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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP2112R5-2.6TRG1

Name: AP2112R5-2.6TRG1
Brand: Diodes Incorporated
SKU: AP2112R5-2.6TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2112R5-2.6TRG1

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: SOT-89-5/6

Datasheet:: AP2112R5-2.6TRG1.pdf

Description:: IC REG LINEAR 2.6V 600MA SOT89-5

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Product details

Overview

AP2112R5-2.6TRG1 from Diodes Incorporated is a fixed-output 2.6V, 600mA CMOS low-dropout linear regulator with enable control and auto-discharge functionality, designed for space-constrained power rails in portable electronics requiring ±1.5% output accuracy, 250mV dropout at full load, and 50µV_RMS output noise.

For engineers reviewing the AP2112R5-2.6TRG1 datasheet, AP2112R5-2.6TRG1 pinout, AP2112R5-2.6TRG1 application, or AP2112R5-2.6TRG1 equivalent, this device serves as a precision, low-quiescent-current (55µA typ.) LDO for stable 2.6V supply generation in battery-powered systems with fast transient response and thermal shutdown protection.

Technical Context

The AP2112R5-2.6TRG1 implements a CMOS-based feedback loop with internal 3MΩ reference divider and foldback current limiting (50mA short-circuit limit), enabling robust operation under load transients and fault conditions. Its auto-discharge circuit connects VOUT to GND via 60Ω when EN is low, ensuring rapid output decay during shutdown.

It operates across –40°C to +85°C ambient temperature, supports input voltages from 2.5V to 6.0V, and maintains regulation with only 1.0µF ceramic, tantalum, or aluminum electrolytic output capacitance-no external compensation required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.6V ±1.5% - ensures stable core voltage for 2.6V logic or analog subsystems without external resistors.
Max Output Current	600mA min. - sufficient to power microcontrollers, sensors, or RF modules in portable devices.
Dropout Voltage	250mV typ. @ 600mA - enables operation from 2.85V input (e.g., single Li-ion cell post-regulation) while maintaining 2.6V output.
Quiescent Current	55µA typ. - minimizes standby power loss in always-on circuits like real-time clocks or wake-up controllers.
PSRR	–65dB @ 100Hz/1kHz - suppresses ripple from noisy switching supplies feeding the LDO input.
Output Noise	50µV_RMS (10Hz–100kHz) - low enough for noise-sensitive analog circuits such as ADC references or audio amplifiers.
Enable Threshold	V_IL ≤ 0.4V, V_IH ≥ 1.5V - compatible with standard 1.8V/3.3V GPIO logic levels for precise ON/OFF 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 surface-mount package with exposed thermal pad (pin 3 NC in R5 variant); footprint optimized for high thermal dissipation in compact layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	VOUT	Main regulated output; connects directly to load and output capacitor (min. 1.0µF).
2	VIN	Input supply (2.5–6.0V); requires local 1.0µF ceramic decoupling capacitor.
3	NC	No connection - electrically isolated; must not be tied to any net or ground.
4	GND	Power ground return; ties to PCB ground plane and input/output capacitor negatives.
5	EN	Active-high enable; drives high (>1.5V) to activate regulator, low (<0.4V) to disable with 60Ω discharge path to GND.

Key Features

Feature	Design Value
Auto-discharge function	60Ω internal pull-down on VOUT when EN = low - eliminates residual voltage hold-up, critical for safe system reset sequencing.
Stable with 1.0µF output cap	Compatible with ceramic, tantalum, and aluminum electrolytic capacitors - reduces BOM count and board area vs. traditional LDOs requiring ≥10µF.
Foldback short-circuit protection	50mA current limit during output short - limits power dissipation and prevents thermal runaway during fault events.
Low standby current	0.01µA typ. - enables multi-year battery life in maintenance-free IoT endpoints with periodic wake-up cycles.
High PSRR at low frequency	–65dB @ 100Hz - effectively attenuates switching noise from upstream DC-DC converters operating at typical 100–500kHz frequencies.
Wide input voltage range	2.5V to 6.0V - supports direct connection to single-cell Li-ion (3.0–4.2V), USB 5V, or dual-cell alkaline inputs.

Applications

Portable Medical Sensors

LCD Bias Supply

Use Scenario: Powering ultra-low-power glucose monitors or pulse oximeters powered by coin cells or small Li-ion batteries.

IC Role / Device Role / Timing Role: Primary 2.6V rail generator for analog front-end and MCU core, activated only during measurement cycles.

Use Value: 55µA quiescent current extends battery life beyond 2 years; auto-discharge ensures clean power-down between readings.

Use Scenario: Providing stable 2.6V bias for LCD segment drivers in handheld test equipment or industrial HMIs.

IC Role / Device Role / Timing Role: Low-noise auxiliary supply isolating sensitive display circuitry from noisy digital domains.

Use Value: 50µV_RMS noise prevents visible flicker or ghosting; ±1.5% accuracy maintains consistent contrast across temperature.

