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Diodes Incorporated PAM2305CGF250
- Part No.:
- PAM2305CGF250
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
PAM2305CGF250.pdf
- Description:
- IC REG BUCK 2.5V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,294
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Product details
Overview
PAM2305CGF250 from Diodes Incorporated is a 1A synchronous step-down DC-DC converter in DFN2x2-6 package, delivering adjustable or fixed 2.5V output with 0.6V internal reference, 1.5MHz switching frequency, and 40µA quiescent current. It integrates high- and low-side MOSFETs, supports 2.5–5.5V input (single Li+/USB/alkaline), and features PSM mode for battery longevity in portable electronics.
For engineers reviewing the PAM2305CGF250 datasheet, PAM2305CGF250 pinout, PAM2305CGF250 application, or PAM2305CGF250 equivalent, key selection criteria include its 2.5V fixed output configuration, DFN2x2-6 thermal performance (θJA = 68°C/W), 96% peak efficiency, UVLO threshold at 2.5V, and soft-start behavior limiting in-rush current during power-up.
Technical Context
The PAM2305CGF250 employs current-mode PWM control with pulse-skipping modulation (PSM) to maintain regulation under light loads while minimizing quiescent current. Its internal 0.6V reference feeds an error amplifier that compares FB voltage against this threshold to adjust duty cycle via a 1.5MHz oscillator.
It integrates complementary P- and N-channel MOSFETs with RDS(ON) of 0.45Ω (P-ch) and 0.5Ω (N-ch), enabling synchronous rectification and eliminating external diode losses. Thermal shutdown activates at 150°C with 30°C hysteresis, and under-voltage lockout prevents operation below VIN = 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li+/Li-Po, USB 5V, or two alkaline/NiMH cells without external LDO pre-regulation. |
| Output Voltage | Fixed 2.5V - set internally; eliminates need for external feedback resistors and reduces BOM count in space-constrained designs. |
| Max Output Current | 1A continuous - limited by DFN2x2-6 package thermal resistance (θJA = 68°C/W) and internal power dissipation (980mW max at TA = 25°C). |
| Switching Frequency | 1.5MHz (typ) - enables use of small 2.2µH inductors and ceramic capacitors, reducing solution footprint and EMI filtering complexity. |
| Quiescent Current | 40µA (typ) - extends battery runtime in always-on or low-duty-cycle portable devices such as wireless sensors and remote controls. |
| Efficiency | Up to 96% - achieved via synchronous rectification and low RDS(ON) MOSFETs, minimizing conduction losses across load range. |
| Shutdown Current | <0.1µA - ensures near-zero battery drain when EN pin is pulled low, critical for long-term storage or standby modes. |
Pinout & Package
Package: DFN2x2-6 (2.0mm × 2.0mm, 0.5mm pitch, exposed thermal pad). Compact footprint optimized for high-density portable PCB layouts with enhanced thermal performance over TSOT25.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 2.5–5.5V supply; connects directly to input capacitor to minimize high-frequency ripple and switching noise coupling. |
| GND | Ground reference | Common return path for power and signal; must be connected to exposed thermal pad for optimal heat dissipation and noise immunity. |
| EN | Enable control input | Logic-level enable: >1.5V enables regulator; <0.3V disables it with sub-0.1µA shutdown current-ideal for host MCU-controlled power sequencing. |
| VOUT/FB | Output voltage sense / feedback | Internally tied to 2.5V output divider; no external resistor required-simplifies layout and improves accuracy vs. discrete feedback networks. |
| SW | Switch node | Drain connection of internal high- and low-side MOSFETs; requires tight layout with minimal trace length to reduce EMI and switching losses. |
| NC | No connection | Pin 1 is unconnected; must remain floating-no tie-to-ground or pull-up required per datasheet specification. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P- and N-channel MOSFETs eliminate external Schottky diode, reducing conduction loss and improving efficiency above 30% load. |
| Pulse-skipping modulation (PSM) | Reduces switching frequency under light load to maintain regulation while holding IQ at 40µA-critical for battery-powered standby operation. |
| Internal soft-start | Digital ramp limits in-rush current during startup, preventing input rail collapse and eliminating output overshoot without external RC network. |
| Over-temperature protection | Thermal shutdown at 150°C with 30°C hysteresis ensures safe recovery after transient overload or poor heatsinking conditions. |
| Short-circuit protection | Cycle-by-cycle peak current limit (1.5A typ) forces 400kHz operation at minimum duty cycle during fault, limiting average input current to ~200mA. |
Applications
| Wireless Headset Power Supply | Digital Camera Core Voltage Rail |
|---|---|
|
Use Scenario: Dual-mode Bluetooth headset requiring stable 2.5V for audio codec and RF transceiver while operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic and analog blocks; regulates against battery voltage sag during transmit bursts. Use Value: 96% efficiency and 40µA quiescent current extend talk time by >18% versus legacy asynchronous converters; DFN2x2-6 footprint fits within 8mm × 8mm PCB area. |
Use Scenario: Low-power digital camera module powering image sensor interface and ISP core logic from shared 3.7V battery rail. IC Role / Device Role / Timing Role: Fixed-output point-of-load regulator delivering clean 2.5V to noise-sensitive analog front-end and digital processing unit. Use Value: 1.5MHz switching enables compact 2.2µH inductor and 10µF X5R ceramic caps, reducing total solution size by 35% vs. 500kHz alternatives. |
