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Diodes Incorporated PAM3101FKF180
- Part No.:
- PAM3101FKF180
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
PAM3101FKF180.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
PAM3101FKF180 from Diodes Incorporated is a 1.8V fixed-output, 300mA low-dropout linear regulator in DFN1.6x1.6-6L package with enable control, 180mV dropout at full load, ±2% output accuracy, and 70dB PSRR at 1kHz - designed for noise-sensitive battery-powered subsystems such as Bluetooth earphone power rails.
For engineers reviewing the PAM3101FKF180 datasheet, PAM3101FKF180 pinout, PAM3101FKF180 application, or PAM3101FKF180 equivalent, key selection criteria include dropout voltage under 300mA load, shutdown current <1µA, thermal performance in DFN1.6x1.6, BYP pin noise filtering capability, and compatibility with 2.2µF ceramic output capacitors.
Technical Context
The PAM3101FKF180 integrates a P-channel MOSFET pass transistor (RDS(on) ≈ 0.75Ω) enabling ultra-low quiescent current (65µA typ.) across load conditions. Its internal bandgap reference and error amplifier deliver ±2% output voltage accuracy over line, load, and temperature.
It features active high EN control, a dedicated BYP pin for 10nF noise-filtering capacitor, 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 | 1.8V fixed, ±2% accuracy ensures stable core logic supply for low-voltage MCUs and audio codecs |
| Max Output Current | 300mA continuous - sufficient for single-core microcontrollers or RF transceivers in portable devices |
| Dropout Voltage | 180mV @ 300mA (VO = 3.3V); for VO = 1.8V, VDROP ≤ 230mV - extends usable battery life down to ~2.03V input |
| PSRR | 70dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input rail |
| Quiescent Current | 65µA typical - minimizes standby power loss in always-on sensor or BLE subsystems |
| Shutdown Current | 0.01–1µA - enables deep-sleep modes with sub-µA system leakage budgets |
| Thermal Resistance θJA | 175°C/W (DFN1.6x1.6) - supports 570mW max internal dissipation at +25°C ambient |
Pinout & Package
DFN1.6x1.6-6L package: 1.6mm × 1.6mm, 0.5mm pitch, exposed thermal pad (GND-connected), moisture sensitivity level 1, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EN | Chip Enable (active high) | EN default floating; tie to VIN for always-on operation; pull low for <1µA shutdown mode |
| 2: NC | No Connection | Unbonded die pad - must remain unconnected and unshorted to adjacent pins |
| 3: VIN | Input Supply | Accepts 2.5–5.5V; minimum VIN = VO + VDROP ≈ 2.03V for 1.8V output |
| 4: VOUT | Regulated Output | 1.8V ±2%; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for stability |
| 5: NC | No Connection | Unbonded die pad - no PCB trace or solder connection permitted |
| 6: GND | Ground / Thermal Pad | Primary return path and thermal conduction node; must be solidly connected to large copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | P-channel MOSFET pass device enables 180mV dropout at 300mA and maintains 65µA IQ across load range |
| BYP Pin Noise Filtering | Internal 200kΩ resistor + external 10nF capacitor forms RC filter reducing output noise to 50µVRMS (10Hz–100kHz) |
| Fast Discharge Function | Internal NMOS discharges VOUT when EN is deasserted - prevents back-powering of upstream circuitry |
| Robust Protection Set | Thermal shutdown (+150°C trip), current limit (~400mA), short-circuit protection, and reverse-current blocking |
| Small-Signal Stability | Stable with 2.2µF ceramic output cap (ESR ≥5mΩ); no ESR tuning required unlike older LDO architectures |
Applications
| Bluetooth Earphone Power Rail | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powers Bluetooth audio codec and RF transceiver in compact earbuds where battery voltage drops from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying digital core and PLL circuits; EN synchronized to host MCU sleep/wake signals. Use Value: 180mV dropout extends usable battery capacity by ~12% compared to 300mV-dropout alternatives; 70dB PSRR isolates codec from noisy DC-DC converter ripple. |
Use Scenario: Provides clean 1.8V bias to CMOS image sensor interface logic during burst capture sequences. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled via BYP pin; fast discharge prevents sensor latch-up during power cycling. Use Value: 50µVRMS output noise avoids pixel-level artifacts; 300mA rating handles transient current spikes during frame readout without droop. |
| MP3 Player Audio DAC Supply | WLAN Module Baseband Core |
|
Use Scenario: Supplies 1.8V to stereo DAC and headphone amplifier in portable music players with Li-ion battery input. IC Role / Device Role / Timing Role: Post-regulator after main DC-DC stage; BYP pin filters switching noise before entering sensitive analog signal chain. Use Value: 70dB PSRR at 1kHz attenuates 1MHz DC-DC harmonics by >40dB; ±2% accuracy ensures consistent DAC reference scaling across temperature. |
