Infineon EVAL_3888_1Vout Evaluation Board User Manual
User manual for the EVAL_3888_1Vout evaluation board featuring the IR3888 25A synchronous buck regulator. Includes schematic, BOM, and PCB layout.
Overview
This design document provides technical specifications and operational instructions for the EVAL_3888_1Vout engineering evaluation board. The board utilizes the Infineon IR3888 synchronous buck converter to deliver a 1.0 V output at up to 25 A from a 12 V input. The manual includes a complete bill of materials, circuit schematic, and six-layer PCB layout diagrams. Key features of the IR3888 addressed include programmable switching frequencies from 600 kHz to 2 MHz, internal digital soft-start, Power Good signaling, and thermally compensated overcurrent protection. Typical operating waveforms and connection instructions for testing are also provided.
Use Cases
- Evaluating the performance of the IR3888 synchronous buck regulator
- Designing high-current point-of-load power supplies
- Implementing 12V to 1.0V DC-DC power conversion
- Referencing component selection and layout for IR3888-based designs
Topics
Referenced Parts
Murata
6 2 C10, C50 1000 pF Murata GRM155R61E102KA01D Ceramic capacitor, 1000 pF, 25
Murata
1 3 C2, C31, C32 0.1 μF Murata GRM155R71E104KE14J Ceramic capacitor, 0.1 μF, 25 V,
Murata
2 3 C4, C11, C51 4.7 μF Murata GRM188R61E475KE15D Ceramic capacitor, 4.7 μF, 25 V,
AH3740-150k
ITG
Inductor, 150 nH, Isat = 60 A, 9.6 mm x 6.4 mm x 10 mm, DCR = 0.145 mΩ, SMD
IR3888
Infineon
Infineon IR3888 25 A single input voltage, synchronous buck regulator
RL1632R-1R00-F
Susumu
Resistor, 1 Ω, 1%, 1/2 W, 1206, SMD
CRCW040220R0FKED
Vishay Dale
Resistor, 20.0 Ω, 1/16 W, 1%, 0402, SMD
CRCW04022K49FKED
Vishay Dale
Resistor, 2.49 kΩ, 1/16 W, 1%, 0402, SMD
CRCW04023K48FKED
Vishay Dale
Resistor, 3.48 kΩ, 1/16 W, 1%, 0402, SMD
PCE3410CT-ND
Panasonic
Aluminum capacitor, 330 μF, 20%, 25 V, SMD
PCE3410CT-ND
Panasonic
8 1 C21 330 μF Panasonic PCE3410CT-ND Aluminum capacitor, 330 μF,
IR3888
Infineon
27 1 U1 IR3888 Infineon IR3888 25 A single input voltage,
| GRM155R61E102KA01D | Murata | Ceramic capacitor, 1000 pF, 25 V, 10%, X5R, 0402 |
| GRM155R71E104KE14J | Murata | Ceramic capacitor, 0.1 μF, 25 V, 10%, X7R, 0402 |
| GRM155R71H221KA01D | Murata | Ceramic capacitor, 220 pF, 50 V, 10%, X7R, 0402 |
| GRM188C81C106MA73D | Murata | Ceramic capacitor, 10 μF, 16 V, X6S, 0603 |
| GRM188R61E475KE15D | Murata | Ceramic capacitor, 4.7 μF, 25 V, 10%, X5R, 0603 |
| GRM188R71H681KA01D | Murata | Ceramic capacitor, 680 pF, 50 V, X7R, 0603 |
| GRM21BR61E226ME44L | Murata | Ceramic capacitor, 22 μF, 25 V, 20%, X5R, 0805 |
| EEF-SX0D471XE | Panasonic | Polymer aluminum capacitor, 470 μF, 20%, 2 V, SMD |
| ERJ-2GE0R00X | Panasonic | Resistor, 0.0 Ω, 1/10 W, 0402, SMD |
| ERJ-2GEJ152X | Panasonic | Resistor, 1.5 kΩ, 5%, 1/10 W, 0402, SMD |
| ERJ-2RKF1052X | Panasonic | Resistor, 10.5 kΩ, 1/10 W, 1%, 0402, SMD |
| ERJ-2RKF1212X | Panasonic | Resistor, 12.1 kΩ, 1/10 W, 1%, 0402, SMD |
| ERJ-2RKF1402X | Panasonic | Resistor, 14.0 kΩ, 1/10 W, 1%, 0402, SMD |
| ERJ-2RKF1622X | Panasonic | Resistor, 16.2 kΩ, 1/10 W, 1%, 0402, SMD |
