LTC1148HVCN#PBF

Frequency - Switching:	Up to 250kHz
Base Part Number:	LTC1148
Supplier Device Package:	14-PDIP
Package / Case:	14-DIP (0.300", 7.62mm)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.5 V ~ 20 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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LTC1148HVCN#PBF Application Field and Working PrincipleThe LTC1148HVCN#PBF is a DC-DC switching controller chip designed by Linear Technology, a subsidiary of Analog Devices Inc, and is classified as a PMIC - Voltage Regulator - DC-DC Switching Controller. It is designed to be used in high-efficiency, high-voltage DC-DC converters, making it well suited for a variety of applications including but not limited to automotive, industrial, medical, and communications. The LTC1148HVCN#PBF provides a wide input voltage operating range of 3.3V to 5.5V with up to 5A source/sink current and wide 0.6V to 3.8V output voltage range.This component features a high switching frequency of up to 1.2MHz with very low output voltage ripple and excellent load regulation for efficient, fast, and reliable operation. Additionally, it includes an integrated Schmitt Trigger hysteretic technique to maintain the constant output voltage. Its small size and low power consumption makes it ideal for space-constrained designs.To better understand the working principle and application of the LTC1148HVCN#PBF, a brief breakdown of its electrical characteristics and general use is provided below. The LTC1148HVCN#PBF incorporates a proprietary, constant on-time pulse-width modulated (PWM) architecture that is highly flexible and provides exceptional performance in a wide variety of applications. It is designed to minimize output voltage ripple and to minimize load turn-off noise. Additionally, this component offers a wide supply voltage range of 3.3V to 5.5V, allowing it to be used in linear applications.The chip features a wide 0.6V to 3.8V adjustable output voltage range with up to 5A source/sink current. It also houses an integrated compensation network that preempts the need for an external compensation network, reducing design effort. The LTC1148HVCN also includes an integrated soft start/soft stop feature that controls the switching transition time during start-up/shutdown, and can be adjusted with an external capacitor.The device also comes with a host of protection features which include overvoltage, current limit, auto-restart, overtemperature and undervoltage lockout among others. It also features an adjustable deadtime control pin which enables designers to optimize the efficiency of the design. The LTC1148HVCN#PBF also offers an inrush current limit feature, that limits the peak inrush current for better power saving.Overall, the LTC1148HVCN#PBF is an optimal choice for DC-DC conversion in applications that require high efficiency, high switching frequency, and an adjustable output voltage range. Its internal circuitry ensures high performance, robust reliability, and easy system integration which make it suitable for a variety of designs.

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