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Diodes Incorporated PAM3101DAB280
- Part No.:
- PAM3101DAB280
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PAM3101DAB280.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
PAM3101DAB280 from Diodes Incorporated is a 2.8V fixed-output, 300mA low-dropout CMOS linear regulator in DFN1.6x1.6-6L package with enable (EN) and bypass (BYP) pins. It delivers ±2% output voltage accuracy, 180mV dropout at 300mA, 65µA quiescent current, and 70dB PSRR at 1kHz-optimized for noise-sensitive battery-powered portable electronics.
For engineers reviewing the PAM3101DAB280 datasheet, PAM3101DAB280 pinout, PAM3101DAB280 application, or PAM3101DAB280 equivalent, key selection criteria include dropout performance under 300mA load, EN logic polarity (active-high), BYP capacitor requirement (10nF to GND), thermal resistance (θJA = 175°C/W), and compatibility with ≥2.2µF ceramic output capacitors.
Technical Context
The PAM3101DAB280 integrates a 0.75Ω P-channel MOSFET pass transistor enabling ultra-low ground current across load conditions. Its internal feedback loop maintains regulation with 2.2µF minimum output capacitance and requires a 10nF capacitor on the BYP pin to form a 200kΩ–10nF RC filter that suppresses high-frequency output noise.
Enable control is active-high with VTH = 1.5V min and VTL = 0.3V max; shutdown current is 0.01–1µA. Thermal protection activates at +150°C junction temperature with +30°C hysteresis, and device operation is specified from –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% - ensures stable core voltage for 2.8V I/O rails in Bluetooth earphones and MP3 players. |
| Max Output Current | 300mA - supports moderate-power RF sections and audio codecs without thermal derating in DFN1.6x1.6 package. |
| Dropout Voltage | 180mV @ 300mA - enables operation down to 2.98V input, extending usable battery life in single-cell Li-ion systems. |
| PSRR | 70dB @ 1kHz - attenuates switching noise from DC-DC converters feeding the LDO input, critical for analog audio paths. |
| Quiescent Current | 65µA typ. - minimizes standby power loss in always-on subsystems like Bluetooth LE receivers. |
| Enable Threshold | VTH = 1.5V min - compatible with 1.8V/3.3V GPIOs without level-shifting; EN default pull-high per ordering code DAB. |
| BYP Capacitor | 10nF to GND - forms integrated RC filter reducing broadband output noise to 50µVRMS (10Hz–100kHz). |
Pinout & Package
DFN1.6x1.6-6L package: 1.6mm × 1.6mm body, 0.4mm pitch, exposed thermal pad (GND-connected), moisture sensitivity level 1, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EN | Chip Enable input | Active-high logic control; internal pull-up ensures default ON state-no external resistor needed. |
| 2: NC | No connection | Unbonded die pad; must be left floating or tied to GND-no electrical function. |
| 3: VIN | Input supply | Accepts 2.5V–5.5V; requires ≥1µF ceramic input capacitor within 0.5 inch of pin for stability. |
| 4: VOUT | Regulated output | Delivers 2.8V ±2%; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for loop stability. |
| 5: NC | No connection | Unbonded die pad; must be left floating or tied to GND-no electrical function. |
| 6: GND | Ground reference & thermal path | Primary return path and thermal conduction node; exposed pad must be soldered to PCB copper for θJA = 175°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout with PMOS pass element | 180mV @ 300mA enables use with depleted Li-ion cells (≥2.98V) while maintaining regulation. |
| Integrated BYP filter network | Internal 200kΩ resistor + external 10nF capacitor reduces output noise to 50µVRMS, improving SNR in audio DACs. |
| Thermal shutdown with hysteresis | +150°C trip / +120°C recovery prevents latch-up during transient overload or poor PCB heatsinking. |
| Current limit & short-circuit protection | 400mA foldback current limit protects against sustained overloads and output shorts without external components. |
| Ultra-low quiescent current | 65µA ground current at full load extends battery runtime in always-on wearable sensors and BLE peripherals. |
Applications
| Bluetooth Earphones | Digital Cameras |
|---|---|
|
Use Scenario: Powering 2.8V audio codec and RF transceiver in compact wireless earbuds. IC Role / Device Role / Timing Role: Primary LDO supplying clean, low-noise bias to analog audio stages and 2.4GHz RF front-end. Use Value: 70dB PSRR at 1kHz suppresses switching noise from adjacent buck converter, preventing audible beat tones in audio output. |
Use Scenario: Regulating 2.8V for image sensor interface and flash LED driver IC in pocket-sized digital cameras. IC Role / Device Role / Timing Role: Low-noise voltage source for CMOS image sensor analog supply and high-speed LVDS serializer. Use Value: 180mV dropout allows operation until battery reaches 2.98V, maximizing capture time per charge cycle. |
