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Diodes Incorporated PAM3101AAA330
- Part No.:
- PAM3101AAA330
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PAM3101AAA330.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
PAM3101AAA330 from Diodes Incorporated is a 3.3V fixed-output, 300mA low-dropout linear regulator with 65µA quiescent current, 180mV dropout at full load, ±2% output accuracy, and 70dB PSRR at 1kHz-designed for noise-sensitive battery-powered systems such as Bluetooth earphones and portable cameras.
For engineers reviewing the PAM3101AAA330 datasheet, PAM3101AAA330 pinout, PAM3101AAA330 application, or PAM3101AAA330 equivalent, key selection criteria include dropout voltage under 300mA load, thermal shutdown behavior at 150°C, EN pin logic (active-high), BYP capacitor requirement (10nF), and compatibility with ≥2.2µF ceramic output capacitors.
Technical Context
The PAM3101AAA330 integrates a P-channel MOSFET pass transistor (RDS(on) ≈ 0.75Ω) enabling ultra-low ground current across load conditions. Its internal bandgap reference and error amplifier deliver ±2% output voltage accuracy over line, load, and temperature.
It features active-high enable control, a dedicated 10nF bypass pin for noise filtering, thermal shutdown at 150°C with 30°C hysteresis, and current limiting set to ~400mA. Stability is guaranteed with ≥2.2µF ceramic output capacitance and ESR >5mΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures stable core/peripheral rail in portable SoC designs |
| Max Output Current | 300mA - supports moderate-power RF modules and audio codecs |
| Dropout Voltage | 180mV @ 300mA - enables operation down to 3.48V input, extending single-cell Li-ion runtime |
| Quiescent Current | 65µA typ. - minimizes standby power loss in always-on sensor nodes |
| PSRR | 70dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input |
| Shutdown Current | 0.01–1µA - enables deep-sleep modes with negligible battery drain |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects against PCB hotspots during sustained 300mA loads |
Pinout & Package
Package: SOT-23-3 (JEDEC TO-236), 3-pin surface-mount package with exposed pad option per DFN variant; footprint compatible with automated assembly and space-constrained handheld PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.5–5.5V; minimum input = VO + VDROP = 3.48V for full 300mA output |
| VOUT | Regulated output node | 3.3V fixed; requires ≥2.2µF ceramic capacitor to GND for stability |
| GND | Power and signal reference | Low-impedance return path; critical for PSRR and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout architecture | 180mV @ 300mA enables use with aging Li-ion cells (≥3.48V cutoff) |
| Active-high enable control | EN pin tied to VIN by default; allows system-level power sequencing via external MCU GPIO |
| Dedicated BYP pin | 10nF capacitor to GND forms RC filter with internal 200kΩ resistor, reducing output noise to 50µVRMS |
| Thermal & current protection | Auto-recovery thermal shutdown (150°C trip, 120°C resume) and foldback current limit prevent latch-up |
| Stability with low-ESR caps | Guaranteed stable with ≥2.2µF X5R/X7R ceramics (ESR >5mΩ), eliminating need for tantalum |
Applications
| Bluetooth Earphones | Digital Cameras |
|---|---|
Use Scenario: Powering Bluetooth baseband IC and audio DAC in compact wireless earbuds. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive RF and analog audio circuitry. Use Value: 70dB PSRR at 1kHz prevents audible switching noise coupling into audio path; 65µA IQ extends talk time between charges. |
Use Scenario: Providing clean 3.3V rail to image sensor interface and SD card controller. IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter, decoupling digital transients from analog pixel array. Use Value: 20mV load-transient spike (1mA→300mA) avoids image corruption; fast discharge prevents residual voltage hold-up during power-down. |
| WLAN Modules | MP3 Players |
Use Scenario: Supplying 3.3V to 2.4GHz WLAN transceiver IC in portable hotspot devices. IC Role / Device Role / Timing Role: Noise-suppressing LDO isolating RF section from noisy system power bus. Use Value: High PSRR rejects 100Hz–1MHz ripple from shared DC-DC stage; thermal shutdown prevents damage during antenna transmit bursts. |
