My customer would like to apply TPS57060-Q1 for Primary DCDC.
There are two input rails, Battery and IG, both rails have range from 10V to 32V as operating range, and 50V max.
IG rail is used to enable TPS57060-Q1, but the device doesn't have enough range as VIN port, divider circuitry would be required.
I attach the calculation as attached, could you check and suggest better solution?
- IG input range : 10V to 32V as operation voltage, 50V for tolerance
- Assume if VEN >= 5.8V, internal zener sink 100uA through 10kohm built in resistance as shown in Figure 27.
- If VEN < 5.8V, VEN is defined by IG ,R1, and R2.
- VEN is set as 1.5V (with margin) when IG is 10V