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Diodes Incorporated PAM3101DAB300
- Part No.:
- PAM3101DAB300
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PAM3101DAB300.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,833
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Product details
Overview
PAM3101DAB300 from Diodes Incorporated is a 3.0V fixed-output, 300mA low-dropout CMOS linear regulator in DFN1.6x1.6-6L package with active-high enable (EN), bypass (BYP), and ground (GND) terminals. It delivers ±2% output voltage accuracy, 180mV dropout at 300mA (VO=3.3V), 65µA quiescent current, and 70dB PSRR at 1kHz-optimized for noise-sensitive battery-powered audio and RF subsystems.
For engineers reviewing the PAM3101DAB300 datasheet, PAM3101DAB300 pinout, PAM3101DAB300 application, or PAM3101DAB300 equivalent, key selection criteria include dropout performance under 300mA load, thermal resistance (θJA = 175°C/W), EN logic compatibility, BYP capacitor requirement (10nF to GND), and stability with ≥2.2µF ceramic output capacitance.
Technical Context
The PAM3101DAB300 integrates a 0.75Ω P-channel MOSFET pass transistor enabling ultra-low ground current across load conditions. Its internal architecture includes precision bandgap reference, error amplifier, and thermal shutdown circuitry triggered at +150°C with +30°C hysteresis.
Regulation relies on feedback from VOUT to internal error amplifier, with BYP pin connecting to a 10nF capacitor that forms a 200kΩ–10nF RC filter to suppress high-frequency output noise. EN control enables system-level power sequencing without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V fixed, ±2% accuracy ensures stable core voltage for 3.0V I/O interfaces and low-power MCUs |
| Max Output Current | 300mA continuous-supports single-core microcontrollers or Bluetooth baseband ICs |
| Dropout Voltage | 180mV @ 300mA (VO ≥ 3.3V); enables operation down to VIN = 3.18V with 3.0V output |
| PSRR | 70dB @ 1kHz-suppresses switching noise from DC/DC converters feeding the LDO input |
| Quiescent Current | 65µA typical-extends battery life in always-on sensor nodes and wearables |
| Enable Threshold | VTH = 1.5V min (active-high)-compatible with 1.8V GPIOs without level-shifting |
| Thermal Shutdown | Triggers at TJ = +150°C; resumes at +120°C-prevents permanent damage during sustained overload |
Pinout & Package
DFN1.6x1.6-6L package: 1.6mm × 1.6mm, 0.5mm pitch, exposed thermal pad (EP) connected to GND for enhanced heat dissipation (θJA = 175°C/W, θJC = 65°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EN | Chip Enable input | Active-high logic control; default pull-high configuration enables immediate startup when VIN applied |
| 2: NC | No connection | Internally unconnected; must be left floating or tied to GND-no electrical function |
| 3: VIN | Input supply | Accepts 2.5V–5.5V; minimum VIN determined by VO + VDROP (e.g., 3.18V for 3.0V output) |
| 4: VOUT | Regulated output | Delivers stable 3.0V ±2%; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for stability |
| 5: NC | No connection | Internally unconnected; no routing or termination required |
| 6: GND | Ground reference | Return path for VIN, VOUT, and EN; connects to exposed thermal pad for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout with P-MOS pass device | 180mV @ 300mA enables extended battery runtime in single-cell Li-ion (3.0–4.2V) systems |
| BYP pin noise filtering | 10nF capacitor to GND creates 80Hz low-pass filter-reduces broadband output noise to 50µVRMS (10Hz–100kHz) |
| Fast discharge capability | Internal NMOS discharges VOUT when EN = low-prevents back-powering of upstream circuitry during shutdown |
| Thermal and current protection | Integrated OTP (+150°C trigger) and foldback current limit prevent failure during short-circuit or overtemperature events |
| Stable with small ceramics | Guaranteed stability with 2.2µF X5R/X7R ceramic capacitors-eliminates need for large tantalum or electrolytic caps |
Applications
| Bluetooth Audio Transmitter | Wi-Fi IoT Sensor Node |
|---|---|
|
Use Scenario: Powering Bluetooth 5.0 baseband IC and RF front-end in wireless earbuds. IC Role / Device Role / Timing Role: Low-noise 3.0V supply for analog RF sections and digital logic, rejecting noise from shared DC/DC converter. Use Value: 70dB PSRR at 1kHz prevents AM modulation of RF carrier by switching ripple; 65µA IQ extends talk time beyond 4 hours on 120mAh cell. |
Use Scenario: Supplying ESP32-WROOM-32 MCU and environmental sensors in battery-operated smart home node. IC Role / Device Role / Timing Role: Primary 3.0V rail for MCU core, Wi-Fi radio, and I²C sensors-enabled only during active transmission bursts. Use Value: Active-high EN allows precise power gating; 180mV dropout permits operation until battery reaches 3.18V, maximizing usable capacity. |
| Portable Medical Pulse Oximeter | USB-C Audio DAC Adapter |
