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LM27213 Datasheet(PDF) 1 Page - Texas Instruments |
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LM27213 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page LM27213 www.ti.com SNVS377A – FEBRUARY 2006 – REVISED MARCH 2013 LM27213 Single Phase Hysteretic Buck Controller Check for Samples: LM27213 1 FEATURES DESCRIPTION The LM27213 is a single-phase synchronous buck 2 • Ideal Load and Line Transient Responses regulator controller designed to fully support a • 5V to 30V Input Range portable microprocessor. On-chip gate drive makes • On-Chip Gate Drive for a compact, single chip solution. Output currents in excess of 25 Amps are possible. • Convenient CLK_EN# Signal • Input Under-Voltage Lockout The IC employs a current mode hysteretic control mechanism. Inductor current is sensed through a low • High Light-Load Efficiency value sense resistor. • Adjustable Analog Soft Start The LM27213 will operate over an input voltage • Peak Current Limit range of 5V to 30V. The output voltage is • Over-Voltage Protection programmed through 6 Voltage Identification (VID) • Error Correction for Good Static Accuracy pins and ranges from 0.700V to 1.708V in 64 steps. • ±1% DAC Accuracy Over Temperature Since the error in the output voltage directly sets the inductor current, the dynamic response to a large, • Interfaces with the LM2647 System Supply fast load transient is close to a square wave. This is • Available in TSSOP or WQFN Packages optimal for mode transition requirements. Also, due to the intrinsic input voltage feedforward characteristic of APPLICATIONS hysteretic control, the line transient response is • Core Voltage Supply for Low Power excellent as well. Processors The IC provides cycle-by-cycle peak current limit, • Low Voltage High Current Buck Regulators over-voltage protection, and a power good signal. The LM27213 fully supports the Stop CPU and Sleep Benefits modes offered by some processors. When enabled, • Single Chip Core Power Solution the IC enters a power-saving “diode emulator” mode • Minimum Output Capacitance Required which helps prolong battery runtime for portable systems. • Low Cost, Compact Design The LM27213 also has a soft start feature for the external adjustment of soft start speed. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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