A General Introduction to TPS40140RHHT Synchronous Buck Controller

TPS40140RHHT Pinout

Symbol

TPS40140RHHT Symbol

Footprint

TPS40140RHHT Footprint

3D Model

TPS40140RHHT 3D Model

The TPS40140RHHT  is a multi-functional synchronous buck controller that can be configured to provide either a single-output two-phase power supply or a power supply that supports two independent outputs. Several TPS40140RHHT   controllers can be stacked up to a 16-phase multi-phase single output power supply. Alternatively, several controllers providing multiple independent outputs can be synchronized in an interleaving pattern for improved input ripple current.
The TPS40140RHHT  is capable of converting from a 15-V input to a 0.7-V output at 1MHz.

●VDD From 4.5 V to 15 V, With Internal 5-V Regulator
●VourFrom0.7Vto5.8V
●Converts From 15-V Input to 0.7-V Output at 1 MHz
●Dual-Output or 2-Phase Interleaved Operation, Stackable to 16 Phases
●Supports Pre-Biased Outputs Programmable Switching Frequency Up to 1 MHz/Phase

●0.5% Internally Trimmed 0.7-V Reference

●10-μA Shutdown Current

●Current Mode Control with Forced Current Sharing (1)

●1-V to 40-V Power Stage Operation Range

●Power Sharing from Different Input Voltage Rails, (e.g. Master From 5 V, Slave From 12 V)

●True Remote Sensing Differential Amplifier

●Programmable Input Undervoltage Lockout

●Resistive or Inductor DCR Current Sensing

●Provide a 6-Bit Digitally-Controlled Output When Used With TPS40120

●36-pin QFN Package

The TPS40140RHHT operates with a programmable fixed switching frequency. It is a current feedback controller with forced phase current balancing. When compared to voltage mode control, the current feedback controller results in a simplified feedback network and reduced input line sensitivity. Phase current is sensed by using either the DCR (direct current resistance) of the filter inductors or current sense resistors installed in series with the output. See the section on INDUCTOR DCR CURRENT SENSE. The current signal is then amplified and superimposed on the amplified voltage error signal to provide current mode  PWM  control.
Other features include a programmable input under-voltage lockout (UVLO), differential input amplifier for precise output regulation, user-programmable operation frequency, programmable pulse-by-pulse overcurrent protection, and output under-voltage shutdown and re-start, capacitor to set soft-start time and power good indicators.

The functional block diagram of TPS40140RHHT is shown below:

TPS40140RHHT Functional Diagram

The following figures show the application circuits of  TPS40140RHHT:

TPS40140RHHT Simplified Application Circuit

TPS40140RHHT Functional Diagram

TPS40140RHHT Typical Applications Circuit, Dual Mode