SLDA060 March   2023 AM68 , AM68A , LP8733 , TPS62870 , TPS62871 , TPS62872 , TPS62873 , TPSM8287A12 , TPSM8287A15

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2PDN Selection Guide
  5. 3LP87334E PMIC Settings
  6. 4Example Power Maps
    1. 4.1 AM68x Single LP87334E PDN-6K, Base Features Only
    2. 4.2 AM68x Single LP87334E PDN-6J, Base and eFuse Programming
    3. 4.3 AM68x Single LP87334E PDN-6H, Base, eFuse and SD Card
    4. 4.4 AM68x Single LP87334E PDN-6G, Base, eFuse, SD Card, and USB2.0
  7. 5Conclusion
  8. 6References

3 LP87334E PMIC Settings

The LP87334E is an integrated power management IC (PMIC) device optimized for AM68x processors. LP87334E simplifies the design process, reduces time to market and enables direct implementation of recommended power solutions. Table 3-1 provides an overview of the basic features.

Table 3-1 LP87334E Basic Features
FeaturesLP8733x
Operational Ambient Temperature Range-40 to +125 C
Input Voltage Range2.8 V to 5.5 V
Total Number of Regulators4
DC-DC step-down convertersqty = 2,

max current = 3 A,

output voltage = 0.7 - 3.36 V,

remote voltage sense

LDOsqty = 2,

max current = 0.3 A,

output voltage = 0.8 - 3.3V

Additional Features
  • Programmable sequencer for start-up & shut down delays of power resources & GPO signals
  • 2 configurable GPO signals for controlling discrete power resources
  • I2C serial interface control
  • Interrupt function with programmable masking
  • Programmable power-good signal (PGOOD)
  • Output short-circuit and overload protection
  • Overtemperature warning and protection
  • Overvoltage protection (OVP)
  • Undervoltage lockout (UVLO)

Table 3-2 shows the regulator output voltage with both startup and shutdown sequencing delays for LP87334E. For more information on operation and specifications of this device, please see the LP8733x data sheet.

Table 3-2 LP87334E Voltage and Sequencing Table
PMICLP87334E
Regulator SettingsOutput VoltageStartup / Shutdown Delay
Buck00.85 V3 ms / 0.5 ms
Buck11.1 V3 ms / 0.5 ms
LDO00.8 V1 ms / 1 ms
LDO11.8 V0 ms / 3 ms
GPO0PP ref to VANA (1)1 ms / 1 ms
GPO2OD with Rpu(1)11 ms / 0 ms
(1) GPO and GPO2 control signals have OTP settings that select either Push-Pull (PP) buffer type referenced to PMIC's VANA input supply or Open-Drain buffer type with external pull-up resistor (Rpu) to desired voltage.