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Diodes Incorporated AP2112R5-1.2TRG1
- Part No.:
- AP2112R5-1.2TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-89-5/6
- Datasheet:
-
AP2112R5-1.2TRG1.pdf
- Description:
- IC REG LINEAR 1.2V 600MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
AP2112R5-1.2TRG1 from Diodes Incorporated is a fixed 1.2V, 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 AP2112R5-1.2TRG1 datasheet, AP2112R5-1.2TRG1 pinout, AP2112R5-1.2TRG1 application, or AP2112R5-1.2TRG1 equivalent, key selection criteria include dropout voltage at 600mA (250mV typ. for 3.3V version; 1000–1300mV for 1.2V), thermal resistance (47°C/W junction-to-case), EN logic thresholds (VIH ≥1.5V, VIL ≤0.4V), and stability with 1.0µF ceramic output capacitors.
Technical Context
The AP2112R5-1.2TRG1 integrates a precision bandgap reference, error amplifier, and PMOS pass transistor in a CMOS process, enabling low dropout and high PSRR (−65dB at 100Hz/1kHz). Its internal foldback current limit (50mA short-circuit) and thermal shutdown (+160°C) provide robust fault protection without external components.
Operation requires only input and output capacitors (1.0µF ceramic recommended); the EN pin controls full rail shutdown with 0.01µA standby current, while the auto-discharge path (60Ω) ensures rapid VOUT decay during disable-critical for sequencing-sensitive systems like multi-rail SoC platforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1.5% - meets core voltage tolerance for ARM Cortex-M microcontrollers and FPGA I/O banks. |
| Max Output Current | 600mA minimum - supports mid-power digital loads such as display controllers or USB PHYs. |
| Dropout Voltage | 1000–1300mV @600mA - defines minimum VIN = VOUT + dropout = 2.2–2.5V for reliable regulation. |
| Quiescent Current | 55µA typical - enables >1-year battery life in always-on sensor nodes with periodic wake-up. |
| PSRR | −65dB @100Hz/1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO. |
| Thermal Resistance θJC | 47°C/W - allows 1.2W power dissipation before junction exceeds +125°C with minimal heatsinking. |
| Enable Thresholds | VIH ≥1.5V, VIL ≤0.4V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| VOUT Discharge Resistor | 60Ω - discharges 10µF load in <600µs, satisfying reset timing requirements for downstream ICs. |
Pinout & Package
SOT89-5 (R5) package: 5-pin thermally enhanced plastic surface-mount package with exposed pad for improved heat dissipation. Pin 1 = VOUT, Pin 2 = VIN, Pin 3 = NC, Pin 4 = GND, Pin 5 = EN (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output | Delivers stable 1.2V to load; requires local 1.0µF ceramic capacitor for stability. |
| 2 (VIN) | Input supply | Accepts 2.5–6.0V; must be filtered to meet PSRR performance and avoid dropout violation. |
| 3 (NC) | No connection | Internally unconnected; PCB pad may be left floating or tied to GND for mechanical reinforcement. |
| 4 (GND) | Power ground | Primary return path; must be low-impedance and thermally coupled to exposed pad for thermal management. |
| 5 (EN) | Enable control | Active-high logic input; drives internal pass transistor and discharge switch; 3.0MΩ internal pull-down. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on disable | 60Ω internal resistor pulls VOUT to GND, ensuring controlled power-down sequencing in multi-rail systems. |
| Stable with 1.0µF output cap | Supports ceramic, tantalum, or aluminum electrolytic capacitors-reduces BOM count and board area vs. legacy LDOs. |
| Foldback short-circuit protection | Limits output current to 50mA during fault, preventing thermal runaway and enabling safe recovery after overload. |
| Low noise & high PSRR | 50µVRMS output noise and −65dB PSRR minimize ripple coupling into noise-sensitive analog or RF subsystems. |
| Wide operating temperature | −40°C to +85°C ambient range ensures reliability in industrial and automotive cabin applications. |
| Green RoHS compliance | Lead-free, halogen-free, and antimony-free construction meets global environmental regulations and end-of-life requirements. |
Applications
| Portable DVD Player Power | LCD Monitor Logic Rail |
|---|---|
Use Scenario: Supplies 1.2V core voltage to MPEG decoder ASIC and video processor under battery-powered operation with variable load transients. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean power to digital signal processing blocks. Use Value: Fast loop response maintains output regulation during burst-mode video decoding, preventing frame drop or corruption. |
Use Scenario: Powers 1.2V I/O interface between timing controller and LVDS transmitter in 1080p LCD panels. IC Role / Device Role / Timing Role: Precision voltage source ensuring consistent logic threshold margins for high-speed data transmission. Use Value: ±1.5% output accuracy and 0.2%/A load regulation guarantee stable eye diagram integrity across temperature and load variation. |
| Laptop CPU Core Supply | Industrial PLC Digital I/O Module |
