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Diodes Incorporated PAM2305CGF280
- Part No.:
- PAM2305CGF280
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
PAM2305CGF280.pdf
- Description:
- IC REG BUCK 2.8V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,198
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Product details
Overview
PAM2305CGF280 from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with fixed 2.8V output, operating from 2.5V–5.5V input and delivering up to 96% efficiency at 1.5MHz switching frequency. It integrates high- and low-side MOSFETs, features pulse-skipping modulation (PSM) for ultra-low 40µA quiescent current in light-load portable applications, and includes under-voltage lockout, thermal shutdown, and short-circuit protection. Used in battery-powered wireless devices requiring compact, efficient voltage regulation.
For engineers reviewing the PAM2305CGF280 datasheet, PAM2305CGF280 pinout, PAM2305CGF280 application, or PAM2305CGF280 equivalent, this page delivers verified electrical parameters, package-specific thermal limits, EN-controlled enable logic, FB reference voltage accuracy (±2%), and real-world ripple/efficiency trade-offs across input voltage and load conditions.
Technical Context
The PAM2305CGF280 employs current-mode PWM control with internal 0.6V feedback reference and 1.5MHz oscillator, enabling fast transient response and stable regulation across 2.5V–5.5V input range. Its synchronous rectification eliminates external diode loss, while PSM mode dynamically reduces switching frequency below 10mA load to maintain high light-load efficiency.
Thermal management relies on junction-to-ambient thermal resistance of 68°C/W (DFN2x2-6 package), limiting continuous 1A output to ambient ≤65°C without heatsinking. Over-temperature protection triggers at 150°C with 30°C hysteresis, and UVLO disables operation below ~2.3V 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-Po cell, USB, or dual alkaline/NiMH sources without external LDO pre-regulation. |
| Output Voltage | Fixed 2.8V ±3% - set internally; eliminates external feedback resistors and saves PCB space in cost-sensitive designs. |
| Max Output Current | 1A continuous - limited by DFN2x2-6 package thermal resistance (68°C/W); requires ≥25mm² copper pour for full-load operation at 25°C ambient. |
| Quiescent Current | 40µA typical - enables >1000-hour standby in coin-cell–powered IoT sensors without compromising wake-up responsiveness. |
| Switching Frequency | 1.5MHz nominal - allows use of small 2.2µH inductors and 10µF ceramic capacitors, reducing solution footprint to <15mm². |
| Feedback Reference | 0.6V ±2% - sets output accuracy; enables precise 2.8V rail for 2.8V I/O domains in microcontrollers and RF transceivers. |
| Shutdown Current | <0.1µA - disconnects VIN from VOUT during EN=LOW, preventing battery drain in powered-off states. |
Pinout & Package
Package: DFN2x2-6L (2.0mm × 2.0mm, 0.5mm pitch, exposed thermal pad). Compact footprint ideal for space-constrained portable PCBs; thermal pad must be soldered to ≥25mm² internal ground plane for rated 1A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 2.5–5.5V; connects to input capacitor (10µF ceramic) placed within 2mm to minimize switching noise coupling. |
| GND | Power and signal ground | Common return for VIN, VOUT, and SW; must tie directly to thermal pad and adjacent ground plane to reduce EMI and improve thermal conduction. |
| EN | Enable control input | Active-high logic: ≥1.5V enables regulator; ≤0.3V forces shutdown with <0.1µA supply current; no pull-up required. |
| VOUT/FB | Output voltage sense / feedback | Internally tied to 2.8V output; no external resistor divider needed - simplifies layout and eliminates resistor tolerance error. |
| SW | Switch node | Drain connection of internal high- and low-side MOSFETs; routes high di/dt current - must be short, wide, and isolated from sensitive analog traces. |
| NC | No connection | Pin 1 is unconnected; must remain floating or grounded per layout guidelines - no functional role or internal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and enabling >90% efficiency down to 10mA load. |
| Pulse-skipping modulation (PSM) | Reduces switching frequency under light load, maintaining 85%+ efficiency at 100µA output while holding 2.8V regulation. |
| Internal soft-start | Gradually ramps switch current limit to 1.5A over ~1ms, preventing inrush-induced input voltage sag and output overshoot. |
| Cycle-by-cycle current limiting | Clamps peak inductor current to 1.5A typical, enabling robust short-circuit recovery without latch-off or external current sense. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and re-enables only after cooling to 120°C - prevents thermal oscillation during overload. |
Applications
| Wireless Headset Power Rail | Bluetooth LE Sensor Node |
|---|---|
|
Use Scenario: Powers Bluetooth audio codec and RF section in compact mono/stereo headsets using single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Primary 2.8V system rail regulator; supplies digital baseband and analog audio circuitry with low-noise, tightly regulated output. Use Value: 40µA quiescent current extends talk time by >15% versus non-PSM buck converters; 1.5MHz switching avoids interference with 2.4GHz ISM band. |
Use Scenario: Powers ultra-low-power BLE SoC (e.g., nRF52832) and environmental sensor in coin-cell–operated asset tracker. IC Role / Device Role / Timing Role: Main system regulator delivering 2.8V to MCU core and radio; enters PSM mode during 99% sleep duty cycle. Use Value: Maintains 2.8V accuracy across 2.7–4.2V battery range; shutdown current <0.1µA enables >5-year shelf life on CR2032. |
| USB-Powered Portable Display | Industrial Handheld Scanner |
|
