LTC3887EUJ-1#TRPBF

Frequency - Switching:	250kHz ~ 1MHz
Base Part Number:	LTC3887
Supplier Device Package:	40-QFN (6x6)
Package / Case:	40-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Phase Control
Serial Interfaces:	I²C, PMBus
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	PolyPhase®
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 24 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC3887EUJ-1#TRPBF is a high efficiency DC-DC step-down monolithic synchronous switching controller developed by Linear Technology Corporation. This device has a 1.3MHz fixed frequency, peak current-mode control operating up to 100V input voltage range, and provides up to 6A continuous output current. It also has precise regulation with patent pending differential remote sense and 12-bit DAC voltage control. Furthermore, the part features extra features such as soft start, pulse-skipping and burst mode operation, eliminating the need for external compensation networks. The LTC3887EUJ-1#TRPBF application and working principle are described in detail in the following section.

Application Field

The LTC3887EUJ-1#TRPBF is well-suited for use as a power management unit (PMU) in applications such as Battery Management Systems (BMS), Industrial, Smart Home and Automobiles. With a wide input voltage range of 6V to 100V, this device can provide tightly regulated DC output. It is also suitable for applications that require high accuracy, including telecom and computing applications.The device can be used as a high-efficiency synchronous step-down converter for applications such as power supplies for computing and networking systems as well as for industrial applications. The LTC3887EUJ-1#TRPBF has an integrated PMOS switch which helps reduce the need for external components and hence reduces board space and cost.

Working Principle

The LTC3887EUJ-1#TRPBF integrates an internal PMOS switch to reduce external component count and board space utilization. The device utilizes a self-biased peak current-mode controller which allows for higher accuracy and better load transient response than a voltage-mode control.The LTC3887EUJ-1#TRPBF operates over a wide input voltage range of 6V to 100V, with outputs as low as 1.23V. It features a 1.3MHz fixed frequency, internal slope compensation, and a programmable soft-start feature.The device provides precise voltage regulation, with a differential remote sensing feature that eliminates the need for external resistor dividers to set the output voltage. The device also has a 12-bit DAC attached to the loop pin which can be used to adjust the output voltage.The device includes features such as pulse-skipping and burst-mode operation to reduce power consumption at light loads which helps improve the system efficiency. It also features a programmable over-voltage protection circuit to protect the power supply in case of an overload or other fault conditions.

Conclusion

The LTC3887EUJ-1#TRPBF is a high efficiency DC-DC step-down monolithic synchronous switching controller developed by Linear Technology Corporation. This device has a 1.3MHz fixed frequency, peak current-mode control operating up to 100V input voltage range, and provides up to 6A continuous output current. It also has precise regulation with patent pending differential remote sense and 12-bit DAC voltage control. Furthermore, the part features extra features such as soft start, pulse-skipping and burst mode operation, eliminating the need for external compensation networks. It has a wide variety of applications, ranging from Battery Management Systems (BMS) to Industrial, Smart Home and Automobile applications. The LTC3887EUJ-1#TRPBF is an excellent choice for its high efficiency, low component count, and excellent power management capabilities.

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