LT1619
PRODUCTIONLow Voltage Current Mode PWM Controller
- Part Models
- 4
- 1ku List Price
- Starting From $3.21
Overview
- Wide VIN Range: 1.9V to 18V
- 300kHz Fixed Frequency Current Mode Control
- 1A Rail-to-Rail N-Channel MOSFET Driver
- Low 53mV Current Limit Threshold Voltage Improves Efficiency
- Implements Boost, SEPIC and Flyback Converters Requiring Low Side Power Transistors
- Internal Current Sense Amplifier with Leading Edge Blanking
- Up to 500kHz External Synchronization
- Burst Mode® Operation for High Efficiency at Light Load
- 140µA Quiescent Current
- 15µA Shutdown Current
- 8-Lead MSOP and SO Packages
The LT1619 is a fixed frequency PWM controller for implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input voltages ranging from 1.9V to 18V and is suitable for a variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver operates either from the input in the non-bootstrapped mode or from the output in bootstrapped operation. The driver is designed to drive a low side power transistor in boost, SEPIC, flyback and other topologies.
Converter efficiency is improved at heavy loads with a 53mV current sense voltage and at light load with Burst Mode operation. The operating frequency is internally setat 300kHz. The oscillator can also be synchronized externally up to 500kHz. No load quiescent current is 140µA and shutdown current is 15µA.
The LT1619 is available in 8-lead MSOP and SO packages.
Applications
- 3.3V to 5V DC/DC Converters
- Distributed Power Supplies
- Isolated Power Supplies
Documentation
Data Sheet 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1619EMS8#PBF | 8-Lead MSOP | ||
| LT1619EMS8#TRPBF | 8-Lead MSOP | ||
| LT1619ES8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1619ES8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT1619EMS8#PBF | PRODUCTION | |
| LT1619EMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT1619EMS8#PBF | PRODUCTION | |
| LT1619EMS8#TRPBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1619ES8#PBF | PRODUCTION | |
| LT1619ES8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1619ES8#PBF | PRODUCTION | |
| LT1619ES8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1619
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.