Integrated Circuits (ICs)

LT1111IS8

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Analog Devices

IC REG BUCK BST ADJ 1.5A 8SO

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Integrated Circuits (ICs)

LT1111IS8

Active

Analog Devices

IC REG BUCK BST ADJ 1.5A 8SO

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT1111IS8

Current - Output	1.5 A
Frequency - Switching	72 kHz
Function	Step-Down, Step-Up
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	105 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive or Negative
Output Type	Adjustable
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SO
Synchronous Rectifier	False
Topology	Boost, Buck
Voltage - Input (Max) [Max]	30 V
Voltage - Input (Min) [Min]	2 V
Voltage - Output (Max) [Max]	50 V
Voltage - Output (Min/Fixed)	1.25 V

LT1111 Series

Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

Part	Mounting Type	Voltage - Output (Max) [Max]	Topology	Supplier Device Package	Number of Outputs	Current - Output	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Function	Frequency - Switching	Voltage - Input (Min) [Min]	Output Type	Package / Case	Package / Case [y]	Package / Case [x]	Output Configuration	Voltage - Input (Max) [Max]	Output Type	Package / Case	Package / Case
Analog Devices LT1111IS8#PBF	Surface Mount	50 V	Boost Buck	8-SO	1	1.5 A	105 °C	-40 °C	1.25 V	Step-Down Step-Up	72 kHz	2 V	Adjustable	8-SOIC	3.9 mm	0.154 in	Positive or Negative	30 V
Analog Devices LT1111CS8-5#PBF	Surface Mount		Boost Buck	8-SO	1	1.5 A	70 °C	0 °C	5 V	Step-Down Step-Up	72 kHz	2 V		8-SOIC	3.9 mm	0.154 in	Positive or Negative	30 V	1.81 mOhm
Analog Devices LT1111CS8-5#TRPBF	Surface Mount		Boost Buck	8-SO	1	1.5 A	70 °C	0 °C	5 V	Step-Down Step-Up	72 kHz	2 V		8-SOIC	3.9 mm	0.154 in	Positive or Negative	30 V	1.81 mOhm
Analog Devices LT1111CN8-12#PBF	Through Hole		Boost Buck	8-PDIP	1	1.5 A	70 °C	0 °C	12 V	Step-Down Step-Up	72 kHz	2 V		8-DIP			Positive or Negative	30 V	1.81 mOhm	0.3 in	7.62 mm
Analog Devices LT1111IS8	Surface Mount	50 V	Boost Buck	8-SO	1	1.5 A	105 °C	-40 °C	1.25 V	Step-Down Step-Up	72 kHz	2 V	Adjustable	8-SOIC	3.9 mm	0.154 in	Positive or Negative	30 V
Analog Devices LT1111CS8-12#PBF	Surface Mount		Boost Buck	8-SO	1	1.5 A	70 °C	0 °C	12 V	Step-Down Step-Up	72 kHz	2 V		8-SOIC	3.9 mm	0.154 in	Positive or Negative	30 V	1.81 mOhm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 14.42
		10	$ 10.26
		25	$ 9.19
		100	$ 7.99
		250	$ 7.41
		500	$ 7.06
		1000	$ 6.90

Description

General part information

LT1111 Series

The LT1111 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1111 functions equally well in step-up, step-down, or inverting applications.The LT1111 oscillator is set at 72kHz, optimizing the device to work with off-the-shelf surface mount inductors. The device can deliver 5V at 100mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in step-down mode.Switch current limit can be programmed with a single resistor. An auxiliary open-collector gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit, or error amplifier.For input sources of less than 2V use the LT1110.Applications3V to 5V, 5V to 12V Converters9V to 5V, 12V to 5V ConvertersRemote ControlsPeripherals and Add-On CardsBattery Backup SuppliesUninterruptible SuppliesLaptop and Palmtop ComputersCellular TelephonesPortable InstrumentsFlash Memory VPP Generators

Documents

Technical documentation and resources