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Data sheet
A newer version of this product is available
This product continues to be available for existing customers. New designs should consider an alternate product.
LM73606
- New product available: LM61460 60-V, 6-A synchronous converter
- Synchronous rectification
- Wettable flanks QFN package (WQFN)
- Low quiescent current
- 0.8 µA in shutdown (typical)
- 15 µA in active mode with no load (typical)
- Wide voltage conversion range:
- tON-MIN = 60 ns (typical)
- tOFF-MIN = 70 ns (typical)
- Low MOSFET ON-resistance:
- RDS_ON_HS = 53 mΩ (typical)
- RDS_ON_LS = 31 mΩ (typical)
- External bias input to improve efficiency
- Pin-selectable auto mode or forced PWM operation
- Adjustable frequency range: 350 kHz to 2.2 MHz
- Synchronizable to external clock
- Internal compensation
- Power-good flag
- Precision enable to program system UVLO
- Flexible soft-start features:
- Start-up into pre-biased load
- Fixed or adjustable soft-start time
- Output voltage tracking
- Cycle-by-cycle current limiting
- Short-circuit protection with hiccup mode
- Create a custom design with the WEBENCH® power designer using LM73605 or LM73606
The LM73605 and LM73606 family of devices are easy-to-use synchronous step-down DC/DC converters capable of driving up to 5 A or 6 A of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605 and LM73606 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load improves efficiency over the entire load range. Protection features include thermal shutdown, cycle-by-cycle current limiting, and short-circuit protection. The devices are pin-to-pin compatible for easy current scaling. The new product, LM61460-Q1, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare specifications. Start a Webench design with LM61460-Q1. Use the LMZM33606 module for faster time to market.
Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM73605/LM73606 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet (Rev. A) | PDF | HTML | 21 Jul 2017 |
| Functional safety information | LM73606 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 12 Jul 2022 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 Apr 2021 | ||
| Test report | Automotive Wide-VIN to Point-of-Load Power Supply Reference Design (Rev. A) | 26 Mar 2020 | ||
| White paper | Power modules for lab instrumentation | 18 Oct 2018 | ||
| EVM User's guide | LM73605/LM73606 EVM User's Guide | 20 Sep 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM73606EVM-5V-400K — LM73606 Synchronous Step-Down Converter Evaluation Module
The LM73606EVM-5V-400K evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM73606 synchronous step-down voltage converter. The EVM operates from 6V to 36V input and provides a 5V output voltage with 6A maximum load current.
User guide: PDF
Simulation model
LM73606 Non-Inverting and Inverting PSpice Transient Model
SNVMBE5.ZIP (240 KB) - PSpice Model
Simulation model
LM73606 Unencrypted Non-Inverting and Inverting PSpice Transient Model
SNVMBE4.ZIP (8 KB) - PSpice Model
Reference designs
PMP15023 — Automotive wide-VIN to point-of-load power supply with front-end circuit protection reference design
This automotive point-of-load power supply reference design features complete front-end protection in a small overall solution size. The system can clamp fast high-voltage electrical transients and maintain operation through these events. It can also properly respond to a reverse battery polarity (...)
Reference designs
TIDA-010011 — High efficiency power supply architecture reference design for protection relay processor module
This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
Reference designs
PMP40286 — Automotive USB Type-C™ DFP 5V 3A + USB Type-A 5V 2.4A Charger Reference Design
PMP40286 is a dual port car charger reference design. The output goes to a 5V 3A USB Type-C™ port and a 5V 2.4A USB type-A port. The USB Type-C port can be backwards compliant with BC1.2 and DCP configurations. The type-A port is capable of compensating for the effects on voltage droop (...)
Reference designs
PMP40285 — Automotive Dual Port USB Type-C™ DFP 5V 3A Charger Reference Design
PMP40285 is a dual port USB Type-C™ charger reference design. This design takes an automotive input voltage, the output goes to two USB Type-C port. Each of these ports supplies 5V 3A for USB Type-C™ device. The design is fully compliant with USB type C and backwards compliant with (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RNP) | 30 | Ultra Librarian |
Ordering & quality
Information included:
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- REACH
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- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Support & training
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