SNVAA47 May   2022 LP8732-Q1 , LP87521-Q1 , LP87524-Q1 , LP87561-Q1 , LP87562-Q1

 

  1. 1Abstract
    1.     Trademarks
  2. 1Design Parameters
  3. 2Power Solution
  4. 3Sequencing
    1. 3.1 Startup, Application Processor
    2. 3.2 Shutdown, Application Processor
    3. 3.3 Startup, Safety
    4. 3.4 Shutdown, Safety
    5. 3.5 Startup, RTC
    6. 3.6 Shutdown, RTC
  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 LP8756x-Q1, LP8752x-Q1, LP873248-Q1, and TPS74501-Q1. It also shows the total solution size, including the PMIC device and the external components.

Table 6-1 Bill of Materials
COUNTVENDORPART NUMBERSYSTEM COMPONENTW (mm)L (mm)H (mm)UNIT AREA(1)TOTAL BOARD AREA(1)
4 TI LP875x-Q1 Configurable 4-phase Buck 4.00 4.50 0.90 27.50 110.00
16 Murata DFE252012PD-R47M LP875x Inductor 0.47 µH, Imax 4.0A, Rdc typ 21mOhm 2.50 2.00 1.20 10.50 168.00
16 Murata GCM21BR71A106KE22 LP875x SMPS Input Capacitor 10µF, 10 V, 10% 2.00 1.25 1.25 6.75 108.00
32 Murata GCM21BD70J226ME35 LP875x SMPS Output Capacitor 22 µF, 10 V, 10% 2.00 1.25 1.25 6.75 216.00
4 Murata GCM155R71C104KA55D LP875x Input Capacitor 0.1µF, 16 V, 10% 1.00 0.50 0.50 3.00 12.00
16 TDK CGA2B2C0G1H391J050BA LP875x Snubber capacitor, 390 pF 1.00 0.50 0.50 3.00 48.00
16 Vishay-Dale CRCW04023R90JNED LP875x Snubber resistor, 3R9 1.00 0.50 0.50 3.00 48.00
1 TI LP8732-Q1 Configurable 2 Bucks and 2 LDOs 5.00 5.00 0.90 36.00 36.00
2 Murata DFE252012PD-R47M LP8732-Q1 Inductor 0.47 µH, Imax 4.0 A, Rdc typ 21mOhm 2.50 2.00 1.20 10.50 21.00
2 Murata GCM21BR71A106KE22 LP8732-Q1 SMPS Input Capacitor 10 µF, 10 V, 10% 2.00 1.25 1.25 6.75 13.50
4 Murata GCM21BD70J226ME35 LP8732-Q1 SMPS Output Capacitor 22 µF, 10 V, 10% 2.00 1.25 1.25 6.75 27.00
2 Murata GRT155C71A225KE13 LP8732-Q1 LDO Input Capacitor 2.2 µF, 6.3 V, 10% 1.00 0.50 0.50 3.00 6.00
2 Murata GCM155C71A105KE38 LP8732-Q1 LDO Output Capacitor 1.0 µF, 16 V, 10% 1.00 0.50 0.50 3.00 6.00
1 Murata GCM155R71C104KA55D LP8732-Q1 Input Capacitor 0.1 µF, 16 V, 10% 1.00 0.50 0.50 3.00 3.00
3 TI TPS74501-Q1 Low Dropout Regulator 2.00 2.00 1.00 9.00 27.00
3 Murata GCM188R71C105KA64D LDO Input Capacitor 1 µF 1.00 0.50 0.50 3.00 9.00
3 Murata GRT155C71A225KE13 LDO Output Capacitor 2.2 µF, 6.3 V, 10% 1.00 0.50 0.50 3.00 9.00
6 LDO Set resistors 1.00 0.50 0.50 3.00 18.00
3 TDK CGA2B3X7R1H103K050BB LDO CFF Capacitor 10 nF, 50 V, 10% 1.00 0.50 0.50 3.00 9.00
TOTAL894.50 mm2
Routing area calculated with 0.3 routing factor383.36 mm2
Total area1277.86 mm2
(1) Assuming 1 mm keep-out around each component, and multiplying by component count