SIMPLE SWITCHER® 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package
Product details
Parameters
Package | Pins | Size
Features
- Functional Safety-Capable
- Configured for rugged industrial applications
- Input voltage range: 3.8 V to 36 V
- Output voltage range: 1 V to 24 V
- Peak-current mode control
- Junction temperature range: –40°C to +125°C
- Ease-of-use SOIC package
- Well-suited for scalable industrial power supplies
- High-efficiency solution
- Peak efficiency > 95%
- Low shutdown quiescent current of 5 µA
- Low operating quiescent current of 24 µA
- Flexible system interface
- Power-good flag and precision enable
- Create a custom design using the LMR33640 with the WEBENCH Power Designer
- Use TPSM53604 module for faster time to market
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Description
The LMR33640 SIMPLE SWITCHER regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33640 drives up to 4 A of load current from an input of up to 36 V. The LMR33640 provides high light-load efficiency and output accuracy. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33640 is pin-to-pin compatible with the LMR33610, LMR33620, LMR33630 (36 V, 1 A/2, A/3 A), LMR36510 (65 V, 1 A), and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33640 is available in an 8-pin HSOIC package.
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LMR33640 SIMPLE SWITCHER 3.8-V to 36-V, 4-A Synchronous Step-down Converter datasheet (Rev. C) | Nov. 24, 2020 |
Functional safety information | LMR336x0 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A) | Mar. 02, 2021 | |
Application note | Working with Inverting Buck-Boost Converters (Rev. A) | May 14, 2020 | |
Technical article | 3 tips when designing a power stage for servo and AC drives | Nov. 20, 2019 | |
User guide | LMR33640EVM User's Guide | Nov. 01, 2019 | |
Technical article | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 | |
Technical article | How to increase system reliability and simplify design using DC/DC converters | Jun. 13, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Integrated synchronous rectification
- Low operating quiescent current
- High light load efficiency
- Short minimum on-time
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SO PowerPAD (DDA) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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