Posts, Probes, and Jumpers
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SNVU542 – July 2017
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Copyright © 2017, Texas Instruments Incorporated
LMS36x5x-Q1 EVM User's Guide
5.9
Jumper J1
Jumper J1 sets light load operation mode of the IC. If set to [AUTO-MODE] when lightly loaded the IC
goes automatically into PFM operation with fewer switching pulses and higher efficiency. The IC can be
set into forced PWM mode (jumper position is marked
FPWM
) to operate with a constant switching
frequency over the entire load range. This forced FPWM mode of operation will have improved load
transient behavior because there is no operation mode change during load transient steps.
5.10
Jumper J2
Jumper J2 enables the IC. By default it is set to [EN-VIN] and pulls the enable pin through a 100-k
Ω
resistor to Vin. If an external source drives the EN pin, then remove jumper J2 and use probe points EN
and GND2 or use a 3-pin wire connector directly plugged over J2.
5.11
Jumper J3
Jumper J3 pulls the open-drain RESET output to VOUT through a 100-k
Ω
resistor. If another RESET
output level is needed, use probe point RESET and pullup resistor to external reference voltage and
remove jumper J3.
6
Bill of Materials
Table 3. Bill of Materials
DESIGNATOR
QTY
VALUE
DESCRIPTION
PART NUMBER
C1
1
0.47 µF
CAP, CERM, 0.47 µF, 25 V, ±10%, X7R, 0603
GRM188R71E474KA12D
C2
1
10 µF
CAP, CERM, 10 µF, 50 V, ±10%, X7R, 1210
UMK325AB7106KM-T
C3
1
4.7 µF
CAP, CERM, 4.7 µF, 16 V, +/- 10%, X7R, AEC-Q200
Grade 1, 0805
GCM21BR71C475KA73L
C4
1
120 µF
CAP, AL, 120 µF, 16 V, +/- 20%, 0.024 ohm, SMD
APXE160ARA121MH70G
C5
1
33 µF
CAP, Aluminum Polymer, 33 µF, 50 V, +/- 20%, 0.04 ohm,
AEC-Q200 Grade 1, D6.3xL7.7mm SMD
HHXA500ARA330MF80G
C6, C9
2
0.1 µF
CAP, CERM, 0.1 µF, 50 V, ±10%, X7R, AEC-Q200 Grade
1, 0603
06035C104KAT2A
C7, C8, C10, C11
4
4.7 µF
CAP, CERM, 4.7 µF, 50 V, ±20%, X7R, AEC-Q200 Grade
1, 1210
CGA6P3X7R1H475M250AB
C12, C15
2
0.047 µF
CAP, CERM, 0.047 µF, 50 V, +/- 10%, X7R, 0603
GRM188R71H473KA61D
C18
1
0.1 µF
CAP, CERM, 0.1 µF, 16 V, +/- 10%, X7R, AEC-Q200
Grade 1, 0603
GCM188R71C104KA37J
FB1
1
800
Ω
Ferrite Bead, 800
Ω
at 100 MHz, 8A, 1206
HR2220V801R-10
H1, H2, H3, H4
4
Machine Screw, Round, #4-40 × 1/4, Nylon, Philips
panhead
NY PMS 440 0025 PH
H5, H6, H7, H8
4
Standoff, Hex, 0.5"L #4-40 Nylon
1902C
J1, J2
2
Header, 100 mil, 3×1, Gold, TH
HTSW-103-07-G-S
J3
1
Header, 100 mil, 2×1, Gold, TH
HTSW-102-07-G-S
L1
1
4.7 µH
Inductor, Wirewound, Ferrite, 4.7 µH, 7.5 A, 0.0135 ohm,
SMD
7443340470
L2
1
10 µH
Inductor, Shielded Drum Core, WE-Superflux200, 10 µH,
7.5 A, 0.0163 ohm, SMD
7443251000
LBL1
1
Thermal Transfer Printable Labels, 0.650" W x 0.200" H -
10,000 per roll
THT-14-423-10
LCM
1
Coupled inductor, 5 A, 0.01
Ω
, SMD
ACM9070-701-2PL-TL01
R1, R2
2
0
Ω
RES, 0
Ω
, 5% 0.25 W, 1206
CRCW12060000Z0EA
R2
1
3
Ω
RES, 3
Ω
, 5%, 0.063 W, 0402
CRCW04023R00JNED
R6, R7, R8
3
100 k
RES, 100 K, 5%, 0.1 W, 0603
CRCW0603100KJNEA
SH-J1, SH-J2, SH-J3
3
1×2
Shunt, 100 mil, Gold plated, Black
969102-0000-DA
TP1
1
Test Point, Miniature, Red, TH
5010
TP2
1
Test Point, Miniature, Orange, TH
5013
TP3, TP4, TP6, TP7
4
Test Point, Multipurpose, White, TH
5012
TP5, TP8
2
Test Point, Miniature, Black, TH
5011
