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Diodes Incorporated AP2112R5A-3.3TRG1
- Part No.:
- AP2112R5A-3.3TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-89-5/6
- Datasheet:
-
AP2112R5A-3.3TRG1.pdf
- Description:
- IC REG LINEAR 3.3V 600MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:899
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Product details
Overview
AP2112R5A-3.3TRG1 from Diodes Incorporated is a fixed-output 3.3V, 600mA CMOS low-dropout linear regulator with enable control and auto-discharge functionality, delivering ±1.5% output accuracy, 250mV typical dropout at full load, and 50µVRMS output noise - deployed in portable LCD monitors for stable core rail regulation.
For engineers reviewing the AP2112R5A-3.3TRG1 datasheet, AP2112R5A-3.3TRG1 pinout, AP2112R5A-3.3TRG1 application, or AP2112R5A-3.3TRG1 equivalent, key selection criteria include guaranteed 600mA load capability, 0.02%/V line regulation, thermal shutdown at +160°C, and SOT89-5 (R5A) package compatibility with high-thermal-conductivity PCB layouts.
Technical Context
The AP2112R5A-3.3TRG1 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and PMOS pass transistor, enabling fast transient response to load steps up to 600mA while maintaining tight output regulation across -40°C to +85°C ambient.
Its enable logic (VIH ≥1.5V, VIL ≤0.4V) controls both output activation and integrated 60Ω discharge path to ground, while foldback current limiting (50mA short-circuit limit) and thermal shutdown (+160°C trip, +25°C hysteresis) provide robust fault protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% - ensures stable MCU I/O or display logic rail within industrial temperature range. |
| Max Output Current | 600mA minimum - supports sustained operation of mid-power digital subsystems without derating. |
| Dropout Voltage | 250mV typical @600mA - enables regulation from 3.55V input, critical for battery-powered systems near end-of-life. |
| Quiescent Current | 55µA typical - minimizes standby power loss in always-on system management rails. |
| PSRR | -65dB @100Hz/1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 50µVRMS (10Hz–100kHz) - meets low-noise requirements for analog sensor interfaces or RF bias supplies. |
| Thermal Shutdown | +160°C with +25°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
SOT89-5 (R5A) package: 5-pin surface-mount outline with exposed thermal pad (pin 4 = GND), optimized for thermal dissipation in space-constrained applications. Pin 1 = VOUT, Pin 2 = VIN, Pin 3 = EN, Pin 4 = GND, Pin 5 = NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 3.3V output - connects directly to load; requires ≥1.0µF ceramic capacitor for stability. |
| 2 | VIN | Input supply (2.5–6.0V) - must be filtered; dropout behavior defined relative to this node. |
| 3 | EN | Active-high enable - drives high (>1.5V) to activate regulator; pulls low (<0.4V) to disable and engage 60Ω discharge path. |
| 4 | GND | Power ground - shared reference for VIN, VOUT, and EN; electrically tied to thermal pad for heat transfer. |
| 5 | NC | No connection - left unconnected per design; no internal circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 60Ω internal pull-down on VOUT when EN = low - eliminates residual voltage on downstream circuits during shutdown. |
| Stable with 1.0µF output cap | Compatible with ceramic, tantalum, and aluminum electrolytic capacitors - reduces BOM count and board area. |
| Foldback short-circuit protection | 50mA current limit under VOUT = 0V - limits power dissipation during output faults without latch-up. |
| Low standby current | 0.01µA typical - enables multi-year battery life in maintenance-free IoT sensor nodes. |
| High PSRR at audio frequencies | -65dB @100Hz/1kHz - rejects ripple from buck converter switching frequencies and their harmonics. |
Applications
| Portable LCD Monitor Power | Laptop System Management Rail |
|---|---|
Use Scenario: Powering LVDS transmitter ICs and timing controller logic in 10–17″ LCD panels. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying display interface circuitry with fast load transient response. Use Value: 0.2%/A load regulation and 20µs startup time ensure glitch-free panel initialization and brightness transitions. |
Use Scenario: Generating always-on 3.3V rail for embedded controller (EC), keyboard controller, and battery gauge ICs. IC Role / Device Role / Timing Role: Standby-regulator providing ultra-low-quiescent power to system management peripherals. Use Value: 0.01µA standby current extends battery runtime during suspend-to-RAM states without compromising wake responsiveness. |
| Industrial HMI Display Module | USB-C Docking Station Auxiliary Rail |
Use Scenario: Regulating 3.3V for ARM Cortex-M based HMI microcontrollers and touch controller ASICs in factory-floor displays. IC Role / Device Role / Timing Role: Main logic rail LDO with thermal shutdown and wide input range (2.5–6.0V) for unregulated 5V bus inputs. Use Value: +160°C thermal shutdown and ±100ppm/°C tempco maintain functional safety and accuracy over extended operating temperature range. |
