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Diodes Incorporated AP2111H-1.8TRG1
- Part No.:
- AP2111H-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP2111H-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 600MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
AP2111H-1.8TRG1 from BCD Semiconductor is a fixed-output 1.8 V, 600 mA CMOS low-dropout linear regulator with enable control and auto-discharge functionality, designed for power rail regulation in space-constrained portable electronics. It delivers ±1.5% output accuracy, 250 mV typical dropout at 600 mA (VIN ≥ 2.8 V), and 50 μVRMS output noise, operating across –40°C to +85°C ambient temperature.
For engineers reviewing the AP2111H-1.8TRG1 datasheet, AP2111H-1.8TRG1 pinout, AP2111H-1.8TRG1 application, or AP2111H-1.8TRG1 equivalent, key selection criteria include guaranteed 600 mA load capability, SOT-223 thermal performance (θJA = 128°C/W), fast load transient response, and compatibility with 1.0 μF ceramic, tantalum, or aluminum electrolytic output capacitors.
Technical Context
The AP2111H-1.8TRG1 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and PMOS pass transistor. Its enable input (EN) controls regulator state with logic-high activation (VIH ≥ 1.5 V) and logic-low shutdown (VIL ≤ 0.4 V), triggering built-in 60 Ω VOUT discharge path.
It integrates foldback short-circuit protection (50 mA limit), thermal shutdown (160°C trip with 30°C hysteresis), and UVLO. The device achieves 65 dB PSRR at both 100 Hz and 1 kHz while maintaining 0.2%/A load regulation and 0.02%/V line regulation under full operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.5% - ensures stable core voltage for 1.8 V logic rails without external feedback components. |
| Max Output Current | 600 mA minimum - supports sustained high-current loads such as microcontroller cores or interface ICs. |
| Dropout Voltage | 250 mV typical @ 600 mA (VIN ≥ 2.8 V) - enables operation from 2.8 V input to deliver regulated 1.8 V with minimal headroom loss. |
| Quiescent Current | 55 μA typical - minimizes standby power draw in battery-powered systems during active regulation. |
| Standby Current | 0.01 μA typical - reduces system leakage to sub-nA levels when EN = low, critical for long-term battery retention. |
| PSRR | 65 dB @ 100 Hz and 1 kHz - suppresses ripple from noisy DC-DC pre-regulators feeding the LDO input. |
| RMS Output Noise | 50 μVRMS (10 Hz–100 kHz) - preserves signal integrity in analog/RF subsystems powered by this rail. |
| Operating Temp | –40°C to +85°C - qualified for industrial and consumer portable equipment environments. |
Pinout & Package
SOT-223 package (H variant): thermally enhanced 4-pin surface-mount package with exposed thermal pad; pin 1 = VIN, pin 2 = VOUT, pin 3 = GND, pin 4 = EN (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.8 V to 6.0 V input; must be applied before enabling load to prevent premature foldback activation. |
| VOUT (Pin 2) | Regulated output node | Delivers 1.8 V ±1.5%; requires ≥1.0 μF output capacitor (ceramic/tantalum/aluminum) for stability. |
| GND (Pin 3) | Power and signal reference | Common return for input, output, and enable logic; connects to thermal pad for optimal heat dissipation. |
| EN (Pin 4) | Enable control input | Active-high logic (VIH ≥ 1.5 V); pulls VOUT to ground via 60 Ω internal resistor when low, enabling rapid rail discharge. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on disable | 60 Ω internal discharge path rapidly collapses VOUT when EN = low, preventing floating rail issues in multi-rail sequencing. |
| Foldback short-circuit protection | 50 mA current limit prevents thermal runaway during output shorts while limiting power dissipation. |
| Low-noise regulation | 50 μVRMS broadband noise enables clean power delivery to ADCs, PLLs, and RF front-ends without added filtering. |
| Flexible capacitor compatibility | Stable with 1.0 μF ceramic, tantalum, or aluminum electrolytic output caps - simplifies BOM and layout across product variants. |
| High PSRR at audio frequencies | 65 dB rejection at 100 Hz and 1 kHz suppresses switching noise from upstream DC-DC converters powering the LDO input. |
Applications
| Laptop Core Power | Portable DVD Player SoC Supply |
|---|---|
|
Use Scenario: Regulating 1.8 V core voltage for embedded microcontrollers and memory interfaces in compact laptop subsystems. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable 1.8 V from a higher-voltage DC-DC rail. Use Value: 250 mV dropout allows efficient use of 2.8 V intermediate bus; ±1.5% accuracy ensures reliable digital logic timing margins. |
Use Scenario: Powering video decoder ASICs and display interface circuitry in battery-operated portable DVD players. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean 1.8 V supply with fast transient response to handle burst-mode video processing loads. Use Value: 50 μVRMS noise and 65 dB PSRR preserve signal-to-noise ratio in analog video paths; 0.01 μA standby current extends battery life. |
| LCD Monitor Logic Rail | Industrial Handheld Terminal |
|
