LM27213 - 单相滞后降压控制器

LM27213是TI德州仪器公司的一款控制器（外部开关）产品，LM27213是单相滞后降压控制器，本站介绍了LM27213的封装应用图解、特点和优点、功能等，并给出了与LM27213相关的TI元器件型号供参考。

LM27213 - 单相滞后降压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

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.

产品特性

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

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