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Diodes Incorporated PAM2305CGF120
- Part No.:
- PAM2305CGF120
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
PAM2305CGF120.pdf
- Description:
- IC REG BUCK 1.2V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,764
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Product details
Overview
PAM2305CGF120 from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with adjustable or fixed 1.2V output, operating from 2.5V–5.5V input, featuring 1.5MHz PWM switching, 40µA quiescent current in PSM mode, and internal power MOSFETs. It targets portable battery-powered systems requiring high efficiency and low-light-load power savings.
For engineers reviewing the PAM2305CGF120 datasheet, PAM2305CGF120 pinout, PAM2305CGF120 application, or PAM2305CGF120 equivalent, key selection criteria include input voltage range compatibility, 1.2V fixed-output accuracy (±3%), thermal limits in DFN2x2-6 package, and enable/shutdown control behavior at EN pin thresholds.
Technical Context
The PAM2305CGF120 uses current-mode PWM control for stable regulation and fast transient response under heavy load, while automatically switching to pulse-skipping modulation (PSM) below ~100mA to reduce quiescent current to 40µA. Its internal synchronous rectifier eliminates external diode losses.
It integrates dual MOSFETs (P-channel high-side, N-channel low-side), a 0.6V reference error amplifier, soft-start circuitry limiting inrush current, and overtemperature protection triggering at 150°C with 30°C hysteresis. UVLO disables operation below VIN = 2.5V.
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 1.2V ±3% - set internally; no external feedback resistors required. |
| Max Output Current | 1A continuous - limited by thermal dissipation in DFN2x2-6 package (980mW max @ TA=25°C). |
| Switching Frequency | 1.5MHz typical - enables use of small 2.2µH inductors and ceramic capacitors for compact layout. |
| Quiescent Current | 40µA typical in PSM mode - extends battery life in standby or light-load states. |
| Shutdown Current | <0.1µA - disconnects input from output; EN pin <0.3V forces full shutdown. |
| Feedback Reference | 0.6V internal - determines output via VOUT = 0.6V × (1 + R1/R2); not used in fixed-1.2V variant. |
Pinout & Package
Supplied in RoHS-compliant DFN2x2-6L package (2.0mm × 2.0mm × 0.75mm, exposed thermal pad), optimized for thermal performance and board space efficiency in portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Main supply connection (2.5–5.5V); requires low-ESR ceramic capacitor placed adjacent to pin. |
| GND | Ground Reference | Common return path for power and feedback; must be tied directly to exposed thermal pad. |
| EN | Enable Control | Active-high logic input; ≥1.5V enables regulator, ≤0.3V disables with <0.1µA shutdown current. |
| VOUT/FB | Output Sense / Feedback | In fixed-output version, internally connected to 1.2V divider; no external resistor needed. |
| SW | Switch Node | Drain connection of internal high-side and low-side MOSFETs; drives external inductor. |
| NC | No Connection | Unused terminal; must remain unconnected and floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated N-channel MOSFET replaces external Schottky diode, enabling >96% peak efficiency and eliminating reverse recovery loss. |
| Thermal Shutdown Protection | Auto-shutdown at TJ = 150°C with 30°C hysteresis ensures safe operation during overload or poor PCB heatsinking. |
| Soft-Start Function | Digital ramp limits inrush current during startup, preventing input rail droop and output overshoot. |
| Short-Circuit Protection | Cycle-by-cycle peak current limit (1.5A typical) reduces average input current to ~200mA during output short. |
| Under-Voltage Lockout (UVLO) | Disables regulator below VIN ≈ 2.5V to prevent deep discharge of Li+ batteries and unstable operation. |
Applications
| Wireless Headsets | Digital Audio Players |
|---|---|
|
Use Scenario: Compact Bluetooth audio device powered by single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 1.2V core supply for DSP and codec ICs. Use Value: 40µA quiescent current extends standby time; 1.5MHz switching allows tiny 2.2µH inductor and 10µF ceramic caps. |
Use Scenario: Portable MP3 player with OLED display and flash memory storage. IC Role / Device Role / Timing Role: Fixed 1.2V rail for ARM Cortex-M0 microcontroller core. Use Value: ±3% output accuracy ensures reliable CPU operation across temperature; DFN2x2-6 footprint saves PCB area. |
| Smart Wearables | USB-Powered Sensors |
|
Use Scenario: Fitness tracker using coin-cell or micro-LiPo battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Always-on 1.2V supply for accelerometer and BLE SoC during sleep mode. Use Value: Pulse-skipping mode maintains ultra-low 40µA IQ, enabling multi-week battery life on 100mAh cell. |
