User's Guide
SLVU366 – April 2010
TPS657051/2EVM-522 Evaluation Module
This user’s guide describes the characteristics, operation, and use of the TPS657051/2EVM evaluation
module (EVM). The EVM is designed to help the user easily evaluate and test the operation and
functionality of the TPS657051/2. This user’s guide includes setup instructions for the hardware, a
schematic diagram, a bill of materials, and printed-circuit board layout drawings for the evaluation module.
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2
3
4
5
6
7
Contents
Introduction .................................................................................................................. 1
1.1
Requirements ....................................................................................................... 1
1.2
Power Supply Requirements ..................................................................................... 2
1.3
Applications ......................................................................................................... 2
1.4
Features ............................................................................................................. 2
TPS657051/2EVM Electrical Performance Specifications ............................................................. 2
TPS657051/2EVM Schematic ............................................................................................. 3
Connector and Test Point Descriptions .................................................................................. 4
4.1
Input/Output Connectors .......................................................................................... 4
4.2
Enable Jumpers and Switches ................................................................................... 5
Setup ......................................................................................................................... 6
5.1
Hardware Setup .................................................................................................... 6
TPS657051/2EVM Assembly Drawings and Layout ................................................................... 7
Bill of Materials ............................................................................................................. 10
List of Figures
1
TPS657051/2EVM Schematic ............................................................................................. 3
2
Hardware Board Connection .............................................................................................. 6
3
TPS657051/2EVM Component Placement, Viewed From Top ....................................................... 7
4
TPS657051/2EVM Silkscreen Top, X-Ray View
5
6
7
8
.......................................................................
TPS657051/2EVM Top Copper, Viewed From Top ....................................................................
TPS657051/2EVM Internal 1, X-Ray View ..............................................................................
TPS657051/2EVM Internal 2, X-Ray View From Top ..................................................................
TPS657051/2EVM Bottom Copper View, X-Ray View From Top ....................................................
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8
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List of Tables
1
.......................................................
...............................................................................................
1
TPS657051/2EVM Electrical and Performance Specifications
2
HPA522A Bill of Materials
2
10
Introduction
The TPS657051/2EVM-522 evaluation module is a fully assembled and tested circuit for evaluating the
TPS657051/2 3-channel power management integrated circuit (IC).
1.1
Requirements
In order to operate this evaluation module (EVM), the following components must be connected and
properly configured. All components and connectors are supplied in the EVM DC power supply.
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TPS657051/2EVM Electrical Performance Specifications
1.2
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Power Supply Requirements
A dc power supply capable of delivering 5 V at 1 A is required to operate this EVM
1.3
Applications
•
•
1.4
Features
•
•
•
•
2
USB camera
Handheld applications
Input voltage rating
2 × 200-mA Step-down converter for TPS657051/2
2.25-MHz switching frequency
1 General-purpose 200-mA LDO
TPS657051/2EVM Electrical Performance Specifications
Table 1. TPS657051/2EVM Electrical and Performance Specifications
Parameter
Notes and Conditions
Min
Typ
Max
Unit
INPUT CHARACTERISTICS
VIN
Input Voltage
3.3
6
V
VIN1
Input Voltage DCDC1
3.3
6
V
VIN2
Input Voltage LDO1
3.3
6
V
VUVLO
UVLO
VAC rising
3.2
3.45
V
VHYS
UVLO Hysteresis
VAC falling
200
300
mV
-UVLO
3.3
OUTPUT CHARACTERISTICS
VDCDC1
Output Voltage DCDC1
VIN = Nom, IOUT = Nom
3.3
V
VDCDC2
Output Voltage DCDC2
VIN = Nom, IOUT = Nom
1.8
V
VLDO1
Output Voltage LDO1
VIN = Nom,
IOUT = Nom
TPS657051
3.0
TPS657052
2.8
Output Voltage Accuracy DCDC1, VIN = 3.3 V to 6 V, PFM Mode,
DCDC2
Load 0 mA to Iout, max
–1.5
%
–
1
–2%
V
1.5%
3
Output Voltage Accuracy LDO1
IOUT = 100 mA, Vout = 2.8 V
+2%
Dropout Voltage at LDO
IO = 200 mA
IOUT1
Output Current DCDC1
VIN = Min to Max
400
mA
IOUT2
Output Current DCDC2
VIN = Min to Max
400
mA
IOUT1
Output Current LDO1
VIN = Min to Max
200
mA
200
mV
SYSTEMS CHARACTERISTICS
2
FSW
Switching Frequency
hpk
Peak Efficiency
2030
VIN = Nom
TPS657051/2EVM-522 Evaluation Module
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–
2250
2480
kHz
92%
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TPS657051/2EVM Schematic
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3
TPS657051/2EVM Schematic
For Reference Only, See Table 2 Bill of Materials for Specific Values
Figure 1. TPS657051/2EVM Schematic
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Connector and Test Point Descriptions
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Connector and Test Point Descriptions
4.1
Input/Output Connectors
4.1.1
J1 – VLDO
This header is the positive output of the low-dropout (LDO) linear regulator. The default output voltage of
the LDO is 3 V (TPS657051) and 2.8 V (TPS657052). The LDO is capable of sourcing up to 200-mA. A
load can be connected between J1 and J3 (GND).
