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Diodes Incorporated AP7361C-18ER-13
- Part No.:
- AP7361C-18ER-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361C-18ER-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT223R
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
AP7361C-18ER-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 portable electronics. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 1.8V dropout is 440mV typ), and 60µA quiescent current - enabling efficient battery-powered operation in LCD-TVs, set-top boxes, and home appliances.
For engineers reviewing the AP7361C-18ER-13 datasheet, AP7361C-18ER-13 pinout, AP7361C-18ER-13 application, or AP7361C-18ER-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 compatibility with 2.2µF MLCC output capacitors without external compensation.
Technical Context
The AP7361C-18ER-13 integrates a PMOS pass element, band-gap reference, error amplifier, and fold-back current limiting. Its fixed 1.8V output is internally trimmed, eliminating external resistors while maintaining 0.792–0.808V reference voltage stability across temperature.
Enable functionality is implemented via a high-impedance EN input (3.0MΩ internal pull-down) with defined VIH (1.0V min) and VIL (0.3V max); it supports direct microcontroller GPIO control without level-shifting. Thermal shutdown activates at 150°C with 20°C hysteresis, enabling safe cycling under overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures stable core voltage for 1.8V I/O rails in SoCs and FPGAs. |
| Max Output Current | 1.0A continuous - supports moderate-power digital loads like HDMI transceivers or audio codecs. |
| Dropout Voltage | 440mV typical at 1A (1.8V output) - enables operation from 2.2V input, compatible with single-cell LiFePO₄ or dual-cell alkaline sources. |
| Quiescent Current | 60µA typical - minimizes standby power loss in always-on subsystems (e.g., remote control receivers). |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - prevents permanent damage during sustained overloads or poor PCB heatsinking. |
| Input Voltage Range | 2.2V to 6.0V - accommodates wide-input industrial supplies and battery chemistries including Li-ion (max 4.2V) and USB PD (5V). |
Pinout & Package
AP7361C-18ER-13 is packaged in SOT223R - a 3-pin thermally enhanced variant with reversed pinout (Pin 1: GND, Pin 2: OUT, Pin 3: IN) optimized for low thermal resistance (θJA = 110°C/W) on standard FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (GND) | Power ground reference | Must be connected to low-impedance system ground plane; serves as return path for both input and output currents. |
| Pin 2 (OUT) | Regulated output | Delivers 1.8V ±1%; requires ≥2.2µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| Pin 3 (IN) | Unregulated input | Accepts 2.2–6.0V; requires ≥1µF ceramic bypass capacitor near pin to suppress supply noise and prevent oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 440mV at 1A (1.8V output) - extends usable battery life by enabling regulation down to 2.24V input. |
| Enable control | Active-high EN with 1.0V VIH min - allows direct interfacing with 1.8V/3.3V logic without external level shifters. |
| Fold-back short-circuit protection | Limits output to ~400mA during hard shorts - prevents thermal runaway while permitting automatic recovery when fault clears. |
| Stability with small capacitors | Guaranteed stable with ≥2.2µF MLCC - eliminates need for bulky electrolytics and reduces board area in compact designs. |
| Green packaging | Halogen- and antimony-free, RoHS-compliant - meets environmental compliance requirements for consumer and industrial markets. |
Applications
| Smart TV Power Management | Set-Top Box Core Rail |
|---|---|
|
Use Scenario: Providing clean 1.8V supply to HDMI controller ICs and video processing SoCs in 4K smart TVs. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, tightly regulated voltage to sensitive digital interfaces. Use Value: 75dB PSRR at 1kHz suppresses ripple from upstream buck converters, preventing pixel noise and HDMI link instability. |
Use Scenario: Powering 1.8V I/O banks of ARM-based media processors in cable/satellite set-top boxes. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring voltage compliance for high-speed parallel buses and DDR memory interfaces. Use Value: ±1% output accuracy maintains timing margins across temperature, avoiding setup/hold violations in synchronous logic. |
| IoT Gateway Baseband | Home Appliance MCU Core |
|
Use Scenario: Supplying 1.8V to RF transceiver baseband sections in Wi-Fi 6/Bluetooth 5 gateways. IC Role / Device Role / Timing Role: Low-quiescent-current regulator supporting deep-sleep modes while enabling fast wake-up. Use Value: 60µA IQ enables >1-year battery life in coin-cell-powered edge nodes without compromising startup time (200µs). |