| ERJ-2RKF2432X | Panasonic | Resistor, 24.3 kΩ, 1%, 1/10 W, 0402, SMD |
| ERJ-2RKF4992X | Panasonic | Resistor, 49.9 kΩ, 1/10 W, 1%, 0402, SMD |
| ERJ-2RKF7501X | Panasonic | Resistor, 7.50 kΩ, 1/10 W, 1%, 0402, SMD |
| C2012X5R0J476M125AC | TDK | Ceramic capacitor, 47 μF, 6.3 V, 20%, X5R, 0805 |
| GRM155R61E102KA01D | Murata | 6 2 C10, C50 1000 pF Murata GRM155R61E102KA01D Ceramic capacitor, 1000 pF, 25 |
| GRM155R71E104KE14J | Murata | 1 3 C2, C31, C32 0.1 μF Murata GRM155R71E104KE14J Ceramic capacitor, 0.1 μF, 25 V, |
| GRM155R71H221KA01D | Murata | 4 1 C6 220 pF Murata GRM155R71H221KA01D Ceramic capacitor, 220 pF, 50 V, |
| GRM188C81C106MA73D | Murata | 3 1 C5 10 μF Murata GRM188C81C106MA73D Ceramic capacitor, 10 μF, 16 V, |
| GRM188R61E475KE15D | Murata | 2 3 C4, C11, C51 4.7 μF Murata GRM188R61E475KE15D Ceramic capacitor, 4.7 μF, 25 V, |
| GRM188R71H681KA01D | Murata | 5 1 C8 680 pF Murata GRM188R71H681KA01D Ceramic capacitor, 680 pF, 50 V, |
| GRM21BR61E226ME44L | Murata | 22 μF Murata GRM21BR61E226ME44L Ceramic capacitor, 22 μF, 25 V, |
| EEF-SX0D471XE | Panasonic | 10 1 C45 470 μF Panasonic EEF-SX0D471XE Polymer aluminum capacitor, |
| ERJ-2GE0R00X | Panasonic | 14 1 R3 0 Panasonic ERJ-2GE0R00X Resistor 0.0 Ω, 1/10W, 0402, |
| ERJ-2GE0R00X | Panasonic | 0 Panasonic ERJ-2GE0R00X Resistor, 0.0 Ω, 1/10 W, 0402, |
| ERJ-2GEJ152X | Panasonic | 21 3 R21, R29, R37 1.5 k Panasonic ERJ-2GEJ152X Resistor, 1.5 kΩ, 5%, 1/10 W, |
| ERJ-2RKF1052X | Panasonic | 24 2 R24, R32 10.5 k Panasonic ERJ-2RKF1052X Resistor, 10.5 kΩ, 1/10 W, 1%, |
| ERJ-2RKF1212X | Panasonic | 25 2 R25,R33 12.1 k Panasonic ERJ-2RKF1212X Resistor, 12.1 kΩ, 1/10 W, 1%, |
| ERJ-2RKF1402X | Panasonic | 26 2 R26, R34 14 k Panasonic ERJ-2RKF1402X Resistor, 14.0 kΩ, 1/10 W, 1%, |
| ERJ-2RKF1622X | Panasonic | 16 2 R27, R35 16.2 k Panasonic ERJ-2RKF1622X Resistor, 16.2 kΩ, 1/10 W, 1%, |
| ERJ-2RKF1622X | Panasonic | 18 2 R10, R12 16.4 k Panasonic ERJ-2RKF1622X Resistor, 16.2 kΩ, 1/10 W, 1%, |
| ERJ-2RKF2432X | Panasonic | 17 2 R9, R14 24.3 k Panasonic ERJ-2RKF2432X Resistor, 24.3 kΩ, 1%, 1/10 W, |
| ERJ-2RKF4992X | Panasonic | 12 2 R1, R4 49.9 k Panasonic ERJ-2RKF4992X Resistor, 49.9 kΩ, 1/10 W, 1%, |
| ERJ-2RKF7501X | Panasonic | 13 1 R2 7.5 k Panasonic ERJ-2RKF7501X Resistor, 7.50 kΩ, 1/10 W, 1%, |
| C2012X5R0J476M125AC | TDK | 47 μF TDK C2012X5R0J476M125AC Ceramic capacitor, 47 μF, 6.3 V, |
| AH3740-150k | ITG | Inductor, 150 nH, Isat = 60 A, 9.6 mm x 6.4 mm x 10 mm, DCR = 0.145 mΩ, SMD |
| IR3888 | Infineon | Infineon IR3888 25 A single input voltage, synchronous buck regulator |
| RL1632R-1R00-F | Susumu | Resistor, 1 Ω, 1%, 1/2 W, 1206, SMD |
| CRCW040220R0FKED | Vishay Dale | Resistor, 20.0 Ω, 1/16 W, 1%, 0402, SMD |
| CRCW04022K49FKED | Vishay Dale | Resistor, 2.49 kΩ, 1/16 W, 1%, 0402, SMD |
| CRCW04023K48FKED | Vishay Dale | Resistor, 3.48 kΩ, 1/16 W, 1%, 0402, SMD |
| PCE3410CT-ND | Panasonic | Aluminum capacitor, 330 μF, 20%, 25 V, SMD |
| PCE3410CT-ND | Panasonic | 8 1 C21 330 μF Panasonic PCE3410CT-ND Aluminum capacitor, 330 μF, |
| IR3888 | Infineon | 27 1 U1 IR3888 Infineon IR3888 25 A single input voltage, |