LTC3642
PRODUCTIONHigh Efficiency, High Voltage 50mA Synchronous Step-Down Converter
- Part Models
- 24
- 1ku List Price
- Starting From $4.04
Overview
- Wide Input Voltage Range: 4.5V to 45V
- Tolerant of 60V Input Transients
- Internal High Side and Low Side Power Switches
- No Compensation Required
- 50mA Output Current
- Low Dropout Operation: 100% Duty Cycle
- Low Quiescent Current: 12μA
- 0.8V Feedback Voltage Reference
- Adjustable Peak Current Limit
- Internal and External Soft-Start
- Precise RUN Pin Threshold with Adjustable Hysteresis
- 3.3V, 5V and Adjustable Output Versions
- Only Three External Components Required for Fixed Output Versions
- Low Profile (0.75mm) 3mm × 3mm DFN and Thermally-Enhanced MS8E Packages
The LTC3642 is a high efficiency, high voltage step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current at no load while maintaining output voltage regulation.
The LTC3642 can supply up to 50mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. The LTC3642’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.
With its wide 4.5V to 45V input range and internal overvoltage monitor capable of protecting the part through 60V surges, the LTC3642 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3642 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.
The LTC3642 is available in the thermally enhanced 3mm × 3mm DFN and MS8E packages.
Applications
- 4mA to 20mA Current Loops
- Industrial Control Supplies
- Distributed Power Systems
- Portable Instruments
- Battery-Operated Devices
- Automotive Power Systems
Documentation
Data Sheet 1
User Guide 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 Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 28, 2021 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
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| LTC3642EDD#PBF | PRODUCTION | |
| LTC3642EDD#TRPBF | PRODUCTION | |
| LTC3642EDD-3.3#PBF | PRODUCTION | |
| LTC3642EDD-3.3#TRPBF | PRODUCTION | |
| LTC3642EMS8E#PBF | PRODUCTION | |
| LTC3642EMS8E#TRPBF | PRODUCTION | |
| LTC3642EMS8E-3.3#PBF | PRODUCTION | |
| LTC3642EMS8E-3.3#TRPBF | PRODUCTION | |
| LTC3642IDD#PBF | PRODUCTION | |
| LTC3642IDD#TRPBF | PRODUCTION | |
| LTC3642IDD-3.3#PBF | PRODUCTION | |
| LTC3642IDD-3.3#TRPBF | PRODUCTION | |
| LTC3642IMS8E#PBF | PRODUCTION | |
| LTC3642IMS8E#TRPBF | PRODUCTION | |
| LTC3642IMS8E-3.3#PBF | PRODUCTION | |
| LTC3642IMS8E-3.3#TRPBF | PRODUCTION | |
|
Nov 8, 2021 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
||
| LTC3642EDD-5#PBF | PRODUCTION | |
| LTC3642EDD-5#TRPBF | PRODUCTION | |
| LTC3642EMS8E-5#PBF | PRODUCTION | |
| LTC3642EMS8E-5#TRPBF | PRODUCTION | |
| LTC3642IDD-5#PBF | PRODUCTION | |
| LTC3642IDD-5#TRPBF | PRODUCTION | |
| LTC3642IMS8E-5#PBF | PRODUCTION | |
| LTC3642IMS8E-5#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
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| LTC3642EMS8E#PBF | PRODUCTION | |
| LTC3642EMS8E#TRPBF | PRODUCTION | |
| LTC3642EMS8E-3.3#PBF | PRODUCTION | |
| LTC3642EMS8E-3.3#TRPBF | PRODUCTION | |
| LTC3642EMS8E-5#PBF | PRODUCTION | |
| LTC3642EMS8E-5#TRPBF | PRODUCTION | |
| LTC3642IMS8E#PBF | PRODUCTION | |
| LTC3642IMS8E#TRPBF | PRODUCTION | |
| LTC3642IMS8E-3.3#PBF | PRODUCTION | |
| LTC3642IMS8E-3.3#TRPBF | PRODUCTION | |
| LTC3642IMS8E-5#PBF | PRODUCTION | |
| LTC3642IMS8E-5#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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Ideal Diodes and PowerPath Controllers 2 | ||
| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
| LTC2955 | RECOMMENDED FOR NEW DESIGNS | Pushbutton On/Off Controller with Automatic Turn-On |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3642
- LTC3642-3.3
- LTC3642-5
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
LTC3642EDD Demo Board | 60V Transients, 4.5V ≤ VIN ≤ 45V, VOUT = 1.8V/3.3V/5V/Adjustable @ 50mA