The UC3825N is a high-speed PWM controller optimized for high-frequency switched-mode power supply applications. It supports both voltage and current mode topologies, with practical operation switching frequencies reaching up to 1 MHz. The device features a 50 ns propagation delay to output and high current dual totem pole outputs capable of sourcing and sinking 1.5 A peak currents, making it suitable for driving capacitive loads such as power MOSFET gates. Key protection features include pulse-by-pulse current limiting, soft start functionality, and under-voltage lockout with hysteresis, ensuring reliable operation in various conditions. The controller operates with a low startup current of 1.1 mA and includes a wide bandwidth error amplifier for improved performance. The UC3825N is designed for applications requiring step-up, step-down, or step-up/step-down voltage regulation, with a maximum duty cycle of 85%. It operates within a supply voltage range of 8.4 V to 30 V and is rated for an operating temperature range of 0¬8C to 70¬8C.
Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 16-PDIP
Manufacturer: Texas Instruments
Win Source Part Number: 035669-UC3825N
Packaging: Tube/Rail
Output Type: Transistor Driver
Frequency - Switching: 340kHz to 460kHz
Control Features: Current Limit, Enable, Frequency Control, Ramp, Soft Start
Number of Outputs: 2
Synchronous Rectifier: No
Family Name: UC3825N
Output Phases: 1
Duty Cycle (Max): 85%
Clock Sync: No
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: 0°C to 70°C (TA)
Case / Package: 16-PDIP
Purpose: Step-Up, Step-Down, Step-Up/Step-Down
Supply Voltage - Operating: 8.4 V to 30 V
Alternative Parts (Cross-Reference): HS9-1825ARH/Proto; SG1825CL; MC34025DWR2; MC33025DWR2;
Introduction Date: April 01, 2005
ECCN: EAR99
Country of Origin: Malaysia, Mexico
Estimated EOL Date: 2031
Halogen Free: Compliant
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 43 pct.
Supply and Demand Status: Limited
IC REG CTRLR MULT TOPOLOGY 16DIP
Switching Controllers High Speed PWM Controller
Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 16-PDIP
IC REG CTRLR MULT TOPOLOGY 16DIP
| DigiKey | Win Source Electronics | ODG (Origin Data Global) | VAST STOCK CO., LIMITED | Quarktwin Technology Ltd. | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|
| Product Category | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators |
| Product Number | 296-11271-5-ND | 035669-UC3825N | UC3825N | UC3825N | UC3825N | UC3825N |
| Product Name | DC DC Switching Controllers | PMIC - PMIC - Voltage Regulators - DCDC Switching Controllers - UC3825N | DC DC Switching Controllers | Switching Controllers | DC DC Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers |
| Configuration / Function | Buck; Boost | Buck; Boost | ||||
| Package Type | DIP; Other; "16-DIP (0.300"", 7.62mm)" | DIP; Other; 16-PDIP | DIP; Other; 16-DIP (0.300", 7.62mm) | DIP; Other; 16-DIP (0.300\", 7.62mm) | ||
| fsw | 340 to 460 kHz | 340 to 460 kHz | 340 kHz | 340 to 460 kHz | 340 to 460 kHz | |
| Operating Temperature | 0 to 70 C (32 to 158 F) | 0 to 70 C (32 to 158 F) | 0 to 70 C (32 to 158 F) | 0 to 70 C (32 to 158 F) | ||
| Output Voltage Type | Transistor Driver | Fixed; Transistor Driver |
