SLUU240B January   2006  – March 2022 TPS51120

 

  1.   Trademarks
  2. 1Description
  3. 2Electrical Performance
  4. 3Schematic
  5. 4Test Setup and Results
    1. 4.1 Test Setup
    2. 4.2 Test Procedure
    3. 4.3 Start-Up Performance
    4. 4.4 Transient Performance
  6. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Skip Mode and Faults Disable Selection
    3. 5.3 Output Voltage Setting Selection
    4. 5.4 Control Scheme Selection
  7. 6EVM Assembly Drawing and PCB Layout
  8. 7List of Materials
  9. 8References
  10. 9Revision History

7 List of Materials

Reference Designator QTY Description Size Mfr Part Number
— 2 Shunt,100 mil, Black 0.100 3M 929950-00
C1, C24 0 Capacitor,Ceramic 1210 Any Any
C13 1 Capacitor,Ceramic, 1 mF,6.3 V, BJ, 20% 0805 TDK C2012X5R0J105K
C16, C17 2 Capacitor,Ceramic, 10 mF,6.3 V, BJ, 20% 0805 TDK C2012X5R0J106K
C2, C3, C25, C26 4 Capacitor,Ceramic, 10 mF,25 V, BJ , 20% 1210 Taiyo Yuden TMK325BJ106MM
C4, C7, C9, C11, C12, C14, C15, C19,C27 0 Capacitor,Ceramic 0805 Any Any
C5, C18, C22 3 Capacitor,Ceramic, 1 nF, 50 V, BJ, 20% 0805 Std Std
C6, C23 2 Capacitor,Ceramic, 0.1 mF,50 V, BJ, 20% 0805 Std Std
C8, C10, C20, C21 4 Capacitor,POSCAP, 150 mF, 6.3 V, 55 mW, 20% 7343 SANYO 6TPB150ML
CN1, CN2 2 Adaptor, 3.5-mm probe clip (or 131-5031-00) 0.2 Tektronix 131-4244-00
D1, D4 0 Diode,Schottky, 0.5 A, 30 V SOD-123 Any Any
D2, D3 0 Diode,Schottky, 1 A, 30 V SMA Any Any
JP1 1 Header, 2 × 4 pin,100-mil spacing (36-pin strip) 0.20 × 0.40 inch Sullins PTC36DAAN
JP2 1 Header, 2 × 3 pin, 100-mil spacing (36-pin strip) 0.20 × 0.30 inch Sullins PTC36DAAN
L1 1 Inductor,4.7 μH, 12.8 A, 8.8 mW 0.496 × 0.532 inch Toko FDA1254-4R7M
L2 1 Inductor,2.2 μH, 17.8 A, 4.5 mW 0.496 × 0.532 inch Toko FDA1254-2R2M
Q1, Q4 2 MOSFET, N-ch, 30 V, 11 A, 9.1 mW SO8 IR IRF7821
Q2, Q3 2 MOSFET, N-ch, 30 V, 16 A, 4.0 mW SO8 IR IRF7832

R1, R2, R5, R8, R9, R11–R15, R20–R22, R24, R25, R27, R31, R32

 0 Resistor,Chip 0805 Any Any
R10, R26 2 Resistor,Chip, 100 kW,1/10W, 1% 0805 Std Std
R16, R23 0 Resistor,Metal Strip, 1 W, 1% 2512 Std Std
R17 1 Resistor,Chip, 3.6 kW,1/10W, 1% 0805 Std Std
R19 1 Resistor,Chip, 3.3 kW,1/10W, 1% 0805 Std Std
R29 1 Resistor,Chip, 17.2 kW,1/10W, 1% 0805 Std Std
R3, R6, R28 3 Resistor,Chip, 7.5 kW,1/10W, 1% 0805 Std Std
R4 1 Resistor,Chip, 30 kW,1/10W, 1% 0805 Std Std
R7, R18, R30 3 Resistor,Chip, 5.1 W,1/10W, 1% 0805 Std Std
SW1, SW2, SW3, SW4 4 Switch,ON-ON Mini Toggle 0.28 × 0.18 inch Nikkai G12AP
TP1–TP5 5 Pin,Probe monitor 0.12(D) × 0.4 inch MillMax or MAC8 LC-2-S
U1 1 IC, Dual Current Mode, Sync. Step-down Controller QFN32 TI TPS51120RHB
VO1, VO2,VO1_GND1, VO2_GND1, VBAT_GND1,VBAT1 6 Pin, Wiring Terminal 0.12(D) × 0.4 inch MillMax or MAC8 3183-2-00-15-00-00-080 or WT-3-1