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Table 2. Sample Resistor Values for Common Output Voltages for
TPS74001DGK (continued)
R
1
[kΩ] R
2
[kΩ] VOUT [V]
1.07 4.99 1.1
1.58 4.75 1.2
1.91 2.87 1.5
2.43 2.43 1.8
3.01 1.69 2.5
4.22 1.58 3.3
5.23 1.74 3.6
TPS74012DGKEVM is a fixed output voltage IC and cannot be modified. The output voltage is fixed at 1.2
V.
4.2 Transient Response
The TPS740xx is designed to have excellent transient response for most applications with a small amount
of output capacitance. The TPS740xx is stable with a ceramic output capacitor as low as 2.2 µF.
Additional output capacitance serve to reduce undershoot and overshoot at the output during a transient
event.
Figure 3 is an example load transient response captured with V
IN
= 3.5 V, V
BIAS
= 5 V, Load = 1.2 A.
Figure 3. Transient Response of TPS74001DGKEVM With V
IN
= 3.5 V, V
BIAS
= 5 V, Load = 1.2 A
5
SLVU475A–June 2011–Revised June 2011 TPS740xxDGKEVM-722 Evaluation Module
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