Datasheet

-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
400
500
600
700
800
900
1000
1100
1200
SWITCHING FREQUENCY (kHz)
500 kHz
1 MHz
20
25
30
35
40
45
50
55
60
PMOS R
DSON
(m:)
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
V
IN
= 3.3V
V
IN
= 5.0V
1.6
1.7
1.8
1.9
2.0
2.1
SOFT-START CURRENT (PA)
-50
-25 0 25 50 75 100
TEMPERATURE (°C)
125
-50
-25 0 25 50 75 100
TEMPERATURE (°C)
1.175
1.200
1.225
1.250
ENABLE THRESHOLD (V)
125
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
0.795
0.796
0.797
0.798
0.799
0.800
0.801
0.802
FB VOLTAGE (V)
2.45
2.65
UVLO THRESHOLD (V)
-50
-25 0 25 50 75 100
TEMPERATURE (°C)
125
2.50
2.55
2.60
LM2854
www.ti.com SNVS560C –MARCH 2008–REVISED APRIL 2013
Typical Performance Characteristics
Unless otherwise specified, the following conditions apply: VIN = PVIN = AVIN = EN = 5.0V, C
IN
is 47 µF 10V X5R ceramic
capacitor, L
O
is from TDK SPM6530T family; T
AMBIENT
= 25°C for efficiency curves, bode plots and waveforms, and T
J
= 25°C
for all others.
Feedback Voltage vs. Temperature UVLO Threshold vs. Temperature
Figure 2. Figure 3.
Soft Start Current vs Temperature Enable Threshold vs. Temperature
Figure 4. Figure 5.
Switching Frequency vs. Temperature PMOS R
DS(ON)
vs. Temperature
Figure 6. Figure 7.
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