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LM3000

Texas Instruments
Part Number LM3000
Manufacturer Texas Instruments
Description Dual Synchronous Emulated Current-Mode Controller
Published Apr 15, 2024
Detailed Description LM3000 www.ti.com SNVS612B – JULY 2009 – REVISED APRIL 2013 LM3000 Dual Synchronous Emulated Current-Mode Controller ...
Datasheet PDF File LM3000 PDF File

LM3000
LM3000


Overview
LM3000 www.
ti.
com SNVS612B – JULY 2009 – REVISED APRIL 2013 LM3000 Dual Synchronous Emulated Current-Mode Controller Check for Samples: LM3000 FEATURES 1 •2 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 APPLICATIONS • DC Power Distribution Systems • Graphic Cards - GPU and Memory ICs • FPGA, CPLD, and ASICs • Embedded Processor • 1.
8V and 2.
5V I/O Supplies • Networking Equipment (Routers, Hubs) DESCRIPTION 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, overvoltage crowbar and hiccup mode during short circuit events.
1 Please be aware that an important notice concerning availability, sta...



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