Texas Instruments LM10500, User Manual

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7 Connection Guide
7.1 Default Setting and Operation Options
The designed default condition and operating range for the LM10500 Evaluation Board are shown in the
following table.
Parameter Default Setting Operation Range and Options
PVIN
J7 open
Connect to External Supply =
12V
J7 open, connect PVIN to external supply. Voltage range is between 3 V
and 18 V.
J7 closed, PVIN is connected to V
BAT
= 3.6 V. V
BAT
is generated by the
USB2PWI board. To protect the USB2PWI board, do not connect PVIN to
an external power supply with J7 closed. Loading capability of V
BAT
is very
limited.
AVIN
= PVIN
by JP2
On JP2, connect AVIN to PVIN. AVIN follows PVIN voltage.
On JP2, connect AVIN to AVIN_EXT. AVIN_EXT can be connected to an
external supply. Voltage range is between 3 V and 18 V, regardless of
PVIN voltage. Note that AVIN = 5 V provides optimal efficiency.
V
OUT
1.2 V @LM10500SQ-1.0EV
0.6 V to 5 V (with resistor divider and PWI programming)
0.8 V @LM10500SQ-0.8EV
VPWI 2.5 V
On JP1, connect VPWI to 2.5 V. VPWI is powered by on-board LDO.
On JP1, connect VPWI to VPWI_EXT. VPWI is powered by external supply
(1.8 V - 10% to 3.3 V + 10%).
Switching Frequency 300 kHz
J2 close, frequency range is from 300 kHz to 1.5 MHz, programmed by
R20.
J2 open, switch node can be synchronized to an external clock. Note that
R20 should also be selected to provide the same frequency as the external
clock. Please refer to the LM10500 5A Step-Down Energy Management
Unit w/PowerWise Adaptive Voltage Scaling data sheet for more details.
I
OUT
0 A to 5 A
No. of PCB Layers 4
Max Temperature 85°C
7.2 Terminal Descriptions
Terminals Description
PVIN
Connect the power supply between this terminal and the GND terminal beside it. The device is rated between 3
V to 18 V. The absolute maximum voltage rating is 22 V.
GND
The GND terminals are meant to provide close return paths to the power and signal terminals besides them.
They are all connected together on board.
SW
SW is connected to the switch node of the power stage. It can be used to monitor the switch node waveform by
a scope.
VOUT VOUT terminal is connected to the output capacitor on the board and should be connected to the load
FB
FB terminal is connected to the FB pin of the LM10500. It can be used to monitor the AVS voltage command
programmed by PWI. Careful not to add any noise to the FB terminal or load it by any means.
AVIN_EXT External AVIN supply. Connect AVIN to AVIN_EXT on JP2 to power AVIN externally.
SYNC
Synchronizing clock input. When J2 is Closed, switching frequency is controlled by the on board resistor R20.
When J2 is Open, the switch node waveform will be synchronized to the clock source connected to SYNC
terminal.
PWROK
This terminal connects to the PWROK pin of the LM10500. PWROK is pulled up to 2.5V through a 10-kΩ
resistor.
VPWI_EXT External VPWI supply. Connect VPWI to VPWI_EXT on JP2 to power VPWI externally.
J4 J5 J6 Connectors to the USB2PWI board shown in Section 8.2 ; see Section 8.2 .
J1 Connector to monitor AVS signal or to an external controller; see Section 8.3 .
www.ti.com Connection Guide
SNVA453B – AUGUST 2011 – REVISED JANUARY 2022
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LM10500 Step-Down Converter Evaluation Module User's Guide 5
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