUT and GND pins per layout guidelines.
Is the EN pin internally pulled up, and what happens if left unconnected?
Yes - the EN pin has a 3.0MΩ internal pull-down resistor. If left floating, the device remains disabled. To ensure reliable turn-on, tie EN directly to VIN or drive it actively high with a GPIO capable of ≥1.0V output.
How does thermal shutdown behave under sustained overload conditions?
When junction temperature reaches ~150°C, the output shuts off. After cooling to ~130°C, output resumes automatically. Under continuous overload, this causes on/off cycling - a fail-safe mechanism that prevents permanent damage but requires thermal design review to avoid operational disruption.
AP7361C-28FGE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- 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:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN3030-8 (Type E)
AP7361C-28FGE-7 FAQ
1.How can I place an order for AP7361C-28FGE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-28FGE-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 AP7361C-28FGE-7 reliable?
The price and inventory of AP7361C-28FGE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361C-28FGE-7 is usually 5 days.
3.What payment methods are accepted for AP7361C-28FGE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-28FGE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-28FGE-7?
AP7361C-28FGE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-28FGE-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 AP7361C-28FGE-7?
For technical support, including AP7361C-28FGE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-28FGE-7 requirements.
6.How does Aetrix verify that AP7361C-28FGE-7 is sourced from the original manufacturer or authorized distributors?
All AP7361C-28FGE-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 AP7361C-28FGE-7 meets industry standards.
7.What is the process for return or replacement of AP7361C-28FGE-7?
All AP7361C-28FGE-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-28FGE-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 AP7361C-28FGE-7 part is unused and in its original packaging.
Return procedure for AP7361C-28FGE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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