Use Scenario: Regulating battery voltage to 3.3V for flash memory, display driver, and audio codec. IC Role / Device Role / Timing Role: Main system LDO delivering stable rail across variable playback and standby states. Use Value: 0.01µA shutdown current enables multi-week standby; ±2% accuracy maintains consistent DAC reference and display brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2125K-3.3TRG1 | Same 3.3V/300mA spec, but EN pin active-low; no BYP pin; 60dB PSRR @ 1kHz | Lacks dedicated noise-filtering bypass path; less suitable for ultra-low-noise audio/RF | Select when board layout lacks space for 10nF BYP cap or system uses active-low enable logic |
| MCP1700T-3302E/MB | 300mA, 3.3V, 1.6µA IQ, but 600mV dropout @ 250mA; no thermal shutdown | Higher dropout limits usable battery range; missing thermal protection reduces robustness in enclosed enclosures | Select only for ultra-low-IQ applications where dropout and thermal safety are secondary |
Compared with AP2125K-3.3TRG1 and MCP1700T-3302E/MB, the PAM3101AAA330 delivers superior noise suppression (70dB vs. ≤60dB), lower dropout (180mV vs. ≥600mV), and integrated thermal recovery-making it optimal for thermally constrained, noise-critical portable designs.
Availability
PAM3101AAA330 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital cameras, and WLAN modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PAM3101AAA330 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' precision LDO portfolio targeting portable electronics; it was engineered to replace older regulators in space- and noise-constrained battery-powered devices while maintaining pin compatibility with legacy footprints.
FAQ
What is the minimum input voltage required for 300mA output at 3.3V?
The minimum input voltage is VO + VDROP = 3.3V + 0.18V = 3.48V. Below this, regulation fails and output drops. At 2.5V input, maximum sustainable output current is limited by thermal dissipation and dropout headroom-not rated for full 300mA.
Can the BYP pin be left unconnected?
No. The BYP pin must be connected to a 10nF capacitor to GND to ensure specified 50µVRMS output noise and optimal PSRR. Leaving it floating degrades noise performance and may cause instability in sensitive analog circuits.
Is the PAM3101AAA330 pin-compatible with other PAM3101 variants?
No-pin configuration depends on suffix: AAA330 uses SOT-23-3 (VIN-VOUT-GND), while variants like PAM3101BAB330 use SOT-23-5 (VIN-GND-EN-BYP-VOUT). Mechanical and electrical pinouts differ; verify ordering code before PCB layout.
Does the device require an input capacitor?
Yes-an input capacitor ≥1µF ceramic is recommended to reduce source impedance and improve transient response. While not strictly required for stability, omitting it increases susceptibility to input ripple and may degrade PSRR performance above 10kHz.
PAM3101AAA330 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.23V @ 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-23-3
PAM3101AAA330 FAQ
1.How can I place an order for PAM3101AAA330 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101AAA330 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 PAM3101AAA330 reliable?
The price and inventory of PAM3101AAA330 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101AAA330 is usually 5 days.
3.What payment methods are accepted for PAM3101AAA330?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101AAA330 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101AAA330?
PAM3101AAA330 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101AAA330 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 PAM3101AAA330?
For technical support, including PAM3101AAA330 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101AAA330 requirements.
6.How does Aetrix verify that PAM3101AAA330 is sourced from the original manufacturer or authorized distributors?
All PAM3101AAA330 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 PAM3101AAA330 meets industry standards.
7.What is the process for return or replacement of PAM3101AAA330?
All PAM3101AAA330 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101AAA330, 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 PAM3101AAA330 part is unused and in its original packaging.
Return procedure for PAM3101AAA330:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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