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Diodes Incorporated PAM2305CGF330
- Part No.:
- PAM2305CGF330
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
PAM2305CGF330.pdf
- Description:
- IC REG BUCK 3.3V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,179
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Product details
Overview
PAM2305CGF330 from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with fixed 3.3V output, operating from 2.5V–5.5V input, delivering up to 96% efficiency at 1.5MHz switching frequency, featuring pulse-skipping modulation for <40µA quiescent current in light-load portable applications such as wireless handsets and battery-powered peripherals.
For engineers reviewing the PAM2305CGF330 datasheet, PAM2305CGF330 pinout, PAM2305CGF330 application, or PAM2305CGF330 equivalent, key selection criteria include its DFN2x2-6 package thermal resistance (θJA = 68°C/W), 0.6V feedback reference, internal PMOS/NMOS synchronous rectifier, and UVLO/thermal shutdown protection-critical for compact, battery-sensitive power rail design.
Technical Context
The PAM2305CGF330 implements current-mode PWM control with 1.5MHz fixed-frequency operation under heavy load and automatic transition to pulse-skipping mode under light load to minimize quiescent current. Its internal 0.6V reference enables precise output regulation via external resistor divider or factory-set 3.3V output.
It integrates both high-side PMOS and low-side NMOS power switches with RDS(ON) of 0.45Ω (P) and 0.5Ω (N), supports 100% duty-cycle dropout operation, and includes cycle-by-cycle peak current limiting (1.5A typical), soft-start, and thermal shutdown triggered at 150°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single Li+/Li-Po cell, USB, or multi-cell alkaline/NiMH sources. |
| Output Voltage | Fixed 3.3V - eliminates external feedback resistors; ±3% accuracy over load/temperature. |
| Max Output Current | 1A continuous - limited by DFN2x2-6 package thermal dissipation (980mW max at TA=25°C). |
| Switching Frequency | 1.5MHz (typ) - enables use of small 2.2µH inductors and ceramic capacitors for compact layout. |
| Quiescent Current | 40µA (typ) - extends battery life in standby mode via pulse-skipping modulation (PSM). |
| Feedback Reference | 0.6V - sets output voltage via VOUT = 0.6V × (1 + R1/R2); used internally for error amplifier comparison. |
| Shutdown Current | <0.1µA - disconnects input from output during EN pin low, preserving battery charge. |
Pinout & Package
Package: DFN2x2-6 (2.0mm × 2.0mm, 0.5mm pitch, exposed thermal pad). Thermal resistance θJA = 68°C/W enables higher power delivery than TSOT25 in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power supply input | Accepts 2.5–5.5V; connects to input capacitor (10µF ceramic) near pin for low-impedance AC path. |
| GND | Ground reference | Common return for power, feedback, and enable; must be tied directly to exposed thermal pad for thermal performance. |
| EN | Enable control input | Active-high logic: >1.5V enables regulator; <0.3V forces shutdown with <0.1µA supply current. |
| VOUT/FB | Output voltage sense / feedback | Internally connected to 0.6V reference comparator; for fixed-3.3V version, this pin is internally tied to output. |
| SW | Switch node | Drain connection of internal PMOS/NMOS switches; drives external inductor; requires tight layout to minimize EMI. |
| NC | No connection | Pin 1 (DFN2x2-6) is unconnected; must not be soldered or biased. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated PMOS high-side and NMOS low-side switches eliminate external diode, enabling >96% efficiency and reduced heat generation. |
| Pulse-skipping modulation (PSM) | Reduces quiescent current to 40µA typ at light load, extending runtime in always-on portable devices without compromising transient response. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and resumes at 120°C, preventing thermal runaway while allowing safe recovery without external reset. |
| Under-voltage lockout (UVLO) | Prevents startup until VIN exceeds threshold (~2.3V), avoiding unstable operation during battery discharge and protecting downstream circuitry. |
| Soft-start | Digitally ramps switch current in steps to limit inrush, eliminating input voltage sag and output overshoot during power-up. |
Applications
| Wireless Handset Power Rail | USB-Powered Peripheral |
|---|---|
|
Use Scenario: Powering baseband processor and RF transceiver in compact 3G/4G handset designs with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator, delivering stable voltage during burst transmit/receive cycles. Use Value: 1.5MHz switching allows 2.2µH inductor and 10µF ceramic caps, reducing solution size by >40% vs. lower-frequency alternatives. |
Use Scenario: Regulating 5V USB input to clean 3.3V for microcontroller, sensors, and BLE radio in portable diagnostic tool. IC Role / Device Role / Timing Role: Input-conditioned buck converter with UVLO and thermal protection for unregulated bus-powered operation. Use Value: 40µA quiescent current ensures >100-hour standby on USB-harvested energy; shutdown current <0.1µA preserves host port compliance. |
| Digital Camera Sensor Supply | Portable Medical Monitor |
|
