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Diodes Incorporated PAM2305DGFADJ
- Part No.:
- PAM2305DGFADJ
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
PAM2305DGFADJ.pdf
- Description:
- IC REG BUCK ADJ 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,264
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Product details
Overview
PAM2305DGFADJ from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with adjustable output (0.6V–VIN), 1.5MHz fixed-frequency PWM/PSM hybrid control, internal MOSFETs, and 40μA quiescent current. It operates from 2.5V–5.5V input-compatible with single Li+/Li-polymer or USB sources-and delivers high efficiency (up to 96%) in portable power rails for microcontrollers and RF modules.
For engineers reviewing the PAM2305DGFADJ datasheet, PAM2305DGFADJ pinout, PAM2305DGFADJ application, or PAM2305DGFADJ equivalent, key selection criteria include its DFN2x2-6 package thermal performance (θJA = 68°C/W), 0.6V feedback reference accuracy (±2%), shutdown current (<0.1μA), and integrated short-circuit/thermal protection.
Technical Context
The PAM2305DGFADJ uses current-mode control with constant-frequency PWM at full load and automatic pulse-skipping modulation (PSM) under light load to maintain regulation while minimizing IQ. Its internal synchronous rectifier eliminates external diode losses, and the 0.6V reference enables precise output setting via external resistor divider.
It integrates over-temperature protection (trip at 150°C, hysteresis 30°C), cycle-by-cycle peak current limiting (1.5A typical), and under-voltage lockout (UVLO) to prevent deep battery discharge. The soft-start circuit ramps switch current in discrete steps to limit inrush and suppress output overshoot during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1A continuous; limited by DFN2x2-6 package thermal dissipation (980mW max @ TA=25°C) |
| Input Voltage Range | 2.5V–5.5V; supports single-cell Li+/Li-Po, alkaline/NiMH stacks, and USB 5V sources |
| Feedback Reference | 0.6V ±2% (typ); sets output voltage as VO = 0.6 × (1 + R1/R2) |
| Switching Frequency | 1.5MHz (typ); enables compact 2.2–4.7μH inductor and low-profile ceramic capacitors |
| Quiescent Current | 40μA (typ); extends battery runtime in standby mode of portable devices |
| Shutdown Current | <0.1μA; isolates input from output to prevent battery drain during system sleep |
| Efficiency | Up to 96%; achieved via synchronous rectification and low RDS(ON) P/N-MOSFETs (0.3–0.5Ω) |
Pinout & Package
Package: DFN2x2-6 (Pb-free, wettable flank, 0.5mm pitch, 1.9×1.9mm exposed pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Connects to 2.5–5.5V source; requires local 10μF ceramic capacitor with low ESR |
| GND | Power ground | Common return path for VIN, SW, FB; must be tied directly to exposed thermal pad |
| EN | Enable control input | Active-high logic: ≥1.5V enables regulator; ≤0.3V disables with <0.1μA leakage |
| FB | Feedback node | Senses output voltage divider; internal error amplifier compares to 0.6V reference |
| SW | Switch node | Drain connection of internal P- and N-channel MOSFETs; drives external inductor |
| NC | No connection | Pin 1 is unconnected; must not be soldered or biased |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and improving efficiency above 30% load |
| PWM/PSM hybrid mode | Auto-switches between fixed-frequency PWM (heavy load) and pulse-skipping (light load) to optimize IQ vs. ripple trade-off |
| Integrated protection | Includes cycle-by-cycle current limit (1.5A), thermal shutdown (150°C), UVLO, and short-circuit foldback (400kHz min freq) |
| Soft-start | Digital ramp limits inrush current and prevents input droop/output overshoot during power-up |
| Thermal-enhanced DFN | DFN2x2-6 package with exposed pad achieves θJA = 68°C/W-enabling 1A operation without heatsink on 2-layer PCB |
Applications
| Wireless Headset Power Rail | USB-C Portable Monitor Logic Supply |
|---|---|
|
Use Scenario: Powers Bluetooth SoC and audio codec in battery-operated wireless headset requiring stable 1.8V rail. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 1.8V from 3.7V Li-Po cell; manages dynamic load transients during audio streaming. Use Value: 96% efficiency and 40μA IQ extend playback time; PSM mode maintains regulation during voice-inactive gaps without sacrificing noise performance. |
Use Scenario: Generates 3.3V logic supply for display controller and USB-C PD interface in compact portable monitor. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 5V USB-C VBUS to clean 3.3V; handles burst loads from LCD driver ICs. Use Value: 1.5MHz switching allows use of 2.2μH inductor and 10μF X7R ceramics-minimizing board area while meeting EMI Class B limits. |
| Digital Camera Sensor Bias | Smart Wearable MCU Core Supply |
|
Use Scenario: Supplies adjustable 1.2V bias to CMOS image sensor in ultra-thin digital camera module. IC Role / Device Role / Timing Role: Adjustable buck converter configured via precision resistor divider; regulates sensor analog core voltage independent of battery sag. Use Value: 0.6V reference tolerance (±2%) ensures <±3% output accuracy across temperature; DFN2x2-6 footprint fits tight optical module layout. |
