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Diodes Incorporated AP7361-33FGE-7
- Part No.:
- AP7361-33FGE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AP7361-33FGE-7.pdf
- Description:
- IC REG LINEAR 3.3V 1A 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:75,054
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Product details
Overview
AP7361-33FGE-7 from Diodes Incorporated is a 1A fixed-output (3.3V) ultra-low dropout linear regulator in U-DFN3030-8 package, featuring 70µA typical quiescent current, 500mV dropout at 1A load, and integrated enable control. It delivers stable, low-noise power for FPGA I/O rails, portable audio subsystems, and battery-powered embedded systems requiring high PSRR and fast transient response.
For engineers reviewing the AP7361-33FGE-7 datasheet, AP7361-33FGE-7 pinout, AP7361-33FGE-7 application, or AP7361-33FGE-7 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (θJA = 70°C/W), EN logic thresholds, output accuracy (±1% at 100mA), and ceramic capacitor stability with ≥2.2µF COUT.
Technical Context
The AP7361-33FGE-7 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and eliminating reverse current flow. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 3.3V output stage - no external resistors required.
It integrates active current limiting (1.1–1.5A trip range), thermal shutdown (150°C activation with 20°C hysteresis), and fast start-up (200µs typical). The device operates across 2.2V–6.0V input and maintains regulation from –40°C to +85°C ambient without minimum load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at 100mA, ±2% over full temperature range - ensures reliable logic-level compliance for 3.3V I/O domains. |
| Max Output Current | 1.0A continuous - supports high-current digital loads like FPGA I/O banks or USB PHYs without external boost. |
| Dropout Voltage | 500mV at 1A load - enables operation from 3.8V input (e.g., single-cell Li-ion with protection circuitry) while maintaining 3.3V output. |
| Quiescent Current | 70µA typical - minimizes standby power loss in always-on subsystems such as real-time clocks or sensor wake-up circuits. |
| PSRR | 65dB at 1kHz, 45dB at 10kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Resistance | θJA = 70°C/W (U-DFN3030-8) - requires minimal PCB copper area for thermal relief under 1W dissipation at +85°C ambient. |
| Enable Threshold | VIH = 1.0V to VIN, VIL = 0.3V max - compatible with 1.8V/3.3V GPIOs for precise system power sequencing. |
Pinout & Package
AP7361-33FGE-7 uses the U-DFN3030-8 (3.0mm × 3.0mm, 0.5mm pitch) thermally enhanced package with exposed thermal pad. Pin 1 is ADJ/NC (no connection in fixed version), Pin 2 is GND, Pin 3 is IN, Pin 4 is GND, Pin 5 is EN, Pin 6 is NC, Pin 7 is NC, Pin 8 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (ADJ/NC) | Adjust pin / No connect | Internally tied off in fixed 3.3V version; must remain unconnected - not used for feedback or trimming. |
| Pin 2 & 4 (GND) | Power ground | Dual GND pins reduce impedance path to thermal pad; both must be soldered to PCB ground plane for thermal and EMI performance. |
| Pin 3 (IN) | Input supply | Accepts 2.2V–6.0V; requires ≥1µF ceramic decoupling placed adjacent to pin to suppress high-frequency noise and prevent oscillation. |
| Pin 5 (EN) | Enable control | Active-high logic input; drives regulator ON when ≥1.0V; pulls output to high-impedance state when <0.3V - enables dynamic power gating. |
| Pin 8 (OUT) | Regulated output | Delivers 3.3V ±1%; requires ≥2.2µF ceramic capacitor with 10–300mΩ ESR directly at pin for stability and transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 150mV @ 300mA and 500mV @ 1A - extends usable input voltage range in battery-powered systems nearing end-of-discharge. |
| Stable with ceramic capacitors | Guaranteed stability with ≥2.2µF X5R/X7R ceramic output cap - eliminates need for bulkier, higher-ESR tantalum or aluminum electrolytics. |
| Fast transient response | Load step recovery within microseconds (typ. 200µs start-up, <10µs line/load transients) - maintains clean supply during burst-mode processor activity. |
| Integrated protection | Current limit (1.1–1.5A), short-circuit clamp (~200mA), and thermal shutdown (150°C/130°C hysteresis) - prevents damage during fault conditions without external circuitry. |
| High PSRR | 65dB @ 1kHz, >45dB up to 10kHz - rejects ripple from switching regulators, critical for noise-sensitive analog/RF sections powered from same rail. |
Applications
| Portable Audio Power | FPGA I/O Rail |
|---|---|
|
Use Scenario: Powering DACs, headphone amplifiers, and codec I/O in Bluetooth speakers and wearables. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current post-regulator delivering clean 3.3V to analog signal chains. Use Value: 65dB PSRR and 70µA IQ preserve battery life while preventing audible switching noise coupling into audio paths. |
Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs. IC Role / Device Role / Timing Role: Fixed 3.3V LDO providing stable, sequenced power to FPGA I/O voltage domain. Use Value: Fast 200µs start-up enables tight power-up timing margins; 1A rating supports multi-bank simultaneous drive. |
