LT8570 Series

Boost/SEPIC/Inverting DC/DC Converter with 65V Switch, Soft-Start and Synchronization

Catalog

Boost/SEPIC/Inverting DC/DC Converter with 65V Switch, Soft-Start and Synchronization

Part	Voltage - Output (Max)	Mounting Type	Output Configuration	Package / Case	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Output Type	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed) [Min]	Voltage - Output (Min/Fixed) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Function	Number of Outputs	Supplier Device Package	Package / Case [custom]
Analog Devices LT8570IDD#PBF	65 V	Surface Mount	Positive or Negative	8-WFDFN Exposed Pad	750 mA	-40 °C	125 ¯C	Boost Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-DFN (3x3)
Analog Devices LT8570HDD-1#PBF	65 V	Surface Mount	Positive or Negative	8-WFDFN Exposed Pad	250 mA	-40 °C	150 °C	Boost Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-DFN (3x3)
Analog Devices LT8570EDD#PBF	65 V	Surface Mount	Positive or Negative	8-WFDFN Exposed Pad	750 mA	-40 °C	125 ¯C	Boost Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-DFN (3x3)
Analog Devices LT8570EMS8E-1#TRPBF	65 V	Surface Mount	Positive or Negative	8-MSOP 8-TSSOP Exposed Pad	375 mA	-40 °C	125 ¯C	Boost Charge Pump Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-MSOP-EP	0.118 in 3 mm
Analog Devices LT8570IDD#TRPBF	65 V	Surface Mount	Positive or Negative	8-WFDFN Exposed Pad	750 mA	-40 °C	125 ¯C	Boost Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-DFN (3x3)
Analog Devices LT8570EMS8E-1#PBF	65 V	Surface Mount	Positive or Negative	8-MSOP 8-TSSOP Exposed Pad	375 mA	-40 °C	125 ¯C	Boost Charge Pump Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-MSOP-EP	0.118 in 3 mm
Analog Devices LT8570IDD-1#PBF	65 V	Surface Mount	Positive or Negative	8-WFDFN Exposed Pad	375 mA	-40 °C	125 ¯C	Boost Charge Pump Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-DFN (3x3)
Analog Devices LT8570IMS8E#TRPBF	65 V	Surface Mount	Positive or Negative	8-MSOP 8-TSSOP Exposed Pad	750 mA	-40 °C	125 ¯C	Boost Cuk SEPIC	Adjustable	2.55 V	0.003 V	1.204 V	1.5 MHz	200 kHz	Step-Up Step-Up/Step-Down	1	8-MSOP-EP	0.118 in 3 mm

Catalog

Boost/SEPIC/Inverting DC/DC Converter with 65V Switch, Soft-Start and Synchronization

Key Features

• 65V Power Switch

• Current Limit Options of 0.5A (LT8570) or 0.25A (LT8570-1)

• Adjustable Switching Frequency

• Single Feedback Resistor Sets VOUT

• Synchronizable to External Clock

• High GainSHDNPin Accepts Slowly Varying Input Signals

• Wide Input Voltage Range: 2.55V to 40V

• Low VCESATSwitch

• Integrated Soft-Start Function

• Easily Configurable as a Boost, SEPIC, or Inverting Converter

• User Configurable Undervoltage Lockout (UVLO)

• Pin Compatible withLT3580andLT8580

• Tiny Thermally Enhanced 8-Lead 3mm × 3mm DFN and 8-Lead MSOP Packages

Description

The LT8570 and LT8570-1 are PWM DC/DC converters. The LT8570 contains a 0.5A, 65V power switch, while the LT8570-1 contains a 0.25A, 65V power switch. The LT8570 and LT8570-1 can be configured as either a boost, SEPIC or inverting converter.The LT8570/LT8570-1 have an adjustable oscillator, set by a resistor from the RT pin to ground. Additionally, the LT8570/LT8570-1 can be synchronized to an external clock. The switching frequency of the part may be free running or synchronized, and can be set between 200kHz and 1.5MHz.The LT8570/LT8570-1 also feature innovative SHDN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function.Additional features such as frequency foldback and softstart are integrated. The LT8570/LT8570-1 are available in tiny thermally enhanced 3mm × 3mm 8-lead DFN and 8-lead MSOP packages.ApplicationsVFD Bias SuppliesTFT-LCD Bias SuppliesGPS ReceiversDSL ModemsLocal Power Supply