4.5 V to 18 V, 35 A, 2X stackable synchronous buck converter with PMBus™ and telemetry
Product details
Parameters
Package | Pins | Size
Features
- PMBus™ 1.3 Compliant Converters: 35 A
- 2-Device Stackable for up to 70 A With Current Sharing
- Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.35 V to 5.5 V
- Integrated 3.2-mΩ and 1.4-mΩ Stacked NexFET™ Power Stage
- 350-mV to 1650-mV Reference for Adaptive Voltage Scaling (AVS) Function and Margining through PMBus
- 0.5% Reference Accuracy at 600 mV and Above
- Lossless Low-Side MOSFET Current Sensing
- Voltage Mode Control With Input Feed-Forward
- Differential Remote Sensing
- Monotonic Start-Up into Pre-Biased Output
- Output Voltage and Output Current Reporting
- Internal Die Temperature Monitoring
- 64 Programmable PMBus Addresses via ADDR0 and ADDR1 Pins
- Programmable via the PMBus Interface:
- OCP, UVLO, Soft-Start, PG, OV, UV, OT Levels, Fault Responses
- Turnon and Turnoff Delays
- Thermal Shutdown
- Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
- Frequency Synchronization to an External Clock or Output Clock to Sync Out
- Create a Custom Design Using the TPS546C23 With the WEBENCH® Power Designer
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Description
The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC/DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 7-mm × 5-mm package. Two TPS546C23 devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. High-frequency, low-loss switching, provided by an integrated NexFET power stage and optimized drivers, allows for very high-density power solutions. The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.
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Technical documentation
= Top documentation for this product selected by TI
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The TPS546C23EVM1-PWR746 evaluation module (EVM) uses the TPS546C23. The TPS546C23 is a voltage mode, 35A synchronous Buck converter with integrated MOSFETs. Two seperated converters are included on the EVM, both providing a 0.9V output at up to 35A from a 12V input bus.
Features
- Two seperated PMBUS-Enabled BUCK converters. 35A DC steady state Ouput current from each converter.
- ±0.5% 0.6VREF Tolerance Over -40 to 125°C Junction Temperature
- 0.35V to 1.65V Adjustable VREF for AVS and Margining through PMBUS
- True Differential Remote Sense Amplifier
- Programmable OCP, UVLO, OV, UV, OT (...)
TPS546C23EVM2-746
Description
The TPS546C23EVM2-746 evaluation module (EVM) uses two TPS546C23 devices. The TPS546C23 is a voltage mode, 35A synchronous buck converter with integrated MOSFETs. Two phase converters on the EVM provides a 1.2V output at up to 70A from a 12V input bus.
Features
- Two phase interleaving PMBUS-Enabled BUCK converters. 70A DC steady state Ouput current.
- ±0.5% 0.6VREF Tolerance Over -40 to 125°C Junction Temperature
- 0.35V to 1.65V Adjustable VREF for AVS and Marginnig through PMBUS
- True Differential Remote Sense Amplifier
- Programmable OCP, UVLO, OV, UV, OT thresholds (...)
Design tools & simulation
SLUM531.ZIP (289 KB) - PSpice Model
SLUM706.ZIP (53 KB) - IBIS Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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
- (...)
Reference designs
PMP20490 — The TPS546C23 provides a single IC for both control & the synchronous power stage for high current DC/DC applications and allows doubling of the current capability with use of two of the same part. Multi-phase also allows output ripple cancellation and effective higher bandwidth control (...)
Design files
-
download PMP20292 Gerber.zip (607KB) -
download PMP20490 BOM.pdf (107KB) -
download PMP20490 Assembly Drawing (PMP20292).pdf (245KB) -
download PMP20490 PCB (PMP20292).pdf (2682KB) -
download PMP20490 CAD Files.zip (896KB) -
download PMP20490 Gerber.zip (594KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| LQFN-CLIP (RVF) | 40 | View options |
Ordering & quality
Support & training
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