Datasheet

www.ti.com Connection Descriptions
6.2 Over-Current Protection
The evaluation board is configured with over-current protection. This function is completely contained in
the LM21215A-1. The peak current is limited to approximately 17A.
6.3 Quick Setup for Software Control
Once the LM10011 evaluation board is setup and the LM21215A-1 is determined to be correctly regulating
the output voltage, the software can be installed and communication can then be established with the
LM10011. In the evaluation board kit, there should be a CD with all the necessary executable files to
install the LM10011 GUI. If there is no CD, the software can be found in the LM10011 GUI Installer
(SNVC071).
The installation files should be executed on a PC running Windows XP or later.
7 Connection Descriptions
Terminal Silkscreen Description
VIN This terminal is the input voltage to the evaluation board. The evaluation board will operate over the
input voltage range of 2.97V to 5.5V.
GND These terminals are the ground connections to the device. The input power ground should be connected
next to the input VIN connection, and the output power ground next to the VOUT connection.
VOUT This terminal connects to the output voltage of the power supply and should be connected to the load.
ENABLE This terminal connects to the enable pin of the LM21215A-1. ENABLE can be left floating or driven
externally. If left floating, a 2 µA current source will pull the pin high, thereby enabling the device. If
driven externally, a voltage typically less than 1.24V will disable the LM21215A-1 and above 1.35V will
enable the LM21215A-1.
SS/TRK This terminal provides access to the SS/TRK pin of the LM21215A-1. Connections to SS/TRK are not
needed for most applications. The feedback pin of the device will track the voltage on the SS/TRK pin if
it is driven with an external voltage source that is below the 0.6V reference.
PGOOD This terminal connects to the power good output of the LM21215A-1. This pin is pulled up through a
10kΩ pull-up resistor to VIN.
AC INJ This terminal block allows the user to insert an AC injection signal across a 49.9Ω resistor for open loop
gain bode measurements. A jumper shorts this resistor when it is not needed.
SWITCH This terminal allows easy probing of the switch node. Do not apply any external voltage source to this
pin.
SYNC This terminal connects to the SYNC pin of the LM21215A-1. The regulator can synchronize the SWITCH
pin to a SYNC signal with a frequency between 300kHz and 1.5MHz. If this pin is left open, the switching
frequency will default to 500kHz.
VIN_SENSE+, These terminals allow a sense connection on the board for accurate V
IN
and V
OUT
measurements,
VIN_SENSE-, respectively.
VOUT_SENSE+,
VOUT_SENSE-
IDAC This terminal connects to the LM10011 IDAC output (IDAC_OUT).
PEN This terminal connects to the enable (EN) pin of the LM10011. EN can be left floating or driven
externally. If left floating, a 2µA current source will pull the LM10011 EN pin high, thereby enabling the
LM10011. If driven externally, a voltage typically less than 1.24V will disable the LM10011 and above
1.34V will enable the LM10011.
FB This jumper connects the LM10011 output to the feedback node of the LM21215A-1. If the LM10011 is
used to control the output voltage, then this jumper is required. If the LM10011 is to be evaluated alone,
then the IDAC_OUT current can be observed at the IDAC connection by removing the jumper.
J1 This terminal block is used to connect the LM10011 evaluation board with the communications dongle.
JP1 This terminal block controls the source of power for the LM10011. If a jumper is connected between pins
1 and 2, then the LM10011 supply comes from PVIN. If the jumper is connected from pins 2 and 3, then
the LM10011 derives power from an external connection to VDD.
JP2 This terminal block controls the mode of the LM10011. To put the LM10011 into 4-Bit mode, set the
terminal block to VDD. For 6-Bit mode, set the terminal block to GND.
VDD This terminal can be used as an alternate power source for the LM10011 though terminal block JP1.
5
SNOU108A–December 2012–Revised April 2013 LM10011 Evaluation Module
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