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Diodes Incorporated PAM2304BKFADJ
- Part No.:
- PAM2304BKFADJ
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
PAM2304BKFADJ.pdf
- Description:
- IC REG BUCK ADJ 1A SYNC 6TDFN
- Quantity:
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Inventory:4,153
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Product details
Overview
PAM2304BKFADJ from Diodes Incorporated is an adjustable-output, synchronous step-down DC-DC converter optimized for portable battery-powered systems. It delivers up to 1A output current with 3MHz fixed-frequency PWM control, 0.6V reference voltage, and power-saving PSM mode achieving 40µA quiescent current - enabling long runtime in smart phones and wireless peripherals powered by single Li+/Li-polymer or dual alkaline cells.
For engineers reviewing the PAM2304BKFADJ datasheet, PAM2304BKFADJ pinout, PAM2304BKFADJ application, or PAM2304BKFADJ equivalent, key selection criteria include its U-DFN2020-6 (Type C) thermal performance (θJA = 68°C/W), 2.5–5.5V input range, 0.6–VIN adjustable output, and integrated high-side/low-side MOSFETs with RDS(ON) ≤ 0.45Ω / ≤ 0.50Ω.
Technical Context
The PAM2304BKFADJ employs current-mode control with internal 3MHz oscillator and pulse-skipping modulation (PSM) for light-load efficiency. Its feedback loop references a precise 0.6V threshold at the FB pin, enabling stable regulation across input voltages from 2.5V to 5.5V and output loads up to 1A.
It integrates both P-channel high-side and N-channel low-side synchronous rectifier MOSFETs, eliminating external diode losses. Protection features include cycle-by-cycle overcurrent limiting (1.5A peak), thermal shutdown at +150°C with +30°C hysteresis, and under-voltage lockout to prevent deep battery discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single Li+/Li-polymer cell, USB 5V, or dual alkaline/NiMH batteries without external regulators. |
| Output Voltage Range | 0.6V to VIN - adjustable via external resistor divider; 0.6V reference enables low-noise core logic supply generation. |
| Switching Frequency | 3MHz - enables use of compact 1µH inductors and ceramic capacitors, reducing solution footprint and EMI filtering burden. |
| Quiescent Current | 40µA (typ) - extends battery life in standby/sleep modes of portable electronics without compromising startup time. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(ON) MOSFETs (0.30Ω/0.35Ω typ), minimizing conduction loss at 1A load. |
| Shutdown Current | <1µA - isolates input from output during system sleep, preventing battery drain in always-on subsystems. |
| Thermal Resistance θJA | 68°C/W (U-DFN2020-6) - allows 980mW max internal power dissipation at TA = +25°C, supporting continuous 1A operation with minimal PCB copper area. |
Pinout & Package
Package: U-DFN2020-6 (Type C), 2.0mm × 2.0mm × 0.6mm, wettable flank, RoHS-compliant, halogen- and antimony-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch Node | Drain connection of internal high-side P-MOSFET and low-side N-MOSFET; requires short, low-inductance routing to inductor and input/output capacitors. |
| 2 - NC | No Connect | Internally unconnected; must remain floating - no external tie or pull-up/down. |
| 3 - FB | Feedback Input | Senses output voltage via resistor divider; 0.6V internal reference sets regulation point; sensitive node requiring guard ring and separation from SW. |
| 4 - EN | Enable Control | Active-high logic input; ≥1.5V enables regulator, ≤0.3V disables with <1µA shutdown current; compatible with GPIO or battery monitor outputs. |
| 5 - VIN | Main Power Input | Supplies internal circuitry and high-side switch; requires local 10µF ceramic capacitor with low ESR placed adjacent to pin. |
| 6 - GND | Ground Reference | Common return for analog and power circuits; must be connected to low-impedance ground plane beneath IC to minimize noise coupling into FB. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated P- and N-channel MOSFETs eliminate external Schottky diode, reducing conduction loss and improving efficiency above 300mA load. |
| Pulse-Skipping Modulation (PSM) | Reduces switching frequency under light load to maintain >85% efficiency at 10mA output, extending battery life in intermittent-use devices. |
| Soft-Start | Digital-controlled ramp limits inrush current during startup, preventing input voltage sag and output overshoot without external components. |
| Over-Temperature Protection | Shuts down at +150°C junction temperature and auto-restarts at +120°C, protecting against sustained overload or poor heatsinking in sealed enclosures. |
| Short-Circuit Protection | Cycle-by-cycle current limit clamps peak inductor current to 1.5A; enters 1MHz low-duty-cycle mode during fault, limiting average input current to ~200mA. |
Applications
| Smartphone Core Supply | Wireless Headset PMU |
|---|---|
|
Use Scenario: Regulating 1.2V/1.5V/1.8V core voltage for application processors or RF transceivers in space-constrained smartphone mainboard designs. IC Role / Device Role / Timing Role: Primary buck converter delivering tightly regulated, low-noise DC power with fast transient response to dynamic CPU load changes. Use Value: 3MHz switching enables <2mm² total solution size using 1µH inductor and 0402/0603 ceramics; 95% efficiency minimizes thermal impact on adjacent sensors and displays. |
Use Scenario: Providing clean, adjustable bias for Bluetooth SoC and MEMS microphones in true wireless stereo (TWS) earbuds with tight battery capacity constraints. IC Role / Device Role / Timing Role: System PMU buck stage managing battery-to-core conversion while coordinating with enable signals from host MCU during sleep/wake cycles. Use Value: 40µA quiescent current and sub-1µA shutdown extend shelf life and active talk time; U-DFN2020-6 package fits within 3×3mm module footprints. |