Use Scenario: Powers baseband processor core in 802.11n WLAN modules operating from shared 3.3V system rail. IC Role / Device Role / Timing Role: Dedicated low-noise 1.8V domain regulator; EN controlled by WLAN SoC to gate power during idle periods. Use Value: 0.01µA shutdown current reduces standby power by >95% vs. non-shutdown LDOs; DFN1.6x1.6 footprint saves 40% board area vs. SOT-23. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, enable-controlled LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2125K-1.8TRG1 | Same 1.8V output, 300mA, but SOT-23-5 package; no BYP pin; PSRR = 65dB @ 1kHz | Lacks dedicated noise-filtering BYP pin; higher θJA (250°C/W) limits power handling in dense layouts | Prefer when board space allows SOT-23 and noise requirements are less stringent than 50µVRMS |
| AP2127K-1.8TRG1 | 1.8V/300mA with BYP pin, SC-70-5 package; PSRR = 70dB @ 1kHz; IQ = 75µA | SC-70-5 has higher θJA (300°C/W); smaller thermal pad limits sustained 300mA operation above +40°C ambient | Choose only for ultra-compact designs where DFN1.6x1.6 reflow or thermal management is impractical |
Compared with AP2125K-1.8TRG1 and AP2127K-1.8TRG1, the PAM3101FKF180 uniquely combines DFN1.6x1.6's thermal efficiency (θJA = 175°C/W), integrated BYP filtering, and lowest quiescent current (65µA), making it optimal for thermally constrained, noise-sensitive 1.8V domains.
Availability
PAM3101FKF180 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital camera sensors, MP3 player audio DACs, and WLAN module baseband cores requiring stable component supply with long-term lifecycle support.
Supply support for PAM3101FKF180 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' precision low-dropout regulator product line, engineered specifically for portable electronics demanding ultra-low IQ, high PSRR, and compact packaging without sacrificing protection or stability.
FAQ
What is the minimum input voltage required for PAM3101FKF180 to regulate 1.8V output at 300mA?
The minimum input voltage is VO + VDROP. Per datasheet, VDROP ≤ 230mV at 300mA for VO ≥ 1.8V. Thus, minimum VIN = 1.8V + 0.23V = 2.03V. Below this, regulation fails and VOUT follows VIN minus dropout.
Can the BYP pin be left unconnected, or is the 10nF capacitor mandatory?
The 10nF capacitor on the BYP pin is mandatory for achieving specified 50µVRMS output noise and 70dB PSRR. Leaving BYP open degrades noise performance significantly and may cause instability under certain load transients due to missing internal compensation path.
Does PAM3101FKF180 require an input capacitor, and if so, what value and type?
An input capacitor (CIN ≥ 1µF) is recommended to reduce input impedance and suppress source ripple. Ceramic capacitors are preferred. While not strictly required for stability, omitting CIN increases susceptibility to input voltage spikes and degrades PSRR above 10kHz.
How does the fast discharge function operate, and when is it active?
The internal NMOS discharge switch connects VOUT to GND when EN is low (shutdown mode). It activates within microseconds of EN deassertion and remains active until EN rises above VTH (1.5V). This prevents back-powering of upstream circuitry and ensures rapid VOUT ramp-down during system reset.
PAM3101FKF180 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 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:
- 6-DFN (1.6x1.6)
PAM3101FKF180 FAQ
1.How can I place an order for PAM3101FKF180 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3101FKF180 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 PAM3101FKF180 reliable?
The price and inventory of PAM3101FKF180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101FKF180 is usually 5 days.
3.What payment methods are accepted for PAM3101FKF180?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101FKF180 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3101FKF180?
PAM3101FKF180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3101FKF180 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 PAM3101FKF180?
For technical support, including PAM3101FKF180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101FKF180 requirements.
6.How does Aetrix verify that PAM3101FKF180 is sourced from the original manufacturer or authorized distributors?
All PAM3101FKF180 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 PAM3101FKF180 meets industry standards.
7.What is the process for return or replacement of PAM3101FKF180?
All PAM3101FKF180 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101FKF180, 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 PAM3101FKF180 part is unused and in its original packaging.
Return procedure for PAM3101FKF180:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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