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Diodes Incorporated PAM3101AAA300
- Part No.:
- PAM3101AAA300
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PAM3101AAA300.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,137
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Product details
Overview
PAM3101AAA300 from Diodes Incorporated is a 3.3V, 300mA low-dropout linear regulator with 65µA quiescent current, 180mV dropout at full load, ±2% output accuracy, and 70dB PSRR at 1kHz-designed for power-sensitive portable electronics such as Bluetooth earphones and digital cameras.
For engineers reviewing the PAM3101AAA300 datasheet, PAM3101AAA300 pinout, PAM3101AAA300 application, or PAM3101AAA300 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 stability with ≥2.2µF ceramic output capacitance.
Technical Context
The PAM3101AAA300 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 temperature and line/load variations.
It features active-high enable control, a dedicated 10nF bypass pin for noise filtering, and dual protection circuitry: foldback current limiting (400mA typical) and thermal shutdown with 30°C hysteresis (trip at 150°C, resume at 120°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±2% - ensures stable core or I/O rail for 3.3V microcontrollers and RF ICs |
| Max Output Current | 300mA - supports moderate-power peripherals like camera sensors or audio codecs |
| Dropout Voltage | 180mV @ 300mA - enables operation down to 3.48V input, extending battery life in single-cell Li-ion systems |
| Quiescent Current | 65µA typ. - minimizes standby power loss in always-on wearable devices |
| PSRR | 70dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input |
| Shutdown Current | 0.01µA to 1µA - enables deep-sleep modes with negligible leakage in battery-backed systems |
| Thermal Shutdown | 150°C trip, 120°C recovery - protects against PCB-level overheating during sustained high-load operation |
Pinout & Package
Package: SOT-23-3 (JEDEC TO-236AB), 3-pin surface-mount package with exposed pad option (not electrically connected); footprint compatible with automated reflow assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.5V–5.5V; minimum required input = VO + VDROP (e.g., 3.48V for 3.3V output @ 300mA) |
| VOUT | Regulated output node | Delivers stable 3.3V; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for stability |
| GND | Power and signal reference | Common return path for VIN, VOUT, and internal bias circuits; must be low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout architecture | 180mV @ 300mA enables use with depleted Li-ion cells (down to ~3.48V) |
| Active-high enable control | EN pin tied to VIN by default (floating logic high); allows external MCU-driven power sequencing |
| Bypass pin with RC filter | BYP pin requires 10nF capacitor to GND-forms 80kHz low-pass filter reducing output noise to 50µVRMS |
| Integrated protection | Current limit (~400mA), short-circuit foldback, and thermal shutdown with hysteresis prevent latch-up or damage |
| Stability with small ceramics | Guaranteed stable with ≥2.2µF X5R/X7R ceramic output capacitors-no tantalum or electrolytic required |
Applications
| Bluetooth Earphones | Digital Cameras |
|---|---|
|
Use Scenario: Powering Bluetooth baseband IC and MEMS microphone 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 suppresses switching noise from adjacent buck converter, preventing audible artifacts. |
Use Scenario: Supplying image sensor interface and SD card controller in pocket-sized digital cameras. IC Role / Device Role / Timing Role: Low-noise 3.3V rail generator for high-speed parallel data paths and timing-critical I/O. Use Value: 65µA quiescent current extends standby time between shots; fast discharge prevents residual voltage hold-up. |
| MP3 Players | WLAN Modules |
|
Use Scenario: Regulating audio DAC and flash memory voltage in portable music players. IC Role / Device Role / Timing Role: Secondary LDO decoupling noisy system rails to preserve audio SNR. Use Value: ±2% output accuracy maintains consistent DAC reference, avoiding volume drift across battery discharge cycle. |
Use Scenario: Providing clean 3.3V supply to Wi-Fi transceiver IC in IoT edge nodes. IC Role / Device Role / Timing Role: Dedicated LDO isolating WLAN PHY from shared PMIC outputs. Use Value: Thermal shutdown at 150°C prevents reliability degradation during extended TX bursts in enclosed enclosures. |
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 fixed EN pull-down (requires external pull-up for enable); no BYP pin | Lacks dedicated noise-filtering bypass pin-requires external RC network for equivalent PSRR | Prefer when board space permits discrete bypass filtering and EN control is simplified |
| AP2127K-3.3TRG1 | Identical pinout and BYP functionality, but higher quiescent current (120µA typ.) and lower PSRR (60dB @ 1kHz) | Higher IQ reduces battery runtime in always-on wearables; lower PSRR may require additional input filtering | Choose only if AP2125/2127 family qualification is mandated by legacy design requirements |
Compared with AP2125K-3.3TRG1 and AP2127K-3.3TRG1, the PAM3101AAA300 delivers superior noise suppression (70dB vs. ≤60dB), lower quiescent current (65µA vs. ≥120µA), and integrated BYP filtering-making it optimal for battery-limited, noise-sensitive audio and RF subsystems.
Availability
PAM3101AAA300 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital cameras, and MP3 players requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PAM3101AAA300 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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM3101 belongs to Diodes' high-PSRR, low-IQ LDO product line-engineered specifically for portable electronics where battery life, noise immunity, and small-footprint power regulation are critical.
FAQ
What is the minimum input voltage required for PAM3101AAA300 to maintain 3.3V output at 300mA?
The minimum input voltage is VO + VDROP. Per datasheet, VDROP is 180mV typ. at 300mA for VO = 3.3V, so minimum VIN = 3.48V. At worst-case (230mV max dropout), VIN must be ≥3.53V to guarantee regulation under full load and temperature variation.
Can PAM3101AAA300 operate without the BYP capacitor?
Yes, but output noise increases significantly: without the 10nF BYP-to-GND capacitor, RMS noise rises from 50µV to >100µV. The BYP pin connects internally to a 200kΩ resistor forming a low-pass filter; omitting the capacitor degrades high-frequency PSRR and may affect sensitive RF or audio stages.
Is PAM3101AAA300 stable with a 1µF output capacitor?
No. The datasheet specifies ≥2.2µF ceramic output capacitance with ESR >5mΩ for guaranteed stability. A 1µF capacitor violates this requirement and may cause oscillation or poor transient response-verified in Figure 10 load-step testing showing 20mV spike only with compliant CO.
Does PAM3101AAA300 support reverse-voltage protection?
No. The device lacks intrinsic reverse-polarity protection. If VIN is accidentally driven below GND, the body diode of the internal P-MOSFET may conduct, risking damage. External series diode or ideal diode controller is required for systems with potential reverse-battery or hot-swap conditions.
PAM3101AAA300 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):
- 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-23-3
PAM3101AAA300 FAQ
1.How can I place an order for PAM3101AAA300 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101AAA300 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 PAM3101AAA300 reliable?
The price and inventory of PAM3101AAA300 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101AAA300 is usually 5 days.
3.What payment methods are accepted for PAM3101AAA300?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101AAA300 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101AAA300?
PAM3101AAA300 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101AAA300 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 PAM3101AAA300?
For technical support, including PAM3101AAA300 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101AAA300 requirements.
6.How does Aetrix verify that PAM3101AAA300 is sourced from the original manufacturer or authorized distributors?
All PAM3101AAA300 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 PAM3101AAA300 meets industry standards.
7.What is the process for return or replacement of PAM3101AAA300?
All PAM3101AAA300 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101AAA300, 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 PAM3101AAA300 part is unused and in its original packaging.
Return procedure for PAM3101AAA300:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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