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Diodes Incorporated AP7361C-33DR-13
- Part No.:
- AP7361C-33DR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP7361C-33DR-13.pdf
- Description:
- IC REG LINEAR 3.3V 1A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
AP7361C-33DR-13 from Diodes Incorporated is a 1A fixed-output (3.3V), ultra-low dropout linear regulator with enable pin, designed for power rail regulation in space-constrained and battery-sensitive systems. It delivers ±1% output accuracy, 360mV dropout at 1A, 60µA quiescent current, and integrates thermal shutdown, fold-back short-circuit protection (400mA), and current limiting (1.5A). It is used in LCD-TV power supplies where stable 3.3V biasing for TCON and interface ICs is required.
For engineers reviewing the AP7361C-33DR-13 datasheet, AP7361C-33DR-13 pinout, AP7361C-33DR-13 application, or AP7361C-33DR-13 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds (VIH=1.0V, VIL=0.3V), thermal resistance (θJA = 95°C/W for TO252-R), PSRR (75dB @ 1kHz), and compatibility with 2.2µF MLCC output capacitors.
Technical Context
The AP7361C-33DR-13 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and high PSRR. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 3.3V output node - no external resistors required. The EN pin directly controls gate drive to the pass element, enabling fast startup (150µs) and low shutdown current (0.05µA).
Protection circuitry includes fold-back current limiting triggered at ~400mA during short-circuit events and thermal shutdown activation at +150°C with 20°C hysteresis. The device remains stable with ≥2.2µF ceramic output capacitance and requires only a 1µF input capacitor, supporting compact, low-BOM-count designs in consumer power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures reliable logic-level compliance for 3.3V I/O domains without trimming. |
| Max Output Current | 1.0A continuous - supports mid-power digital subsystems such as HDMI PHYs or audio codecs. |
| Dropout Voltage | 360mV at 1A (3.3V output) - enables operation from 3.66V input, critical for single-cell Li-ion or 4.0V USB-powered systems. |
| Quiescent Current | 60µA typical - minimizes standby power loss in always-on circuits like remote control receivers. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Enable Threshold | VIH = 1.0V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIOs without level-shifting. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7361C-33DR-13 is packaged in TO252 (DPAK)R - a 3-pin surface-mount package with exposed thermal pad, optimized for moderate-power dissipation and automated assembly. Pin 1 = GND, Pin 2 = OUT, Pin 3 = IN. The "R" suffix denotes reversed pinout versus standard TO252 (DPAK), improving layout compatibility with adjacent components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (GND) | Ground reference and thermal path | Must be connected to large copper pour for thermal conduction; serves as return for all internal circuitry. |
| Pin 2 (OUT) | Regulated output node | Delivers stable 3.3V; requires ≥2.2µF ceramic capacitor placed adjacent to pin for transient stability. |
| Pin 3 (IN) | Unregulated input supply | Accepts 2.2–6.0V; must be decoupled with ≥1µF ceramic capacitor close to this pin to suppress ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 360mV at 1A enables use with 3.66V minimum input - extends battery runtime in portable 3.3V systems. |
| Low IQ operation | 60µA quiescent current reduces no-load power loss by >5× vs. legacy LDOs, critical for energy-harvesting nodes. |
| Fold-back short-circuit protection | Limits fault current to ~400mA - prevents thermal runaway while allowing safe recovery after fault removal. |
| High PSRR | 75dB @ 1kHz rejects noise from noisy switchers, eliminating need for additional LC filtering in mixed-signal rails. |
| Stable with small MLCCs | Guaranteed stability with ≥2.2µF X5R/X7R ceramic output caps - avoids bulky tantalum or electrolytic capacitors. |
Applications
| Set-Top Box Power Management | LCD TV Timing Controller (TCON) Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 3.3V to video decoder ASICs and HDMI transceivers in set-top boxes powered from 5V DC/DC outputs. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, low-dropout 3.3V bias to high-speed digital interfaces. Use Value: 75dB PSRR suppresses switching noise from upstream 5V buck converter, preventing HDMI jitter and pixel errors. |
Use Scenario: Supplying stable 3.3V to timing controller ICs in LCD TVs, where voltage deviation causes panel gamma shift or flicker. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring precise voltage reference for TCON's internal DACs and LVDS drivers. Use Value: ±1% output accuracy and <100ppm/°C tempco maintain display uniformity across -40°C to +85°C ambient range. |
| Home Appliance Microcontroller Core Rail | Audio Codec Bias Supply |
|
