LTC1159CG#PBF

Frequency - Switching:	Up to 250kHz
Base Part Number:	LTC1159
Supplier Device Package:	20-SSOP
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 40 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive or Negative
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

LTC1159CG#PBF is a 15V High Voltage DC-DC Controller designed for automotive applications. It is part of Linear Technology\'s switching regulator controller family and is used to control a wide range of input/output voltages and currents. The LTC1159CG#PBF is a versatile DC-DC switching regulator Controller that provides pulse width modulation (PWM) control of DC-DC converters with high efficiency, low noise and low total cost. It can be used in any type of standard or low-power automotive applications.

Application Field

The LTC1159CG#PBF is primarily designed for automotive applications, such as battery charging, fuel pump, headlight dimming, lighting and air conditioning control, audio/video power supply control, and other low-power automotive applications. It can also be used in medical equipment, instrumentation devices, professional audio amplifiers, UPS power supply and other systems where high efficiency and low noise need to be maintained. The LTC1159CG#PBF can control a wide range of input/output voltages and currents, with a versatile and efficient control scheme. It has a high power-delivery capability and a wide range of switching frequencies, up to 4MHz. It also has an adjustable current-limit function for simple, safe and efficient operation.

Working Principle

The LTC1159CG#PBF uses the pulse width modulation (PWM) control technique to implement an adjustable DC-DC converter. The input voltage is monitored and compared with a reference voltage. If the input voltage is lower than the reference voltage, the internal oscillator outputs a short pulse-width modulated (PWM) signal to the output gate drivers. The gate drivers in turn activate the external MOSFETs or IGBTs on the DC-DC converter, allowing current to flow through the converter and delivering power to the output. For low power applications, the LTC1159CG#PBF’s startup current is minimized, meaning that the controller can be used in applications where energy saving or power management is necessary. Additionally, its wide operating range, adjustable overvoltage/overcurrent protection and adjustable switching frequency makes the LTC1159CG#PBF well suited for a variety of applications.

Conclusion

The LTC1159CG#PBF is a 15V High Voltage DC-DC Controller designed for automotive applications. Its primary application field is automotive, but can be used in medical equipment, instrumentation devices, professional audio amplifiers, UPS power supplies and other systems. The LTC1159CG#PBF uses PWM control to implement an adjustable DC-DC converter, with a high power delivery capability and wide range of switching frequencies. It is also well suited for applications where energy savings or power management is desired, due to its low startup current and adjustable overvoltage/overcurrent protection.

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