Linear Technology LT1618 Constant-Current Constant-Voltage 1.4MHz Step-Up DC-DC Converter Manual
Summary
This high-efficiency step-up DC/DC converter solution provides precise constant-current and constant-voltage output control across a wide 1.6V to 18V input range. Ideal for engineers designing complex power systems like LED drivers, USB boost converters, or battery chargers. The manual details the converter's key features, including high switching frequency (1.4MHz) and supports demanding applications requiring stable current/voltage regulation.
Page 1 Text Content
LT1618
Constant-Current/ Constant-Voltage 1.4MHz
Step-Up DC/DC Converter
FEATURES DESCRIPTIO Accurate Input/Output Current Control: ±5% Over The LT®1618 step-up DC/DC converter combines a tradi- Temperature tional voltage feedback loop and a unique current feedback
Accurate Output Voltage Control: ±1% loop to operate as a constant-current, constant-voltage Wide VIN Range: 1.6V to 18V source. This fixed frequency, current mode switcher oper- 1.4MHz Switching Frequency ates from a wide input voltage range of 1.6V to 18V, and High Output Voltage: Up to 35V the high switching frequency of 1.4MHz permits the use of Low VCESAT Switch: 200m V at 1A tiny, low profile inductors and capacitors. The current Available in (3mm × 3mm × 0.8mm) 10-Pin DFN and sense voltage is set at 50m V and can be adjusted using the 10-Pin MSOP Packages IADJ pin. Available in the 10-Pin (3mm × 3mm) Exposed Pad DFN
APPLICATIO S
and 10-pin MSOP packages, the LT1618 provides a com- plete solution for constant-current applications.■
LED Backlight Drivers
EF FI CI EN CY
USB Powered Boost/SEPIC Converters , LTC and LT are registered trademarks of Linear Technology Corporation.
Input Current Limited Boost/SEPIC Converters Battery Chargers
TYPICAL APPLICATIO
USB to 12V Boost Converter
(with Selectable 100m A/500m A Input Current Limit)
0.1Ω 10µH Efficiency Curve
VIN VOUT 5V 12V
C1 SWISN
ISP 909k LT1618
VIN FB
SHDN R2
OFF ON
0V IADJ
GND VC
LOAD CURRENT (m A)
C1: TAIYO YUDEN JMK212BJ475 1618 TA01a
1618 TA01b
C2: TAIYO YUDEN EMK316BJ475 D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CR43-100
sn1618 1618fas
Page Summary Contents For Linear Technology LT1618 Constant-Current Constant-Voltage 1.4MHz Step-Up DC-DC Converter Manual
Manual Details
| Brand | Current |
|---|---|
| Pages | 16 |
| File Size | 205.95 KB |
| Published | May 28, 2026 |
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Frequently Asked Questions
What input voltage range can the LT1618 handle?
The unit operates from a wide input voltage range of 1.6V to 18V.
Does it support constant current or constant voltage?
It combines traditional voltage and unique current feedback, allowing operation as both a constant-current and constant-voltage converter.
What is the maximum switching frequency?
The fixed switching frequency of this unit is 1.4MHz.
Is installation complex for different applications?
It provides solutions for LED Backlight Drivers, USB Boost/SEPIC Converters, Input Current Limited Boost/SEPIC Converters, and Battery Chargers.