SNVA998 September   2020 LP8732-Q1 , LP87522-Q1

 

  1.   Trademarks
  2. 1Design Parameters
  3. 2Power Solution
  4. 3Sequencing
    1. 3.1 Startup
    2. 3.2 Shutdown
  5. 4Schematic
  6. 5Software Drivers
  7. 6Recommended External Components
  8. 7Measurements
  9. 8Summary
  10. 9References

6 Recommended External Components

Table 6-1 shows the recommended external components to use in this solution with the LP87522E-Q1, LP873244-Q1, and TPS62813-Q1. It also shows the total solution size, including the PMIC device and the external components. Note this is done for the minimum solution size in mind and depending on the requirements the actual components can be different. Please see application note Stability Considerations for LP8756x-Q1 and LP8752x-Q1, LP8752x-Q1 datasheet, LP8732xx-Q1 datasheet, and TPS6281x-Q1 datasheet for more details.

Table 6-1 Bill of Materials
COUNTVENDORPART NUMBERSYSTEM COMPONENTW (mm)L (mm)H (mm)UNIT AREA(1)TOTAL BOARD AREA(1)
1 TI LP87522E-Q1 Configurable 4-phase Buck 4.00 4.50 0.90 27.50 27.50
4 TOKO DFE252012PD-R47M LP8752x Inductor 0.47uH, Imax 4.0A, Rdc typ 21mOhm 2.50 2.00 1.20 10.50 42.00
4 Murata GCM21BR71A106KE22 LP8752x SMPS Input Capacitor 10uF, 10V, 10% 2.00 1.25 1.25 6.75 27.00
8 Murata GCM21BD70J226ME35 LP8752x SMPS Output Capacitor 22uF, 10V, 10% 2.00 1.25 1.25 6.75 54.00
1 Murata GCM155R71C104KA55D LP8752x Input Capacitor 0.1uF, 16V, 10% 1.00 0.50 0.50 3.00 3.00
4 TDK CGA2B2C0G1H391J050BA LP8752x Snubber capacitor, 390pF 1.00 0.50 0.50 3.00 12.00
4 Vishay-Dale CRCW04023R90JNED LP8752x Snubber resistor, 3R9 1.00 0.50 0.50 3.00 12.00
1 TI LP873244-Q1 Configurable 2 Bucks and 2 LDOs 5.00 5.00 0.90 36.00 36.00
2 TOKO DFE252012PD-R47M LP8732x Inductor 0.47uH, Imax 4.0A, Rdc typ 21mOhm 2.50 2.00 1.20 10.50 21.00
2 Murata GCM21BR71A106KE22 LP8732x SMPS Input Capacitor 10uF, 10V, 10% 2.00 1.25 1.25 6.75 13.50
4 Murata GCM21BD70J226ME35 LP8732x SMPS Output Capacitor 22uF, 10V, 10% 2.00 1.25 1.25 6.75 27.00
2 Murata GCM188R70J225KE22 LP8732x LDO Input Capacitor 2.2uF, 6.3V, 10% 1.60 0.80 0.90 4.68 9.36
2 Murata GCM155C71A105KE38 LP8732x LDO Output Capacitor 1.0uF, 16V, 10% 1.00 0.50 0.50 3.00 6.00
1 Murata GCM155R71C104KA55D LP8732x Input Capacitor 0.1uF, 16V, 10% 1.00 0.50 0.50 3.00 3.00
1 TI TPS62813-Q1 Adjustable Step-down converter 3.00 2.00 0.90 12.00 12.00
4 Setup resistors for TPS62813-Q1 output voltage etc. 1.00 0.50 0.50 3.00 12.00
1 TOKO DFE252012PD-R47M Inductor 0.47uH, Imax 4.0A, Rdc typ 21mOhm 2.50 2.00 1.20 10.50 10.50
1 Murata GCM21BD70J226ME35 Input Capacitor 22uF, 10V, 10% 2.00 1.25 1.25 6.75 6.75
2 Murata GCM21BD70J226ME35 Output Capacitor 22uF, 10V, 10% 2.00 1.25 1.25 6.75 13.50
TOTAL348.11 mm2
Routing area calculated with 0.3 routing factor149.19 mm2
Total area497.30 mm2
(1) Assuming 1 mm keep-out around each component, and multiplying by component count