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Diodes Incorporated AP2112R5-1.8TRG1
- Part No.:
- AP2112R5-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-89-5/6
- Datasheet:
-
AP2112R5-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 600MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,538
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Product details
Overview
AP2112R5-1.8TRG1 from Diodes Incorporated is a fixed-output 1.8V, 600mA CMOS low-dropout linear regulator in SOT89-5 (R5) package with enable control, ±1.5% output accuracy, and auto-discharge function (60Ω pull-down to GND when disabled). It delivers stable power for core logic rails in space-constrained portable electronics requiring fast transient response and ultra-low quiescent current.
For engineers reviewing the AP2112R5-1.8TRG1 datasheet, AP2112R5-1.8TRG1 pinout, AP2112R5-1.8TRG1 application, or AP2112R5-1.8TRG1 equivalent, key selection criteria include dropout voltage at 600mA (500mV typ.), load regulation (0.2%/A), PSRR (-65dB @ 100Hz/1kHz), thermal shutdown threshold (+160°C), and compatibility with 1.0µF ceramic, tantalum, or aluminum electrolytic output capacitors.
Technical Context
The AP2112R5-1.8TRG1 implements a CMOS-based LDO architecture with internal reference, error amplifier, and pass transistor, optimized for high PSRR and low noise (50µVRMS). Its enable input (EN) provides precise system-level power sequencing control, while the integrated auto-discharge circuit actively pulls VOUT to GND via 60Ω during shutdown.
It operates across -40°C to +85°C ambient, supports input voltages from 2.8V to 6.0V, and maintains regulation under full 600mA load with dropout as low as 500mV - enabling use with Li-ion or multi-cell battery sources where headroom is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.5% - ensures tight tolerance for 1.8V I/O or core supply rails without external feedback. |
| Max Output Current | 600mA minimum - sustains full-load operation for microcontrollers, FPGAs, and interface ICs. |
| Dropout Voltage | 500mV typical @ 600mA - allows operation with VIN as low as 2.3V, supporting single-cell LiFePO₄ or dual-cell alkaline inputs. |
| Quiescent Current | 55µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or sensor hubs. |
| PSRR | -65dB @ 100Hz and 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 50µVRMS (10Hz–100kHz) - preserves signal integrity in analog front-ends and RF bias supplies. |
| Enable Threshold | VIL ≤ 0.4V, VIH ≥ 1.5V - compatible with 1.8V/3.3V GPIOs for direct microcontroller control. |
| Thermal Shutdown | +160°C with +25°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT89-5 (R5) package: 5-pin thermally enhanced plastic surface-mount package with exposed pad for improved heat dissipation (θJA = 120°C/W, θJC = 47°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8V output - connects directly to load; requires 1.0µF ceramic capacitor (X7R/X5R) for stability. |
| 2 | VIN | Input supply (2.8V–6.0V) - must be filtered with 1.0µF ceramic capacitor close to pin. |
| 3 | NC | No connection - electrically isolated; no PCB trace or solder required. |
| 4 | GND | Power ground - ties to system ground plane; shares thermal pad for heat transfer. |
| 5 | EN | Active-high enable - drives high (>1.5V) to activate regulator; pulled low (<0.4V) disables output and engages 60Ω discharge path. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on disable | 60Ω internal pull-down from VOUT to GND eliminates residual voltage, preventing unintended wake-up or latch-up in downstream circuits. |
| Stable with 1.0µF output cap | Supports ceramic, tantalum, and aluminum electrolytic capacitors - reduces BOM count and board area vs. legacy LDOs requiring ≥10µF. |
| Foldback short-circuit protection | 50mA current limit during output short - limits power dissipation and enables safe recovery after fault removal. |
| Low standby current | 0.01µA typical - extends battery life in deep-sleep modes of portable devices. |
| ESD robustness | 4000V HBM - withstands handling and assembly without additional protection circuitry. |
| Lead-free & green compliance | Fully RoHS-compliant, halogen- and antimony-free - meets global environmental regulations and OEM sustainability requirements. |
Applications
| Mobile SSD Controller Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM buffer in M.2 SATA SSDs with tight thermal constraints and burst current demands. IC Role / Device Role / Timing Role: Primary 1.8V core regulator supplying digital logic and memory interfaces; sequenced after main 3.3V rail via EN pin. Use Value: 600mA capability and 500mV dropout ensure stable operation during 1.8V rail transients; 50µVRMS noise prevents bit errors in high-speed data paths. | Use Scenario: Supplies isolated 1.8V logic for RS-485 transceivers and ADC reference buffers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling noisy industrial bus power; enabled only during active communication cycles. Use Value: -65dB PSRR rejects coupled noise from 24V DC-DC converters; auto-discharge prevents false triggering during hot-swap events. |
| Wearable Sensor Hub | Automotive Infotainment MCU Core |
