ZHCSN51J june 2007 – april 2023 TPS74901
PRODUCTION DATA
First choose the bias, which must be at least 1.75
V above the output voltage. A 3.3-V rail is used to achieve this minimum voltage.
For a minimal external component count and size, select the minimum capacitor
sizes.
CIN = 1 µF, CBIAS = 1
µF, and a COUT = 10 µF. The COUT value was chosen to improve
transient response. Using Table 8-2, R1 is set to 2.49 kΩ and R2 is set to 4.99 kΩ to create a
1.2-V rail. The pullup resistor for PG is set to 10 kΩ.