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Asahi Kasei Microdevices/AKM AP1152ADU25
- Part No.:
- AP1152ADU25
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Package:
- SOT-89-5/6
- Datasheet:
-
AP1152ADU25.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
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Product details
Overview
AP1152ADU25 from Diodes Incorporated is a 2.5V fixed-output, 300mA low-dropout linear regulator with high-accuracy output (±1.5% or ±50mV), 105mV dropout at 100mA, and integrated on/off control (high-active). It operates from 2.1V to 14.5V input and supports stable regulation using only a 0.1µF ceramic output capacitor-ideal for noise-sensitive RF power supplies and precision analog circuits.
For engineers reviewing the AP1152ADU25 datasheet, AP1152ADU25 pinout, AP1152ADU25 application, or AP1152ADU25 equivalent, this page delivers verified specifications, SOT89-5 package details, thermal and protection behavior, noise pass terminal implementation guidance, and real-world selection alternatives for post-regulation and low-noise LDO use cases.
Technical Context
The AP1152ADU25 employs a bandgap reference and internal error amplifier to maintain tight DC output accuracy across -40°C to +85°C. Its control architecture integrates a built-in 500kΩ pull-down resistor on VCONT and uses an NP (noise bypass) terminal to enhance low-frequency ripple rejection via external capacitance.
Stability relies on three external capacitors: CIN (1.0µF recommended), CL (≥0.1µF ceramic or tantalum), and CNP (0.001–0.1µF). The SOT89-5 package features five terminals-VIN, VOUT, GND, VCONT, and NP-with exposed pad absent (unlike PLP1822-6), limiting thermal dissipation to 900mW on JEDEC 4-layer board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% or ±50mV - ensures stable bias for ADC references and PLL VCOs without trimming. |
| Max Output Current | 300mA continuous - sufficient for powering single-channel image sensors or audio codecs without thermal shutdown. |
| Dropout Voltage | 105mV at 100mA - enables operation with <2.6V input, critical for battery-powered 2.5V logic rails. |
| Ripple Rejection | 80dB at 1kHz - suppresses switching supply noise upstream of sensitive analog stages. |
| Quiescent Current | 65–90µA - minimizes standby power in always-on sensor nodes or infotainment subsystems. |
| Operating Range | 2.1V to 14.5V input, -40°C to +85°C ambient - supports automotive and industrial environments. |
| Protection | Over-current and thermal shutdown - prevents latch-up during short-circuit events or PCB overheating. |
Pinout & Package
SOT89-5 package: 5-pin surface-mount device with gull-wing leads, no exposed thermal pad. Pin 1 = NP (Noise Bypass), Pin 2 = GND, Pin 3 = VCONT (On/Off Control), Pin 4 = VIN, Pin 5 = VOUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NP | Noise Bypass Terminal | Connect 0.001–0.1µF capacitor to GND to improve low-frequency PSRR; larger values slow VOUT rise/fall time. |
| 2 - GND | Ground Reference | Main return path for load current and internal circuitry; must be low-impedance connection to system ground plane. |
| 3 - VCONT | On/Off Control Input | High-active logic: ≥1.8V = ON, ≤0.35V = OFF; internal 500kΩ pull-down eliminates need for external resistor. |
| 4 - VIN | Input Supply | Accepts 2.1–14.5V; requires 1.0µF ceramic input capacitor placed adjacent to pins 4 and 2 for stability. |
| 5 - VOUT | Regulated Output | Delivers 2.5V ±1.5% to load; stable with ≥0.1µF ceramic (2.5V output) or tantalum capacitor directly at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise operation | NP terminal enables sub-10µVRMS output noise when paired with ≥10nF CNP-critical for LNA and VCO biasing. |
| Minimal external components | Only three capacitors required (CIN, CL, CNP); no inductor or feedback resistors needed for fixed 2.5V output. |
| Fast transient response | Load step recovery within 250µs (CL=2.2µF) due to optimized internal compensation-maintains voltage during digital burst loads. |
| Thermal robustness | Thermal shutdown activates at ~150°C junction; derated power dissipation (900mW max) ensures reliability on standard FR4 PCBs. |
| Low-ESR capacitor compatibility | Stable with 0.1µF ceramic (2.5V VOUT) or higher-value tantalum-avoids oscillation in low-voltage, low-current regions. |
Applications
| RF Power Supplies | PLL/VCO Biasing |
|---|---|
|
Use Scenario: Powering RF front-end amplifiers and mixer ICs in 5G baseband modules. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering clean 2.5V bias to minimize phase noise and AM-to-PM distortion. Use Value: 80dB PSRR at 1kHz suppresses switching ripple from upstream DC/DC converters, preserving EVM performance. |
Use Scenario: Supplying voltage-controlled oscillator core and phase-locked loop charge pump circuits. IC Role / Device Role / Timing Role: Precision LDO providing ultra-stable 2.5V reference to reduce VCO frequency drift and jitter accumulation. Use Value: ±50mV output tolerance and <105mV dropout enable tight headroom margin while maintaining lock stability over temperature. |
| Low-Noise Image Sensors | Digital Still Camera Core Logic |
|
Use Scenario: Biasing CMOS image sensor analog signal chain (ADC reference, column amplifier, CDS block). IC Role / Device Role / Timing Role: Ultra-low-noise 2.5V supply isolating sensitive analog pixels from digital switching noise. Use Value: NP terminal capacitance tuning reduces 1/f noise floor below 10µVRMS, improving SNR in low-light capture. |
Use Scenario: Powering ISP (image signal processor) I/O banks and memory interface logic in compact DSC designs. IC Role / Device Role / Timing Role: Compact SOT89-5 LDO delivering regulated 2.5V to high-speed parallel buses with minimal PCB footprint. Use Value: 300mA capability supports burst-mode processing; on/off control synchronizes power with camera shutter timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2202K-2.5 | 200mA max output, SOT-23-5 package, no NP terminal, 250mV dropout at 100mA | Limited to lower-current analog blocks; lacks noise-bypass capability for RF/VCO use | Select when space-constrained layout prioritizes smallest footprint over noise performance |
| MCP1702T-2502E/MB | 250mA max, SOT-23-5, 170mV dropout at 100mA, ±2% output accuracy, no VCONT | Requires external enable logic; less precise output and higher dropout limit usable input range | Choose for cost-sensitive industrial sensors where ±2% tolerance and no on/off control are acceptable |
Compared with AP1152ADU25, AP2202K-2.5 trades noise performance and control flexibility for smaller size, while MCP1702T-2502E/MB sacrifices accuracy and integrated on/off for lower unit cost-neither offers the same combination of 300mA drive, 105mV dropout, NP-based noise suppression, and high-accuracy 2.5V output in SOT89-5.
