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LM27402 датащи(PDF) 1 Page - Texas Instruments |
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LM27402 датащи(HTML) 1 Page - Texas Instruments |
1 / 48 page CBOOT HG SW LG GND SS/TRACK FB COMP FADJ SYNC VIN VOUT+ VOUT± LM27402 VOUT+ VIN VDD GND Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM27402 SNVS615J – JANUARY 2010 – REVISED JULY 2015 LM27402 High-Performance Synchronous Buck Controller With DCR Current Sensing 1 Features 3 Description The LM27402 is a voltage-mode, synchronous, DC- 1 • Wide Input Voltage Range of 3 V to 20 V DC step-down controller with lossless inductor DCR • Inductor DCR or Shunt Resistor Based current sensing capability. Sensing the inductor Overcurrent Protection current eliminates the need to add resistive • 0.6-V Reference With ±1% FB Accuracy Across powertrain elements, which increases overall efficiency and facilitates accurate, continuous current Full –40°C to 125°C Junction Temperature Range sensing. A 0.6-V ±1% voltage reference enables high • Switching Frequency from 200 kHz to 1.2 MHz accuracy and low voltage capability at the output. An • Output Voltage as High as 95% of Input Voltage input operating voltage range of 3 V to 20 V makes • Integrated High-Current MOSFET Drivers the LM27402 suitable for a large variety of input rails. • Internal VDD Bias Supply LDO Subregulator The LM27402 voltage-mode control loop incorporates • External Clock Synchronization input voltage feed-forward to maintain stability throughout the entire input voltage range. The • Adjustable Soft-Start With External Capacitor switching frequency is adjustable from 200 kHz to • Pre-Biased Start-up Capability 1.2 MHz. Dual, high-current, integrated MOSFET • Power Supply Tracking drivers support large QG, low RDS(on) power MOSFETs. A power good indicator provides power • Voltage-Mode Control With Line Feedforward rail sequencing capability and output fault detection. • Open-Drain Power Good Indicator An adjustable external soft-start limits inrush current • Precision Enable With Hysteresis and provides monotonic output control during start- • HTSSOP-16 and WQFN-16 Packages up. Other features include external tracking of other power supplies, integrated LDO bias supply, and synchronization capability. 2 Applications • High Current, Low Voltage Supply for FPGA and Device Information(1) ASIC PART NUMBER PACKAGE BODY SIZE (NOM) • General-Purpose, High-Current Buck Converters WQFN (16) 4.00 mm × 4.00 mm LM27402 • DC-DC Converters and POL Modules HTSSOP (16) 5.00 mm × 4.40 mm • Telecom, Datacom, Networking, Distributed Power (1) For all available packages, see the orderable addendum at Architectures the end of the data sheet. Typical Application Circuit 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Аналогичный номер детали - LM27402 |
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Аналогичное описание - LM27402 |
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