Use Scenario: Regulating 1.8V for microcontroller cores in smart refrigerators and washing machines. IC Role / Device Role / Timing Role: Industrial-grade LDO with -40°C to +85°C operation and thermal shutdown for harsh ambient environments. Use Value: 150°C thermal shutdown protects against failure during motor drive EMI-induced heating or enclosure overheating. |
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 |
|---|---|---|---|
| MCP1700-1802E/TO | 300mA max output, 170mV dropout at 250mA (1.8V), 2.0µA IQ - lower current, much lower IQ, higher dropout. | Suitable only for ultra-low-power sensor nodes; insufficient for 1A loads like video processors. | Select only if load current ≤300mA and standby IQ <5µA is critical; not a drop-in replacement. |
| TLS850F18TAV50 | Automotive-grade (AEC-Q100), 500mA, integrated watchdog and reset - higher reliability, lower current, no EN pin. | Designed for automotive body electronics; lacks enable control and exceeds required current capability. | Choose only for automotive programs requiring PPAP and functional safety; over-specified for consumer appliances. |
Compared with MCP1700-1802E/TO and TLS850F18TAV50, the AP7361C-18ER-13 uniquely balances 1A delivery, 440mV dropout at 1.8V, and 60µA IQ - making it optimal for cost-sensitive, thermally constrained 1.8V rail generation in consumer electronics where automotive qualification is unnecessary.
Availability
AP7361C-18ER-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box core rails, and home appliance MCU core regulation requiring stable component supply across production volumes and extended lifecycle planning.
Supply support for AP7361C-18ER-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7361C belongs to Diodes' precision LDO family targeting space-constrained, battery-sensitive applications - emphasizing ultra-low dropout, low IQ, and robust fault protection without external components.
FAQ
What is the minimum input voltage required for AP7361C-18ER-13 to maintain 1.8V regulation 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 full 1A regulation at 1.8V requires ≥2.24V to stay within dropout margin. Below this, output voltage sags proportionally.
Can AP7361C-18ER-13 be used without connecting the EN pin?
Yes - the EN pin has an internal 3.0MΩ pull-down resistor. Leaving it unconnected defaults the device to enabled state. However, for guaranteed startup in noisy environments, tie EN directly to IN. Do not float EN in systems with high EMI or long traces.
Is an external capacitor required on the ADJ pin for AP7361C-18ER-13?
No - the "-18" suffix indicates fixed 1.8V output; the ADJ pin is internally connected and unused. In SOT223R package, Pin 4 is NC (no connection), not ADJ. External resistors or capacitors on ADJ are unnecessary and must be omitted.
Does AP7361C-18ER-13 require a minimum load current for stability?
No - the device remains stable and regulated with zero load current. The datasheet explicitly states "no minimum load is required." This enables use in standby circuits where downstream logic may be fully powered down while the LDO remains active.
AP7361C-18ER-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223R
AP7361C-18ER-13 FAQ
1.How can I place an order for AP7361C-18ER-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-18ER-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-18ER-13 reliable?
The price and inventory of AP7361C-18ER-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-18ER-13 is usually 5 days.
3.What payment methods are accepted for AP7361C-18ER-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-18ER-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-18ER-13?
AP7361C-18ER-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-18ER-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-18ER-13?
For technical support, including AP7361C-18ER-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-18ER-13 requirements.
6.How does Aetrix verify that AP7361C-18ER-13 is sourced from the original manufacturer or authorized distributors?
All AP7361C-18ER-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-18ER-13 meets industry standards.
7.What is the process for return or replacement of AP7361C-18ER-13?
All AP7361C-18ER-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-18ER-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-18ER-13 part is unused and in its original packaging.
Return procedure for AP7361C-18ER-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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