Calculation tool
Data sheet
TPS56121
- 4.5-V to 14-V Input Voltage Range
- Incorporates Power Block Technology
- Up to 15-A Output Current
- Fixed-Frequency Options of 300 kHz, 500 kHz,
and 1 MHz - High-Side and Low-Side MOSFET RDS(on) Sensing
- Programmable Soft-Start
- 600-mV Reference Voltage With 1% Accuracy
- Voltage Mode Control with Feed-Forward
- Supports Prebiased Output
- Thermal Shutdown
- 22-Pin 5-mm × 6-mm PQFN PowerPAD™ Package
- For SWIFT Power Products Documentation,
see http://www.ti.com/swift
The TPS56121 device is a high-efficiency and high-current synchronous buck converter designed to operate from a supply of 4.5 V to 14 V. The device can produce an output voltage as low as 0.6 V at loads up to 15 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use.
The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change.
The TPS56121 is available in a thermally enhanced 22-pin PQFN (DQP) PowerPAD package.
The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground. During the initial power-on sequence, the device enters a calibration cycle, measures the voltage at the ILIM pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition and then enters a shutdown/restart cycle until the fault is removed.
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Technical documentation
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View all 15 Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
AFE7422EVM — AFE7422 dual-channel RF-sampling AFE with 14-bit 9-GSPS DAC and 3-GSPS ADC evaluation module
The AFE7422 evaluation module (EVM) is an RF-sampling transceiver platform that can be configured to support up to two-transmit and two-receive (2T2R) channels simultaneously. The module evaluates the AFE7422 device, which is a dual-channel RF-sampling analog front end (...)
User guide: PDF
Evaluation board
AFE7444EVM — AFE7444 quad-channel RF-sampling AFE with 14-bit 9-GSPS DAC and 3-GSPS ADC evaluation module
The AFE7444 evaluation module (EVM) is an RF-sampling transceiver platform that can be configured to support up to four-transmit and four-receive (4T4R) channels simultaneously. The module evaluates the AFE7444 device, which is a quad-channel RF-sampling analog front end (...)
User guide: PDF
Evaluation board
TPS56121EVM-601 — Evaluation Module for TPS56121 High Current (15A) Synchronous Step-Down SWIFT™ Converter
The Texas Instruments TPS56121EVM-601 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS56121 4.5V to 14V Input, 15A High Current Synchronous Step-Down Converter. The EVM is designed to use a regulated 12V (8V to 14V) bus voltage to provide a regulated 1.0-V (...)
Simulation model
TPS56121 TINA TI Start-Up Reference Design
SLUM143.TSC (900 KB) - TINA-TI Reference Design
Simulation model
TPS56121 TINA-TI Average Reference Design
SLUM280.TSC (1202 KB) - TINA-TI Reference Design
Simulation model
TPS56121 TINA-TI Steady State Reference Design
SLUM144.TSC (900 KB) - TINA-TI Reference Design
Simulation model
TPS56121 Unencrypted PSpice Transient Model Package (Rev. A)
SLUM139A.ZIP (100 KB) - PSpice Model
Simulation model
TPS56121/221 Unencrypted PSpice Average Model Package (Rev. A)
SLUM235A.ZIP (449 KB) - PSpice Model
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
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 (...)
Reference designs
PMP6776 — Xilinx Kintex FPGA Power Reference Design
PMP6776 is a low-cost non-isolated synchronous buck power supply. This design uses TPS56121 and TPS54620 Synchronous Buck Converters and TPS54425 and TPS54225 Step-Down Switchers to generate 7 outputs. Features include input voltage range 10.8V to 13.2V and outputs 1V at 6A, 1.5V at 4A, 1.8V at 6A, (...)
| Package | Pins | Download |
|---|---|---|
| LSON-CLIP (DQP) | 22 | View options |
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