UM2944
User manual
Getting started with the STEVAL-1PS03A evaluation board based on
ST1PS03AQTR
Introduction
The STEVAL-1PS03A is an evaluation board for a smart converter design able to deliver up to 400 mA output current from a 1.8
to 5.5 V input, with a 1.6 to 3.3 V dynamically adjustable output voltage.
The board features the ST1PS03AQTR nano-quiescent miniaturized synchronous step-down converter, which implements enhanced peak current control (PCC) and advanced design circuitry to minimize quiescent current. The device embeds a controlled load switch to supply a subsystem with VIN_AUX voltage rail.
The STEVAL-1PS03A demonstrates how highly efficient conversion can be achieved thanks to the ST1PS03AQTR (in a thin
TQFN12 package of 2.0x1.7 mm), a 2.2 μH inductor, and two small capacitors.
The ST1PS03AQTR key application benefits include high efficiency, and small PCB size and thickness. It is extremely suitable for power conversion solutions in wearable applications and fitness accessories, personal tracking monitoring, smart watches, sport bands, energy harvesting, wireless sensors, industrial sensors, portable low-power devices, single cell Li-ion battery applications, as well as Bluetooth ® low energy and Zigbee applications.
Figure 1. STEVAL-1PS03A evaluation board
UM2944 - Rev 1 - October 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
1
1.1
1.2
UM2944
Getting started
Getting started
•
•
•
•
•
•
•
Features
1.8 to 5.5 V input operating range
Up to 400 mA output current capability
Tiny external components: L = 2.2 µH typ
Dynamically selectable output voltages from 1.6 to 3.3 V
Output voltage Power Good
Independent load switch (AUX control input)
WEEE and RoHS compliant (hardware only)
Electrical performance specification
Symbol
VIN
VIN_AUX
VOUT range
IOUT
IOUT_AUX
Table 1. Electrical performance specification (Ta = 25°C)
Input supply voltage
Auxiliary input supply voltage
Parameter
Programmable by D0, D1 and D2 (see
Table 2
)
Output current
Auxiliary output current
Min.
1.8
0
1.6
Typ.
3.6
Max.
5.5
V
IN
3.3
400
100
V mA mA
V
Unit
V
ST1PS03
Device
Table 2. Output voltage settings
D2 D1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
1
0
1
0
1
0
1
D0
1.8 V
3.3 V
2.8 V
2.7 V
3.0 V
2.1 V
1.6 V
2.5 V
V
OUT
UM2944 - Rev 1 page 2/13
UM2944
Input/output connector descriptions
1.3
Input/output connector descriptions
This section provides the descriptions of the input/output connectors of the STEVAL-1PS03A .
•
•
•
•
•
•
•
CN1 : main input power supply
– VIN_F: positive input power force
– VIN_S: positive input power sense
– GND_F: ground input force
– GND_S: ground input sense
CN9 : auxiliary input power supply
– VIN_AUX: auxiliary input voltage
– GND: ground
CN8 : output voltage connector
– OUT_F: output voltage force
– OUT_S: output voltage sense
– GND_F: ground output force
– GND_S: ground output sense
CN9 : auxiliary output voltage connector
– OUT_F: auxiliary output voltage force
– OUT_S: auxiliary output voltage sense
– GND_F: ground output force
– GND_S: ground output sense
CN2 : load switch selection pin
– Place the jumper across AUX and HIGH to enable the load switch.
– Place the jumper across AUX and LOW to disable the load switch.
CN3 : ENABLE pin
– Place the jumper across EN and HIGH to enable the buck converter.
– Place the jumper across EN and LOW to disable the buck converter.
CN4, CN5, CN6
: output voltage selection pins (see Table 2 , output voltage settings for V
OUT
selection).
Important: Do not leave these pins floating. They can be dynamically changed during operation.
UM2944 - Rev 1 page 3/13
2 Schematic diagrams
Figure 2. STEVAL-IPS03A circuit schematic
CN2
3
2
1
Header 3
CN3
3
2
1
Header 3
Vin
Vin
GND
CN9
2
1
Header 2
Vin_AUX
C2
10 uF
CN1
4
3
2
1
Header 4
Vin
Vin
GND
C1
10 uF
AUX
EN
U1
TP1
1
12
AUX
EN
5
VIN_AUX
ST1PS03AQTR
PGOOD
7 PGOOD
SW
3 Sw L1
2.2 uH
VOUT
8
R1
1 MOhm
Vout_track
JP1
PG_Track
C3
10 uF
Vout
Vout
GND
GND
GND
4
2
VIN
VOUT2
6
6
C4
10 uF
JP2
2
1
Header 2
CN8
3
4
1
2
Header 4
Vout2
Vout2
GND
GND
CN7
3
4
1
2
Header 4
DC-DC converter
CN6
3
2
1
Header 3
CN5
3
2
1
Header 3
CN4
3
2
1
Header 3
Vin
D0
GND
Vin
D1
GND
Vin
D2
GND
Vout 1
SHORT
1 2
SHORT 1203
2 Vout_track
3
UM2944
Bill of materials
Bill of materials
Table 3. STEVAL-1PS03A1 bill of materials
Item Q.ty
1 1 R1
2
3
4
5
6
7
8
9
4
1
1
1
2
5
3
1
Ref.