Use Scenario: Provides clean 1.8V supply to ultra-low-power ARM Cortex-M0+ MCU and MEMS motion sensors in fitness trackers. IC Role / Device Role / Timing Role: Always-on regulator for real-time sensor fusion; EN controlled by host MCU to gate power during sleep. Use Value: 55µA quiescent current and 0.01µA standby minimize battery drain; ±1.5% accuracy maintains timing margin for sensor sampling clocks. | Use Scenario: Delivers 1.8V core voltage to automotive-grade microcontrollers in head-unit applications operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Secondary LDO following primary 5V/3.3V PMIC; EN synchronized with system power-on reset sequence. Use Value: +160°C thermal shutdown protects against under-hood temperature excursions; 0.2%/A load regulation maintains voltage stability during CPU load changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826T-1802E/DB | Same 1.8V/600mA rating but higher dropout (650mV @ 600mA); no auto-discharge; SOT-23-5 package. | Lacks VOUT discharge path - unsuitable where residual voltage must be cleared during shutdown. | Select when board space is critical and discharge is handled externally. |
| Torex XC6219B182MR-G | 1.8V/300mA; lower quiescent current (2.5µA); no thermal shutdown; SOT-25 package. | Half the output current and missing OTSD - inadequate for 600mA loads or high-ambient environments. | Choose only for ultra-low-power, sub-300mA applications with strict IQ budget. |
Compared with MCP1826T-1802E/DB and XC6219B182MR-G, the AP2112R5-1.8TRG1 uniquely combines 600mA delivery, 500mV dropout, integrated 60Ω discharge, and +160°C thermal protection in a thermally optimized SOT89-5 package - making it the only option meeting all four requirements simultaneously for demanding portable and industrial designs.
Availability
AP2112R5-1.8TRG1 is available at Aetrix Electronics and suitable for mobile SSD controller power, industrial PLC I/O modules, wearable sensor hubs, and automotive infotainment MCU core supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP2112R5-1.8TRG1 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 AP2112 product line delivers high-performance, low-noise LDO regulators targeting portable electronics and space-constrained embedded systems where efficiency, precision, and thermal resilience are critical.
FAQ
What is the minimum input voltage required for AP2112R5-1.8TRG1 to regulate at full 600mA load?
The AP2112R5-1.8TRG1 requires VIN ≥ 2.3V to maintain 1.8V output at 600mA, based on its typical 500mV dropout voltage. The datasheet specifies a recommended minimum VIN of 2.8V to ensure margin across process, voltage, and temperature variations - this guarantees regulation over the full -40°C to +85°C range and 600mA load.
Can AP2112R5-1.8TRG1 operate with a 1.0µF X7R ceramic capacitor on the output?
Yes - the AP2112R5-1.8TRG1 is explicitly characterized and guaranteed stable with 1.0µF X7R or X5R ceramic capacitors, as noted in the datasheet's "Stable with 1.0µF Flexible Cap" feature. This eliminates the need for larger, less reliable electrolytic capacitors and reduces PCB footprint compared to legacy LDOs requiring ≥10µF.
How does the auto-discharge function behave when EN is pulled low?
When EN is driven below 0.4V, the AP2112R5-1.8TRG1 disables the pass transistor and activates an internal 60Ω resistor between VOUT and GND. This discharges the output capacitor rapidly - typically within tens of microseconds depending on COUT value - ensuring VOUT reaches near-zero volts to prevent back-powering or unintended activation of downstream circuitry.
Is AP2112R5-1.8TRG1 qualified for automotive applications?
No - the AP2112R5-1.8TRG1 is specified for industrial temperature range (-40°C to +85°C) and is not AEC-Q200 qualified. While it may function in some automotive infotainment subsystems, Diodes Incorporated does not guarantee performance or reliability under automotive qualification stress tests (e.g., temperature cycling, vibration, ESD beyond HBM 4000V), and no automotive-grade part number or PPAP documentation is provided.
AP2112R5-1.8TRG1 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 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
AP2112R5-1.8TRG1 FAQ
1.How can I place an order for AP2112R5-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2112R5-1.8TRG1 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 AP2112R5-1.8TRG1 reliable?
The price and inventory of AP2112R5-1.8TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2112R5-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2112R5-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2112R5-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2112R5-1.8TRG1?
AP2112R5-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2112R5-1.8TRG1 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 AP2112R5-1.8TRG1?
For technical support, including AP2112R5-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2112R5-1.8TRG1 requirements.
6.How does Aetrix verify that AP2112R5-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2112R5-1.8TRG1 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 AP2112R5-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2112R5-1.8TRG1?
All AP2112R5-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2112R5-1.8TRG1, 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 AP2112R5-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2112R5-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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