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Asahi Kasei Microdevices/AKM AP1151ADS
- Part No.:
- AP1151ADS
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Package:
- SOT-23-6
- Datasheet:
-
AP1151ADS.pdf
- Description:
- IC REG LIN POS ADJ 200MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,443
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Product details
Overview
AP1151ADS from Diodes Incorporated is a 200mA adjustable-output low-dropout linear regulator with high PSRR, low noise, and On/Off control (high-active), designed for precision analog and RF power supply rails. It supports output voltages from 1.3V to 13.5V via external resistors, achieves 80dB ripple rejection at 1kHz, and operates across –40°C to +85°C with only a 0.22µF ceramic output capacitor.
For engineers reviewing the AP1151ADS datasheet, AP1151ADS pinout, AP1151ADS application, or AP1151ADS equivalent, this page delivers verified package mapping (SOT23-6), confirmed thermal shutdown and over-current protection, exact FB reference voltage (1.27V ±20mV), dropout performance (120mV @ 100mA), and validated noise bypass (NP) terminal behavior - all specific to the AP1151ADS variant.
Technical Context
The AP1151ADS implements a bandgap-referenced error amplifier driving an NPN pass transistor, with internal 500kΩ pull-down on VCONT and 320kΩ feedback divider network. Its NP terminal connects to an internal 1.27V reference node, enabling noise-sensitive applications by decoupling high-frequency ripple through an external capacitor.
Stability relies on external capacitors: minimum 0.22µF ceramic CL (output), 1.0µF CIN (input), and 0.001µF CNP (noise bypass); CFB (100pF) between VOUT and FB suppresses noise coupling. The regulator enters thermal shutdown at ~150°C and disables output when VCONT falls below 0.35V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 200mA max continuous; limited by thermal dissipation in SOT23-6 package (500mW rating) |
| Dropout Voltage | 120mV at 100mA load; enables regulation with VIN as low as VOUT + 0.12V |
| Ripple Rejection | 80dB at 1kHz; maintains clean output under switching supply ripple |
| Reference Voltage | 1.27V ±20mV at FB pin; sets output via R1/R2 divider with <±0.5% accuracy at typical conditions |
| Operating Range | 2.1V to 14.0V input; supports wide-input systems including automotive and industrial rails |
| Output Noise | 34µVrms (10Hz–100kHz); suitable for LNA, VCO, and high-precision ADC/DAC supplies |
| Quiescent Current | 78–125µA; enables low-power standby without external switch |
Pinout & Package
SOT23-6 package with exposed pad not present; standard plastic SOT23-6 outline per JEDEC TO-236AB. Pin 1 = VCONT, Pin 2 = GND, Pin 3 = VIN, Pin 4 = NP, Pin 5 = VOUT, Pin 6 = FB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCONT (Pin 1) | On/Off control input | High-active logic: ≥1.8V enables output; ≤0.35V disables output; internal 500kΩ pull-down ensures default OFF |
| GND (Pin 2) | Ground reference | Common return for all internal circuits; must be low-impedance connection to system ground plane |
| VIN (Pin 3) | Main power input | Accepts 2.1–14.0V; requires ≥1.0µF ceramic input capacitor placed adjacent to pins 2 and 3 |
| NP (Pin 4) | Noise bypass node | Connects to internal 1.27V reference; 0.001µF capacitor here improves PSRR below 100kHz |
| VOUT (Pin 5) | Regulated output | Delivers up to 200mA; stability requires ≥0.22µF ceramic capacitor directly between pins 5 and 2 |
| FB (Pin 6) | Feedback input | Monitors output via R1/R2 divider; 100pF capacitor between pins 5 and 6 reduces noise sensitivity |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output | 1.3–13.5V set externally via resistor divider; no fixed-voltage variants required in BOM |
| Low-Noise Operation | 34µVrms noise floor with NP capacitor; eliminates need for post-LDO filtering in RF signal chains |
| High PSRR | 80dB at 1kHz; rejects ripple from upstream DC/DC converters without additional LC stages |
| Thermal Protection | Automatic shutdown at ~150°C junction temperature; resumes operation after cooldown |
| Small-Capacitor Stability | Stable with 0.22µF ceramic output cap; reduces board area vs. traditional LDOs requiring ≥10µF |
Applications
| RF Power Supplies | PLL/VCO Power Rails |
|---|---|
Use Scenario: Powering RF front-end modules in cellular base stations and IoT transceivers where supply noise directly impacts EVM and phase noise. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering clean 3.3V or 5.0V to LNA and mixer ICs. Use Value: 34µVrms output noise and 80dB PSRR prevent RF carrier degradation and spurious emissions. | Use Scenario: Supplying voltage-controlled oscillators and phase-locked loops in clock generation circuits for FPGAs and data converters. IC Role / Device Role / Timing Role: Precision voltage source for VCO tuning and PLL charge pump biasing. Use Value: 1.27V ±20mV reference and <35ppm/°C output drift ensure stable oscillation frequency over temperature. |
| Image Sensor Biasing | High-Precision ADC/DAC Supplies |
Use Scenario: Providing regulated bias voltage to CMOS image sensors in medical endoscopes and industrial inspection cameras. IC Role / Device Role / Timing Role: Adjustable low-noise supply for analog pixel readout and column amplifiers. Use Value: 0.22µF ceramic capacitor compatibility enables compact layout near sensor die; 200mA headroom supports multi-lane readout. | Use Scenario: Powering 16-bit+ SAR and delta-sigma ADCs/DACs in test equipment and instrumentation. IC Role / Device Role / Timing Role: Ultra-low-noise analog supply rail decoupled from digital switching noise. Use Value: NP terminal bypassing reduces broadband noise that would otherwise degrade ENOB and SFDR performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1151AEU | Same silicon die but in PLP1822-6 package with exposed thermal pad; 1500mW power dissipation vs. 500mW for AP1151ADS | Required for >200mA continuous loads or high ambient temperatures (>60°C) where SOT23-6 thermal limits are exceeded | Select AP1151AEU when PCB layout allows larger footprint and thermal pad connection to ground plane |
| Torex XC6219B332MR-G | Fixed 3.3V output; 150mA max; 25µVrms noise; no NP terminal; SOT23-5 package | Limited to single-voltage designs; lacks adjustable output and noise-bypass capability of AP1151ADS | Choose only if fixed 3.3V output suffices and lower noise floor justifies reduced flexibility and current capability |
Compared with AP1151AEU, the AP1151ADS trades thermal performance for space-constrained layouts; compared with XC6219B332MR-G, it offers full voltage adjustability and superior PSRR at higher output current, making it suitable for multi-rail, noise-critical systems where design flexibility outweighs fixed-voltage simplicity.