Use Scenario: Providing clean 3.3V supply to USB PD policy engine, USB 3.0 hub logic, and status LED drivers in compact docking stations. IC Role / Device Role / Timing Role: Noise-sensitive auxiliary LDO decoupling PD controller from noisy 5V/9V/15V/20V USB-C source rails. Use Value: 50µVRMS output noise and -65dB PSRR prevent communication errors and false LED state changes during high-current charging events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 300mA max output, 1.6µA quiescent current, no enable or discharge function | Limited to ultra-low-power sensors; lacks fast transient support for digital loads | Select only when <300mA load and sub-µA sleep current dominate requirements |
| TLS850B2ELVSE | Automotive-grade AEC-Q100, 500mA, integrated watchdog and reset, higher cost | Designed for automotive body electronics; overqualified for consumer portable devices | Choose only if ISO 26262 functional safety compliance or extended temperature (-40°C to +125°C) is mandatory |
Compared with MCP1700T-3302E/MB and TLS850B2ELVSE, the AP2112R5A-3.3TRG1 uniquely balances 600mA delivery, 55µA quiescent current, and integrated enable/discharge in a cost-optimized industrial-grade SOT89-5 package - making it optimal for portable display and embedded control applications where performance, size, and thermal efficiency are co-prioritized.
Availability
AP2112R5A-3.3TRG1 is available at Aetrix Electronics and suitable for portable LCD monitors, laptop system management rails, industrial HMI modules, and USB-C docking station auxiliary supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AP2112R5A-3.3TRG1 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 for power management, signal integrity, and connectivity applications.
The AP2112 product line delivers high-performance, low-noise LDO regulators targeting portable computing, display, and industrial embedded systems where precision voltage regulation and thermal reliability are essential.
FAQ
What is the minimum input voltage required for AP2112R5A-3.3TRG1 to regulate 3.3V at 600mA?
The minimum input voltage is 3.55V, calculated from the 3.3V nominal output plus the 250mV typical dropout voltage at 600mA load. The datasheet specifies a recommended operating VIN range of 4.3V to 6.0V for 3.3V output, ensuring margin across temperature and process variation while maintaining regulation under worst-case conditions.
Can AP2112R5A-3.3TRG1 operate with a 1.0µF ceramic output capacitor?
Yes - the device is explicitly characterized and guaranteed stable with 1.0µF ceramic (X7R/X5R), tantalum, or aluminum electrolytic capacitors. No ESR requirements apply, simplifying layout and reducing bill-of-materials cost compared to legacy LDOs requiring specific capacitor types or values.
How does the auto-discharge function behave during shutdown?
When the EN pin is driven low (<0.4V), an internal 60Ω resistor connects VOUT to GND, discharging output capacitance rapidly. This prevents floating voltages that could cause unintended logic states or latch-up in downstream circuits, and is confirmed by the RDCHG parameter in the Electrical Characteristics table (page 8).
Is AP2112R5A-3.3TRG1 compatible with lead-free reflow soldering processes?
Yes - the device is fully RoHS-compliant and rated for lead-free reflow with a maximum lead temperature of +260°C for 10 seconds. Its SOT89-5 (R5A) package meets JEDEC J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to assembly.
AP2112R5A-3.3TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-89-5/6
- 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):
- 0.4V @ 600mA
- Current - Output:
- 600mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 65sB (100Hz ~ 1KHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AP2112R5A-3.3TRG1 FAQ
1.How can I place an order for AP2112R5A-3.3TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2112R5A-3.3TRG1 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 AP2112R5A-3.3TRG1 reliable?
The price and inventory of AP2112R5A-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2112R5A-3.3TRG1 is usually 5 days.
3.What payment methods are accepted for AP2112R5A-3.3TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2112R5A-3.3TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2112R5A-3.3TRG1?
AP2112R5A-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2112R5A-3.3TRG1 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 AP2112R5A-3.3TRG1?
For technical support, including AP2112R5A-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2112R5A-3.3TRG1 requirements.
6.How does Aetrix verify that AP2112R5A-3.3TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2112R5A-3.3TRG1 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 AP2112R5A-3.3TRG1 meets industry standards.
7.What is the process for return or replacement of AP2112R5A-3.3TRG1?
All AP2112R5A-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2112R5A-3.3TRG1, 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 AP2112R5A-3.3TRG1 part is unused and in its original packaging.
Return procedure for AP2112R5A-3.3TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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