Texas Instruments LM10011 4/6-Bit VID Voltage Programmer Evaluation Module LM10011EVM LM10011EVM Scheda Tecnica
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LM10011EVM
User's Guide
SNOU108A – December 2012 – Revised April 2013
LM10011 Evaluation Module
1
Introduction
This application report describes the various functions of the LM10011 evaluation module, how to test and
evaluate it, and how to use the GUI design tool to change the components for a specific application.
Please check the LM10011 GUI Installer (
evaluate it, and how to use the GUI design tool to change the components for a specific application.
Please check the LM10011 GUI Installer (
) for the latest software and the 6/4-Bit VID
Programmable Current DAC for Point of Load Regulators with Adjustable Start-Up Current (
).
For more information on the LM21215A-1 and its operation, please check the LM21215A-1 15A High
Efficiency Synchronous Buck Regulator with Frequency Synchronization (
Efficiency Synchronous Buck Regulator with Frequency Synchronization (
) and the AN-2131
LM21215A-1 Evaluation Board User's Guide (
The LM10011 is a precision, digitally programmable device used to control the output voltage of a DC/DC
converter. The LM10011 outputs a DC current proportional to a 6-bit or 4-bit input word. The current DAC
output is intended to connect to the feedback node of a buck converter in order to adjust the converter
output voltage to a desired range and resolution. As the 6-bit or 4-bit word counts up, the output voltage is
adjusted higher based on the setting of the feedback resistors in the buck converter.
converter. The LM10011 outputs a DC current proportional to a 6-bit or 4-bit input word. The current DAC
output is intended to connect to the feedback node of a buck converter in order to adjust the converter
output voltage to a desired range and resolution. As the 6-bit or 4-bit word counts up, the output voltage is
adjusted higher based on the setting of the feedback resistors in the buck converter.
The LM10011 evaluation module provides the power design engineer with a low voltage high current
point-of-load solution with an adjustable output voltage using the LM10011 VID controlled current DAC, an
LM21215A-1 15A integrated buck regulator, and a companion GUI software. The GUI software along with
included hardware are used to assist in the design and understanding of how to implement the LM10011.
The GUI can be used to change the output voltage of the on-board POL based on direct user input. It is
also able to assist the power designer in selecting the correct external components needed for any given
application.
point-of-load solution with an adjustable output voltage using the LM10011 VID controlled current DAC, an
LM21215A-1 15A integrated buck regulator, and a companion GUI software. The GUI software along with
included hardware are used to assist in the design and understanding of how to implement the LM10011.
The GUI can be used to change the output voltage of the on-board POL based on direct user input. It is
also able to assist the power designer in selecting the correct external components needed for any given
application.
2
PCB Features
•
Input voltage range: 2.97V to 5.5V
•
V
OUT
at start-up: 0.9V
•
Programmable output voltage: 0.7V to 1.1V (adjustable)
•
Over current protection: 17A
•
PCB Size: 2.2” x 2.8”
•
USB connection through communications dongle
•
Software control with graphical user interface
3
Evaluation Module Introduction
The evaluation module provides a VID interface to test the LM10011 and its control of an LM21215A-1
buck regulator. The LM21215A-1 is capable of driving up to 15A of continuous load current with excellent
output voltage accuracy due to its ±1% internal voltage reference and high gain error amplifier. The
LM21215A-1 also features a clock synchronization input (SYNC), precision enable pin (ENABLE), a power
good output (PGOOD), and a soft-start and track pin (SS_TRK) (as labeled on the PCB). The input
voltage can be operated from 2.97V to 5.5V. On power-up, the output voltage defaults to 0.9V. The
evaluation board allows for control of the LM21215A-1 output voltage from 0.7V to 1.1V in 6.4mV steps
through the 4-pin VID interface of the LM10011. A 10-pin header is included to communicate with the
LM10011. A USB communications dongle is provided along with software to control the output voltage
through a graphical user interface (GUI) and a USB port.
buck regulator. The LM21215A-1 is capable of driving up to 15A of continuous load current with excellent
output voltage accuracy due to its ±1% internal voltage reference and high gain error amplifier. The
LM21215A-1 also features a clock synchronization input (SYNC), precision enable pin (ENABLE), a power
good output (PGOOD), and a soft-start and track pin (SS_TRK) (as labeled on the PCB). The input
voltage can be operated from 2.97V to 5.5V. On power-up, the output voltage defaults to 0.9V. The
evaluation board allows for control of the LM21215A-1 output voltage from 0.7V to 1.1V in 6.4mV steps
through the 4-pin VID interface of the LM10011. A 10-pin header is included to communicate with the
LM10011. A USB communications dongle is provided along with software to control the output voltage
through a graphical user interface (GUI) and a USB port.
1
SNOU108A – December 2012 – Revised April 2013
LM10011 Evaluation Module
Copyright © 2012–2013, Texas Instruments Incorporated