This header is the positive connection to the input power supply. The power supply must be connected
between J1 and J2 (GND). Twist the leads to the input supply, and keep them as short as possible. The
input voltage has to be between 4.35 V and 6 V.
4.1.2
J2 – S+/S–
J2 S+/S– is the sense connection for the output of the LDO. Connect a voltmeter, sense connection of an
electronic load, or oscilloscope to this header.
4.1.3
J3 – GND
J3 is the return connection of the LDO. A load can be connected between J3 and J1 (VLDO).
4.1.4
J4 – VINLDO
This header is the input supply for the LDO on the EVM VINLDO and is directly connected to VIN with R1.
An external power supply can be connected between J4 (VINLDO) and J6 (GND). Note that the resistors
R1 must be removed when supplying the LDO from an external power supply.
4.1.5
J5 – S+/S–
J5 S+/S– is the sense connection for the input power supply of the LDO. Connect a voltmeter, sense
connection of a power supply, or oscilloscope to this header.
4.1.6
J6 – GND
J6 is the return connection of the input power supply for the LDO on the EVM. The input of the LDO is
directly connected to VIN with R1. Connect an input power supply of the LDO between J4 (VINLDO) and
J6.
4.1.7
J7 – VOUT DCDC2
This header is the positive output of VDCDC2 step-down converter. The output voltage of DCDC2 is fixed
to 1.8 V from the TPS657051 and TPS657052.
VDCDC2 is capable of sourcing up to 400 mA. A load can be connected between J7 and J9 (GND).
4.1.8
J8 – S+/S–
J8 S+/S– are the sense connection for the output of DCDC2. Connect a voltmeter, sense connection of an
electronic load, or oscilloscope to this header.
4.1.9
J9 – GND
J8 is the return connection of VDCDC2 output rail. A load can be connected between J9 and J7
(VDCDC2).
4.1.10
J4 – VIN
This header is the input supply for the dc/dc converters. Connect a power supply between J12 (GND) and
J10.
4
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Connector and Test Point Descriptions
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4.1.11
J11 – S+/S–
J11 S+/S– is the sense connection for the input power supply of the dc/dc converters. Connect a
voltmeter, sense connection of a power supply or oscilloscope to this header.
4.1.12
J12 – GND
J12 is the return connection of the input power supply of the dc/dc converters. Connect a power supply
between J10 (VIN) and J12.
4.1.13
J13 – VOUT DCDC1
This header is the positive output of VDCDC1 step-down converter. The output voltage of DCDC1 is fixed
to 3 V (TPS657051) and 2.8 V (TPS657052).
VDCDC1 is capable of sourcing up to 400 mA. A load can be connected between J15 (GND) and J13.
4.1.14
J14 S+/S–
J14 S+/S- are the sense connection for the output of DCDC1. Connect a voltmeter, sense connection of
an electronic load, or oscilloscope to this header.
4.1.15
GND
J8 is the return connection of VDCDC2 output rail. A load can be connected between J13 (VOUT DCDC1)
and J15.
4.2
4.2.1
Enable Jumpers and Switches
JP1 MODE
JP1 selects the forced PWM or Power Save Mode (PSM) operation for the DC/DC converters. Placing a
shorting bar between MODE and PWM ties the MODE pin of TPS655051/2 to VIN, thereby selecting
forced PWM operating mode for the DC/DC converters. Placing a shorting bar between MODE and PFM
ties the MODE pin of TPS657051/2 to GND, thereby selecting Power Save Mode operating mode for the
DC/DC converter at light-load conditions. If Power Save mode is selected, the DC/DC converters
automatically switch to PWM mode at heavier load conditions.