| Digital Camera Sensor Bias | Portable Medical Monitor |
|
Use Scenario: Generating stable 2.5V/3.3V rail for CMOS image sensor analog front-end and ADC in compact action cameras or drone gimbals. IC Role / Device Role / Timing Role: High-PSRR, low-noise power source synchronized to sensor frame timing to suppress switching artifacts in captured imagery. Use Value: 0.6V reference and precision FB threshold (±2%) ensure accurate output setting; PSM mode eliminates audible coil whine during video recording pauses. |
Use Scenario: Powering microcontroller, display backlight, and analog signal chain in handheld ECG or SpO₂ monitors operating from two AA alkaline cells. IC Role / Device Role / Timing Role: Main system regulator maintaining output stability across wide input range (2.5–5.5V) as battery discharges from 3.2V to 1.8V per cell. Use Value: UVLO prevents unsafe deep discharge below 2.5V; thermal shutdown protects against enclosure overheating during extended clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP61100 (Diodes Inc.) | Higher 1A continuous output rating, 2.5–5.5V input, 0.6V reference, 1.5MHz switching, lower IQ (25µA), improved thermal resistance (θJA = 50°C/W in U-DFN2020-6). | Designed for next-gen portable devices requiring longer battery life and higher reliability; replaces PAM2304 in new designs per manufacturer notice. | Select AP61100 for new designs needing lower quiescent current, better thermal margin, and extended product lifecycle support. |
| TPS62231 (Texas Instruments) | 3MHz switching, 0.6V reference, 1A output, 2.05–6.0V input, 18µA IQ, integrated soft-start, but uses 6-pin SOT-23 package (larger footprint, higher θJA = 215°C/W). | Offers tighter output accuracy (±1%) and broader input range, but lacks PSM mode and has inferior thermal performance in standard SOT-23 layout. | Choose TPS62231 only if board space permits larger package and design prioritizes input voltage flexibility over thermal density. |
Compared with PAM2304BKFADJ, AP61100 delivers superior thermal efficiency and lower standby consumption for new designs, while TPS62231 trades package size and thermal capability for wider input tolerance and higher accuracy - making PAM2304BKFADJ optimal for cost-sensitive legacy portable designs where U-DFN2020-6 footprint and 3MHz operation are critical.
Availability
PAM2304BKFADJ is available at Aetrix Electronics and suitable for smartphone core supplies, wireless headset PMUs, digital camera sensor bias, and portable medical monitors requiring stable component supply with full traceability and long-term industrial availability.
Supply support for PAM2304BKFADJ 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for consumer, computing, communications, industrial, and automotive markets.
The PAM2304 belongs to Diodes' high-efficiency DC-DC converter product line, engineered specifically for ultra-compact, battery-operated portable electronics demanding minimal quiescent current, small solution size, and robust protection features.
FAQ
What is the recommended minimum output capacitance for stable operation?
The datasheet specifies 10µF ceramic output capacitance (X5R/X7R dielectric) as standard for typical applications. Lower values down to 4.7µF may be used with careful attention to ESR and ripple current ratings, but 10µF ensures adequate phase margin and transient response across all load and input conditions.
Can PAM2304BKFADJ operate in 100% duty cycle dropout mode?
Yes - when VIN drops near VO, the device enters dropout mode with the high-side P-MOSFET fully enhanced. Output voltage becomes VO ≈ VIN – IOUT × (RDS(ON)_P + RL), where RDS(ON)_P is ≤ 0.45Ω and RL is inductor DCR; this maintains regulation without shutdown.
Is the FB pin internally biased, and what is its input current?
The FB pin connects directly to the inverting input of an internal error amplifier with 0.6V reference. Its input bias current is ±10nA (max), allowing use of high-value resistor dividers (e.g., 540kΩ/120kΩ for 3.3V) without significant voltage error or power loss.
How does thermal shutdown behave during sustained overload?
When junction temperature exceeds +150°C, the device latches off until temperature falls to +120°C, then automatically resumes operation. This hysteresis prevents rapid cycling; sustained overload will result in intermittent on/off behavior until thermal equilibrium or load reduction occurs.
PAM2304BKFADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
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PAM2304BKFADJ FAQ
1.How can I place an order for PAM2304BKFADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2304BKFADJ 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 PAM2304BKFADJ reliable?
The price and inventory of PAM2304BKFADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2304BKFADJ is usually 5 days.
3.What payment methods are accepted for PAM2304BKFADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2304BKFADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2304BKFADJ?
PAM2304BKFADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2304BKFADJ 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 PAM2304BKFADJ?
For technical support, including PAM2304BKFADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2304BKFADJ requirements.
6.How does Aetrix verify that PAM2304BKFADJ is sourced from the original manufacturer or authorized distributors?
All PAM2304BKFADJ 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 PAM2304BKFADJ meets industry standards.
7.What is the process for return or replacement of PAM2304BKFADJ?
All PAM2304BKFADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2304BKFADJ, 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 PAM2304BKFADJ part is unused and in its original packaging.
Return procedure for PAM2304BKFADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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