LM25118 - Wide Voltage Range Buck-Boost Controller

LM25118是TI德州仪器公司的一款控制器（外部开关）产品，LM25118是Wide Voltage Range Buck-Boost Controller，本站介绍了LM25118的封装应用图解、特点和优点、功能等，并给出了与LM25118相关的TI元器件型号供参考。

LM25118 - Wide Voltage Range Buck-Boost Controller - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM25118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high performance, cost efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially suitable for automotive applications. The LM25118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy to use controller includes drivers for the high side buck MOSFET and the low side boost MOSFET. The regulator’s control method is based upon current mode control utilizing an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

产品特性

LM25118Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (–40°C to 125°C Operating Junction Temperature)
Input Voltage Operating Range from 3 V to 42 V
Emulated Peak Current Mode Control
Smooth Transition Between Step-Down and Step-Up Modes
Switching Frequency Programmable to 500 KHz
Oscillator Synchronization Capability
Internal High Voltage Bias Regulator
Integrated High and Low-Side Gate Drivers
Programmable Soft-Start Time
Ultra Low Shutdown Current
Enable Input
Wide Bandwidth Error Amplifier
1.5% Feedback Reference Accuracy
Thermal Shutdown
Package: HTSSOP-20 (Exposed Pad)

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