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News
20V, 4MHz, Synchronous Dual 6A Step-Down Regulator in a Compact 4mm x 5mm QFN
2017-06-26 | ReturnEach channel of the LTC3636/-1 uses internal switches with RDS (ON) of only 32mΩ and 18mΩ to deliver efficiencies as high as 95%. Its unique control architecture enables it to achieve duty cycles as low as 5% while maintaining switching frequencies up to 2.25MHz, ideal for high step-down ratio applications such as 12VIN to 1.8VOUT conversions. The two channels run 180 degrees out-of-phase, minimizing the size of both input and output capacitance. The dual outputs may be combined in a 2-phase configuration for up to 12A output current. Burst Mode® operation is used to maximize light load efficiency, requiring 600µA at no load. For applications requiring the lowest possible noise, the LTC3636/-1 can be configured to run in forced continuous operation, reducing supply ripple and potential RF interference. Additional features include a die temperature monitor, power good voltage monitors, output voltage tracking capability, independent soft-start capability for each channel, short-circuit protection, input overvoltage and overtemperature protection.
The LTC3636 is available in a thermally enhanced, 4mm x 5mm QFN-28 package. E- and I-grade versions are guaranteed to operate over the ̶ 40°C to 125°C operating junction temperature, pricing starts at $4.45 each for 1,000-piece quantities of the E grade. All versions are available from stock. For more information, visit linear.com/product/LTC3636-1.
Summary of Features: LTC3636/-1
• 3.1V to 20V Input Voltage Range
• Ultralow EMI/EMC Emissions
• 6A Output Current per Channel
• Up to 95% Efficiency
• VOUT Sense Ranges:
o 0.6V to 5V (LTC3636)
o 1.8V to 12V (LTC3636-1)
• Die Temperature Monitor
• Adjustable Switching Frequency: 500kHz to 4MHz
• External Frequency Synchronization
• Current Mode Operation for Excellent Line & Load Transient Response
• 0.6V Reference Allows Low Output Voltages
• User Selectable Burst Mode® Operation or Forced Continuous Operation
• Output Voltage Tracking & Soft-Start Capability
• Short-Circuit Protected
• Input Overvoltage & Overtemperature Protection
• Power Good Status Outputs
• Low Profile 4mm × 5mm 28-Lead QFN Package
Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.
Source:http://www.linear.com/