Use Scenario: Provides 0.9V core voltage to ARM Cortex-M4 MCU in fitness tracker with multi-day battery life. IC Role / Device Role / Timing Role: High-efficiency buck supplying processor core; dynamically adjusts frequency and duty cycle during sleep/wake transitions. Use Value: Shutdown current <0.1μA eliminates parasitic drain during deep-sleep modes; EN pin enables firmware-controlled power gating. |
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 |
|---|---|---|---|
| MP2158GQZ-P | Higher 2MHz switching frequency; lower 25μA IQ but no PSM mode; requires external compensation | Better suited for space-constrained designs needing smaller inductors; less optimal for ultra-low-IQ battery standby | Select when PCB area is critical and light-load efficiency is secondary to transient response |
| TPS62231DRVR | Fixed 1.8V/3.3V options only; 17μA IQ; integrated soft-start but no thermal shutdown hysteresis spec | Limited to preset outputs; lacks adjustable feedback and robust OTP recovery behavior | Choose only if fixed output suffices and thermal margin analysis confirms safe operation without hysteresis |
Compared with MP2158GQZ-P and TPS62231DRVR, the PAM2305DGFADJ uniquely balances adjustable output, ultra-low shutdown current, integrated PSM/PWM hybrid control, and explicit thermal hysteresis-making it optimal for cost-sensitive, battery-powered systems requiring design flexibility and long shelf life.
Availability
PAM2305DGFADJ is available at Aetrix Electronics and suitable for portable electronics, wireless headsets, and smart wearables requiring stable component supply, consistent DFN2x2-6 packaging, and guaranteed lifecycle continuity through 2028.
Supply support for PAM2305DGFADJ 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 PAM2305D belongs to Diodes' high-efficiency DC-DC converter product line, designed specifically for battery-powered portable devices where small size, low IQ, and thermal robustness are essential.
FAQ
What is the maximum output current supported by the PAM2305DGFADJ in DFN2x2-6 package?
The DFN2x2-6 package supports up to 1A continuous output current under typical conditions (TA = 25°C, 2-layer PCB, no forced airflow). This limit is thermally constrained: maximum power dissipation is 980mW, corresponding to ~1A at 1.8V output with 2.5V input. Derating is required above 60°C ambient or with poor copper pour.
How does the PAM2305DGFADJ handle light-load efficiency optimization?
The device automatically enters Pulse-Skipping Modulation (PSM) mode below ~100mA load, reducing switching frequency and gate drive activity to achieve 40μA quiescent current. Unlike burst-mode regulators, PSM maintains output voltage regulation without audible noise or large output ripple, making it suitable for sensitive analog circuits.
Can the PAM2305DGFADJ be used with ceramic output capacitors?
Yes-ceramic capacitors are strongly recommended. The datasheet specifies 10μF X5R/X7R ceramics for both input and output. Their low ESR minimizes output ripple (ΔVOUT ≈ ESR × ΔIL) and improves transient response. Avoid Y5V/Z5U dielectrics due to voltage/temperature coefficient drift affecting regulation accuracy.
What is the function of the NC pin in the DFN2x2-6 package?
Pin 1 is designated NC (No Connection) and must remain unconnected-neither tied to GND nor left floating. It is electrically isolated from internal circuitry. Soldering or biasing this pin may cause mechanical stress on the die or alter thermal path integrity, potentially degrading reliability or thermal performance.
PAM2305DGFADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
PAM2305DGFADJ FAQ
1.How can I place an order for PAM2305DGFADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305DGFADJ 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 PAM2305DGFADJ reliable?
The price and inventory of PAM2305DGFADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305DGFADJ is usually 5 days.
3.What payment methods are accepted for PAM2305DGFADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305DGFADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305DGFADJ?
PAM2305DGFADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305DGFADJ 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 PAM2305DGFADJ?
For technical support, including PAM2305DGFADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305DGFADJ requirements.
6.How does Aetrix verify that PAM2305DGFADJ is sourced from the original manufacturer or authorized distributors?
All PAM2305DGFADJ 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 PAM2305DGFADJ meets industry standards.
7.What is the process for return or replacement of PAM2305DGFADJ?
All PAM2305DGFADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305DGFADJ, 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 PAM2305DGFADJ part is unused and in its original packaging.
Return procedure for PAM2305DGFADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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