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Part Number: ACT4070YH
Description: The ACT4070 is a current-mode step-down DC/DC converter that generates up to 3A output current at 400k...
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ACT4070YH
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DataSheet
General Description
ACT4070YH General Description
The ACT4070 is a current-mode step-down DC/DC converter that generates up to 3A output current at 400kHz switching frequency. The device utilizes Active-Semi's proprietary ISOBCD30 process for operation with input voltage up to 30V.
Consuming only 6A in shutdown mode, the ACT4070 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency fold back at short circuit. The device also includes an internal soft start function to prevent overshoot.
The ACT4070 is available in SOP-8/EP exposed pad package and requires very few external devices for operation.
ACT4070YH Maximum Ratings
| PARAMETER | VALUE | UNIT |
| IN to G | -0.3 to +34 | V |
| EN to G | -0.3 to VIN + 0.3 | V |
| SW to G | -1 to VIN + 1 | V |
| BS to SW | -0.3 to +8 | V |
| FB, COMP to G | -0.3 to | V |
| Continuous SW Current | Internally limited | A |
| Junction to Ambient Thermal Resistance (JA) | 46 | °C/W |
| Maximum Power Dissipation | 1.8 | w |
| Operating Junction Temperature | -40 to 150 | °C |
| Storage Temperature | -55 to 150 | °C |
| Lead Temperature (Soldering, 10 sec) | 300 | °C |
| 1: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability. | ||
ACT4070YH Features
` 3A Output Current
` Up to 95% Efficiency
` 4.5V to 30V Input Range
` 6A Shutdown Supply Current
` 400kHz Switching Frequency
` Adjustable Output Voltage
` Cycle-by-Cycle Current Limit Protection
` Thermal Shutdown Protection
` Internal Soft Start Function
` Frequency Fold Back at Short Circuit
` Stability with Wide Range of Capacitors,
Including Low ESR Ceramic Capacitors
` SOP-8/EP (Exposed Pad) Package
` Up to 95% Efficiency
` 4.5V to 30V Input Range
` 6A Shutdown Supply Current
` 400kHz Switching Frequency
` Adjustable Output Voltage
` Cycle-by-Cycle Current Limit Protection
` Thermal Shutdown Protection
` Internal Soft Start Function
` Frequency Fold Back at Short Circuit
` Stability with Wide Range of Capacitors,
Including Low ESR Ceramic Capacitors
` SOP-8/EP (Exposed Pad) Package
ACT4070YH Typical Application
· TFT LCD Monitors or Televisions and HDTV
· Portable DVD Players
· Car-Powered or Battery-Powered Equipment
· Set-Top Boxes
· Telecom Power Supplies
· DSL and Cable Modems and Routers
· Portable DVD Players
· Car-Powered or Battery-Powered Equipment
· Set-Top Boxes
· Telecom Power Supplies
· DSL and Cable Modems and Routers
ACT4070YH Connection Diagram
ACT4070YH-T
PDF/DataSheet Download
- Datasheet: ACT4070YH-T
- File Size: 604546 KB
- Manufacturer: ACTIVE-SEMI
- Click here to Download
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The ACT4070 is a current-mode step-down DC/DC converter that generates up to 3A output current at 400kHz switching frequency. The device utilizes Active-Semi's proprietary ISOBCD30 process for operation with input voltage up to 30V.Consuming only 6A in shutd...
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