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.
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