FAN53541 Datasheet, PDF (8/15 Pages) Fairchild Semiconductor – 2.4 MHz, 5 A TinyBuck Synchronous Buck Regulator

Typical Characteristics
Unless otherwise specified; V_IN=5 V, V_OUT=1.2 V, V_MODE=0 V, T_A=25°C, circuit in Figure 1, and components per Table 1.
60
50
50
40
40
30
30
20
20
10
2.5
3.0
3.5
4.0
4.5
Input Voltage (V)
-40C
+25C
+85C
5.0
5.5
Figure 16. Quiescent Current, Auto Mode, EN=V_IN
70
1.2VOUT,
25mA Load
60
1.2VOUT,
1.0A Load
3.3VOUT,
1.0A Load
50
40
30
20
10
10
100
1,000
10,000
Frequency (Hz)
100,000
Figure 18. Power Supply Rejection (PSRR)
10
0
2.5
3.0
3.5
4.0
4.5
Input Voltage (V)
-40C
+25C
+85C
5.0
5.5
Figure 17. Quiescent Current, PMW Mode, EN=V_IN
100%
95%
90%
85%
80%
75%
70%
0
1.2 VOUT, L=SC2511
1.2 VOUT, L=IHLP16
1.8 VOUT, L=SC2511
1.8 VOUT, L=IHLP16
3.3 VOUT, L=SC2511
3.3 VOUT, L=IHLP16
1000
2000
3000
Load Current (mA)
4000
5000
Figure 19. Inductor Efficiency Comparison, 5.0 V_IN
Figure 20. Line Transient, 50  Load, t_R=t_F=10 s
Figure 21. Line Transient, I_LOAD=1.0 A, t_R=t_F=10 s
© 2013 Fairchild Semiconductor Corporation
FAN53541 • Rev. 1.0.2
8
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