• VDD from 4.5 to 15 V, With Internal 5-V Regulator
• VOUT from 0.7 V to 5.8 V
• 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 Prebiased 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- to 40-V Power Stage Operation Range
• Power Sharing From Different Input Voltage Rails, (for Example, Master From 5 V, Slave From 12 V)
• True Remote Sensing Differential Amplifier
• Programmable Input Undervoltage Lockout (UVLO)
• Resistive or Inductor DCR Current Sensing
• Provide a 6-Bit Digitally Controlled Output When Used With TPS40120
• 36-Pin VQFN Package

• Graphic Cards
• Internet Servers
• Networking Equipment
• Telecommunications Equipment
• DC Power Distributed Systems

The TPS40140 is a multifunctional synchronous buck controller that can be configured to provide either a single-output 2-phase power supply or a power supply that supports two independent outputs. Several TPS40140 controllers can be stacked up to a 16-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 TPS40140 can convert from a 15-V input to a 0.7-V output at 1 MHz.

Each phase operates at a switching frequency of up to 1 MHz. The two phases in one device operate 180° out-of-phase. In a multiple-device stackable configuration, the phase shift of the slaves, relative to a master, is programmable.