Availability
AP1151ADS is available at Aetrix Electronics and suitable for RF power supplies, PLL/VCO biasing, and high-precision ADC/DAC applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP1151ADS 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 ICs for power management, signal integrity, and connectivity applications.
The AP1151 product line delivers high-PSRR, low-noise LDO regulators targeting RF, imaging, and precision analog subsystems where supply cleanliness directly impacts system-level performance metrics.
FAQ
What is the minimum output capacitor required for stable operation of the AP1151ADS?
The AP1151ADS is stable with a minimum 0.22µF ceramic output capacitor (CL) across the full operating temperature range. This value applies specifically to the AP1151ADS in SOT23-6 packaging and is validated per the manufacturer's recommended external circuit. Larger values improve transient response and reduce output noise, but 0.22µF remains the guaranteed minimum for stability. Tantalum capacitors may also be used if their ESR falls within the specified range.
Does the AP1151ADS include built-in protection features?
Yes, the AP1151ADS integrates over-current protection (OCP) and thermal shutdown protection (TSD). OCP activates during output short-circuit or excessive load conditions, limiting current to approximately 360mA. TSD disables the output when the junction temperature reaches ~150°C and automatically recovers once the die cools. These protections are inherent to the AP1151ADS silicon and do not require external components.
How does the NP (Noise Pass) terminal function in the AP1151ADS?
The NP terminal in the AP1151ADS connects internally to the 1.27V bandgap reference node. Adding a capacitor (typically 0.001µF) between NP and GND improves low-frequency PSRR and reduces output noise by shunting high-frequency reference noise. This feature is unique to the AP1151ADS and AP1151AEU variants and is explicitly documented in the AP1151 datasheet Section 11.6.
What is the recommended feedback resistor configuration for a 5.0V output using the AP1151ADS?
For a 5.0V output, the AP1151ADS datasheet recommends R1 = 120kΩ and R2 = 352kΩ, based on the formula VOUT = VFB × (1 + R2/R1) with VFB = 1.27V. This configuration ensures ≥10µA current through the divider, minimizing noise susceptibility at the FB pin. A 100pF capacitor between VOUT and FB further enhances stability and noise immunity in the AP1151ADS layout.
Is the AP1151ADS pin-compatible with other SOT23-6 LDOs?
No, the AP1151ADS has a proprietary pinout: Pin 1 = VCONT, Pin 2 = GND, Pin 3 = VIN, Pin 4 = NP, Pin 5 = VOUT, Pin 6 = FB. This differs from standard SOT23-6 LDOs (e.g., many TI or ON Semi parts), which typically place GND at Pin 2 or Pin 3 and lack an NP terminal. Direct replacement requires PCB redesign; the AP1151ADS must be used with its specified pin mapping and external components.
AP1151ADS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- 13.5V
- Voltage Dropout (Max):
- 0.39V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 2.2 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-23-6
AP1151ADS FAQ
1.How can I place an order for AP1151ADS through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1151ADS 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 AP1151ADS reliable?
The price and inventory of AP1151ADS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1151ADS is usually 5 days.
3.What payment methods are accepted for AP1151ADS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1151ADS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1151ADS?
AP1151ADS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1151ADS 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 AP1151ADS?
For technical support, including AP1151ADS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1151ADS requirements.
6.How does Aetrix verify that AP1151ADS is sourced from the original manufacturer or authorized distributors?
All AP1151ADS 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 AP1151ADS meets industry standards.
7.What is the process for return or replacement of AP1151ADS?
All AP1151ADS units undergo pre-shipment inspection (PSI). If there is an issue with AP1151ADS, 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 AP1151ADS part is unused and in its original packaging.
Return procedure for AP1151ADS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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