LM22678 - 具有精密启用的 5A SIMPLE SWITCHER，降压电压稳压器

LM22678是TI德州仪器公司的一款转换器（集成开关）产品，LM22678是具有精密启用的 5A SIMPLE SWITCHER，降压电压稳压器，本站介绍了LM22678的封装应用图解、特点和优点、功能等，并给出了与LM22678相关的TI元器件型号供参考。

LM22678 - 具有精密启用的 5A SIMPLE SWITCHER，降压电压稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable With Low ESR Ceramic Capacitors
100-mΩ N-Channel MOSFET
Output Voltage Options: -ADJ (Outputs as Low as 1.285 V) -5.0 (Output Fixed to 5 V)
±1.5% Feedback Reference Accuracy
Switching Frequency of 500 kHz
–40°C to 125°C Operating Junction Temperature Range
Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH® Enabled
LM22678-Q1 is an Automotive-Grade Product that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
PFM (Exposed Pad) Package

产品应用

Industrial Control
Telecom and Datacom Systems
Embedded Systems
Conversions from Standard 24-V, 12-V and 5-V Input Rails

产品说明

The LM22678 switching regulator provides all of the functions necessary to implement an efficient high-voltage step-down (buck) regulator using a minimum of external components. This easy-to-use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 5 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5-V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22678 device is a member of Texas Instruments' SIMPLE SWITCHER® family. The SIMPLE SWITCHER concept provides for an easy-to-use complete design using a minimum number of external components and the TI WEBENCH design tool. TI's WEBENCH tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM22678	TO-263 (7)	10.16 mm x 9.85 mm
LM22678-Q1	TO-263 (7)	10.16 mm x 9.85 mm

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