●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 is optimal for mode transition requirements. Also, due to the intrinsic input voltage feedforward characteristic of hysteretic control, the line transient response is excellent as well.
●The IC provides cycle-by-cycle peak current limit, over-voltage protection, and a power good signal. The LM27213 fully supports the Stop CPU and Sleep modes offered by some processors. When enabled, the IC enters a power-saving “diode emulator” mode which helps prolong battery runtime for portable systems.
●The LM27213 also has a soft start feature for the external adjustment of soft start speed.
● 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
●All trademarks are the property of their respective owners.
Part 3D Model