Use Scenario: Regulates 5V USB input to stable 2.8V for OLED display driver IC and touch controller in pocket-sized displays. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator; handles dynamic load steps from display refresh and touch polling. Use Value: 96% peak efficiency minimizes heat buildup in sealed plastic enclosure; 1.5MHz operation allows tiny 2.2µH inductor and 0805 capacitors. |
Use Scenario: Supplies 2.8V to image sensor, laser diode driver, and decode ASIC in ruggedized barcode scanner powered by 3.6V NiMH pack. IC Role / Device Role / Timing Role: Robust main power stage with UVLO and thermal shutdown; sustains 1A pulsed loads during scan bursts. Use Value: Under-voltage lockout prevents erratic operation below 2.3V; thermal shutdown protects against sustained 1A load in high-ambient environments. |
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 |
|---|---|---|---|
| TPS62231DRYR | Fixed 2.8V, 1A, 3MHz switching, 18µA IQ - higher frequency enables smaller passives but increases EMI sensitivity. | Requires tighter layout control for EMI; better suited for space-constrained designs where 3MHz noise can be filtered. | Select when board area is critical and input is stable 3.3–5.5V; avoid if input dips below 2.7V due to tighter UVLO (2.5V). |
| RT8059GJ6 | Adjustable 0.6–5.5V output, 1A, 1.5MHz, 55µA IQ - lacks fixed 2.8V option; needs external feedback resistors. | Offers flexibility for multi-rail systems but adds BOM cost and layout complexity vs. PAM2305CGF280's pin-strapped simplicity. | Choose when future voltage variants (e.g., 3.3V, 1.8V) may be needed on same PCB; not optimal for pure 2.8V production. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2305CGF280 provides lowest system cost for dedicated 2.8V rails via zero-resistor feedback, best-in-class 40µA IQ for long battery life, and proven thermal resilience in DFN2x2-6 at 1A - making it optimal for high-volume portable consumer electronics.
Availability
PAM2305CGF280 is available at Aetrix Electronics and suitable for wireless headsets, BLE sensor nodes, USB-powered displays, and industrial handheld scanners requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for PAM2305CGF280 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-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The PAM2305 belongs to Diodes' high-density DC-DC converter product line, designed specifically for space- and battery-life–constrained portable electronics requiring integrated synchronous regulation with minimal external components.
FAQ
What input voltage range does the PAM2305CGF280 support, and how does UVLO affect operation?
The PAM2305CGF280 operates from 2.5V to 5.5V input. Its under-voltage lockout (UVLO) activates below approximately 2.3V, disabling the regulator to prevent unstable operation and deep battery discharge. The device resumes regulation only after VIN rises above the UVLO threshold plus hysteresis (~2.5V), ensuring clean startup and protecting primary cells.
Can the PAM2305CGF280 deliver full 1A output continuously in the DFN2x2-6 package?
Yes, but thermal design is critical: at 25°C ambient, the DFN2x2-6 package (θJA = 68°C/W) allows ~1.47W dissipation, supporting 1A output with ≤2.8V dropout (e.g., VIN = 4.2V → 1.4V drop → 1.96W loss exceeds rating). For reliable 1A operation, limit VIN to ≤3.6V or add ≥25mm² copper pour under the thermal pad to maintain junction temperature below 125°C.
How does the PAM2305CGF280 manage light-load efficiency, and what is its minimum operating current?
The PAM2305CGF280 uses pulse-skipping modulation (PSM) to reduce switching frequency under light load, maintaining >85% efficiency down to 100µA output. It has no minimum load requirement - regulation holds from 0mA to 1A, with quiescent current remaining at 40µA typical regardless of load, enabling true zero-load standby in always-on sensor nodes.
Is an external feedback resistor network required for the PAM2305CGF280's 2.8V output?
No. The PAM2305CGF280 is a fixed-output variant: its internal feedback divider is factory-trimmed for 2.8V ±3%, so VOUT/FB is directly connected to the output node with no external resistors. This eliminates resistor tolerance errors, saves PCB area, reduces BOM count, and improves long-term stability versus adjustable counterparts requiring precision external dividers.
PAM2305CGF280 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- 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)
PAM2305CGF280 FAQ
1.How can I place an order for PAM2305CGF280 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305CGF280 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 PAM2305CGF280 reliable?
The price and inventory of PAM2305CGF280 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305CGF280 is usually 5 days.
3.What payment methods are accepted for PAM2305CGF280?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305CGF280 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305CGF280?
PAM2305CGF280 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305CGF280 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 PAM2305CGF280?
For technical support, including PAM2305CGF280 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305CGF280 requirements.
6.How does Aetrix verify that PAM2305CGF280 is sourced from the original manufacturer or authorized distributors?
All PAM2305CGF280 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 PAM2305CGF280 meets industry standards.
7.What is the process for return or replacement of PAM2305CGF280?
All PAM2305CGF280 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305CGF280, 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 PAM2305CGF280 part is unused and in its original packaging.
Return procedure for PAM2305CGF280:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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