LTC3388IDD-3#PBF

Voltage - Output (Min/Fixed):	2.8V, 3V, 3.3V, 5V
Base Part Number:	LTC3388
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	--
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	20V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LTC3388IDD-3#PBF is an integrated DC-DC switching power regulator of Peak Current Mode (PCM) step-down family for high current applications. It is the first of its kind among the Watt Saver products from Linear Technology. The regulator is built with a variety of features to reduce power consumption, such as low dropout operation, low component count, and low output voltage ripple.The operating voltage range of the LTC3388IDD-3#PBF is from 2.5 V to 6.5 V. The input current is not more than 5 A, the output current is not more than 3.8 A, and the output voltage range is from 0.8 V to the input voltage. Its external component count is very small, only including a capacitor to filter the output voltage and an inductor to store the energy. Such design with low component count can save a lot of space on the PCB. The LTC3388IDD-3#PBF has an enable feature and can be operated from a single enable pin. Application FieldThe LTC3388IDD-3#PBF is suitable for voltage regulators in a variety of applications, such as networking, automotive, industrial and medical. The built-in safety features such as thermal shutdown, current limit and over voltage protection provide a great safety protection to the application. Its wide input voltage range provides a cost-effective solution for system power design.The LTC3388IDD-3#PBF is especially suitable for high current motor control applications. Its high peak current mode allows it to handle high current with less switching loss. This makes it an excellent choice for motor control applications, such as motor control in automotive and industrial applications.In addition, the LTC3388IDD-3#PBF can also be used in power supplies, voltage conversion and voltage regulation applications. Its low dropout and low component count makes it an ideal solution for low power and high reliability power supply designs.Working PrincipleThe working principle of the LTC3388IDD-3#PBF is based on the peak current mode control, which is ideal for handling high current with lower power consumption. The power regulation loop is operated in open-loop to provide a coreless,zero current fluctuation regulation scheme. It provides an adaptive input voltage range between 2.5V and 6.5V. The switching frequency is adjustable from 250kHz to 2.2MHz.The LTC3388IDD-3#PBF operates with a low RDSON MOSFET to reduce power dissipation. The output voltage is regulated by controlling the duty cycle of the switching cycle and using the external LC-filter. The switching frequency is adjusted with the use of a resistor, which provides a smoother transition of the output voltage. The built-in safety features such as thermal shutdown, current limit and over voltage protection give the LTC3388IDD-3#PBF an extra layer of reliability.The LTC3388IDD-3#PBF allows the user to adjust the output voltage setting with the use of a resistive voltage divider. The output voltage is monitored through an open-drain output. The device enters power saving mode when the output load is reduced, resulting in operational efficiency.The LTC3388IDD-3#PBF also offers several selectable enable options to optimise the performance and efficiency of the application. It can be enabled through the use of a enable pin, or by controlling the enable pin with the output load pin. This makes the device suitable for medical, industrial and automotive applications, where the power supply must remain stable. In conclusion, the LTC3388IDD-3#PBF is a highly efficient and reliable DC-DC switching regulator. It is suitable for applications with high current operation, such as motor control and voltage conversion. Its integrated features, low component count and power saving mode provide additional advantages to its user.

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