C1, C2,
C3, C4
L1
U1
TP1
JP2, CN9
CN2,
CN3,
CN4,
CN5, CN6
3x1, through hole, 3 A, pitch
2.54 mm
CN1,
CN7, CN8
4x1, through hole, 3 A, pitch
2.54 mm
JP1
Value Description
1 MΩ, SMD 0603, 0.25 W, ±1 % Thick film resistor
10 µF, SMD 0603, 16 V, ±20 %,
X5R
Ceramic capacitors
2.2 µH, SMD 1008, 2.6 A, ±20 %
Inductor for power circuits
ST1PS03AQTR, TQFN12
Nano-quiescent synchronous stepdown converter
Test pin, through hole
2x1, through hole, 3 A, pitch
2.54 mm
Short-circuit, through hole
Test point
Male SIL vertical connectors
Male SIL vertical connectors
Male SIL vertical connectors
Soft tinned copper wire
Manufacturer
Vishay
Part Number
CRCW06031M00FKEAHP
TDK
TDK
ST
Multicomp
Harwin
Harwin
Harwin
RS Pro
C1608X5R1C106M080AB
VLS252010HBX-2R2M-1
ST1PS03AQTR
TEST-1(Y)
M20-9993645
M20-9993645
M20-9993645
390-549
UM2944 - Rev 1 page 5/13
4 Board layout
Figure 3. STEVAL-1PS03A top layer
UM2944
Board layout
Figure 4. STEVAL-1PS03A bottom layer
UM2944 - Rev 1 page 6/13
5
UM2944
Board versions
Board versions
Table 4. STEVAL-IPS03A versions
Finished good
STEVAL$1PS03AA
(1)
Schematic diagrams
STEVAL$1PS03AA schematic diagrams
1. This code identifies the STEVAL-1PS03A evaluation board first version.
Bill of materials
STEVAL$1PS03AA bill of materials
UM2944 - Rev 1 page 7/13
6
UM2944
Regulatory compliance
Regulatory compliance
Formal Notice Required by the U.S. Federal Communications Commission
FCC NOTICE :
This kit is designed to allow:
(1) Product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and
(2) Software developers to write software applications for use with the end product.
This kit is not a finished product and when assembled may not be resold or otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter 3.1.2.
The evaluation kit has been designed to comply with part 15 of the FCC Technical Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
Standard applied: FCC CFR 47 Part 15 Subpart B. Test method applied: ANSI C63.4 (2014).
Formal Product Notice Required by Industry Canada Innovation, Science and Economic Development
Canada compliance :
For evaluation purposes only. This kit generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to Industry Canada (IC) rules.
À des fins d'évaluation uniquement. Ce kit génère, utilise et peut émettre de l'énergie radiofréquence et n'a pas
été testé pour sa conformité aux limites des appareils informatiques conformément aux règles d'Industrie Canada
(IC).
This device has been tested with Innovation, Science and Economic Development RSS standards. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Standard applied: ICES-003 Issue 7 (2020), Class B. Test method applied: ANSI C63.4 (2014).
Cet appareil a été testé pour les normes RSS d'Innovation, Science et Développement économique. L'utilisation est soumise aux deux conditions suivantes: (1) cet appareil ne doit pas causer d'interférences nuisibles, et (2) cet appareil doit accepter de recevoir tous les types d’interférence, y comprises les interférences susceptibles d'entraîner un fonctionnement indésirable.
Norme appliquée: NMB-003, 7e édition (2020), Classe B. Méthode d'essai appliquée: ANSI C63.4 (2014).
Formal product notice required by EU
This device is in conformity with the essential requirements of the Directive 2014/30/EU (EMC) and of the
Directive 2015/863/EU (RoHS).
Standards applied (Class B): EN 61000-6-1:2019, EN 61000-6-3:2007 + A1:2011 + AC:2012, EN 55032:2015 +
A1:2020, EN 55035:2017 + A11:2020, EN 61000-3-2:2019, EN 61000-3-3:2013 + A1:2019
UM2944 - Rev 1 page 8/13
Revision history
Date
19-Oct-2021
Table 5. Document revision history
Revision
1 Initial release.
Changes
UM2944
UM2944 - Rev 1 page 9/13
UM2944
Contents
Contents
1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2
Electrical performance specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3
Input/output connector descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4 Board layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5 Board versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6 Regulatory compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
UM2944 - Rev 1 page 10/13
UM2944
List of tables
List of tables
Table 1. Electrical performance specification (Ta = 25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 2. Output voltage settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 3. STEVAL-1PS03A1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 4. STEVAL-IPS03A versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
UM2944 - Rev 1 page 11/13
UM2944
List of figures
List of figures
Figure 1. STEVAL-1PS03A evaluation board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. STEVAL-IPS03A circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. STEVAL-1PS03A top layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. STEVAL-1PS03A bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
UM2944 - Rev 1 page 12/13
UM2944
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of
Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks . All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2021 STMicroelectronics – All rights reserved
UM2944 - Rev 1 page 13/13