Availability
AP1152ADU25 is available at Aetrix Electronics and suitable for RF power supplies, PLL/VCO biasing, low-noise image sensor units, and digital still camera designs requiring stable component supply with guaranteed long-term sourcing.
Supply support for AP1152ADU25 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 solutions for power management, signal integrity, and connectivity applications.
The AP1152 series was designed specifically for low-noise, high-PSRR post-regulation in RF, imaging, and precision analog systems-emphasizing stability with minimal external components and robust thermal protection.
FAQ
What is the maximum input voltage for AP1152ADU25?
The AP1152ADU25 supports an absolute maximum input voltage of 16V per Absolute Maximum Ratings, but its recommended operating range is 2.1V to 14.5V. Exceeding 14.5V risks violating safe operating area limits, especially under high ambient temperatures or heavy load conditions. Always ensure VIN remains within spec to guarantee long-term reliability and avoid triggering thermal shutdown prematurely.
Does AP1152ADU25 require an external pull-up resistor on VCONT?
No, AP1152ADU25 does not require an external pull-up resistor on VCONT because it integrates a 500kΩ internal pull-down resistor. The VCONT pin is high-active: applying ≥1.8V turns the regulator ON, while ≤0.35V places it in standby mode drawing only 0.1µA. This simplifies interface design with standard CMOS logic outputs without additional biasing components.
Can AP1152ADU25 operate stably with a 0.1µF ceramic output capacitor?
Yes, AP1152ADU25 is explicitly characterized for stable operation with a 0.1µF ceramic capacitor on VOUT when the output voltage is 2.5V. This is confirmed in Section 1. General Description and Section 11.4, which specify "output capacitor is available to use a small 0.1uF ceramic capacitor (2.5V VOUT)." Stability is maintained across -40°C to +85°C provided ESR remains low and layout follows recommended practices.
What is the purpose of the NP pin on AP1152ADU25?
The NP (Noise Pass) pin on AP1152ADU25 is a dedicated noise-bypass terminal that improves low-frequency power supply rejection ratio (PSRR) when decoupled to GND with a capacitor (typically 0.001–0.1µF). Increasing CNP enhances ripple attenuation below 10kHz but slows VOUT turn-on/turn-off transients. It has no effect on DC regulation or thermal behavior-its sole function is AC noise suppression.
How does thermal shutdown behave on AP1152ADU25 during overload?
AP1152ADU25 activates thermal shutdown when junction temperature reaches approximately 150°C, turning off VOUT until die temperature falls sufficiently to re-enable regulation. During sustained overload (e.g., VOUT shorted), the device cycles between ON and OFF states-observable as output voltage oscillation. This protects against permanent damage but requires proper heatsinking or derating (e.g., ≤900mW on 4-layer JEDEC board) to avoid repeated cycling in continuous operation.
AP1152ADU25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- -
- Package/Case:
- SOT-89-5/6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 14.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.44V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 3.6 mA
- PSRR:
- 80dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AP1152ADU25 FAQ
1.How can I place an order for AP1152ADU25 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1152ADU25 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 AP1152ADU25 reliable?
The price and inventory of AP1152ADU25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1152ADU25 is usually 5 days.
3.What payment methods are accepted for AP1152ADU25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1152ADU25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1152ADU25?
AP1152ADU25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1152ADU25 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 AP1152ADU25?
For technical support, including AP1152ADU25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1152ADU25 requirements.
6.How does Aetrix verify that AP1152ADU25 is sourced from the original manufacturer or authorized distributors?
All AP1152ADU25 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 AP1152ADU25 meets industry standards.
7.What is the process for return or replacement of AP1152ADU25?
All AP1152ADU25 units undergo pre-shipment inspection (PSI). If there is an issue with AP1152ADU25, 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 AP1152ADU25 part is unused and in its original packaging.
Return procedure for AP1152ADU25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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