LM3000 - 双路同步仿真电流模式控制器

LM3000是TI德州仪器公司的一款控制器（外部开关）产品，LM3000是双路同步仿真电流模式控制器，本站介绍了LM3000的封装应用图解、特点和优点、功能等，并给出了与LM3000相关的TI元器件型号供参考。

LM3000 - 双路同步仿真电流模式控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3000 is a dual output synchronous buck controller which is designed to convert input voltages ranging from 3.3V to 18.5V down to output voltages as low as 0.6V. The two outputs switch at a constant programmable frequency of 200 kHz to 1.5 MHz, with the second output 180 degrees out of phase from the first to minimize the input filter requirements. The switching frequency can also be phase locked to an external frequency. A CLKOUT provides an external clock 90 degrees out of phase with the main clock so that a second chip can be run out of phase with the main chip. The emulated current-mode control utilizes bottom side FET sensing to provide fast transient response and current limit without the need for external current sense resistors or RC networks. Separate Enable, Soft-Start and Track pins allow each output to be controlled independently to provide maximum flexibility in designing system power sequencing.

The LM3000 has a full range of protection features which include input under-voltage lock-out (UVLO), power good (PGOOD) signals for each output, over-voltage crowbar and hiccup mode during short circuit events.

产品特性

VIN Range FROM 3.3V to 18.5V
Output Voltage From 0.6V to 80% of VIN
Remote Differential Output Voltage Sensing
1% Accuracy at FB Pin
Interleaved Operation Reduces Input Capacitors
Frequency Sync/Adjust From 200 kHz to 1.5 MHz
Startup With Pre-Bias Load
Independent Power Good, Enable, Soft-Start and Track
Programmable Current Limit Without External Sense Resistor
Hiccup Mode Short Circuit Protection

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