4.2.2
JP2 EN_DCDC1
Placing a shorting bar between EN_DCDC1 and ON ties the enable pin of the DC/DC converter to VIN,
thereby enabling the DCDC1. Placing a shorting bar between EN_DCDC1 and OFF ties the enable pin of
the DC/DC converter to GND, thereby disabling the DCDC1.
4.2.3
JP2 EN_DCDC1
Placing a shorting bar between EN_DCDC2 and ON ties the enable pin of the DC/DC converter to VIN,
thereby enabling the DCDC2. Placing a shorting bar between EN_DCDC2 and OFF ties the enable pin of
the DC/DC converter to GND, thereby disabling the DCDC2
4.2.4
JP4 EN_LDO
Placing a shorting bar between EN_LDO and ON ties the enable pin of the LDO to VIN, thereby enabling
the LDO. Placing a shorting bar between EN_LDO and OFF ties the enable pin of the LDO to GND,
thereby disabling the LDO.
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Setup
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5
Setup
5.1
Hardware Setup
Oscilloscope
GND
TPS657051/52 EVM
HPA522
S+
S-
GND
S- S+
DCDC1
J15 J14 J13
Load
DCDC2
J7
S+ S-
GND
J8
J9
OFF
GND
JP4
S+ S-
EN LDO
VIN
LDO
J6
ON
-
VIN
VOUT
LDO
J5
PSM
DC Power Supply
J10 J11 J12
+
S+
J4
ON
GND S-
J1
ON OFF
J2
PWM OFF
J3
JP1
JP3
JP2
J15
MODE
EN DCDC2 EN DCDC1
Load
Load
Figure 2. Hardware Board Connection
6
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TPS657051/2EVM Assembly Drawings and Layout
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6
TPS657051/2EVM Assembly Drawings and Layout
The following illustrations (Figure 3 through Figure 4) show the design of the TPS657051/2EVM
printed-circuit board.
Figure 3. TPS657051/2EVM Component Placement, Viewed From Top
Figure 4. TPS657051/2EVM Silkscreen Top, X-Ray View
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TPS657051/2EVM Assembly Drawings and Layout
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Figure 5. TPS657051/2EVM Top Copper, Viewed From Top
Figure 6. TPS657051/2EVM Internal 1, X-Ray View
8
TPS657051/2EVM-522 Evaluation Module
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TPS657051/2EVM Assembly Drawings and Layout
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Figure 7. TPS657051/2EVM Internal 2, X-Ray View From Top
Figure 8. TPS657051/2EVM Bottom Copper View, X-Ray View From Top
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Bill of Materials
7
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Bill of Materials
Table 2. HPA522A Bill of Materials
Count
10
RefDes
Value
Description
Size
Part Number
MFR
0
C1
open
Capacitor, Ceramic, 6.3V, X5R, 10%
0603
Std
Std
1
C2
2.2 µF
Capacitor, Ceramic, 6.3V, X5R, 10%
0603
GRM188R60J225KE19D
Murata
0
0
C3, C6, C7,
C9, C12
open
Capacitor, Ceramic, 6.3V, X5R, 20%
0603
Std
Std
1
1
C4
4.7 µF
Capacitor, Ceramic, 6.3V, X5R, 10%
0603
GRM188R60J475KE19D
Murata
4
4
C5, C8,
C10, C11
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0603
GRM188R60J106ME47D
Murata
2
2
L1, L2
1.5 µH
Inductor, 700 mA, 300 mΩ
1608
BRC1608T1R5M
Taiyo Yuden
1
1
R1
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
4
4
R2–R5
1.00M
Resistor, Chip, 1/16W, 1%
0603
Std
Std
1
0
U1
TPS657051YZH
IC, Power Management Unit fro Embedded Camera Module
DSBGA-16
TPS657051YZH
TI
0
1
U1
TPS657052YZH
IC, Power Management Unit fro Embedded Camera Module
DSBGA-16
TPS657052YZH
TI
1
1
–
HPA522
Any
-001
-002
0
1
PCB, 2.5 In x 2.1 In x 0.062 In
TPS657051/2EVM-522 Evaluation Module
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Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
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including product safety and environmental measures typically found in end products that incorporate such semiconductor
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Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 3.3 V to 6 V and the output voltage range of 1.2 V to3 V .
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 60° C. The EVM is designed to
operate properly with certain components above 60° C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
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