CS51412

Features:

• V² Architecture Provides UltraFast Transient Response, Improved Regulation and Simplified Design
• 2.0% Error Amp Reference Voltage Tolerance
• Switch Frequency Decrease of 4:1 in Short Circuit Conditions Reduces Short Circuit Power Dissipation
• BOOST Lead Allows "Bootstrapped" Operation to Maximize Efficiency
• Sync Function for Parallel Supply Operation or Noise Minimization
• Shutdown Lead Provides PowerDown Option
• 85 A Quiescent Current During PowerDown
• Thermal Shutdown
• Soft Start
• PinCompatible with LT1375 and LT1376


Pinout

Specifications

Rating	Value	Unit
Operating Junction Temperature Range, TJ	40 to 150	°C
Lead Temperature Soldering: Reflow:                    (SMD styles only) (Note 1)	230 peak	°C
Storage Temperature Range, TS	65 to +150	°C
ESD Damage Threshold (Human Body Model)	2.0	kV

Description

The CS5141X products are 1.5 A buck regulator ICs. These devices are fixedfrequency operating at 260 kHz and 520 kHz. The regulators use the V^2TM control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today's highspeed logic. These products accommodate input voltages from 4.5 V to 40 V. The CS51411 and CS51413 contain synchronization circuitry. The CS51412 and CS51414 have the option of powering the controller from an external 3.3 V to 6.0 V supply in order to improve efficiency, especially in high input voltage, light load conditions.

The onchip NPN transistor is capable of providing a minimum of 1.5 A of output current, and is biased by an external "boost" capacitor to ensure saturation, thus minimizing onchip power dissipation. Protection circuitry includes thermal shutdown, cyclebycycle current limiting and frequency foldback. The CS51411 and CS51413 are functionally pincompatible with the LT1375. The CS51412 and CS51414 are functionally pincompatible with the LT1376.