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Asahi Kasei Microdevices/AKM AP1152ADU33
- Part No.:
- AP1152ADU33
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Package:
- SOT-89-5/6
- Datasheet:
-
AP1152ADU33.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,012
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Product details
Overview
AP1152ADU33 from Diodes Incorporated is a 3.3 V, 300 mA low-dropout linear regulator with high-PSRR (80 dB at 1 kHz), ±1.5% output voltage accuracy, and on/off control (high-active). It operates from 2.1 V to 14.5 V input, features 105 mV dropout at 100 mA, and supports stable regulation with only a 0.1 µF ceramic output capacitor - used in RF power supplies and precision analog front-ends.
For engineers reviewing the AP1152ADU33 datasheet, AP1152ADU33 pinout, AP1152ADU33 application, or AP1152ADU33 equivalent, this page delivers verified electrical specs, SOT89-5 package details, noise-bypass terminal implementation guidance, thermal derating data, and real-world substitution options for low-noise LDO selection in imaging, audio, and post-regulation designs.
Technical Context
The AP1152ADU33 integrates a bandgap reference, error amplifier, and NMOS pass transistor in a current-limited, thermally protected architecture. Its NP (noise bypass) terminal enables tunable ripple rejection via external capacitor, while the built-in 500 kΩ pull-down resistor on VCONT simplifies high-active enable logic interfacing.
Stability is achieved with minimal external components: 1.0 µF input capacitance and ≥0.1 µF ceramic output capacitance (for VOUT ≥ 2.5 V). The device maintains regulation across –40°C to +85°C ambient, with dropout voltage increasing predictably under load and temperature per guaranteed max values in Table 2 and Table 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±1.5% (±49.5 mV) - trimmed at factory; meets tight tolerance requirements for ADC reference rails and PLL VCO biasing. |
| Max Output Current | 300 mA continuous - sufficient for powering image sensor interfaces or dual-channel audio codecs without thermal shutdown. |
| Dropout Voltage | 105 mV at 100 mA - enables operation with <3.405 V input for 3.3 V output, critical in battery-powered systems near end-of-discharge. |
| Ripple Rejection | 80 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters, preserving signal integrity in sensitive analog circuits. |
| Quiescent Current | 65–90 µA - ensures ultra-low standby power in always-on sensor nodes or IoT edge devices. |
| Operating Input Range | 2.1 V to 14.5 V - accommodates wide-input industrial rails and automotive battery variations (cold-crank tolerant). |
| Thermal Resistance θJA | 138°C/W (SOT89-5, 4-layer JEDEC board) - requires PCB copper area or thermal vias for >150 mW sustained dissipation. |
Pinout & Package
SOT89-5 package: 5-pin surface-mount outline with exposed thermal pad (not electrically connected in this variant); footprint compatible with standard SOT-89 reflow profiles and manual soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NP | Noise Bypass Terminal | Connects to GND via 0.001–0.1 µF capacitor to improve low-frequency PSRR; larger CNP slows VOUT rise/fall time. |
| 2 - GND | Ground Reference | Main return path for VIN, VOUT, and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 - VCONT | On/Off Control Input | High-active enable: ≥1.8 V = ON, ≤0.35 V = OFF; internal 500 kΩ pull-down eliminates need for external resistor. |
| 4 - VIN | Input Supply | Accepts 2.1–14.5 V; requires 1.0 µF ceramic capacitor placed adjacent to pin for transient stability. |
| 5 - VOUT | Regulated Output | Delivers 3.3 V ±1.5%; stable with ≥0.1 µF ceramic CL (2.5 V rating minimum); layout-sensitive for EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Noise Operation | NP terminal allows >20 dB improvement in 10 Hz–100 kHz noise floor vs. standard LDOs - essential for CMOS image sensor bias rails. |
| Minimal External Components | Stable with only CIN = 1.0 µF and CL = 0.1 µF ceramic - reduces BOM count and PCB area vs. legacy LDOs requiring tantalum or larger ceramics. |
| Robust Protection Suite | Integrated over-current limit (500 mA short-circuit current) and thermal shutdown (150°C junction) - prevents field failure during load faults or poor heatsinking. |
| Wide Input Voltage Range | 2.1–14.5 V operation supports single-supply designs across 3.3 V logic, 5 V peripherals, and 12 V industrial inputs without intermediate regulators. |
| High-Accuracy Output | ±1.5% initial tolerance (±50 mV at 3.3 V) - eliminates need for external trimming in medical instrumentation and precision data acquisition. |
Applications
| RF Power Supplies | PLL/VCO Biasing |
|---|---|
|
Use Scenario: Powering RF front-end amplifiers and mixer ICs in 5G base station transceivers where supply noise directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 3.3 V to GaAs MMIC bias networks and LO distribution paths. Use Value: 80 dB PSRR at 1 kHz attenuates switching artifacts from primary DC/DC, reducing phase noise by up to 8 dBc/Hz at 100 kHz offset. |
Use Scenario: Providing ultra-stable voltage to VCO tuning diodes and fractional-N PLL charge pumps in satellite modem timing subsystems. IC Role / Device Role / Timing Role: Precision LDO delivering 3.3 V with ±49.5 mV tolerance to minimize VCO gain variation and jitter accumulation. Use Value: ±1.5% output accuracy ensures <±0.5% KVCO drift across temperature, maintaining loop stability and lock time consistency. |
| Low-Noise Image Sensor Unit | High-Speed ADC/DAC Reference Rail |
|