Use Scenario: Powering 3.3V ARM Cortex-M cores in smart washing machine controllers operating from 12V automotive-style inputs. IC Role / Device Role / Timing Role: Low-quiescent-current LDO enabling efficient conversion from intermediate 5V rail to MCU core voltage. Use Value: 60µA IQ minimizes standby power draw, meeting Energy Star requirements for always-on appliance modes. |
Use Scenario: Delivering low-noise 3.3V to stereo audio codecs in soundbars, where supply ripple manifests as audible hiss. IC Role / Device Role / Timing Role: Noise-suppressing post-regulator isolating codec analog section from noisy digital supply domains. Use Value: Ultra-low dropout and high PSRR prevent 1kHz switching artifacts from appearing in audio output spectrum. |
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 |
|---|---|---|---|
| MCP1700-3302E/TO | 300mA max output, 170mV dropout at 250mA, 2.0µA IQ - lower current, much lower IQ, higher dropout at full load. | Suitable only for ultra-low-power microcontrollers (<300mA), not for video/audio loads. | Select when standby current dominates design priority and load current ≤300mA. |
| TLS850F3TBV50 | Automotive-grade (AEC-Q100), 500mA, integrated watchdog and reset - higher reliability, lower current, no enable pin. | Targeted at automotive body electronics; lacks EN control and 1A capability. | Select only for automotive programs requiring PPAP and functional safety support. |
Compared with MCP1700-3302E/TO and TLS850F3TBV50, AP7361C-33DR-13 uniquely balances 1A output, 360mV dropout, and 60µA IQ in a cost-effective industrial-grade package - making it optimal for consumer video/audio power rails where performance and BOM simplicity are prioritized over ultra-low IQ or automotive qualification.
Availability
AP7361C-33DR-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box subsystems, home appliance microcontroller rails, and audio codec biasing requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for AP7361C-33DR-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, with manufacturing certified to IATF16949:2016 and environmental compliance to RoHS 3 and halogen-free standards.
The AP7361C belongs to Diodes' high-performance LDO family targeting consumer, computing, and industrial power management - engineered for low dropout, low IQ, and robust protection in compact packages.
FAQ
What is the minimum input voltage required for AP7361C-33DR-13 to regulate 3.3V at 1A?
The minimum input voltage is 3.66V, calculated as VOUT + VDROPOUT = 3.3V + 0.36V. This value is confirmed in the Electrical Characteristics table under Dropout Voltage (3.3V output, 1A load, typ. 360mV). Operation below this voltage results in unregulated output and potential system brownout.
Can AP7361C-33DR-13 be used without an enable signal?
Yes - tie the EN pin directly to the IN pin to maintain permanent enable. This is explicitly recommended in the Application Information section for packages lacking dedicated ON/OFF control. The EN pin has an internal 3.0MΩ pull-down resistor, so leaving it floating is not advised.
Is AP7361C-33DR-13 stable with a 10µF X5R ceramic output capacitor?
Yes - the device is specified stable with ≥2.2µF MLCCs, and larger values (e.g., 10µF) improve load transient response and reduce output undershoot. The datasheet confirms stability across ceramic, tantalum, and electrolytic types ≥2.2µF, with no ESR restrictions for X5R/X7R dielectrics.
Does AP7361C-33DR-13 require a minimum load current to maintain regulation?
No - the datasheet states "no minimum load is required to keep the device stable." It remains regulated and stable down to zero load current, verified across -40°C to +85°C ambient temperature. This eliminates need for dummy loads in low-power sleep modes.
AP7361C-33DR-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):
- 3.3V
- 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:
- TO-252-3
AP7361C-33DR-13 FAQ
1.How can I place an order for AP7361C-33DR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-33DR-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-33DR-13 reliable?
The price and inventory of AP7361C-33DR-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-33DR-13 is usually 5 days.
3.What payment methods are accepted for AP7361C-33DR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-33DR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-33DR-13?
AP7361C-33DR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-33DR-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-33DR-13?
For technical support, including AP7361C-33DR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-33DR-13 requirements.
6.How does Aetrix verify that AP7361C-33DR-13 is sourced from the original manufacturer or authorized distributors?
All AP7361C-33DR-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-33DR-13 meets industry standards.
7.What is the process for return or replacement of AP7361C-33DR-13?
All AP7361C-33DR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-33DR-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-33DR-13 part is unused and in its original packaging.
Return procedure for AP7361C-33DR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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