|
Use Scenario: Powering optical sensor array and analog front-end in handheld SpO₂ monitor. IC Role / Device Role / Timing Role: Ultra-low-noise 3.0V source for photodiode transimpedance amplifier and ADC reference. Use Value: 50µVRMS output noise ensures <1 LSB error in 12-bit ADC conversion; ±2% VO accuracy maintains calibrated LED drive current. |
Use Scenario: Regulating 3.0V rail for AK4493EQ stereo DAC and headphone amplifier in compact USB-C dongle. IC Role / Device Role / Timing Role: Clean post-regulator after buck converter, decoupling DAC analog section from digital USB noise. Use Value: DFN1.6x1.6-6L footprint fits tight PCB space; BYP pin filtering eliminates audible hiss caused by 100kHz switching artifacts. |
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 |
|---|---|---|---|
| AP2125K-3.0TRG1 | Same 3.0V output, SOT-23-5 package; 150mV dropout @ 300mA; no BYP pin; 60µA IQ | Lacks BYP noise filtering-requires external RC network for equivalent noise suppression | Preferred where board space permits SOT-23-5 and noise requirements are less stringent |
| MCP1700T-3002E/MB | 3.0V output, SOT-23-3; 600mV dropout @ 250mA; 1.6µA IQ; no EN or BYP | No enable control or bypass-unsuitable for sequenced power domains or ultra-low-noise analog rails | Only viable for always-on, low-current (<100mA) applications where minimal IQ dominates design priority |
Compared with AP2125K-3.0TRG1 and MCP1700T-3002E/MB, the PAM3101DAB300 uniquely combines BYP-based noise filtering, active-high EN, and sub-200mV dropout in a 1.6mm² DFN-making it optimal for space-constrained, noise-sensitive portable audio and RF designs requiring precise power sequencing.
Availability
PAM3101DAB300 is available at Aetrix Electronics and suitable for Bluetooth earphones, portable medical monitors, and USB-C audio adapters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for PAM3101DAB300 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 consumer, industrial, and automotive markets.
The PAM3101 belongs to Diodes' high-PSRR, low-IQ LDO family-designed specifically for battery-powered portable electronics where noise rejection, small footprint, and extended runtime are critical system requirements.
FAQ
What is the minimum input voltage required for stable 3.0V output at 300mA?
The minimum input voltage is VO + VDROP = 3.0V + 0.18V = 3.18V, based on the 180mV typical dropout at 300mA and 3.0V output. At higher temperatures or lower loads, dropout decreases; at 100mA, it drops to ~120mV, allowing VIN as low as 3.12V.
Can the BYP pin be left unconnected?
No. The BYP pin must be connected to a 10nF ceramic capacitor to GND to ensure specified 50µVRMS output noise and 70dB PSRR. Leaving it open degrades high-frequency noise rejection and may cause instability under transient load conditions.
Is the DFN1.6x1.6-6L package RoHS-compliant and lead-free?
Yes. Per Diodes Incorporated's ordering information and marking documentation, PAM3101DAB300 uses Pb-free plating and complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for reflow soldering.
Does the PAM3101DAB300 require an input capacitor?
Yes. A minimum 1µF ceramic capacitor is recommended at VIN to suppress high-frequency noise and reduce input impedance. While not strictly required for stability, omitting it increases susceptibility to line transients and degrades PSRR above 10kHz.
PAM3101DAB300 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- 70dB ~ 65dB (100Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
PAM3101DAB300 FAQ
1.How can I place an order for PAM3101DAB300 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101DAB300 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 PAM3101DAB300 reliable?
The price and inventory of PAM3101DAB300 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101DAB300 is usually 5 days.
3.What payment methods are accepted for PAM3101DAB300?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101DAB300 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101DAB300?
PAM3101DAB300 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101DAB300 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 PAM3101DAB300?
For technical support, including PAM3101DAB300 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101DAB300 requirements.
6.How does Aetrix verify that PAM3101DAB300 is sourced from the original manufacturer or authorized distributors?
All PAM3101DAB300 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 PAM3101DAB300 meets industry standards.
7.What is the process for return or replacement of PAM3101DAB300?
All PAM3101DAB300 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101DAB300, 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 PAM3101DAB300 part is unused and in its original packaging.
Return procedure for PAM3101DAB300:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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