Use Scenario: Biasing CMOS image sensor analog front-end (AFE) blocks including column amplifiers and correlated double samplers. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for sensor analog supply, decoupled via NP capacitor to suppress digital switching noise. Use Value: NP terminal optimization achieves <15 µVRMS integrated noise (10 Hz–1 MHz), preventing fixed-pattern noise in 12-bit+ imaging pipelines. |
Use Scenario: Generating clean reference voltage for 16-bit SAR ADCs and high-fidelity audio DACs in portable ultrasound and studio-grade audio gear. IC Role / Device Role / Timing Role: Regulated 3.3 V source for ADC/DAC analog supplies and reference buffers, isolated from digital domain noise. Use Value: 105 mV dropout enables use with Li-ion batteries down to 3.4 V, sustaining full resolution without headroom loss during discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361-33SG-7 | 300 mA, 3.3 V, ±2% accuracy, 250 mV dropout at 300 mA, no NP terminal | Lacks noise-bypass capability; lower PSRR (65 dB @ 1 kHz); suitable for cost-sensitive non-RF applications | Select when NP functionality is unnecessary and board space permits larger dropout margin. |
| MCP1703T-3302E/MB | 250 mA, 3.3 V, ±0.4% accuracy, 600 mV dropout at 250 mA, integrated thermal foldback | Higher accuracy but higher dropout; no VCONT pin - requires external enable circuitry | Prefer for metrology-grade accuracy where ultra-low dropout is secondary to long-term drift stability. |
Compared with AP7361-33SG-7 and MCP1703T-3302E/MB, the AP1152ADU33 uniquely combines 105 mV dropout, 80 dB PSRR, and an NP terminal for noise tailoring - making it optimal for RF, imaging, and high-precision analog where both headroom and spectral purity are constrained.
Availability
AP1152ADU33 is available at Aetrix Electronics and suitable for RF power supplies, PLL/VCO biasing, low-noise image sensor units, high-speed ADC/DAC reference rails, and automotive infotainment systems requiring stable component supply across extended temperature ranges.
Supply support for AP1152ADU33 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 industrial, computing, consumer, and communications markets.
The AP1152 series is designed for high-PSRR, low-noise linear regulation in noise-sensitive analog and RF subsystems - targeting applications where switching regulator artifacts cannot be tolerated.
FAQ
What is the maximum input voltage for the AP1152ADU33?
The AP1152ADU33 supports an absolute maximum input voltage of 16 V, but its recommended operating range is 2.1 V to 14.5 V. Exceeding 14.5 V may trigger overvoltage stress and reduce reliability. For continuous operation, maintain VIN ≤ 14.5 V with appropriate derating above 85°C ambient.
Can the AP1152ADU33 operate with a 0.1 µF output capacitor?
Yes - the AP1152ADU33 is specifically characterized for stable operation with a 0.1 µF ceramic output capacitor when VOUT ≥ 2.5 V. This is confirmed in Section 1. General Description and Section 11.4, where 0.1 µF is listed as the minimum stable CL value for 3.3 V output. Larger values improve transient response and noise filtering.
How does the NP (Noise Pass) terminal affect performance of the AP1152ADU33?
The NP terminal on the AP1152ADU33 connects to an internal noise-reduction node. Adding a capacitor (0.001–0.1 µF) between NP and GND improves low-frequency PSRR by up to 20 dB and reduces integrated output noise - critical for image sensors and precision ADCs. Larger CNP values slow VOUT turn-on/turn-off timing.
What is the on/off control logic polarity for the AP1152ADU33?
The AP1152ADU33 uses high-active on/off control: VCONT ≥ 1.8 V enables regulation (ON state), while VCONT ≤ 0.35 V disables output (OFF state). An internal 500 kΩ pull-down resistor ensures automatic disable during floating or un-driven states - eliminating need for external pull-down resistors.
Is thermal shutdown protection included in the AP1152ADU33?
Yes - the AP1152ADU33 integrates thermal shutdown protection that disables VOUT when junction temperature reaches approximately 150°C. Once the die cools below the hysteresis threshold (~135°C), regulation automatically resumes. This protects against sustained overload or inadequate PCB heatsinking during continuous 300 mA operation.
AP1152ADU33 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):
- 3.3V
- 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
AP1152ADU33 FAQ
1.How can I place an order for AP1152ADU33 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1152ADU33 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 AP1152ADU33 reliable?
The price and inventory of AP1152ADU33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1152ADU33 is usually 5 days.
3.What payment methods are accepted for AP1152ADU33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1152ADU33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1152ADU33?
AP1152ADU33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1152ADU33 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 AP1152ADU33?
For technical support, including AP1152ADU33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1152ADU33 requirements.
6.How does Aetrix verify that AP1152ADU33 is sourced from the original manufacturer or authorized distributors?
All AP1152ADU33 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 AP1152ADU33 meets industry standards.
7.What is the process for return or replacement of AP1152ADU33?
All AP1152ADU33 units undergo pre-shipment inspection (PSI). If there is an issue with AP1152ADU33, 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 AP1152ADU33 part is unused and in its original packaging.
Return procedure for AP1152ADU33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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