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Diodes Incorporated AP7361EA-33DR-13
- Part No.:
- AP7361EA-33DR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AP7361EA-33DR-13.pdf
- Description:
- LDO CMOS HICURR TO252 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:4,284
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Product details
Overview
AP7361EA-33DR-13 from Diodes Incorporated is a 1A fixed-output (3.3V), ultra-low dropout linear regulator in TO252 (DPAK) package with enable input, ±1% output accuracy, 360mV dropout at 1A, and 68µA quiescent current-designed for stable power delivery in battery-powered audio/video equipment and LCD monitors.
For engineers reviewing the AP7361EA-33DR-13 datasheet, AP7361EA-33DR-13 pinout, AP7361EA-33DR-13 application, or AP7361EA-33DR-13 equivalent, key selection criteria include dropout voltage at full load, EN logic thresholds, thermal resistance (θJA = 95°C/W), and compatibility with 2.2µF MLCC output capacitors without minimum load requirement.
Technical Context
The AP7361EA-33DR-13 integrates a PMOS pass element, precision 0.8V bandgap reference, and error amplifier to regulate output voltage with high PSRR (75dB @ 1kHz). Its foldback short-circuit protection limits output current to 400mA during fault conditions while maintaining thermal shutdown at 150°C with 20°C hysteresis.
It operates across 2.2V–6.0V input range and delivers regulated 3.3V output with line regulation of 0.1%/V and load regulation of ±1.0% over 1.2V–3.3V outputs. The EN pin requires VIH ≥ 1.0V and VIL ≤ 0.3V for reliable on/off control, and the device remains stable with ≥2.2µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures precise rail generation for USB-powered peripherals and HDMI interface logic. |
| Max Output Current | 1.0A continuous - supports moderate-power digital subsystems such as display timing controllers and audio DACs. |
| Dropout Voltage | 360mV at 1A (3.3V out) - enables operation from single-cell Li-ion (3.0V min) or 3.3V/5V system rails with margin. |
| Quiescent Current | 68µA typical - minimizes standby power loss in always-on monitoring circuits and remote controls. |
| 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. |
| Enable Threshold | VIH = 1.0V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
AP7361EA-33DR-13 uses the TO252 (DPAK)R package with exposed thermal pad (EP), optimized for surface-mount thermal management on 2oz copper PCBs. Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT, Pin 4 = EN. The EP must be connected to GND via thermal vias for θJA = 95°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Bypassed with ≥1µF ceramic capacitor close to pin; supports 2.2–6.0V input range. |
| 2 (GND) | Power ground reference | Common return for input/output capacitors and thermal pad; low-impedance path critical for stability. |
| 3 (OUT) | Regulated output node | Requires ≥2.2µF MLCC; no minimum load needed; output discharge resistor (100Ω) aids fast turn-off. |
| 4 (EN) | Active-high enable control | Pulled high to enable; pulled low or left floating (via internal 3MΩ pull-down) disables output and reduces IQ to 0.05µA. |
| EP (Exposed Pad) | Thermal dissipation path | Must be soldered to large GND copper area with ≥4 thermal vias; not electrically functional as GND electrode alone. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 360mV at 1A enables use with tight input-output margins, e.g., 3.6V Li-ion → 3.3V logic rail. |
| Foldback short-circuit protection | Limits output to 400mA during hard shorts, preventing thermal runaway and enabling safe auto-recovery. |
| Stable with small MLCCs | Operates reliably with ≥2.2µF ceramic output caps-eliminates need for bulky electrolytics in space-constrained designs. |
| Low-noise enable control | EN pin leakage <0.1µA and internal 3MΩ pull-down allow direct MCU GPIO drive without external resistors. |
| Wide temperature operation | -40°C to +85°C ambient range supports industrial displays, set-top boxes, and home appliance control boards. |
Applications
| Smart TV Power Rails | USB-C Peripheral Regulator |
|---|---|
Use Scenario: Providing clean 3.3V supply to HDMI receiver ICs and panel timing controllers in 4K smart TVs. IC Role / Device Role / Timing Role: Primary post-regulator for noise-sensitive video signal chain components requiring low PSRR and fast transient response. Use Value: 75dB PSRR at 1kHz rejects switching noise from upstream 12V→5V buck converter; 150µs start-up time synchronizes with display controller boot sequence. | Use Scenario: Generating stable 3.3V from USB-C PD 5V source for embedded microcontrollers and sensors in portable accessories. IC Role / Device Role / Timing Role: Low-quiescent-current LDO enabling >100-hour battery life in BLE-enabled dongles and adapters. Use Value: 68µA IQ extends runtime in always-on monitoring mode; 360mV dropout preserves headroom when input drops to 3.6V under cable loss. |
| Set-Top Box Audio Subsystem | Industrial Display Backlight Control |
