SLVU251B June   2008  – February 2022 TPS51220

 

  1.   Trademarks
  2. 1Description
  3. 2Electrical Performance
  4. 3Schematic
  5. 4Test Setup and Procedure
    1. 4.1 Test Setup
    2. 4.2 Test Procedure
  6. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Skip Mode and Control Scheme Selection
    3. 5.3 Current-Sensing Selection
    4. 5.4 Overcurrent Limit and Discharge Selection
    5. 5.5 Control Mode and Protection Selection
    6. 5.6 Soft-Start Setting Selection
    7. 5.7 Output Voltage Adjustment
  7. 6Bill of Materials
  8. 7EVM Assembly Drawing and PCB Layout
  9. 8Reference
  10. 9Revision History

6 Bill of Materials

Table 6-1 Bill of Materials
Reference Qty Description Size Mfr Part Number
C1, C14, C26 3 Capacitor, Ceramic, 10 nF, 50V, X7R, 20% 0603 Std Std
C2, C3 2 Capacitor, SPCAP, 150 μF, 6.3-V, 15-mΩ, 20% 7343 Panasonic EEFCX0J151R
C4, C5, C6, C21, C22, C23 6 Capacitor, Ceramic, 0.1 μF, 50V, X7R, 20% 0603 TDK C1608X7R1H104K
C7, C16, C20, C27 4 Capacitor, Ceramic, 100 pF, 50V, CH, 5% 0603 TDK C1608CH1H101J
C8, C33 0 Capacitor, Ceramic, 10 μF, 25V, X7R, 20% 1210 – –
C9, C18, C19, C32 4 Capacitor, Ceramic, 10 μF, 25V, X7R , 20% 1210 Murata GRM32DR71E106KA
C10 1 Capacitor, Ceramic, 2.2F, 6.3V, X7R (or X5R), 10% 0603 Murata
TDK		 GRM188R70J225KA
C1608X5R0J225K
C11 0 Capacitor, Ceramic 0603 – –
C12 1 Capacitor, Ceramic, 47pF, 50V, CH, 5% 0603 TDK C1608CH1H470J
C13 1 Capacitor, Ceramic, 0.22F, 50V, X7R, 10% 0630 TDK C1608X7R1E224K
C15 1 Capacitor, Ceramic, 10F, 10V, X7R (or X5R), 10% 0805 Murata
TDK		 GRM21BR71A106K
C2012X5R0J106K
C17 0 Capacitor, Ceramic 0603 – –
C24, C29 0 Capacitor 7343 – –
C25, C30 2 Capacitor, SPCAP, 220F, 4-V, 15-mΩ, 20% 7343 Panasonic EEFCX0G221R
C28 0 Capacitor, Ceramic 0603 – –
C31 0 Capacitor, Ceramic 0603 – –
D1, D2 0 Diode 0.1 × 0.049 inch – –
L1 1 Inductor, 4.7μH, 10.2A, 12.9-mΩ 0.4 × 0.4 inch TOKO FDV1040-4R7M
L2 1 Inductor, 3.3μH, 10.7A, 10.5-mΩ 0.4 × 0.4 inch TOKO FDV1040-3R3M
Q1, Q3 2 MOSFET, N-ch, 30-V, 14-A, 9.7-mΩ SO8 TI CSD17307Q5A
Q2, Q4 2 MOSFET, N-ch, 30-V, 21-A, 4.5-mΩ SO8 TI CSD17310Q5A
R1, R4, R9, R17, R22, R34, R35,R36, R37 9 Resistor, Chip, 0Ω, 1/10W, 1% 0603 Std Std
R2 1 Resistor, Chip, 120kΩ, 1/10W, 1% 0603 Std Std
R3 1 Resistor, Chip, 30kΩ, 1/10W, 1% 0603 Std Std
R5, R23 2 Resistor, Chip 49.9 or 51Ω, 1/10W, 1% 0603 Std Std
R6 0 Resistor, Chip, mΩ, 1 W, 1% 3712 Std Std
R7, R25 0 Resistor, Chip 0603 Std Std
R8 1 Resistor, Chip, 7.5kΩ, 1/10W, 1% 0603 Std Std
R10 0 Resistor, Chip 0603 Std Std
R11, R14 2 Resistor, Chip, 470kΩ, 1/10W, 1% 0603 Std Std
R12, R13 2 Resistor, Chip, 10kΩ, 1/10W, 1% 0603 Std Std
R15 1 Resistor, Chip, 360kΩ, 1/10W, 1% 0603 Std Std
R16 0 Resistor, Chip 0603 Std Std
R18, R28 2 Resistor, Chip, 5.6kΩ, 1/10W, 1% 0603 Std Std
R19, R26 0 Resistor, Chip 0603 Std Std
R20 0 Resistor, Chip, mΩ, 1 W, 1% 3712 Std Std
R21 1 Resistor, Chip, 62kΩ, 1/10W, 1% 0603 Std Std
R24 1 Resistor, Chip, 27kΩ, 1/10W, 1% 0603 Std Std
R27 0 Resistor, Chip 0603 Std Std
R32 0 Resistor, Chip 0603 Std Std
R29 1 Resistor, Chip, 4.7kΩ, 1/10W, 1% 0603 Std Std
R30, R33 2 Resistor, Chip, 15.4Ω, 1/10W, 1% 0603 Std Std
R31 0 Resistor, Chip 0603 Std Std
R38 1 Resistor, Chip, 0Ω, 1/10W, 1% 0603 Std Std
R39 1 Resistor, Chip, 0Ω, 1/10W, 1% 0603 Std Std
S1, S2, S3 3 Switch, ON-ON Mini Toggle 0.28 × 0.18" Nikkai G12AP
J1, J2 2 Terminal Block, 2-pin, 15A, 5,1mm 0.40 × 0.35inch OST ED1609
JP1, JP2, JP3, JP4 4 Header, 2×4-pin, 100mil spacing (36-pin strip) 0.20 × 0.40inch Sullins PTC36DAAN
— 4 Shunt, 100-mil, Black 0.100 Std Std
TP1, TP2 2 Pin, Probe monitor (VOUT1) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP3, TP10, TP11 3 Pin, Probe monitor (EN, ENx) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP4, TP17 2 Pin, Probe monitor (SW-node) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP5 0 Pin, Probe monitor (IMON) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP6, TP18 2 Pin, Probe monitor (PGOOD) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP7, TP8, TP9 3 Pin, Probe monitor (LDO) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP12, TP13 2 Pin, Probe monitor (VOUT2) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP14, TP15 2 Pin, Probe monitor (VIN) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
TP16 0 Pin, Probe monitor (IMON) 0.12(D) × 0.4 inch Keystone or MAC8 5002 LC-2-S
U1 1 IC, Dual Peak Current Mode, Sync. Step-down Controller QFN32 TI TPS51220RHB
VIN, GNDI 2 Pin, Wiring Terminal (VIN) 0.12(D) × 0.4 inch Mill Max or MAC8 3183-2-00-15-00-00-080 or WT-3-1
VOUT1, GND1, GND3 3 Pin, Wiring Terminal (VOUT1) 0.12(D) × 0.4 inch Mill Max or MAC8 3183-2-00-15-00-00-080 or WT-3-1
VOUT2, GND2, GND4 3 Pin, Wiring Terminal (VOUT2) 0.12(D) × 0.4 inch Mill Max or MAC8 3183-2-00-15-00-00-080 or WT-3-1
SYNC, GNDS 2 Pin, Wiring Terminal (SYNC) 0.12(D) × 0.4 inch Mill Max or MAC8 3183-2-00-15-00-00-080 or WT-3-1