My Inquiry
My Account
Diodes Incorporated PAM3101AAA150
- Part No.:
- PAM3101AAA150
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PAM3101AAA150.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PAM3101AAA150 from Diodes Incorporated is a 1.5V fixed-output, 300mA low-dropout linear regulator with 65µA quiescent current, 180mV dropout at 300mA, and 70dB PSRR at 1kHz-designed for power-sensitive portable electronics such as Bluetooth earphones and digital cameras where stable low-noise rail generation is critical.
For engineers reviewing the PAM3101AAA150 datasheet, PAM3101AAA150 pinout, PAM3101AAA150 application, or PAM3101AAA150 equivalent, key selection criteria include output voltage accuracy (±2%), thermal shutdown threshold (+150°C), EN pin logic (active-high, default floating), BYP capacitor requirement (10nF to GND), and compatibility with ≥2.2µF ceramic output capacitors.
Technical Context
The PAM3101AAA150 integrates a P-channel MOSFET pass transistor (RDS(on) ≈ 0.75Ω) enabling ultra-low ground current across load conditions. Its internal feedback loop maintains ±2% output voltage accuracy over line, load, and temperature variations while supporting fast discharge via dedicated VOUT-to-GND path when disabled.
It implements dual protection: current limiting (400mA typical) with short-circuit foldback and thermal shutdown with 30°C hysteresis (trip at +150°C, resume at +120°C). The BYP pin connects to an external 10nF capacitor forming a 200kΩ–10nF RC filter that reduces high-frequency output noise by >20dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% - ensures precise biasing for low-voltage logic and analog circuitry without external resistors. |
| Max Output Current | 300mA - supports moderate-power RF modules and sensor interfaces in compact portable designs. |
| Dropout Voltage | 180mV @ 300mA - enables operation down to 1.68V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for ADC reference and RF PLL supplies. |
| Quiescent Current | 65µA typ. - minimizes standby power loss, enabling multi-week battery life in always-on wearable sensors. |
| Shutdown Current | 0.01µA to 1µA - allows deep-sleep modes with negligible leakage during system idle states. |
| Thermal Shutdown | +150°C trip with +30°C hysteresis - prevents permanent damage during transient overload or poor PCB heatsinking. |
Pinout & Package
Package: SOT-23-3 (JEDEC TO-236AB), 2.92mm × 1.3mm × 1.0mm body, lead pitch 0.95mm, Pb-free matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Primary return path for load current and internal bias; must be low-impedance connection to PCB ground plane. |
| 2: VOUT | Regulated output | Delivers stable 1.5V to load; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for stability. |
| 3: VIN | Input supply | Accepts 2.5V–5.5V input; minimum valid input = 1.5V + VDROP ≈ 1.68V at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout architecture | P-channel MOSFET pass element (0.75Ω RDS(on)) eliminates N-channel driver complexity and enables sub-200mV dropout at rated current. |
| Active noise suppression | BYP pin with 10nF capacitor forms integrated RC filter reducing broadband output noise to 50µVRMS (10Hz–100kHz). |
| Fast transient response | 20mV spike on 1mA→300mA load step - enabled by low output impedance and optimized internal compensation for 2.2µF ceramic caps. |
| Robust protection suite | Combined current limit (400mA), short-circuit foldback, and thermal shutdown with hysteresis prevent latch-up or destruction under fault conditions. |
Applications
| Bluetooth Earphones | Digital Cameras |
|---|---|
|
Use Scenario: Powering MEMS microphones and Class-D audio amplifiers in ultra-compact wireless earbuds. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying analog front-end and codec bias rails. Use Value: 65µA quiescent current extends talk time between charges; 70dB PSRR isolates audio path from noisy Bluetooth radio supply. |
Use Scenario: Providing clean 1.5V supply to CMOS image sensor interface logic and flash memory controllers. IC Role / Device Role / Timing Role: Low-noise post-regulator for sensor I/O and memory data bus circuits. Use Value: ±2% output accuracy ensures reliable level-shifting and timing margin; fast discharge prevents residual voltage hold-up during power-down sequencing. |
| WLAN Modules | MP3 Players |
|
Use Scenario: Delivering regulated 1.5V to WLAN baseband processors and RF transceiver bias networks. IC Role / Device Role / Timing Role: Secondary LDO decoupling RF section from main system PMIC output. Use Value: 180mV dropout allows direct use of partially discharged 2.4V Li-poly battery; thermal shutdown protects during sustained TX bursts. |
