Specification	LT3570EUF#TRPBF

Frequency - Switching [Max]	2.1 MHz
Frequency - Switching [Min]	500 kHz
Mounting Type	Surface Mount
Number of Outputs	3
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Package / Case	24-WFQFN Exposed Pad
Supplier Device Package	24-QFN (4x4)
Topology	Step-Down (Buck) (1), Linear (LDO) (1), Step-Up (Boost) (1)
Voltage - Supply [Max]	36 V
Voltage - Supply [Min]	2.5 V
Voltage/Current - Output 1	1.5 A, 0.8 V
Voltage/Current - Output 2	1.5 A
Voltage/Current - Output 2 [Max]	0.8 V
Voltage/Current - Output 3	Controller
w/LED Driver	False
w/Sequencer	False
w/Supervisor	False

LT3570 Series

Part	Package / Case	Package / Case	Number of Outputs	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Frequency - Switching [Min]	Frequency - Switching [Max]	Voltage/Current - Output 3	Voltage/Current - Output 2 [Max]	Voltage/Current - Output 2	Voltage/Current - Output 1	Topology
Analog Devices Inc./Maxim Integrated LT3570IFE#PBF	20-TSSOP Exposed Pad	0.173 " 4.4 mm	3	20-TSSOP-EP	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570IUF#PBF	24-WFQFN Exposed Pad		3	24-QFN (4x4)	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570IUF#TRPBF	24-WFQFN Exposed Pad		3	24-QFN (4x4)	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570IFE#TRPBF	20-TSSOP Exposed Pad	0.173 " 4.4 mm	3	20-TSSOP-EP	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570EFE#TRPBF	20-TSSOP Exposed Pad	0.173 " 4.4 mm	3	20-TSSOP-EP	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570EUF#TRPBF	24-WFQFN Exposed Pad		3	24-QFN (4x4)	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570EUF#PBF	24-WFQFN Exposed Pad		3	24-QFN (4x4)	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)
Analog Devices Inc./Maxim Integrated LT3570EFE#PBF	20-TSSOP Exposed Pad	0.173 " 4.4 mm	3	20-TSSOP-EP	125 °C	-40 C	2.5 V	36 V	Surface Mount	500 kHz	2.1 MHz	Controller	0.8 V	1.5 A	0.8 V 1.5 A	Linear (LDO) (1) Step-Down (Buck) (1) Step-Up (Boost) (1)

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 4.42	1m+

Description

General part information

LT3570 Series

The LT3570 is a buck and boost converter with internal power switches and LDO controller. Each converter is designed with a 1.5A current limit and an input range from 2.5V to 36V, making the LT3570 ideal for a wide variety of applications. Switching frequencies up to 2.1MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock up to 2.75MHz.The LT3570 features a programmable soft-start function that limits the feedback voltage during start-up helping prevent overshoot and limiting inrush current. The LDO controller is capable of delivering up to 10mA of base current to an external NPN transistor.ApplicationsCable and Satellite Set-Top BoxesAutomotive SystemsTelecom Systems"Dying Gasp" SystemsTFT LCD Displays

Documents

Technical documentation and resources

R530 Reliability Data

Reliability Data

LT3570EUF#TRPBF | Datasheet

Datasheet