Use Scenario: Powering audio DACs, op-amps, and SPDIF transceivers in satellite/cable set-top boxes. IC Role / Device Role / Timing Role: Low-noise analog supply rail isolating sensitive audio circuitry from noisy digital domains. Use Value: ±1% output accuracy maintains THD+N spec; thermal shutdown protects against enclosure overheating during extended playback. | Use Scenario: Supplying gate drivers and LED current sources in outdoor kiosk displays operating in wide-temperature environments. IC Role / Device Role / Timing Role: Robust main 3.3V rail for backlight control logic where reliability under thermal stress is critical. Use Value: 95°C/W θJA and 150°C thermal shutdown prevent latch-up in sealed enclosures; TO252 package withstands reflow and mechanical vibration. |
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-3302E/MB | 300mA max output, 600mV dropout at 250mA, no EN pin, SOT-23 package | Suitable only for low-current logic rails; lacks enable control and thermal shutdown hysteresis | Select only if load current ≤300mA and system-level enable is handled externally. |
| Torex XC6210B332MR-G | 1A output, 250mV dropout at 1A, 25µA IQ, SOT-25 package, no thermal shutdown | Lower dropout and IQ but missing fault protection-requires external thermal monitoring | Prefer for ultra-low-power battery apps where thermal risk is mitigated by enclosure design. |
Compared with MCP1703T-3302E/MB and XC6210B332MR-G, AP7361EA-33DR-13 uniquely combines 1A capability, 360mV dropout, integrated EN, thermal shutdown with hysteresis, and TO252 thermal robustness-making it optimal for medium-power industrial and consumer displays where reliability under load and temperature stress is non-negotiable.
Availability
AP7361EA-33DR-13 is available at Aetrix Electronics and suitable for LCD monitor power supplies, set-top box audio subsystems, and USB-C peripheral regulators requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361EA-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 devices, with emphasis on power management, signal integrity, and protection solutions.
The AP7361EA belongs to Diodes' high-performance LDO family targeting space-constrained, thermally demanding applications in consumer electronics and industrial displays-designed for ultra-low dropout, low IQ, and robust fault protection without external components.
FAQ
What is the minimum input voltage required for AP7361EA-33DR-13 to maintain regulation at 1A load?
The minimum input voltage is calculated as VOUT + VDROPOUT = 3.3V + 0.36V = 3.66V. However, per datasheet Recommended Operating Conditions, VIN must be ≥2.2V; regulation is guaranteed only when VIN ≥ VOUT + dropout voltage (360mV typ). At 1A, 3.66V input ensures stable 3.3V output across -40°C to +85°C ambient.
Can AP7361EA-33DR-13 operate without an external output capacitor?
No. The device requires ≥2.2µF ceramic output capacitance for stability, as confirmed in the Electrical Characteristics table and Application Information section. Omitting COUT causes oscillation and unregulated output. MLCC, tantalum, or polymer capacitors ≥2.2µF with ESR <100mΩ are acceptable; no minimum ESR is specified.
Is the exposed pad (EP) on the TO252 package electrically connected to GND?
The exposed pad is thermally conductive but not internally bonded to any electrical node. Per datasheet Pin Descriptions, it must be connected to PCB GND plane via thermal vias for heat dissipation, but it serves no electrical function beyond thermal conduction. It must not be used as the sole GND connection point for the device.
Does AP7361EA-33DR-13 support adjustable output voltage configurations?
No. The "-33" suffix denotes fixed 3.3V output. Adjustable versions use "-ADJ" suffix (e.g., AP7361EA-ADJDR-13) and require external resistor divider on ADJ pin. This part has ADJ pin internally tied off and is not configurable-output is factory-trimmed to 3.3V ±1%.
AP7361EA-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):
- 0.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 91 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
AP7361EA-33DR-13 FAQ
1.How can I place an order for AP7361EA-33DR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361EA-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 AP7361EA-33DR-13 reliable?
The price and inventory of AP7361EA-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 AP7361EA-33DR-13 is usually 5 days.
3.What payment methods are accepted for AP7361EA-33DR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361EA-33DR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361EA-33DR-13?
AP7361EA-33DR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361EA-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 AP7361EA-33DR-13?
For technical support, including AP7361EA-33DR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361EA-33DR-13 requirements.
6.How does Aetrix verify that AP7361EA-33DR-13 is sourced from the original manufacturer or authorized distributors?
All AP7361EA-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 AP7361EA-33DR-13 meets industry standards.
7.What is the process for return or replacement of AP7361EA-33DR-13?
All AP7361EA-33DR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361EA-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 AP7361EA-33DR-13 part is unused and in its original packaging.
Return procedure for AP7361EA-33DR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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