| Portable Medical Glucometer | Smart Remote Control MCU Rail |
|
Use Scenario: Battery-operated glucometer needing precise 2.5V for ADC reference and microcontroller core, with multi-year shelf life requirement. IC Role / Device Role / Timing Role: Main system regulator with UVLO and thermal protection ensuring safe operation during intermittent high-current strip-read cycles. Use Value: Sub-0.1µA shutdown current preserves battery charge during 5-year storage; ±3% output accuracy meets ISO 15197 glucose measurement tolerance. |
Use Scenario: IR/Bluetooth smart remote using ARM Cortex-M0+ MCU requiring regulated 2.5V from two AA alkaline cells (2.0–3.2V range). IC Role / Device Role / Timing Role: Input-range-optimized buck converter maintaining regulation down to 2.5V VIN-enabling full battery utilization before cutoff. Use Value: UVLO at 2.5V prevents brownout resets; EN pin allows MCU to gate power to peripherals, cutting system idle current to <1µA. |
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 2.5V output, 1.8MHz switching, 25µA IQ, but only 0.6A max output and WSON-6 (2x2mm) package with higher θJA (105°C/W). | Limited to lower-current applications; lacks PSM mode-uses forced PWM at light load, increasing idle power. | Select when ultra-low IQ dominates over output current capability and thermal margin is less constrained. |
| RT8059GJ6 | Adjustable output (0.6–5.5V), 1.5A rating, 30µA IQ, QFN2x2-6 package, but requires external feedback resistors and has no integrated soft-start. | Requires additional BOM components and layout effort; better suited for multi-voltage designs than fixed-rail systems. | Prefer when design flexibility across multiple output voltages justifies added component count and tuning overhead. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2305CGF250 uniquely combines fixed 2.5V output, 1A capability, 40µA IQ with PSM, and DFN2x2-6 thermal performance-making it optimal for cost-sensitive, space-constrained portable devices where output voltage is invariant.
Availability
PAM2305CGF250 is available at Aetrix Electronics and suitable for wireless headsets, portable medical devices, smart remotes, and digital camera modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for PAM2305CGF250 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 ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM2305 belongs to Diodes' high-efficiency DC-DC converter product line, engineered specifically for battery-powered portable electronics demanding compact size, low quiescent current, and robust thermal performance in DFN and TSOT packages.
FAQ
What is the maximum recommended output current for PAM2305CGF250 in DFN2x2-6 package?
The maximum continuous output current is 1A, constrained by thermal limits of the DFN2x2-6 package (θJA = 68°C/W). At TA = 25°C, maximum power dissipation is 980mW; exceeding 1A under high VIN or poor PCB copper area risks thermal shutdown activation at 150°C junction temperature.
Does PAM2305CGF250 require external feedback resistors for 2.5V output?
No. The PAM2305CGF250 is factory-configured for fixed 2.5V output; the VOUT/FB pin is internally connected to a precision resistive divider referenced to the 0.6V internal bandgap. External resistors are unnecessary and must not be added-doing so would disrupt regulation accuracy and stability.
How does the enable (EN) pin behave during power sequencing?
The EN pin is active-high with 1.5V threshold (typ) and 0.3V release level (typ). When pulled below 0.3V, the device enters shutdown with <0.1µA input current and disconnects VIN from VOUT. No external pull-down is required-floating EN defaults to disable due to internal weak pull-down.
Can PAM2305CGF250 operate with input voltage below 2.5V?
No. The under-voltage lockout (UVLO) circuit disables operation when VIN falls below approximately 2.5V. This prevents unstable regulation and potential damage from insufficient gate drive to internal MOSFETs. Operation resumes only after VIN exceeds the UVLO rising threshold with hysteresis.
PAM2305CGF250 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):
- 2.5V
- 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)
PAM2305CGF250 FAQ
1.How can I place an order for PAM2305CGF250 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305CGF250 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 PAM2305CGF250 reliable?
The price and inventory of PAM2305CGF250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305CGF250 is usually 5 days.
3.What payment methods are accepted for PAM2305CGF250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305CGF250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305CGF250?
PAM2305CGF250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305CGF250 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 PAM2305CGF250?
For technical support, including PAM2305CGF250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305CGF250 requirements.
6.How does Aetrix verify that PAM2305CGF250 is sourced from the original manufacturer or authorized distributors?
All PAM2305CGF250 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 PAM2305CGF250 meets industry standards.
7.What is the process for return or replacement of PAM2305CGF250?
All PAM2305CGF250 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305CGF250, 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 PAM2305CGF250 part is unused and in its original packaging.
Return procedure for PAM2305CGF250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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