Use Scenario: Supplying 1.5V to NAND flash memory and audio DAC in portable music players. IC Role / Device Role / Timing Role: Dedicated low-noise regulator for memory I/O and analog playback circuitry. Use Value: 2.2µF ceramic capacitor compatibility reduces board area vs. tantalum; shutdown current <1µA enables zero-power standby mode. |
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-15W5 | Same 1.5V output, but uses N-channel pass transistor requiring higher dropout (250mV @ 300mA); no BYP pin or fast discharge. | Lacks integrated noise filtering; requires external RC network for comparable PSRR performance. | Preferred only if cost sensitivity outweighs PSRR and noise requirements. |
| RT9161A-15PB | 1.5V output with 200mV dropout @ 300mA; includes enable pin but no BYP function; 80µA quiescent current. | Higher IQ reduces battery runtime in always-on applications; no dedicated bypass filter path limits high-frequency noise rejection. | Consider when thermal resistance (θJA = 150°C/W) is more critical than noise performance. |
Compared with AP2125K-15W5 and RT9161A-15PB, the PAM3101AAA150 delivers superior noise suppression via its dedicated BYP pin and achieves lower dropout with lower quiescent current-making it optimal for space-constrained, battery-powered audio and imaging systems demanding clean, efficient 1.5V regulation.
Availability
PAM3101AAA150 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital cameras, and WLAN modules requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for PAM3101AAA150 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 communications markets.
The PAM3101 belongs to Diodes' high-PSRR LDO family engineered specifically for noise-sensitive portable electronics-emphasizing ultra-low IQ, fast transient response, and robust fault protection in miniature packages.
FAQ
What is the minimum input voltage required for PAM3101AAA150 to regulate 1.5V at 300mA?
The minimum input voltage is determined by the dropout specification: VIN(MIN) = VOUT + VDROP. With a typical dropout of 180mV at 300mA, the minimum valid input is 1.68V. Operation below this voltage results in unregulated output and potential instability.
Can PAM3101AAA150 operate without the BYP capacitor?
Yes, the device functions without the 10nF BYP capacitor, but PSRR degrades significantly above 100kHz and output noise increases by ~25µVRMS. The BYP pin is optional for basic regulation but mandatory for applications requiring low-noise analog or RF supply rails.
Is the EN pin internally pulled up or does it require an external resistor?
The EN pin has no internal pull-up; per the datasheet, the "A" variant (PAM3101AAA150) defaults to floating. To ensure reliable startup, a 100kΩ pull-up to VIN is recommended. Leaving EN floating may cause erratic enable behavior due to noise coupling.
Does PAM3101AAA150 support ceramic output capacitors smaller than 2.2µF?
No-stability is guaranteed only with ≥2.2µF ceramic capacitors having ESR >5mΩ. Using smaller values risks oscillation or excessive overshoot during load transients. The 2.2µF minimum is a hard design constraint validated across all operating conditions in the datasheet.
PAM3101AAA150 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 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
PAM3101AAA150 FAQ
1.How can I place an order for PAM3101AAA150 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101AAA150 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 PAM3101AAA150 reliable?
The price and inventory of PAM3101AAA150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101AAA150 is usually 5 days.
3.What payment methods are accepted for PAM3101AAA150?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101AAA150 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101AAA150?
PAM3101AAA150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101AAA150 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 PAM3101AAA150?
For technical support, including PAM3101AAA150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101AAA150 requirements.
6.How does Aetrix verify that PAM3101AAA150 is sourced from the original manufacturer or authorized distributors?
All PAM3101AAA150 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 PAM3101AAA150 meets industry standards.
7.What is the process for return or replacement of PAM3101AAA150?
All PAM3101AAA150 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101AAA150, 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 PAM3101AAA150 part is unused and in its original packaging.
Return procedure for PAM3101AAA150:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PAM3101AAA150 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
