LT1370CR#TRPBF

Voltage - Output (Min/Fixed):	1.245V
Base Part Number:	LT1370
Supplier Device Package:	D2PAK-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	6A (Switch)
Voltage - Output (Max):	35V (Switch)
Series:	--
Voltage - Input (Max):	30V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Cuk, Flyback, Forward Converter, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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IntroductionThe LT1370CR#TRPBF is a dual output, high frequency, step down switching regulator for efficiently powering multiple voltage rails from a single 2.97V to 24V or dual input sources. The LT1370CR#TRPBF can handle up to 4A current from its respective outputs and can provide up to 96% efficiency due to its unique combination of auto-skip mode, direct power gating, and soft-start function. Its adjustable switching frequency and low noise current modulators allow the LT1370CR#TRPBF to be used in a variety of applications.Application FieldsThe LT1370CR#TRPBF is the ideal low quiescent current solution for powering CPU cores, FPGAs, and battery charger systems. It is capable of providing tight load and line regulation with minimum output voltage drops to always ensure the system remains stable over a wide input voltage range and temperature. Due to its high efficiency and low quiescent current, the LT1370CR#TRPBF is a great choice for powering portable, battery-operated devices such as cell phones and PDAs. Additionally, its built-in soft-start and burst modes can be used for customized start-up behavior.Working PrincipleThe LT1370CR#TRPBF works by employing a high frequency, monolithic, double-ended switching regulator. This regulator intelligently switches its two channels on and off in order to achieve the desired output voltage. The switching frequency is adjustable and can be set as low as 0.2kHz or as high as 2MHz, depending on the application. Additionally, the LT1370CR#TRPBF employs an auto-skip mode that allows the frequency to dynamically change based on load and input voltage. This feature enables the regulator to optimize efficiency while maintaining stability.The LT1370CR#TRPBF also includes an integrated low- power enable input, allowing the user to place the regulator in a low-power, Skip (sleep) mode. When enabled, this feature significantly decreases the power consumption of the regulator, especially when there is only light load or light input voltage.Finally, the LT1370CR#TRPBF can also include a precision output voltage offset feature, which reduces the need for additional trim components and increases system accuracy.ConclusionThe LT1370CR#TRPBF is a dual-channel, high frequency, step down switching regulator for efficiently powering multiple voltage rails from a single 2.97V to 24V or dual input sources. Its adjustable switching frequency, auto-skip mode, direct power gating, soft-start function, and integrated low-power enable input make it an ideal choice for powering CPU cores, FPGAs, battery charger systems, and other portable, battery-operated devices. Additionally, its precision output voltage offset feature simplifies system design and ensures accuracy.

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