SNVU768 December 2021 LM63440-Q1 , LM63460-Q1 , LM64440-Q1 , LM64460-Q1
Table 6-1 shows the bill of materials for the LM63460EVM-2MHZ and LM64460EVM-2MHZ EVMs. Note that the main BOM difference between the two EVM variants is the IC (U1). The LM63460-Q1 has an RT pin for resistor-adjustable switching frequency and allows external clock synchronization by AC coupling to its EN/SYNC pin. Conversely, the LM64460-Q1 has a default switching frequency of 2.1 MHz and has a MODE/SYNC pin for synchronization and operating mode configuration. Placement of either C20 or R9 accommodates this difference in functionality on a shared PCB design.
| REF DES | QTY | VALUE | DESCRIPTION | PACKAGE | PART NUMBER | MANUFACTURER | |
|---|---|---|---|---|---|---|---|
| C1, C9 | 2 | 1 µF | CAP, CERM, 1 µF, 16 V, 10%, X7R, 0603 | 0603 | C0603C105K4RACAUTO | Kemet | |
| C2, C3, C4, C5 | 4 | 2.2 µF | CAP, CERM, 2.2 µF, 50 V, 10%, X7R 0805 | 0805 | CGA4J3X7R1H225K125AB | TDK | |
| C6, C7 | 2 | 0.47 µF | CAP, CERM, 0.47 µF, 50 V, 10%, X7R, 0603 | 0603 | CGA3E3X7R1H474K080AE | TDK | |
| C8 | 1 | 68 µF | 68 µF, 50 V, aluminum electrolytic cap | 1210 | EEE-FN1H680XL | Panasonic | |
| C9, C10, C11 | 3 | 47 µF | CAP, CERM, 47 µF, 10 V, 20%, X7S, 1210 | 1210 | CGA6P1X7S1A476M250AC | TDK | |
| C13, C14 | 2 | 22 nF | CAP, CERM, 22 nF, 50 V, 10%, X7R, 0402 | 0402 | Std | Std | |
| C15, C16 | 2 | 10 µF | CAP, CERM, 10 µF, 50 V, X7R, 1210 | 1210 | CNA6P1X7R1H106K250AE | TDK | |
| C17 | 1 | 0.1 µF | CAP, CERM, 0.1 µF, 10 V, 10%, X7R, 0402 | 0402 | Std | Std | |
| C20 | BSR173-001 | 1 | 1 nF | CAP, CERM, 1 nF, 25 V, 10%, X7R, 0402 | 0402 | Std | Std |
| H1, H2, H3, H4 | 4 | – | Standoff, Hex, 0.5"L, #4-40, Nylon | – | 1902C | Keystone | |
| H5, H6, H7, H8 | 4 | – | Screw, Pan Head, 4-40, 3/8", Nylon | – | NY PMS 440 0038 PH | B&F Fastener Supply | |
| J1, J2 | 2 | – | Terminal block 2 POS 5 mm, TH | – | TSW-110-07-G-S | Phoenix Contact | |
| J3 | 1 | – | Header, 100 mil, 10 × 1, Gold, TH | – | TSW-110-07-G-S | Samtec | |
| L1 | 1 | 1 µH | Shielded power inductor | – | XGL4020-102MEC | Coilcraft | |
| L2 | 1 | 0.76 µH | Shielded power inductor | – | XGL4030-761MEC | Coilcraft | |
| R1 | 1 | 0 Ω | RES, 0 Ω, 5%, 0.1 W, 0603 | 0603 | Std | Std | |
| R2, R3, R10 | 3 | 100 kΩ | RES, 100 kΩ, 1%, 0.063 W, 0402 | 0402 | Std | Std | |
| R4 | 1 | 1 Ω | RES, 1 Ω, 1%, 0.063 W, 0402 | 0402 | Std | Std | |
| R5 | 1 | 10 Ω | RES, 10 Ω, 1%, 0.063 W, 0402 | 0402 | Std | Std | |
| R7 | 1 | 24.9 kΩ | RES, 24.9 kΩ, 1%, 0.0.063 W, 0402 | 0402 | Std | Std | |
| R8 | 1 | 255 kΩ | RES, 255 kΩ, 1%, 0.0.063 W, 0402 | 0402 | Std | Std | |
| R9 | BSR173-002 | 1 | 0 Ω | RES, 0 Ω, 5%, 0.1 W, 0402 | 0402 | Std | Std |
| R11 | BSR173-001 | 1 | 6.04 kΩ | RES, 6.04 Ω, 1%, 0.063 W, 0402 | 0402 | Std | Std |
| BSR173-002 | 1 | 100 kΩ | RES, 100 kΩ, 1%, 0.063 W, 0402 | 0402 | Std | Std | |
| SH-J3 | 1 | – | Shunt, 100 mil, gold plated, black | Shunt 2 pos. 0.1" | 881545-2 | TE Connectivity | |
| TP1, TP2, TP3, TP4 | 4 | – | Test point, miniature, SMT | – | 5019 | Keystone | |
| U1 | BSR173-001 | 1 | – | 36-V, 6-A buck converter with EN/SYNC and RT | VQFN-FCRLF (22) | LM63460AASQRYFRQ1 | Texas Instruments |
| BSR173-002 | 36-V, 6-A buck converter with EN and MODE/SYNC | LM64460APPQRYFRQ1 | |||||