Use Scenario: Provides 1.2V auxiliary rail for embedded microcontroller managing keyboard, touchpad, and system management functions. IC Role / Device Role / Timing Role: Standby-optimized LDO enabling instant wake-from-sleep with sub-µA quiescent current. Use Value: 0.01µA standby current extends battery runtime during suspend mode without compromising startup latency. |
Use Scenario: Generates isolated 1.2V logic supply for FPGA-based I/O expansion modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Fault-tolerant regulator with thermal shutdown and short-circuit protection for unattended operation. Use Value: +160°C thermal shutdown and 47°C/W θJC allow continuous operation at +70°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 300mA max output, 1.2V fixed, 6µA IQ, SOT23-3 package - lower current, smaller footprint, no EN or discharge. | Not suitable for 600mA loads; lacks enable and auto-discharge - requires external circuitry for sequencing. | Select only for ultra-low-power, space-constrained designs where 300mA suffices and sequencing is handled externally. |
| TPS7A0512PDBVR | 200mA max output, 1.2V fixed, 25µA IQ, SOT23-5 package - includes EN but no discharge resistor; higher PSRR (−70dB). | Insufficient current for AP2112R5-1.2TRG1's 600mA requirement; no integrated discharge path complicates power-down timing. | Choose only if system load is ≤200mA and superior PSRR outweighs need for discharge and current capability. |
Compared with MCP1700T-1202E/TT and TPS7A0512PDBVR, AP2112R5-1.2TRG1 uniquely combines 600mA delivery, integrated 60Ω discharge, and SOT89-5 thermal performance-making it the sole option among these three for thermally demanding, sequenced 1.2V rails exceeding 300mA.
Availability
AP2112R5-1.2TRG1 is available at Aetrix Electronics and suitable for portable DVD players, LCD monitor logic rails, laptop auxiliary supplies, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP2112R5-1.2TRG1 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-current, low-noise LDO regulators optimized for portable and space-constrained applications where precision voltage regulation, fast transient response, and thermal efficiency are critical.
FAQ
What is the minimum input voltage required for AP2112R5-1.2TRG1 to regulate 1.2V at 600mA?
The dropout voltage is specified as 1000–1300mV at 600mA. Therefore, minimum VIN = 1.2V + 1.3V = 2.5V ensures guaranteed regulation across temperature and process variation. Operation below 2.5V risks dropout and output collapse under full load.
Can AP2112R5-1.2TRG1 be used with a 2.2µF ceramic output capacitor instead of 1.0µF?
Yes. The device is stable with 1.0µF or larger ceramic, tantalum, or aluminum electrolytic capacitors. A 2.2µF ceramic improves load transient response and reduces output ripple, provided ESR remains within the stable range (typically <100mΩ).
Does the EN pin require an external pull-up resistor?
No. The EN pin has an internal 3.0MΩ pull-down resistor. An external pull-up is optional and only needed if system-level logic cannot drive EN high reliably; direct GPIO connection is sufficient for most applications.
How does the auto-discharge function behave during power loss?
When EN is driven low or floats below 0.4V, the internal 60Ω resistor connects VOUT to GND, discharging output capacitance. For a 10µF capacitor, VOUT falls from 1.2V to 100mV in ~600µs-enabling deterministic reset timing for downstream logic without external FETs.
AP2112R5-1.2TRG1 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 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
AP2112R5-1.2TRG1 FAQ
1.How can I place an order for AP2112R5-1.2TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2112R5-1.2TRG1 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 AP2112R5-1.2TRG1 reliable?
The price and inventory of AP2112R5-1.2TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2112R5-1.2TRG1 is usually 5 days.
3.What payment methods are accepted for AP2112R5-1.2TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2112R5-1.2TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2112R5-1.2TRG1?
AP2112R5-1.2TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2112R5-1.2TRG1 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 AP2112R5-1.2TRG1?
For technical support, including AP2112R5-1.2TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2112R5-1.2TRG1 requirements.
6.How does Aetrix verify that AP2112R5-1.2TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2112R5-1.2TRG1 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 AP2112R5-1.2TRG1 meets industry standards.
7.What is the process for return or replacement of AP2112R5-1.2TRG1?
All AP2112R5-1.2TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2112R5-1.2TRG1, 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 AP2112R5-1.2TRG1 part is unused and in its original packaging.
Return procedure for AP2112R5-1.2TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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