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Diodes Incorporated AP7361C-18SP-13
- Part No.:
- AP7361C-18SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP7361C-18SP-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:342
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Product details
Overview
AP7361C-18SP-13 from Diodes Incorporated is a 1A fixed-output (1.8V) ultra-low dropout linear regulator with enable, designed for power rail regulation in space-constrained systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V version; 1.8V dropout is 440mV typ), and 60µA quiescent current, making it suitable for battery-powered audio/video modules and LCD-TVs requiring stable low-voltage bias.
For engineers reviewing the AP7361C-18SP-13 datasheet, AP7361C-18SP-13 pinout, AP7361C-18SP-13 application, or AP7361C-18SP-13 equivalent, key selection criteria include dropout voltage at 1.8V output, EN pin logic thresholds (VIH = 1.0V min), thermal shutdown threshold (150°C), and SO-8EP package thermal resistance (θJA = 100°C/W).
Technical Context
The AP7361C-18SP-13 integrates a PMOS pass element, band-gap reference, error amplifier, and fold-back current limiting. Its fixed 1.8V output eliminates external resistor divider requirements while retaining full enable control via the EN pin.
It operates across 2.2V–6.0V input range, supports MLCC/ECap/Tan-Cap ≥2.2µF output capacitors, and features 75dB PSRR at 1kHz-critical for noise-sensitive analog rails in set-top boxes and home appliances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures precise core logic or I/O rail compliance without external feedback components. |
| Max Output Current | 1.0A - sufficient to power SoC I/O domains or FPGA auxiliary rails under transient load. |
| Dropout Voltage | 440mV typical at 1A (1.8V out) - enables operation from 2.24V input, supporting single-cell LiFePO₄ or dual-cell alkaline sources. |
| Quiescent Current | 60µA typical - minimizes standby power loss in always-on subsystems like remote control receivers. |
| 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
AP7361C-18SP-13 is packaged in SO-8EP (exposed pad), a thermally enhanced 8-pin surface-mount package with GND-connected thermal pad for improved heat dissipation (θJA = 100°C/W). Pin 1 is IN, Pin 2 is GND, Pin 3 is OUT, Pin 4 is NC, Pin 5 is ADJ/NC (no connection in fixed version), Pin 6 is EN, Pin 7 is NC, Pin 8 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.2V–6.0V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for stability. |
| 2, 8 (GND) | Power ground reference | Dual GND pins reduce ground impedance; thermal pad must be soldered to PCB ground plane for thermal performance. |
| 3 (OUT) | Regulated output | Delivers stable 1.8V; requires ≥2.2µF ceramic capacitor directly between OUT and GND for transient response. |
| 6 (EN) | Active-high enable control | Pull high ≥1.0V to activate regulator; pull low ≤0.3V to enter <1µA shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 440mV at 1A (1.8V out) - enables higher efficiency and wider input margin than standard PNP-based LDOs. |
| Fold-back short-circuit protection | Limits output to ~400mA during hard short - prevents thermal runaway while allowing safe recovery when fault clears. |
| Stable with low-ESR capacitors | Compatible with MLCC, solid polymer, and electrolytic ≥2.2µF - eliminates need for specialized compensation networks. |
| Low IQ with fast start-up | 60µA quiescent current + 150µs typical start-up time - balances battery life and system responsiveness in portable devices. |
Applications
| Set-Top Box Power Rails | LCD-TV Logic Supply |
|---|---|
|
Use Scenario: Regulating 1.8V supply for HDMI receiver ICs and video decoder SoCs in consumer STBs. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 1.8V to digital signal processing blocks. Use Value: 75dB PSRR at 1kHz rejects noise from upstream buck converters, preventing video artifacts and packet errors. |
Use Scenario: Providing stable 1.8V bias to TCON (timing controller) and LVDS transmitter ICs in mid-size LCD panels. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring tight voltage tolerance for display interface timing integrity. Use Value: ±1% output accuracy maintains pixel clock stability and reduces frame sync jitter in 1080p/4K displays. |
| Home Appliance MCU Core | Audio DAC Bias Supply |
|
Use Scenario: Powering 1.8V core rails of ARM Cortex-M microcontrollers in smart washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-quiescent-current LDO enabling energy-efficient deep-sleep modes. Use Value: 60µA IQ extends battery backup runtime during AC power loss, supporting real-time clock and sensor monitoring. |
