LTC1147LIS8#PBF

Frequency - Switching:	--
Base Part Number:	LTC1147
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.5 V ~ 14 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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Application Field and Working Principle of LTC1147LIS8#PBF

The LTC1147LIS8#PBF is a high voltage PWM switching regulator controller integrated circuit, capable of producing a steady fixed voltage output, which is suited for a wide variety of applications, including power supply design and battery-powered devices. It is classified as part of DC DC switching controllers within the PMIC (Power Management IC) voltage regulator family. The robust design and fully featured selection of components on the LTC1147LIS8#PBF ensures that it is suitable for both low and high power applications. It is a fully integrated high voltage analog switching regulator controller, designed to provide a fixed voltage supply and operates in the pulse width modulation (PWM) mode, featuring three logic-controlled light load saving modes. The device has remarkably low quiescent current required for these savings modes.The LTC1147LIS8#PBF has a high operating temperature range of -40°C to 85°C and is manufactured with micropower CMOS technology. Its high speed switching frequency can be optimized to 85kHz when a direct control oscillator is used, while its usual operation frequency is set at 250kHz. The current mode architecture of the device includes a 0.3% accurate voltage reference, a high current totem pole output, current sensing amplifier and logic comparator, complete with an adjustable current limit and soft start.The LTC1147LIS8#PBF features a wide operational supply voltage range of 3.2V to 44V, accommodating both automotive and portable applications. Other important features include current-mode PWM control with correct slope compensation, dual output optimized for low ripple with wide output voltage range, and an over temperature protection for additional safety. The LTC1147LIS8#PBF implements an innovative reference feed-forward circuit, which grants it the ability to obtain higher conversion efficiency, higher load current and lower output voltage ripple. It also boasts a wide output voltage range from 0.8V to 40V, which , along with its assured power and very low output ripple, makes it a perfect choice for powering microprocessors and other integrated circuits requiring steady voltage supply. The main working principle behind the LTC1147LIS8#PBF is that it produces a steady fixed voltage output by employing pulse width modulation (PWM) as its main working principle. As the internal logic circuitry of the device chooses constantly the most adequate voltage applied to the output pins of the integrated circuit, the output can be said to be precisely regulated. The accuracy of the LTC1147LIS8#PBF is ensured by its internal bandgap voltage reference circuit, which is precisely adjusted by trimming the internal resistors during manufacturing.The LTC1147LIS8#PBF is one of the best-suited high voltage controllers for a wide array of applications, capable of producing stable voltage at very low cost. The ease of application and the enhanced power-saving modes, together with the steady output voltage, place this specific device as one of the most popular ICs within the PMIC - Voltage Regulators - DC DC Switching Controllers family.In conclusion, the LTC1147LIS8#PBF is a highly integrated high voltage analog switching regulator controller, which is suitable for both low and high power applications. It offers a wide operating temperature range of -40°C to 85°C and a wide output voltage range from 0.8V to 40V. It also features current-mode PWM control with correct slope compensation, dual output optimized for low ripple with wide output voltage range, and an over temperature protection for extra safety. Furthermore, pulse width modulation (PWM) is employed as its main working principle in order to obtain a stable voltage output. The ease of application and the steady output voltage make the LTC1147LIS8#PBF an ideal choice for a wide variety of applications, specially those in need of a low cost high voltage controller, thus making it one of the most popular integrated circuits within the PMIC - Voltage Regulators - DC DC Switching Controllers family.

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