LM61460-Q1
RESET
EN/SYNC
RT
PGND1
AGND
VCC
CBOOT
SW
FB
BIAS
RBOOT
3.0 V to 36 V input
VIN1
PGND2
VIN2
3
.5
mm
4 mm
BI
AS
C
BO
O
T
R
BO
O
T
EN
/
SYN
C
R
ESET
VI
N
1
VI
N
2
PG
N
D
1
PG
N
D
2
SW
FB
AGND
VCC
R
T
Introduction
3
SNVU621C – May 2019 – Revised December 2019
Copyright © 2019, Texas Instruments Incorporated
LM61460-Q1 EVM User's Guide
/RESET and PGOOD are used to describe the same device
pin throughout this document and other documents. Be aware
that these pin nomenclatures are used to describe the same
pin.
Figure 3. LM61460-Q1 Pin Configuration (Top View)
Figure 4. LM61460-Q1 Schematic
1.2
LM61460-Q1 Evaluation Module
The LM61460-Q1 EVM has the board populated with the LM61460 in either one of two variants. Based on
the label populated, you can figure out which device trim is populated on the EVM and the corresponding
features. This board uses the LM61460-Q1 and limiting current to 6 A and comes with auto mode enabled.
Table 2. EVM Variants
LABEL
U1
I
OUT
SWITCHING
FREQUENCY
V
IN
RANGE
V
OUT
AUTO
MODE
FPWM
SPREAD SPECTRUM
LM61460EV
M-AS-400K
LM61460AA
SQRJRRQ1
6 A
400 kHz
3 to 36 V
5 V
Enabled
Disabled
Enabled
LM61460EV
M-FS-400K
LM61460AF
SQRJRRQ1
6 A
400 kHz
3 to 36 V
5 V
Disabled
Enabled
Enabled
2
Quick Start
1. Connect the voltage supply between the VIN and GND connectors or between VIN_EMI and
GND_EMI to include the on-board input filter in the input path. Use short and thick gauge wires to
minimize inductance and IR drop. Note that sense points for V
IN
and V
OUT
are provided.
2. Connect the load of the converter between VOUT and GND connectors using short and thick wires.
3. Set the supply voltage at an appropriate level between 6 V to 36 V. The 6 V minimum ensures enough
head room for V
OUT
to equal 5 V at a 6 A load current. Set the current limit of the supply to an
appropriate level to supply needed current and protection.
4. Turn on the power supply. With the default configuration, the EVM powers up and provides V
OUT
= 5 V.
5. Monitor the output voltage with sense points. The maximum load current must be 6 A with the
LM61460-Q1. Note that the maximum output current may need to derate if ambient temperature is
high, especially if device is operated at higher frequency, ie: 2.2MHz.
See
for connector locations.