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Diodes Incorporated AP2112M-1.8TRG1
- Part No.:
- AP2112M-1.8TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2112M-1.8TRG1.pdf
- Description:
- IC REG LINEAR 1.8V 600MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
AP2112M-1.8TRG1 from Diodes Incorporated is a fixed-output 1.8V, 600mA CMOS low-dropout linear regulator in SO-8 package with enable control, ±1.5% output accuracy, 250mV typical dropout at full load, and auto-discharge (60Ω) when disabled. It delivers stable power to core logic rails in space-constrained industrial and portable systems requiring fast transient response and low noise.
For engineers reviewing the AP2112M-1.8TRG1 datasheet, AP2112M-1.8TRG1 pinout, AP2112M-1.8TRG1 application, or AP2112M-1.8TRG1 equivalent, key selection criteria include dropout voltage at 600mA, EN logic thresholds (0–0.4V low, 1.5–6.0V high), thermal shutdown at +160°C, and compatibility with 1.0µF ceramic, tantalum, or aluminum electrolytic output capacitors.
Technical Context
The AP2112M-1.8TRG1 integrates a precision bandgap reference, error amplifier, and PMOS pass transistor in a CMOS process, enabling low quiescent current (55µA typ.) and ultra-low standby current (0.01µA typ.). Its foldback short-circuit protection limits output current to 50mA during fault conditions.
It features an internal 3.0MΩ EN pull-down resistor and a dedicated VOUT discharge path (60Ω) activated upon disable, ensuring rapid output decay. PSRR remains at –65dB from 100Hz to 1kHz, and output noise is 50µVRMS (10Hz–100kHz) with no load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.5% - ensures stable core supply for 1.8V I/O or processor domains without external feedback. |
| Max Output Current | 600mA minimum - supports moderate-power digital loads such as FPGAs, microcontrollers, and interface ICs. |
| Dropout Voltage | 250mV typical @600mA - enables operation with VIN as low as 2.05V while maintaining regulation. |
| Quiescent Current | 55µA typical - minimizes idle power loss in battery-backed or always-on subsystems. |
| PSRR | –65dB @100Hz/1kHz - suppresses ripple from noisy upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | +160°C with +25°C hysteresis - provides robust overtemperature protection during sustained overload or poor PCB heatsinking. |
| EN Logic Thresholds | VIL ≤ 0.4V (disable), VIH ≥ 1.5V (enable) - compatible with 1.8V, 3.3V, and 5V GPIO control signals. |
| Output Discharge | 60Ω internal path to GND when EN = low - eliminates hold-up time on VOUT, critical for safe power sequencing. |
Pinout & Package
AP2112M-1.8TRG1 is housed in an SO-8 (small outline integrated circuit, 8-pin) package with exposed thermal pad (θJA = 114°C/W). Pin 1 is VOUT; pins 6 and 7 are tied to GND; pin 8 is VIN; pin 5 is EN; pins 2 and 3 are NC; pin 4 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8V output - connects directly to load; requires 1.0µF ceramic capacitor to GND for stability. |
| 2, 3 | NC | No connection - must remain unconnected; not internally bonded or functional. |
| 4, 6, 7 | GND | Power ground return - all three pins are internally connected to common die GND; tie together on PCB for lowest impedance. |
| 5 | EN | Active-high enable - drives regulator ON when ≥1.5V; pulls down to 0.01µA standby when <0.4V. |
| 8 | VIN | Input supply (2.5–6.0V) - must be filtered with 1.0µF ceramic capacitor close to pin for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 60Ω internal discharge path to GND when disabled - ensures VOUT decays rapidly for safe power-down sequencing. |
| Stable with 1.0µF output cap | Compatible with ceramic, tantalum, and aluminum electrolytic - reduces BOM count and simplifies layout vs. legacy LDOs requiring ≥10µF. |
| Foldback short-circuit protection | 50mA current limit during output short - prevents thermal runaway and enables self-recovery after fault removal. |
| Low-noise regulation | 50µVRMS output noise (10Hz–100kHz) - avoids interference in sensitive analog or RF subsystems powered from same rail. |
| Wide input range | 2.5V to 6.0V operation - supports single-cell Li-ion (3.0–4.2V), USB 5V, or dual-cell alkaline inputs without pre-regulation. |
| Robust ESD rating | HBM 4000V / MM 400V - withstands handling and board-level ESD events without latch-up or parameter shift. |
Applications
| Portable SSD Power Management | LCD Panel Bias Supply |
|---|---|
|
Use Scenario: Powers NAND flash controller and DRAM cache in M.2 SATA SSDs where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Primary 1.8V core regulator delivering 600mA with fast load transient response to handle burst read/write currents. Use Value: 250mV dropout allows direct regulation from 3.3V rail, eliminating need for intermediate buck stage and reducing system BOM cost. |
Use Scenario: Supplies gate driver ICs and timing controllers in 10–24 inch LCD monitors with tight EMI requirements. IC Role / Device Role / Timing Role: Low-noise 1.8V source for display timing ICs, minimizing jitter on LVDS or eDP clock paths. Use Value: 50µVRMS output noise and –65dB PSRR prevent visible flicker or color banding caused by switching noise coupling. |