Use Scenario: Providing low-noise 3.3V bias to CMOS image sensor and ADC in battery-operated digital frame/camera. IC Role / Device Role / Timing Role: High-efficiency, low-ripple power stage with synchronous rectification and ceramic-cap optimized output filter. Use Value: 96% peak efficiency minimizes self-heating near optics; 0.6V reference enables tight regulation (<±3%) across battery discharge curve. |
Use Scenario: Generating patient-monitoring system's 3.3V logic rail from dual AA alkaline cells (2.4–3.2V) or Li-polymer backup. IC Role / Device Role / Timing Role: Wide-input buck converter supporting 2.5–5.5V with dropout capability and robust short-circuit protection. Use Value: 100% duty-cycle operation maintains 3.3V output even as input drops to 3.3V+RDS(ON)×ILOAD, ensuring uninterrupted display and data logging. |
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 | 1.8V–6.5V input, 3.3V fixed, 1.2MHz, 35µA IQ, WSON-6 (2×2mm) - slightly wider VIN range but no PSM mode. | Lacks pulse-skipping; less optimal for ultra-low-power sleep states in battery-gauged systems. | Prefer when input may exceed 5.5V or when deterministic 1.2MHz frequency is required for EMI filtering. |
| RT8059GJ6 | 2.5V–5.5V input, 3.3V fixed, 1.5MHz, 45µA IQ, DFN2x2-6 - identical package and pinout, but lacks thermal shutdown hysteresis (150°C only). | No thermal recovery hysteresis; requires external thermal management in sustained 1A loads. | Choose only if board-level thermal monitoring exists; otherwise PAM2305CGF330 provides safer autonomous thermal protection. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2305CGF330 uniquely combines PSM-enabled ultra-low IQ, integrated thermal hysteresis, and DFN2x2-6 package efficiency (68°C/W θJA), making it optimal for space- and battery-limited portable designs requiring autonomous reliability.
Availability
PAM2305CGF330 is available at Aetrix Electronics and suitable for wireless handsets, USB-powered peripherals, and portable medical monitors requiring stable component supply, consistent DFN2x2-6 packaging, and guaranteed long-term production support.
Supply support for PAM2305CGF330 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' PAM series of compact, high-frequency DC-DC converters designed specifically for portable electronics where board space, battery life, and thermal performance are critical constraints.
FAQ
What is the maximum continuous output current for PAM2305CGF330 in DFN2x2-6 package?
The DFN2x2-6 package supports up to 1A continuous output current under ambient conditions ≤25°C with adequate PCB copper area (≥100mm² thermal pad exposure). At higher temperatures or with minimal copper, derating applies per θJA = 68°C/W; for example, at TA = 60°C, max continuous current drops to ~750mA to maintain TJ ≤125°C.
Does PAM2305CGF330 require external feedback resistors for 3.3V output?
No. The "330" suffix indicates factory-trimmed fixed 3.3V output; internal resistor divider sets VOUT = 3.3V with ±3% accuracy. The VOUT/FB pin is internally connected to the output node, eliminating need for external resistors and saving PCB area and BOM cost.
How does the PAM2305CGF330 behave during input voltage dropout near 3.3V?
When VIN approaches VOUT, the device enters 100% duty-cycle mode: the PMOS switch remains fully on, and output becomes VIN minus ILOAD × RDS(ON). With RDS(ON) ≈ 0.45Ω and 1A load, VOUT drops ~0.45V below VIN - enabling usable operation down to ~3.75V input for full 3.3V output.
Can PAM2305CGF330 be used with ceramic input and output capacitors?
Yes - it is optimized for ceramic capacitors. Use X5R or X7R dielectric types: 10µF input (low-ESR, rated ≥6.3V), 10µF output (rated ≥6.3V), and 2.2µH shielded inductor. Ceramic caps reduce size, improve ripple suppression (ΔVOUT ∝ ESR), and avoid electrolytic aging issues in portable applications.
PAM2305CGF330 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):
- 3.3V
- 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)
PAM2305CGF330 FAQ
1.How can I place an order for PAM2305CGF330 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305CGF330 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 PAM2305CGF330 reliable?
The price and inventory of PAM2305CGF330 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305CGF330 is usually 5 days.
3.What payment methods are accepted for PAM2305CGF330?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305CGF330 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305CGF330?
PAM2305CGF330 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305CGF330 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 PAM2305CGF330?
For technical support, including PAM2305CGF330 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305CGF330 requirements.
6.How does Aetrix verify that PAM2305CGF330 is sourced from the original manufacturer or authorized distributors?
All PAM2305CGF330 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 PAM2305CGF330 meets industry standards.
7.What is the process for return or replacement of PAM2305CGF330?
All PAM2305CGF330 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305CGF330, 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 PAM2305CGF330 part is unused and in its original packaging.
Return procedure for PAM2305CGF330:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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