Use Scenario: Industrial sensor node drawing power from USB 5V bus. IC Role / Device Role / Timing Role: Step-down regulator generating stable 1.2V for precision ADC and MCU. Use Value: 2.5–5.5V input range accepts USB variation; 0.6V reference enables accurate 1.2V setting without external resistors. |
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 | 1.2V fixed output, 1.8MHz switching, 25µA IQ, but only 0.6A max output current. | Limited to lower-current MCU cores; unsuitable for 1A loads like RF transceivers. | Select when board space is tighter and load current ≤600mA; verify thermal margin in DRY package. |
| RT8059GJ6 | 1.2V fixed, 1.5A output, 30µA IQ, but requires external compensation and lacks integrated soft-start. | Needs additional design effort for loop stability and startup control; higher BOM count. | Choose only if >1A output is mandatory and layout allows extra compensation components. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2305CGF120 delivers full 1A capability with integrated soft-start and minimal external components in a thermally enhanced DFN2x2-6 package-ideal for space-constrained, battery-sensitive applications where 1.2V rail stability and low-IQ are critical.
Availability
PAM2305CGF120 is available at Aetrix Electronics and suitable for wireless headsets, smart wearables, digital audio players, and USB-powered sensors requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for PAM2305CGF120 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' Power Management product line, engineered specifically for portable and battery-operated devices needing compact, high-efficiency step-down conversion with intelligent light-load optimization.
FAQ
What is the maximum recommended output current for PAM2305CGF120 in DFN2x2-6 package?
The DFN2x2-6 package supports up to 1A continuous output current under proper PCB thermal design: 2-layer board with ≥1in² copper pour on top/bottom layers connected to the exposed thermal pad. At TA = 25°C, maximum power dissipation is 980mW; exceeding this risks thermal shutdown above 150°C junction temperature.
Does PAM2305CGF120 require external feedback resistors for 1.2V output?
No. The "120" suffix indicates factory-trimmed fixed 1.2V output; internal resistor divider sets VOUT = 1.2V ±3% without external components. The VOUT/FB pin is internally connected and must not be externally loaded or biased.
How does the enable (EN) pin behave during power-up and shutdown?
EN is a CMOS-compatible input: device enables when EN ≥1.5V (typical), shuts down when EN ≤0.3V (typical). During shutdown, input-to-output isolation is maintained and quiescent current drops below 0.1µA. No pull-up/pull-down is required unless system-level control demands defined default state.
Can PAM2305CGF120 operate with input voltage equal to output voltage (1.2V)?
No. Minimum input voltage is 2.5V per datasheet specifications. Operation below 2.5V triggers UVLO, disabling regulation. For 1.2V output, minimum practical input is 2.5V - resulting in ≥105% duty cycle, but the device remains functional with reduced efficiency due to increased conduction loss in the P-MOSFET.
PAM2305CGF120 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):
- 1.2V
- 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)
PAM2305CGF120 FAQ
1.How can I place an order for PAM2305CGF120 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305CGF120 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 PAM2305CGF120 reliable?
The price and inventory of PAM2305CGF120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305CGF120 is usually 5 days.
3.What payment methods are accepted for PAM2305CGF120?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305CGF120 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305CGF120?
PAM2305CGF120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305CGF120 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 PAM2305CGF120?
For technical support, including PAM2305CGF120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305CGF120 requirements.
6.How does Aetrix verify that PAM2305CGF120 is sourced from the original manufacturer or authorized distributors?
All PAM2305CGF120 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 PAM2305CGF120 meets industry standards.
7.What is the process for return or replacement of PAM2305CGF120?
All PAM2305CGF120 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305CGF120, 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 PAM2305CGF120 part is unused and in its original packaging.
Return procedure for PAM2305CGF120:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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