LM27213

LM27213 www.ti.com SNVS377A – FEBRUARY 2006 – REVISED MARCH 2013 LM27213 Single Phase Hysteretic Buck Controller Check for Samples: LM27213 FEATURES 1 2 Ideal Load and Line Transient Responses 5V to 30V Input Range On-Chip Gate Drive Convenient CLK_EN# Signal Input Under-Voltage Lockout High Light-Load Efficiency Adjustable Analog Soft Start Peak Current Limit Over-Voltage Protection Error Correction for Good Static Accuracy ±1% DAC Accuracy Over Temperature Interfaces with the LM2647 System Supply Available in TSSOP or WQFN Packages APPLICATIONS Core Voltage Supply for Low Power Processors Low Voltage High Current Buck Regulators Benefits Single Chip Core Power Solution Minimum Output Capacitance Required Low Cost, Compact Design DESCRIPTION The LM27213 is a single-phase synchronous buck regulator controller designed to fully support a portable microprocessor. On-chip gate drive makes for a compact, single chip solution. Output currents in excess of 25 Amps are possible. The IC employs a current mode hysteretic control mechanism. Inductor current is sensed through a low value sense resistor. The LM27213 will operate over an input voltage range of 5V to 30V. The output voltage is programmed through 6 Voltage Identification (VID) pins and ranges from 0.700V to 1.708V in 64 steps. Since the error in the output voltage directly sets the inductor current, the dynamic response to a large, fast load transient is close to a square wave. This i...