IR3887 Evaluation Board User Manual (EVAL-3887-1VOUT)
User manual for the EV114-001 evaluation board featuring the IR3887 30A synchronous buck regulator, providing 1.0V output from a 12V input with programmable frequencies.
Overview
This design document provides technical specifications and operational instructions for the EV114-001 engineering evaluation board featuring the Infineon IR3887. The IR3887 is a 30A single-phase synchronous buck regulator housed in a 4mm x 5mm PQFN package. The board is configured for a 12V input and 1.0V output, supporting adjustable switching frequencies from 600kHz to 1200kHz. The manual includes a complete bill of materials (BOM), detailed circuit schematics, six-layer PCB layout diagrams, and performance waveforms for efficiency, thermal performance, and transient response.
Use Cases
- Evaluation of IR3887 synchronous buck regulator performance
- 12V to 1V point-of-load power supply design
- High-current DC-DC converter implementation
- Thermal and efficiency benchmarking for 30A power stages
Topics
Referenced Parts
Panasonic
13 5 R3, R5, R7, R20, R28 0 Panasonic ERJ-2GE0R00X Resistor 0.0 Ω 1/10 W 0402 SMD
Panasonic
21 3 R25, R33, R36 12.1 k Panasonic ERJ-2RKF1212X Resistor 12.1 kΩ 1/10 W 1% 0402
Panasonic
15 4 R10, R27, R35, R37 16.2 k Panasonic ERJ-2RKF1622X Resistor 16.2 kΩ 1/10 W 1% 0402
Taiyo Yuden
1 2 C2, C31 0.1 μF Taiyo Yuden TMK105BJ104KV-F Ceramic capacitor 0.1 μF 25 V
HCB138380D-151
Delta
HCB138380D-151 Inductor 150 nH, 75 A, 0.15 mΩ 12.4 mm x 8.3 mm, SMD
IR3887
Infineon
U1 IR3887 Infineon IR3887 30 A single input voltage, synchronous buck regulator
PCE3410CT-ND
Panasonic
PCE3410CT-ND Aluminum capacitor 330 μF 20% 25 V SMD
CRCW040220R0FKED
Vishay Dale
CRCW040220R0FKED Resistor 20.0 Ω 1/16 W 1% 0402 SMD
CRCW04022K49FKED
Vishay Dale
CRCW04022K49FKED Resistor 2.49 kΩ 1/16 W 1% 0402 SMD
CRCW04023K48FKED
Vishay Dale
CRCW04023K48FKED Resistor 3.48 kΩ 1/16 W 1% 0402 SMD
GRM188R61A106KE6
Murata
3 1 C5 10 μF Murata GRM188R61A106KE6
GRM188R61E475KE1
Murata
2 3 C4, C11, C51 4.7 μF Murata GRM188R61E475KE1
GRM21BR61E226ME4
Murata
22 μF Murata GRM21BR61E226ME4
PCE3410CT-ND
Panasonic
7 1 C21 330 μF Panasonic PCE3410CT-ND Aluminum capacitor 330 μF 20%
C2012X5R0J476M125
TDK
47 μF TDK C2012X5R0J476M125
IR3887
Infineon
26 1 U1 IR3887 Infineon IR3887 30 A single input voltage,
| C0402C102K3RACTU | Kemet | C0402C102K3RACTU Ceramic capacitor 1000 pF 25 V 10% X7R 0402 |
| C0402C221K5RACTU | Kemet | C0402C221K5RACTU Ceramic capacitor 220 pF 50 V 10% X7R 0402 |
| GRM188R61A106KE69D | Murata | GRM188R61A106KE69D Ceramic capacitor 10 μF 10 V 10% X5R 0603 |
| GRM188R61E475KE15D | Murata | GRM188R61E475KE15D Ceramic capacitor 4.7 μF 25 V 10% X5R 0603 |
| GRM21BR61E226ME44L | Murata | GRM21BR61E226ME44L Ceramic capacitor 22 μF 25 V 20% X5R 0805 |
| EEFSX0E471XE | Panasonic | EEF-SX0E471XE Aluminum capacitor poly 470 μF 20% 2.5 V SMD |
| ERJ-2GE0R00X | Panasonic | ERJ-2GE0R00X Resistor 0.0 Ω 1/10 W 0402 SMD |
| ERJ-2RKF1052X | Panasonic | ERJ-2RKF1052X Resistor 10.5 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF1212X | Panasonic | ERJ-2RKF1212X Resistor 12.1 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF1402X | Panasonic | ERJ-2RKF1402X Resistor 14.0 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF1622X | Panasonic | ERJ-2RKF1622X Resistor 16.2 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF2152X | Panasonic | ERJ-2RKF2152X Resistor 21.5 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF2432X | Panasonic | ERJ-2RKF2432X Resistor 24.3 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF2492X | Panasonic | ERJ-2RKF2492X Resistor 24.9 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF4992X | Panasonic | ERJ-2RKF4992X Resistor 49.9 kΩ 1/10 W 1% 0402 SMD |
