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Power management
3-V to 36-V, 6-A, Low-EMI synchronous step-down converter
Data sheet
- document-pdfAcrobat LM61460 3-V to 36-V, 6-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. D) PDF | HTML
LM61460
Product details
- Functional Safety-Capable
- Documentation available to aid functional safety system design
- Optimized for ultra low EMI requirements
- Hotrod™ package and parallel input path minimize switch node ringing
- Adjustable SW node rise time
- Designed for reliable and rugged applications
- Supports 42-V transients
- ±1% total output regulation accuracy
- VOUT adjustable from 1 V to 95% of VIN
- 0.4-V dropout with 4-A load (typical)
- Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-citcuit protection
- High efficiency power conversion at all loads
- 7-µA no load current at 13.5 VIN, 3.3 VOUT
- 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
- Low MOSFET ON resistance
- RDS_ON_HS = 41 mΩ (typical)
- RDS_ON_LS = 21 mΩ (typical)
- External bias option for improved efficiency
- Suitable for scalable power supplies
- Pin compatible with:
- LM61440-Q1 (36 V, 4 A, adjustable fSW)
- LM61440 (36 V, 4 A, adjustable fSW)
- LMQ61460 (36 V, 6 A, internal caps)
- Pin compatible with:
- Use TPSM63606 module for faster time to market
- Functional Safety-Capable
- Documentation available to aid functional safety system design
- Optimized for ultra low EMI requirements
- Hotrod™ package and parallel input path minimize switch node ringing
- Adjustable SW node rise time
- Designed for reliable and rugged applications
- Supports 42-V transients
- ±1% total output regulation accuracy
- VOUT adjustable from 1 V to 95% of VIN
- 0.4-V dropout with 4-A load (typical)
- Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-citcuit protection
- High efficiency power conversion at all loads
- 7-µA no load current at 13.5 VIN, 3.3 VOUT
- 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
- Low MOSFET ON resistance
- RDS_ON_HS = 41 mΩ (typical)
- RDS_ON_LS = 21 mΩ (typical)
- External bias option for improved efficiency
- Suitable for scalable power supplies
- Pin compatible with:
- LM61440-Q1 (36 V, 4 A, adjustable fSW)
- LM61440 (36 V, 4 A, adjustable fSW)
- LMQ61460 (36 V, 6 A, internal caps)
- Pin compatible with:
- Use TPSM63606 module for faster time to market
The LM61460 is a high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61460 implements soft recovery from dropout eliminating overshoot on the output.
The LM61460 is specifically designed for minimal EMI. The device incorporates adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.
Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.
Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
The LM61460 is a high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61460 implements soft recovery from dropout eliminating overshoot on the output.
The LM61460 is specifically designed for minimal EMI. The device incorporates adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.
Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.
Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
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Technical documentation
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View all 8Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | LM61460 3-V to 36-V, 6-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. D) | PDF | HTML | 28 Jul 2022 |
White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 30 Apr 2024 | |
Application note | How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck | PDF | HTML | 16 Aug 2023 | |
Application note | Using the LM61460-Q1 and LM61495-Q1 in USB Type-C Applications | PDF | HTML | 15 Dec 2021 | |
EVM User's guide | LM61460-Q1 EVM User's Guide (Rev. D) | PDF | HTML | 30 Jul 2021 | |
Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 Apr 2021 | ||
Functional safety information | LM61x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 08 Oct 2020 | |
Technical article | Keeping the brain cool: how to use high-power DC/DCs in single-board computer desi | PDF | HTML | 28 Feb 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM61460EVM — 36-V, low EMI 6-A, 5-V synchronous, 400-kHz, step-down converter evaluation module
The LM61460 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM61460 synchronous step-down converter. The LM61460 provides exceptional efficiency, low IQ, and low EMI in small solution size.
User guide: PDF | HTML
Calculation tool
SNVR479 — LM61460 Design Tool
Supported products & hardware
Products
AC/DC & DC/DC converters (integrated FET)
PCB layout
LM61460 EVM Design Files
SNVR478.ZIP (5000 KB)
Reference designs
PMP22416 — USB Type-C® dual-buck reference design
This reference design is a USB Type-C® dual-output buck with 65-W output power and 98.8% efficiency. The design uses two LM61460 buck converters to step down a 21-V input and includes a 5-V bias voltage input to maximize efficiency. The USB Type-C design offers dual-output voltages of 5 V, 9 V, 15 (...)
Test report: PDF
Schematic: PDF
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN-HR (RJR) | 14 | Ultra Librarian |
TI's Standard Terms and Conditions for Evaluation Items apply.
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