CS51412 Series

Buck Regulator, Low Voltage, 1.5 A, 260 kHz, with External Bias

Catalog

Buck Regulator, Low Voltage, 1.5 A, 260 kHz, with External Bias

Part	Mounting Type	Topology	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Output (Max)	Current - Output	Output Configuration	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Function	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Frequency - Switching
ON Semiconductor CS51412GDR8G	Surface Mount	Buck	1	150 °C	-40 °C	Adjustable	38 V	1.5 A	Positive	8-SOIC	8-SOIC	3.9 mm	0.154 in	Step-Down	1.27 V	4.5 V	260 kHz
ON Semiconductor CS51412GD8G	Surface Mount	Buck	1	150 °C	-40 °C	Adjustable	38 V	1.5 A	Positive	8-SOIC	8-SOIC	3.9 mm	0.154 in	Step-Down	1.27 V	4.5 V	260 kHz
ON Semiconductor CS51412EDR8	Surface Mount	Buck	1	150 °C	-40 °C	Adjustable	38 V	1.5 A	Positive	8-SOIC	8-SOIC	3.9 mm	0.154 in	Step-Down	1.27 V	4.5 V	260 kHz
ON Semiconductor CS51412ED8	Surface Mount	Buck	1	150 °C	-40 °C	Adjustable	38 V	1.5 A	Positive	8-SOIC	8-SOIC	3.9 mm	0.154 in	Step-Down	1.27 V	4.5 V	260 kHz

Catalog

Buck Regulator, Low Voltage, 1.5 A, 260 kHz, with External Bias

Key Features

• V2Architecture Provides Ultra-Fast Transient Response, Improved Regulation and Simplified Design

• 2.0% Error Amp Reference Voltage Tolerance

• Switch Frequency Decrease of 4:1 in Short Circuit Conditions

• BOOST pin for Bootstrapped Operation

• Synchronization Function

• Shutdown Lead Provides Power-Down Option

• 85uA Quiescent Current During Power-Down

• Thermal Shutdown

• Soft Start

• Pin-Compatible with LT1375 and LT1376

• Pb-Free Packages are Available

Description

The CS5141X products are 1.5A buck regulator ICs. These devices are fixed- frequency operating at 260kHz and 520kHz. The regulators use the V2control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today's high- speed logic. These products accommodate input voltages from 4.5V to 40V.The CS51411 and CS51413 contain synchronization circuitry. The CS51412 and CS51414 have the option of powering the controller from an external 3.3V to 6V supply in order to improve efficiency, especially in high input voltage, light load conditions.The on-chip NPN transistor is capable of providing a minimum of 1.5A of output current, and is biased by an external "boost" capacitor to ensure saturation, thus minimizing on-chip power dissipation. Protection circuitry includes thermal shutdown, cycle-by- cycle current limiting and frequency foldback. The CS51411 and CS51413 are functionally pin-compatible with the LT1375. The CS51412 and CS51414 are functionally pin-compatible with the LT1376.