| MP3 Players | WLAN Modules |
|
Use Scenario: Supplying 2.8V to DSP core and headphone amplifier in portable music players. IC Role / Device Role / Timing Role: Stable, low-ripple power rail for audio signal chain and Class AB headphone driver. Use Value: 50µVRMS output noise (10Hz–100kHz) preserves dynamic range and THD+N performance in 24-bit playback. |
Use Scenario: Providing 2.8V bias to WLAN baseband processor and RF transceiver in embedded IoT modules. IC Role / Device Role / Timing Role: Secondary LDO decoupling noisy system rail for sensitive RF receiver LNA and mixer stages. Use Value: Fast discharge feature discharges VOUT within microseconds upon EN deactivation, meeting WLAN sleep-state leakage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2125K-2.8TRG1 | Same 2.8V output, SOT-23-5 package, 150mA rating, no BYP pin, 60µA IQ | Limited to lower-current digital loads; lacks noise-filtering capability for analog/audio use | Select when board space is constrained and output noise <50µV RMS is not required |
| AP2127K-2.8TRG1 | 2.8V output, SOT-23-5, 300mA rating, no BYP pin, 65µA IQ, 250mV dropout @300mA | Higher dropout reduces usable battery range; no integrated noise filter necessitates external RC network | Choose only if DFN footprint is incompatible and thermal budget allows higher θJA (250°C/W) |
Compared with AP2125K-2.8TRG1 and AP2127K-2.8TRG1, the PAM3101DAB280 uniquely combines 300mA capability, 180mV dropout, and integrated BYP filtering-enabling direct replacement in noise-critical 2.8V analog rails without redesigning the output network.
Availability
PAM3101DAB280 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital cameras, and portable audio devices requiring stable component supply with guaranteed long-term sourcing and full traceability.
Supply support for PAM3101DAB280 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The PAM3101 belongs to Diodes' high-PSRR, low-IQ LDO family targeting portable battery-powered systems where noise suppression, efficiency, and small-footprint packaging are essential.
FAQ
What is the recommended output capacitor for PAM3101DAB280?
A minimum 2.2µF ceramic capacitor with ESR >5mΩ is required for stability. X5R or X7R dielectrics are preferred. Larger values improve load-transient response but do not affect loop stability. The capacitor must be placed close to VOUT and GND pins to minimize parasitic inductance.
Does PAM3101DAB280 require an input capacitor?
Yes-a minimum 1µF ceramic input capacitor is recommended and must be placed within 0.5 inch of the VIN pin. This reduces input impedance at high frequencies and prevents instability due to source inductance, especially when powered from a switching regulator output.
How does the BYP pin function in PAM3101DAB280?
The BYP pin connects internally to a 200kΩ resistor; a 10nF capacitor to GND forms a low-pass filter that reduces high-frequency output noise to 50µVRMS. Increasing capacitance lowers noise further but increases startup time-10nF is the optimal trade-off per datasheet characterization.
Is PAM3101DAB280 suitable for automotive applications?
No-its operating ambient temperature range is –40°C to +85°C, and it lacks AEC-Q100 qualification. Diodes does not specify automotive-grade reliability testing, stress screening, or PPAP documentation for this part. Use only in commercial or industrial portable equipment.
PAM3101DAB280 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- 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
PAM3101DAB280 FAQ
1.How can I place an order for PAM3101DAB280 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101DAB280 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 PAM3101DAB280 reliable?
The price and inventory of PAM3101DAB280 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101DAB280 is usually 5 days.
3.What payment methods are accepted for PAM3101DAB280?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101DAB280 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101DAB280?
PAM3101DAB280 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101DAB280 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 PAM3101DAB280?
For technical support, including PAM3101DAB280 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101DAB280 requirements.
6.How does Aetrix verify that PAM3101DAB280 is sourced from the original manufacturer or authorized distributors?
All PAM3101DAB280 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 PAM3101DAB280 meets industry standards.
7.What is the process for return or replacement of PAM3101DAB280?
All PAM3101DAB280 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101DAB280, 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 PAM3101DAB280 part is unused and in its original packaging.
Return procedure for PAM3101DAB280:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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