Wearable Fitness Tracker

Industrial Data Logger

Use Scenario: Regulating power to BLE SoC and MEMS motion sensors in wrist-worn devices with tight thermal and size constraints.

IC Role / Device Role / Timing Role: Compact, thermally efficient 2.6V LDO mounted adjacent to SoC die for minimal trace inductance.

Use Value: SOT89-5 R5 package delivers 47°C/W θ_JC, enabling reliable 600mA delivery without heatsink in sealed enclosures.

Use Scenario: Supplying 2.6V to precision ADCs and EEPROM in remote environmental monitoring nodes deployed outdoors.

IC Role / Device Role / Timing Role: Temperature-stable reference rail supporting accurate sensor digitization over –40°C to +85°C.

Use Value: ±100ppm/°C output drift and –40°C to +85°C guaranteed operation ensure <0.1% measurement error across full industrial range.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2112K-2.6TRG1	SOT25 package (smaller footprint, higher θ_JA = 184°C/W); same electrical specs.	Better suited for ultra-dense PCBs where height and area are constrained more than thermal performance.	Select when board space is premium and load current rarely exceeds 300mA continuously.
MCP1703T-2602E/MB	2.6V fixed, 250mA max output; lower I_Q (2.5µA), no auto-discharge; SOT23-5.	Targeted at ultra-low-power always-on rails, not high-current or fast-shutdown scenarios.	Choose only if output current demand is ≤250mA and discharge timing is managed externally.

Compared with AP2112K-2.6TRG1, the R5 variant offers superior thermal performance (θ_JC = 47°C/W vs. 96°C/W) for sustained 600mA loads; versus MCP1703T-2602E/MB, it delivers 2.4× higher current and integrated discharge-critical for system-level power sequencing integrity.

Availability

AP2112R5-2.6TRG1 is available at Aetrix Electronics and suitable for portable medical sensors, LCD bias supplies, wearable fitness trackers, and industrial data loggers requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2112R5-2.6TRG1 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 ICs, with leadership in power management, signal integrity, and protection solutions.

The AP2112 product line delivers high-performance, low-noise LDO regulators optimized for portable, battery-powered, and space-constrained applications demanding precision voltage regulation and robust fault protection.

FAQ

What is the minimum input voltage required for AP2112R5-2.6TRG1 to maintain regulation at 600mA?

The minimum input voltage is calculated as V_OUT + V_DROP = 2.6V + 0.25V = 2.85V. Per datasheet Section 4 (Recommended Operating Conditions), VIN must be ≥2.5V, but to guarantee 600mA output with margin, 2.85V is the practical minimum under worst-case dropout (250mV typ. @ 600mA). Operation below this risks foldback current limiting activation.

Can AP2112R5-2.6TRG1 be used with a 10µF aluminum electrolytic output capacitor instead of ceramic?

Yes-the datasheet explicitly states stability with 1.0µF flexible capacitors including aluminum electrolytic types. A 10µF aluminum cap exceeds the minimum requirement and improves low-frequency ripple rejection, though ESR should remain within 100mΩ to avoid phase margin degradation. No additional compensation is needed.

Does the EN pin require an external pull-up resistor for reliable startup?

No-AP2112R5-2.6TRG1 includes an internal 3.0MΩ EN pull-down resistor. When left floating, EN defaults to logic low (shutdown). To enable the device, drive EN actively high (≥1.5V) from a GPIO or dedicated control signal; no external pull-up is necessary or recommended, as it would increase standby current unnecessarily.

How does the auto-discharge function behave during fast enable/disable cycling?

When EN transitions low, the internal 60Ω discharge path activates immediately, discharging a 1µF output capacitor from 2.6V to <100mV in ~130µs (t ≈ 3 × R × C). During rapid toggling, this ensures VOUT fully collapses before re-enabling, preventing shoot-through or latch-up in downstream logic-provided EN pulse width exceeds 20µs (minimum start-up time).

AP2112R5-2.6TRG1 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):: 2.6V

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

AP2112R5-2.6TRG1 FAQ

1.How can I place an order for AP2112R5-2.6TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2112R5-2.6TRG1 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 AP2112R5-2.6TRG1 reliable?

The price and inventory of AP2112R5-2.6TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2112R5-2.6TRG1 is usually 5 days.

3.What payment methods are accepted for AP2112R5-2.6TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2112R5-2.6TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2112R5-2.6TRG1?

AP2112R5-2.6TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2112R5-2.6TRG1 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 AP2112R5-2.6TRG1?

For technical support, including AP2112R5-2.6TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2112R5-2.6TRG1 requirements.

6.How does Aetrix verify that AP2112R5-2.6TRG1 is sourced from the original manufacturer or authorized distributors?

All AP2112R5-2.6TRG1 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 AP2112R5-2.6TRG1 meets industry standards.

7.What is the process for return or replacement of AP2112R5-2.6TRG1?

All AP2112R5-2.6TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2112R5-2.6TRG1, 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 AP2112R5-2.6TRG1 part is unused and in its original packaging.

Return procedure for AP2112R5-2.6TRG1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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