| Laptop Subsystem Power | Industrial Sensor Node |
|
Use Scenario: Powering EC (Embedded Controller), touchpad controllers, and SMBus peripherals in ultrabooks. IC Role / Device Role / Timing Role: Always-on 3.3V rail with enable control for selective subsystem wake-up. Use Value: EN pin compatibility with 1.8V GPIOs allows direct microcontroller control; low dropout sustains operation down to 3.8V battery voltage. |
Use Scenario: Providing regulated 3.3V to LoRaWAN transceivers, environmental sensors, and MCU peripherals in battery-operated gateways. IC Role / Device Role / Timing Role: Primary power source for mixed-signal sensor interface with thermal and current fault resilience. Use Value: Thermal shutdown and current limiting ensure field reliability in unventilated enclosures; -40°C to +85°C rating supports outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 170mV dropout @ 250mA, SOT-23 package, no EN pin | Limited to low-power microcontrollers or sensors; lacks enable and thermal shutdown | Select only for space-constrained, sub-250mA designs where sequencing and fault protection are unnecessary. |
| Torex XC6219B332MR-G | 300mA max output, 160mV dropout @ 300mA, 1.6µA IQ, SOT-25 package, EN pin included | Lower IQ benefits ultra-long-life coin-cell applications; insufficient for 1A FPGA I/O loads | Prefer for energy-harvesting or button-cell devices needing nanowatt standby; not suitable for high-current use cases. |
Compared with MCP1700-3302E/TO and XC6219B332MR-G, AP7361-33FGE-7 uniquely combines 1A capability, 500mV dropout at full load, integrated EN control, and robust thermal/current protection - making it the only viable choice for compact, high-reliability 3.3V power delivery in compute-intensive portable electronics.
Availability
AP7361-33FGE-7 is available at Aetrix Electronics and suitable for FPGA power management, portable audio subsystems, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361-33FGE-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 ICs, with emphasis on power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.
The AP7361 belongs to Diodes' high-performance LDO family designed specifically for noise-sensitive, battery-constrained applications demanding ultra-low dropout, fast transient response, and comprehensive fault protection in miniature packages.
FAQ
What is the minimum output capacitance required for stability?
The AP7361-33FGE-7 is stable with a minimum 2.2µF X5R/X7R ceramic capacitor on the output, provided its ESR falls between 10mΩ and 300mΩ. Larger values improve transient response but are not required for basic stability. Placement must be adjacent to the OUT and GND pins.
Can the EN pin be left floating?
No - the EN pin must never be left floating. It has no internal pull-up or pull-down. For always-on operation, tie EN directly to the IN pin. For controlled enable/disable, drive it with a clean logic signal meeting VIH ≥1.0V and VIL ≤0.3V specifications.
Is thermal pad soldering mandatory for U-DFN3030-8?
Yes - the exposed thermal pad (Pin 4 GND) must be soldered to a dedicated PCB copper pour connected to the main ground plane using ≥4 thermal vias (0.3mm diameter). Omitting this compromises θJA performance and risks thermal shutdown under 1A load at elevated ambient temperatures.
Does AP7361-33FGE-7 support adjustable output voltage?
No - the "33" suffix denotes a factory-trimmed fixed 3.3V output. The ADJ pin (Pin 1) is internally disconnected and must remain unconnected. Adjustable versions (e.g., AP7361-ADJFGE-7) exist but require external resistor dividers and are not pin-compatible with this part.
AP7361-33FGE-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):
- 3.3V
- 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:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN3030-8 (Type E)
AP7361-33FGE-7 FAQ
1.How can I place an order for AP7361-33FGE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-33FGE-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 AP7361-33FGE-7 reliable?
The price and inventory of AP7361-33FGE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-33FGE-7 is usually 5 days.
3.What payment methods are accepted for AP7361-33FGE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-33FGE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-33FGE-7?
AP7361-33FGE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-33FGE-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 AP7361-33FGE-7?
For technical support, including AP7361-33FGE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-33FGE-7 requirements.
6.How does Aetrix verify that AP7361-33FGE-7 is sourced from the original manufacturer or authorized distributors?
All AP7361-33FGE-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 AP7361-33FGE-7 meets industry standards.
7.What is the process for return or replacement of AP7361-33FGE-7?
All AP7361-33FGE-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-33FGE-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 AP7361-33FGE-7 part is unused and in its original packaging.
Return procedure for AP7361-33FGE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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