Use Scenario: Supplying ultra-clean 1.8V to stereo audio DACs in Bluetooth speakers and soundbars. IC Role / Device Role / Timing Role: Noise-suppressing post-regulator isolating sensitive analog audio circuitry. Use Value: 360mV dropout (at 3.3V) and low thermal drift (±100ppm/°C) preserve SNR across temperature and load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250mA max output, 6µA IQ, SOT-23 package - lower current, lower IQ, no EN pin. | Suitable only for ultra-low-power MCU peripherals; insufficient for 1A loads like TCONs or SoC I/O. | Select only if load current ≤250mA and EN functionality is unnecessary. |
| TPL7407LDR | 500mA max, 2.5µA IQ, 7-channel high-side driver with integrated LDO - not a standalone regulator. | Designed for LED/relay driving; lacks precision output accuracy and thermal shutdown robustness. | Not a functional substitute - intended for different system-level integration. |
Compared with MCP1700-1802E/TO and TPL7407LDR, AP7361C-18SP-13 uniquely combines 1A capability, ±1% accuracy, EN control, and SO-8EP thermal performance - essential for mid-power digital logic and display subsystems where headroom and reliability are non-negotiable.
Availability
AP7361C-18SP-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box SoC biasing, and home appliance MCU core supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361C-18SP-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 "Green" standards.
AP7361C belongs to Diodes' high-performance LDO family targeting space-constrained, battery-sensitive applications-designed to replace legacy regulators with superior dropout, PSRR, and thermal resilience in consumer and industrial power systems.
FAQ
What is the minimum input voltage required for AP7361C-18SP-13 to regulate 1.8V at 1A?
The minimum input voltage is calculated as VOUT + VDROPOUT = 1.8V + 0.44V = 2.24V. Per datasheet specifications, the device operates down to 2.2V input, but at 1A load and 1.8V output, VIN must exceed 2.24V to maintain regulation. Below this, dropout occurs and output voltage drops proportionally.
Can AP7361C-18SP-13 be used without an output capacitor?
No. The datasheet explicitly requires ≥2.2µF ceramic output capacitance for stability. Omitting COUT causes oscillation and potential damage due to phase margin loss. The device is optimized for low-ESR MLCCs, and using zero capacitance violates absolute operating conditions.
Is the EN pin internally pulled down in AP7361C-18SP-13?
No. The EN pin has no internal pull-down. The datasheet specifies RENPD = 3.0MΩ (typical) as an external pull-down recommendation. Leaving EN floating risks undefined startup behavior; it must be actively driven high or tied to IN via a resistor for default-on operation.
Does AP7361C-18SP-13 support reverse polarity protection?
No. The device lacks reverse-voltage protection circuitry. Applying negative voltage to IN or OUT relative to GND exceeds Absolute Maximum Ratings (–0.3V on any pin) and may cause latch-up or permanent damage. External protection diodes are required in systems prone to reverse connection.
AP7361C-18SP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.57V @ 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:
- 8-SO-EP
AP7361C-18SP-13 FAQ
1.How can I place an order for AP7361C-18SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-18SP-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-18SP-13 reliable?
The price and inventory of AP7361C-18SP-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-18SP-13 is usually 5 days.
3.What payment methods are accepted for AP7361C-18SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-18SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-18SP-13?
AP7361C-18SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-18SP-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-18SP-13?
For technical support, including AP7361C-18SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-18SP-13 requirements.
6.How does Aetrix verify that AP7361C-18SP-13 is sourced from the original manufacturer or authorized distributors?
All AP7361C-18SP-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-18SP-13 meets industry standards.
7.What is the process for return or replacement of AP7361C-18SP-13?
All AP7361C-18SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-18SP-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-18SP-13 part is unused and in its original packaging.
Return procedure for AP7361C-18SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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