Use Scenario: Supplying 1.8 V I/O and control logic for LCD timing controllers and interface bridges in desktop monitors. IC Role / Device Role / Timing Role: Secondary LDO generating isolated 1.8 V domain with independent enable control for power sequencing. Use Value: EN pin enables synchronized rail shutdown during display sleep mode; –40°C to +85°C rating supports wide ambient operation. |
Use Scenario: Powering ARM Cortex-M based MCU cores and sensor interface circuits in ruggedized handheld terminals. IC Role / Device Role / Timing Role: High-reliability LDO with thermal shutdown and foldback protection for unattended field-deployed devices. Use Value: 160°C thermal shutdown with 30°C hysteresis prevents latch-up under sustained overload; SOT-223 package offers robust thermal performance (θJA = 128°C/W). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 300 mA max output, 170 mV dropout @ 250 mA, no auto-discharge, SOT-23-3 package | Limited to lower-current peripherals; lacks EN-controlled discharge and thermal hysteresis | Select when cost and footprint are prioritized over 600 mA capability and rail collapse control. |
| Torex XC6206P182MR-G | 300 mA max output, 200 mV dropout @ 100 mA, no enable pin, SOT-23-5 package | Fixed-on operation only; no sequencing or standby control; lower PSRR (60 dB @ 1 kHz) | Choose for always-on, ultra-low-quiescent (1.0 μA) applications where enable and discharge are unnecessary. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the AP2111H-1.8TRG1 uniquely combines 600 mA drive, integrated EN-controlled discharge, and 65 dB PSRR in a thermally optimized SOT-223 package-making it suitable for higher-power, sequenced, and noise-sensitive 1.8 V rail designs.
Availability
AP2111H-1.8TRG1 is available at Aetrix Electronics and suitable for laptop computer power subsystems, portable DVD player SoC supplies, and LCD monitor logic rails requiring stable component supply, RoHS-compliant green packaging, and tape-and-reel delivery for automated assembly.
Supply support for AP2111H-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
BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and computing markets.
The AP2111 series belongs to BCD's high-performance LDO portfolio, engineered specifically for portable electronics demanding low dropout, low noise, fast transient response, and robust protection features in compact packages.
FAQ
What is the minimum input voltage required for AP2111H-1.8TRG1 to maintain regulation at 600 mA?
The datasheet specifies a typical dropout voltage of 250 mV at 600 mA for the 1.8 V version. Therefore, the minimum input voltage is 1.8 V + 0.25 V = 2.05 V; however, the recommended minimum VIN is 2.8 V per the electrical characteristics table to ensure guaranteed 600 mA output across temperature and process variation.
Does AP2111H-1.8TRG1 require an external pull-up resistor on the EN pin?
No. The EN pin has an internal 3.0 MΩ pull-down resistor, so it defaults to OFF (shutdown) when left floating. A logic-high voltage ≥1.5 V must be actively driven to enable regulation; no external pull-up is needed unless open-drain control is used.
Can AP2111H-1.8TRG1 operate with a 10 μF aluminum electrolytic output capacitor?
Yes. The datasheet explicitly states stability with 1.0 μF flexible capacitors including aluminum electrolytic types. A 10 μF unit exceeds the minimum requirement and improves low-frequency ripple suppression, provided ESR remains within the 10–300 mΩ range specified for stability.
Is the SOT-223 package of AP2111H-1.8TRG1 lead (Pb)-free and RoHS compliant?
Yes. The "G1" suffix in AP2111H-1.8TRG1 denotes BCD Semiconductor's Pb-free, RoHS-compliant, and green-qualified product line, verified per JEDEC J-STD-609A standards and compatible with standard reflow profiles.
AP2111H-1.8TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 1.3V @ 600mA
- Current - Output:
- 600mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (100Hz ~ 1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AP2111H-1.8TRG1 FAQ
1.How can I place an order for AP2111H-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2111H-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 AP2111H-1.8TRG1 reliable?
The price and inventory of AP2111H-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 AP2111H-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2111H-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2111H-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2111H-1.8TRG1?
AP2111H-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2111H-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 AP2111H-1.8TRG1?
For technical support, including AP2111H-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2111H-1.8TRG1 requirements.
6.How does Aetrix verify that AP2111H-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2111H-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 AP2111H-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2111H-1.8TRG1?
All AP2111H-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2111H-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 AP2111H-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2111H-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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