AP7173_09 Datasheet, PDF (2/16 Pages) Diodes Incorporated – 1.5A LOW DROPOUT LINEAR REGULATOR WITH

AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
Typical Application Circuit (Continued)
Table 1. Resistor Values for Programming the Output Voltage (Note 3)
R₁ (kΩ)
Short
0.619
1.13
1.37
1.87
2.49
4.12
3.57
3.57
3.57
R₂ (kΩ)
Open
4.99
4.53
4.42
4.99
4.99
4.75
2.87
1.69
1.15
V_OUT (V)
0.8
0.9
1
1.05
1.1
1.2
1.5
1.8
2.5
3.3
(Note: 3) VOUT = 0.8 x (1 + R1 / R2)
Table 2. Capacitor Values for Programming the Soft-Start Time (Note 4)
CSS
Open
270pF
560pF
2.7nF
5.6nF
0.01µF
SOFT-START TIME
0.1ms
0.5ms
1ms
5ms
10ms
18ms
Notes: 4. tSS(s) = 0.8 x CSS(F) / (4.4 x 10^–7)
AP7173 Rev. 7
DS31369
Figure 2. Turn-On Response
2 of 16
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OCTOBER 2009
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