LT1618

PRODUCTION

Constant-Current/Constant-Voltage 1.4MHz Step-Up DC/DC Converter

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Part Models
4
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Part Details

  • Accurate Input/Output Current Control: ±5% Over Temperature
  • Accurate Output Voltage Control: ±1%
  • Wide VIN Range: 1.6V to 18V
  • 1.4MHz Switching Frequency
  • High Output Voltage: Up to 35V
  • Low VCESAT Switch: 200mV at 1A
  • Available in (3mm x 3mm x 0.8mm) 10-Pin DFN and 10-Pin MSOP Packages
LT1618
Constant-Current/Constant-Voltage 1.4MHz Step-Up DC/DC Converter
USB to 12V Boost Converter (with Selectable 100mA/500mA Input Current Limit) Efficiency Curve Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 4

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Analog Temperature Sensors 1
LTC2997
PRODUCTION Remote/Internal Temperature Sensor
TimerBlox 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT1618
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC780B

LT1618 Demo Board | CC/CV Boost, 3.3V ≤ VIN ≤ 4.2V, VOUT = 12V@250mA(CV) or 3.5V@500mA(CC)

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Product Details

Demonstration circuit 780B is a Constant-Current Constant- Voltage 1.4MHz Step-up DC/DC Converter featuring the LT1618. DC780B demonstrates a general purpose Boost converter with a 12V, 250mA output from a 3.3V-4.2V source.


The demo board can also be used as an LED driver, where a Luxeon LED (not installed), is driven with a regulated current of 500mA (default current), at a forward voltage of 3.5V. By changing the value or R4 to 2.2M the LED current can be regulated at 250mA.


The LT1618 can be used for wider input voltages, but output voltage level and component selection restrict this demo circuit to Lithium Ion battery input levels.
DC780B
LT1618 Demo Board | CC/CV Boost, 3.3V ≤ VIN ≤ 4.2V, VOUT = 12V@250mA(CV) or 3.5V@500mA(CC)
DC780B-2 DC780B-4 DC780B-1 DC780B-3 DC780B Schematic Image

Latest Discussions

4 Years Ago
RE: LT1618 Constant Current Source
5 Years Ago
RE: LT1618 - Wide input range with a fixed 3.3V output
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