LTC3830ES#TRPBF

Frequency - Switching:	200kHz
Base Part Number:	LTC3830
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	95%
Series:	--
Voltage - Supply (Vcc/Vdd):	3 V ~ 8 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC3830ES#TRPBF: Application Field and Working Principle

The LTC3830ES#TRPBF is one of the DC-DC switching controllers released by Linear Technology, belong to their Power Management IC (PMIC) Line Voltage Regulators product family. This particular device is a synchronous step-down DC/DC controller which selectively allows a constant output voltage from a variable input voltage source. It provides a simple, efficient, and comprehensive design solution for powering a wide range of applications. Furthermore, it supports high-performance, cost-effective, and reliable operation while offering a variety of integrated features to ease design process. It is offered in small form factors such as the 16- lead narrow body SOIC (N-pack) and 15- lead TSSOP (E-pack). It operates from a supply voltage range of 2. 95V to 9.25V and requires few external components. The output voltage can be set as low as 0.8V with a 0.2% reference accuracy, which is suitable for variety of inductor current levels with the 0.25A to 5A available current limit range. Other features include maximum operating frequency up to 2.2MHz, a programmable soft-start for output voltage and current, as well as undervoltage, overvoltage, thermal, and current limit protections.

Working Principle

The LTC3830ES#TRPBF synchronous step-down controller is used to generate a regulated output from a variable input voltages source. It uses a controller integrated buck regulator with the voltage loop directly feeding a synchronous MOSFET driver. The unregulated input voltage passes through an input filter inductor and is then supplied to the controller’s non-inverting input. If the input voltage is too low, an external undervoltage lockout circuit (UVLO) will shut off the MOSFET switch. The power stage has two independent synchronous MOSFETs that operate 180 degrees out of phase, one low side and one high side.When the high side MOSFET is on, no current passes through the low side switch. When the high side switch is off, current flows through the inductor, which is of course a function of the voltage across the inductor and the inductance. Both high and low side switches are connected to a PWM controller that uses a voltage feedback loop to maintain the output voltage at a predefined level. The PWM controller modulates the duty cycle of the switches depending on the output voltage to maintain the desired voltage level.

Applications

The LTC3830ES#TRPBF controller can be used in a variety of applications and different types of digital and analogue circuits. It’s capable of provide constant and stable output power with extreme accuracy, even in environments where the input voltage can vary significantly. Its wide input voltage range enables it to provide power to a variety of load types, and its sharp rising edges enable it to be used in high speed switching converters. Applications such as optical communication modules and routers, distributed power architectures, gaming systems, and consumer AC adapters can benefit from the consistent, regulated output provided by the device. The device is also suitable for automotive applications, such as the powering of navigation systems, touchscreen displays, and Rear Entertainment systems. It can also be embedded in body controller systems and control motors and other automotive components efficiently, while providing excellent noise immunity. As it offers high level of reliability, even in harsh environments, it is also ideal for industrial applications, such as process controllers, HVAC systems, or motor drives. In summary, the LTC3830ES#TRPBF synchronous step-down controller offers an efficient, reliable, and comprehensive design solution for powering a wide range of applications. It provides accurate output voltages, capable of powering loads even in harsh environments while offering a wide range of integrated features to ease the design process.

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