• Functional Safety-Capable
  • Documentation available to aid functional safety system design
• Input voltage range: 2.7 V to 6 V
• Output voltage from 0.6 V to 5.5 V
• 1% feedback voltage accuracy (full temperature range)
• T_J = –40°C to +150°C
• Family of 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) devices
• Switching frequency in PWM: 2.25 MHz
• External synchronization from 1.8 MHz to 4 MHz
• Forced PWM or PWM/PFM operation
• Quiescent current: 17 µA (typical)
• Adjustable soft start-up to 10 ms
• Precise ENABLE input allows:
  • User-defined undervoltage lockout
  • Exact sequencing
• 100% duty cycle mode
• Active output discharge
• Power-good output with window comparator
• For device options with selectable compensation, see the TPS628501

• Motor drives
• Factory automation and control
• Building automation
• Test and measurement
• Multi-function printer (MFP)
• General purpose POL

The TPS62851x is a family of pin-to-pin 0.5-A, 1-A, 2-A (continuous), and 3-A (peak) high efficiency, easy-to-use, synchronous step-down DC/DC converters. They are based on a peak current mode control topology. Low resistive switches allow up to 2-A continuous output current and 3-A peak current. The switching frequency is internally fixed at 2.25 MHz and can also be synchronized to an external clock in the range from 1.8 MHz to 4 MHz. In PWM/PFM mode, the TPS62851x automatically enters power save mode at light loads to maintain high efficiency across the whole load range. The TPS62851x provide a 1% output voltage accuracy in PWM mode, which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or tracking the output voltage to an external source, which allows external sequencing of different supply rails and limits the inrush current during start-up.

The TPS62851xis available in an 8-pin 1.60-mm × 2.10-mm SOT583 package, offering a high power density solution.