Texas Instruments TPS65270 User manual

User’s Guide
TPS65270 Buck Converter Evaluation Module User's
Guide
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Background.............................................................................................................................................................................3
3 Schematic................................................................................................................................................................................4
4 Board Layout...........................................................................................................................................................................5
5 Bench Test Setup Conditions................................................................................................................................................ 6
5.1 Headers Description and Jumper Placement.....................................................................................................................6
5.2 Jumpers..............................................................................................................................................................................7
6 Power-Up Procedure.............................................................................................................................................................. 8
7 Bill of Materials....................................................................................................................................................................... 9
8 Revision History......................................................................................................................................................................9
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www.ti.com Table of Contents
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1 Introduction
This document presents the information required to power the TPS65270 PMIC as well as the support
documentation including schematic and bill of materials.
Introduction www.ti.com
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2 Background
The TPS65270 PMIC is designed to provide 2-A and 3-A continuous currents with an operational range of 4.5 V
to 16 V and an externally set switching frequency ranging from 300 kHz to 1.4 MHz. When the PMIC is not fully
loaded, Buck1 can be loaded to 2.5 A and Buck2 to 3.5 A.
As there are many possible options to set the converters, Table 2-1 presents the performance specification
summary for the EVM.
Table 2-1. Input Voltage and Output Current Summary
EVM TEST CONDITIONS OUTPUT CURRENT RANGE
TPS65270EVM VIN = 4.5 V to 16 V
fsw = 620 kHz
Buck1, 1.8 V, up to 2 A
Buck2, 1.2 V, up to 3 A
(25°C ambient)
This evaluation module is designed to provide access to the features of the TPS65270. Some modifications
can be made to this module to test performance at different input and output voltages, current and frequency
operation. Please contact TI Field Applications Group for advice on these matters.
www.ti.com Background
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3 Schematic
Figure 3-1. TPS65270 Schematic
Schematic www.ti.com
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4 Board Layout
Figure 4-1. Placement (Top Layer)
Figure 4-2. Board Layout (Top Layer)
Figure 4-3. Board Layout (Bottom Layer)
www.ti.com Board Layout
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5 Bench Test Setup Conditions
5.1 Headers Description and Jumper Placement
VIN
VOUT1
VOUT2
A
B
12V
GND
JP3/LOW_P
JP2/EN2
JP1/ EN1
Figure 5-1. Headers Description and Jumper Placement
Test points:
A: LX of VOUT1
B: LX of VOUT2
VOUT1, VOUT2, VCC, EN1, EN2, LOW_P
Bench Test Setup Conditions www.ti.com
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5.2 Jumpers
Table 5-1. Jumpers
JUMPER
NO. FUNCTION PLACEMENT COMMENT
JP1 BUCK1 enable (EN1)
Connect EN1 to GND to disable VOUT1, connect
EN1 to VIN to enable VOUT1;
Leave open to enable VOUT1
JP2 BUCK2 enable (EN2)
Connect EN2 to GND to disable VOUT2, connect
EN2 to VIN to enable VOUT2;
Leave open to enable VOUT2
JP3 Low Power Mode (LOW_P)
Connect LOW_P to GND to enter forced PWM
mode; Connect LOW_P to VCC to enter automatic
PSM/PWM mode
Cannot leave open
www.ti.com Bench Test Setup Conditions
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6 Power-Up Procedure
1. Apply 4.5 V - 16 V to J3.
2. Toggle JP1 or JP2 to enable VOUT1 and VOUT2 respectively.
3. Apply loads to the output connectors.
Power-Up Procedure www.ti.com
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7 Bill of Materials
Table 7-1. Bill of Materials
ITEM QUANTITY DESIGNATOR VALUE FOOTPRINT MANUFACTURER DESCRIPTION
1 2 C1, C7 4.7nF 603 Generic CAP 4700PF 50V CERAMIC
X7R 0603
2 2 C2, C6 10nF 603 Generic CAP 10000PF 50V CERM X7R
0603
3 2 C3, C5 2.2nF 603 Generic CAP 2200PF 50V CERAMIC
X7R 0603
4(1) 2 C3A, C5A 100pF 603 Generic CAP100PF 50V CERAMIC X7R
0603
5 2 C9, C13 10uF 1210 Generic CAP 10UF 35V CERAMIC X5R
1210
6 1 C4 10uF 603 Generic CAP CER 10UF 10V X5R 20%
0603
7 2 C8, C12 47nF 603 Generic CAP 47000PF 50V CERAMIC
X7R 0603
8 2 C10, C14 22uF 1210 Generic CAP 22UF 16V CERAMIC X5R
1210
9(1) 2 C11, C15 82pF 603 Generic CAP 82PF 50V CERAMIC X7R
0603
10 3 J1, J2, J3 ED555/2DS TB_2X3.5MM Onshore technology Inc Terminal Block, 2-pin, 6-A,
3.5mm
11(2) 3 JP1, JP2, JP3 NA JMP0.3 Mil Max/Generic
SIP HEADER 64
POS STRAIGHT PCB
(800-10-064-10-001000 )
12 2 L1, L2 4.7uH IND_744311470 Wurth Electronics Inc Magnetic-Core Inductor
13 2 R1, R2 10K 603 Generic RES 10.0K OHM 1/10W 1%
0603 SMD
14 2 R4, R5 0 603 Generic RES 0 OHM 1/10W 1% 0603
SMD
15 2 R4A, R5A 40.2K 603 Generic RES 40.2K OHM 1/10W 1%
0603 SMD
16 1 R4B 32.4K 603 Generic RES 32.4K OHM 1/10W 1%
0603 SMD
17 1 R5B 80.6K 603 Generic RES 80.6K OHM 1/10W 1%
0603 SMD
18 2 R6, R7 200K 603 Generic RES 200K OHM 1/10W 1%
0603 SMD
19 1 R8 383K 603 Generic RES 3830K OHM 1/10W 1%
0603 SMD
20 2 R13, R24 47 603 Generic RES 47 OHM 1/10W 1% 0603
SMD
21 3 TP1, TP2, TP3 5001 TH-40 Keystone Electronics Test Point, Black, Thru Hole
Color Keyed
22 5 TP5, TP6, TP7,
TP8, TP9 5002 TH-40 Keystone Electronics Test Point, White, Thru Hole Color Keyed
23 1 U1 NA RGE24 Texas Instruments 'TPS65270RGE24
24(3) 4 NA NA NA 3M SJ-5303 (CLEAR), BUMPON
HEMISPHERE .44X.20 CLEAR
25(4) 3 NA NA NA Sullins Connector Solutions SPC02SYAN, CONN JUMPER
SHORTING GOLD FLASH
(1) Optional
(2) Split into three pins
(3) Install item 24 on bottom at corners.
(4) Install item 25 on item 11 no order - be consistent
8 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
www.ti.com Bill of Materials
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Changes from Revision B (December 2011) to Revision C (May 2021) Page
• Updated the numbering format for tables, figures, and cross-references throughout the document. ................2
• Updated user's guide title .................................................................................................................................. 2
Revision History www.ti.com
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