LM3475_14 Datasheet, PDF (5/21 Pages) Texas Instruments – Hysteretic PFET Buck Controller

LM3475
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SNVS239A – OCTOBER 2004 – REVISED JANUARY 2005
Typical Performance Characteristics
Unless specified otherwise, all curves taken at V_IN = 5V, V_OUT = 2.5V, L = 10 µH, C_OUT = 100 µF, ESR = 100mΩ, and T_A =
25°C.
Quiescent Current
vs
Input Voltage
Feedback Voltage
vs
Temperature
Figure 2.
Hysteresis Voltage
vs
Input Voltage
Figure 3.
Hysteresis Voltage
vs
Temperature
Figure 4.
Efficiency
vs
Load Current
98
96
94
92
90
88
86
84
0.5
1
1.5
2
OUTPUT CURRENT (A)
Figure 6.
Figure 5.
Efficiency
vs
Input Voltage
I_OUT = 2A
100
80
60
40
20
0
4
5
6
7
8
9 10
INPUT VOLTAGE (V_IN)
Figure 7.
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