| Industrial PLC I/O Module | USB-C Peripheral Hub Logic Rail |
|
Use Scenario: Provides isolated 1.8V logic supply for FPGA-configured digital I/O channels in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling hot-swap-safe power gating of field-side logic sections. Use Value: EN-compatible 0.4V logic low threshold ensures reliable disable even under marginal 3.3V GPIO drive conditions. |
Use Scenario: Regulates 1.8V for USB-C PD controller, Type-C port logic, and sideband use (SBU) signal conditioning ICs. IC Role / Device Role / Timing Role: Secondary LDO fed from 5V USB-C VBUS, supporting dynamic enable/disable during port role swaps. Use Value: 60Ω auto-discharge clears VOUT within microseconds during role reversal, preventing backfeed into upstream sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-1802E/MB | 300mA max output, 600mV dropout @300mA, no auto-discharge, SOT-23-5 package | Limited to lower-current logic rails; lacks sequencing support for multi-rail systems | Select only if load current ≤300mA and discharge control is unnecessary. |
| Torex XC6219B182MR-G | 400mA max output, 220mV dropout @400mA, 1.0µF stable, no EN pin, SOT-25 package | Suitable for fixed-enable applications only; smaller footprint but lower current capability | Prefer when board space is critical and enable control is handled externally. |
Compared with MCP1703T-1802E/MB and XC6219B182MR-G, AP2112M-1.8TRG1 uniquely combines 600mA delivery, SO-8 thermal performance (θJA = 114°C/W), EN-driven discharge, and ±1.5% accuracy - making it optimal for thermally demanding, sequenced 1.8V systems where reliability and feature completeness outweigh footprint constraints.
Availability
AP2112M-1.8TRG1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable SSDs, LCD panel bias supplies, and USB-C peripheral hubs requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for AP2112M-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 series was designed as a high-performance, pin-compatible LDO family targeting space-constrained applications needing low noise, fast transient response, and robust enable-controlled sequencing - particularly in portable and industrial equipment.
FAQ
What is the minimum input voltage required for AP2112M-1.8TRG1 to maintain regulation at 600mA?
The minimum input voltage is calculated as VOUT + VDROP = 1.8V + 0.25V = 2.05V. However, the recommended operating minimum is 2.5V per datasheet specifications to ensure guaranteed 600mA output across temperature and process variation. Below 2.5V, output current capability degrades progressively.
Can AP2112M-1.8TRG1 be used with a 10µF aluminum electrolytic output capacitor?
Yes - the device is explicitly characterized and guaranteed stable with 1.0µF to 10µF capacitors of ceramic, tantalum, or aluminum electrolytic types. A 10µF aluminum electrolytic improves low-frequency ripple rejection but does not enhance high-frequency transient response beyond what 1.0µF ceramic provides.
Does the EN pin require an external pull-up resistor?
No - the EN pin includes an internal 3.0MΩ pull-down resistor. An external pull-up is optional and only needed if system-level logic requires forced enable during power-up before MCU initialization. Driving EN directly from a GPIO suffices for standard control.
How does the 60Ω discharge resistor affect system power sequencing?
When EN is pulled low, the 60Ω path discharges a 1.0µF output capacitor from 1.8V to 0.1V in approximately 360µs (t ≈ 3 × R × C). This enables deterministic, sub-millisecond VOUT decay - critical for meeting JEDEC JESD78 latch-up immunity and avoiding backfeed in multi-rail systems during controlled shutdown.
AP2112M-1.8TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 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:
- 8-SOIC
AP2112M-1.8TRG1 FAQ
1.How can I place an order for AP2112M-1.8TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2112M-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 AP2112M-1.8TRG1 reliable?
The price and inventory of AP2112M-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 AP2112M-1.8TRG1 is usually 5 days.
3.What payment methods are accepted for AP2112M-1.8TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2112M-1.8TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2112M-1.8TRG1?
AP2112M-1.8TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2112M-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 AP2112M-1.8TRG1?
For technical support, including AP2112M-1.8TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2112M-1.8TRG1 requirements.
6.How does Aetrix verify that AP2112M-1.8TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2112M-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 AP2112M-1.8TRG1 meets industry standards.
7.What is the process for return or replacement of AP2112M-1.8TRG1?
All AP2112M-1.8TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2112M-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 AP2112M-1.8TRG1 part is unused and in its original packaging.
Return procedure for AP2112M-1.8TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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