| ERJ-2RKF7501X | Panasonic | ERJ-2RKF7501X Resistor 7.50 kΩ 1/10 W 1% 0402 SMD |
| MCR01MZPF1501 | Rohm | MCR01MZPF1501 Resistor 1.50 kΩ 1/16 W 1% 0402 SMD |
| C2012X5R0J476M125AC | TDK | C2012X5R0J476M125AC Ceramic capacitor 47 μF 6.3 V 20% X5R 0805 |
| TMK105BJ104KV-F | Taiyo Yuden | TMK105BJ104KV-F Ceramic capacitor 0.1 μF 25 V 10% X5R 0402 |
| C0402C102K3RACTU | Kemet | 5 2 C10, C50 1000 pF Kemet C0402C102K3RACTU Ceramic capacitor 1000 pF 25 V |
| C0402C221K5RACTU | Kemet | 4 1 C6 220 pF Kemet C0402C221K5RACTU Ceramic capacitor 220 pF 50 V |
| EEFSX0E471XE | Panasonic | 9 1 C45 470 μF Panasonic EEF-SX0E471XE Aluminum capacitor poly 470 μF |
| ERJ-2GE0R00X | Panasonic | 13 5 R3, R5, R7, R20, R28 0 Panasonic ERJ-2GE0R00X Resistor 0.0 Ω 1/10 W 0402 SMD |
| ERJ-2RKF1052X | Panasonic | 20 2 R24, R32 10.5 k Panasonic ERJ-2RKF1052X Resistor 10.5 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF1212X | Panasonic | 21 3 R25, R33, R36 12.1 k Panasonic ERJ-2RKF1212X Resistor 12.1 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF1402X | Panasonic | 22 2 R26, R34 14 k Panasonic ERJ-2RKF1402X Resistor 14.0 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF1622X | Panasonic | 15 4 R10, R27, R35, R37 16.2 k Panasonic ERJ-2RKF1622X Resistor 16.2 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF2152X | Panasonic | 23 1 R38 21.5 k Panasonic ERJ-2RKF2152X Resistor 21.5 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF2432X | Panasonic | 14 1 R9 24.3 k Panasonic ERJ-2RKF2432X Resistor 24.3 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF2492X | Panasonic | 24 1 R39 24.9 k Panasonic ERJ-2RKF2492X Resistor 24.9 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF4992X | Panasonic | 25 1 R42 49.9 k Panasonic ERJ-2RKF4992X Resistor 49.9 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF4992X | Panasonic | 11 2 R1, R4 49.9 k Panasonic ERJ-2RKF4992X Resistor 49.9 kΩ 1/10 W 1% 0402 |
| ERJ-2RKF7501X | Panasonic | 12 1 R2 7.5 k Panasonic ERJ-2RKF7501X Resistor 7.50 kΩ 1/10 W 1% 0402 |
| MCR01MZPF1501 | Rohm | 17 2 R21, R29 1.5 k Rohm MCR01MZPF1501 Resistor 1.50 kΩ 1/16 W 1% 0402 |
| TMK105BJ104KV-F | Taiyo Yuden | 1 2 C2, C31 0.1 μF Taiyo Yuden TMK105BJ104KV-F Ceramic capacitor 0.1 μF 25 V |
| HCB138380D-151 | Delta | HCB138380D-151 Inductor 150 nH, 75 A, 0.15 mΩ 12.4 mm x 8.3 mm, SMD |
| IR3887 | Infineon | U1 IR3887 Infineon IR3887 30 A single input voltage, synchronous buck regulator |
| PCE3410CT-ND | Panasonic | PCE3410CT-ND Aluminum capacitor 330 μF 20% 25 V SMD |
| CRCW040220R0FKED | Vishay Dale | CRCW040220R0FKED Resistor 20.0 Ω 1/16 W 1% 0402 SMD |
| CRCW04022K49FKED | Vishay Dale | CRCW04022K49FKED Resistor 2.49 kΩ 1/16 W 1% 0402 SMD |
| CRCW04023K48FKED | Vishay Dale | CRCW04023K48FKED Resistor 3.48 kΩ 1/16 W 1% 0402 SMD |
| GRM188R61A106KE6 | Murata | 3 1 C5 10 μF Murata GRM188R61A106KE6 |
| GRM188R61E475KE1 | Murata | 2 3 C4, C11, C51 4.7 μF Murata GRM188R61E475KE1 |
| GRM21BR61E226ME4 | Murata | 22 μF Murata GRM21BR61E226ME4 |
| PCE3410CT-ND | Panasonic | 7 1 C21 330 μF Panasonic PCE3410CT-ND Aluminum capacitor 330 μF 20% |
| C2012X5R0J476M125 | TDK | 47 μF TDK C2012X5R0J476M125 |
| IR3887 | Infineon | 26 1 U1 IR3887 Infineon IR3887 30 A single input voltage, |