LTC1629IG-PG#TRPBF

Frequency - Switching:	220kHz
Base Part Number:	LTC1629
Supplier Device Package:	28-SSOP
Package / Case:	28-SSOP (0.209", 5.30mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Phase Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	99.5%
Series:	PolyPhase®
Voltage - Supply (Vcc/Vdd):	4 V ~ 36 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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Features and Benefits

LTC1629IG-PG#TRPBF is a high performance DC/DC switching controller featuring a switching frequency up to 1MHz, 16V integrated power switch, and adjustable current limiting. The highly integrated device is well-suited for a wide range of consumer, industrial and communication applications.

Key Features

•Integrated 16V MOSFET switch•High accuracy current sense amplifier•On-chip oscillator with selectable switching frequency up to 1MHz•0.75V to 5.5V adjustable VDD input voltage•Internal soft-start•High-accuracy current limit protection•Cycle-by-cycle current limit protection•Thermal shutdown•Load short-circuit current limiting•Programmable power good indicator

Applications

•Notebook and desktop computer power supplies•TV power supplies•Telecom equipment power supplies•Hard disk drive power supplies•Portable device power supplies•Battery chargers•AC to DC converters•DC to DC converters

Block Diagram

The LTC1629IG-PG#TRPBF block diagram is shown below.

Working Principle

The LTC1629IG-PG#TRPBF DC/DC switching controller allows the user to implement a high performance, highly integrated switching power supply. It integrates the power switch, MOSFET driver and control circuitry into a single small package. The switching frequency is set by an internal oscillator and can be set to any frequency between 500kHz and 1MHz. The required maximum RMS voltage and current of the power switch are programmed using external components. The current sense amplifier provides tight reference accuracy and fast response to dynamic current loads. The LTC1629IG-PG#TRPBF requires very little external circuitry for setting the desired output parameters. The device also provides protection features such as cycle-by-cycle current limit, thermal shutdown and load short-circuit current limit protection. An adjustable soft-start feature is also included and is used to reduce the inrush current and output voltage transients at turn-on. The output voltage is monitored by an internal voltage reference and an external voltage feedback circuit. If the output voltage exceeds the set voltage, a voltage good signal will be generated and the device will enter into a shutdown state.

Conclusion

In conclusion, the LTC1629IG-PG#TRPBF is a high performance, highly integrated DC/DC switching controller featuring a switching frequency up to 1MHz, 16V integrated power switch and adjustable current limiting. It is well-suited for a wide range of consumer, industrial, and communication applications and provides tight reference accuracy, fast response, and protection features.

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