EL7564C
EL7564C
Monolithic 4 Amp DC:DC Step-down Regulator
Typical Performance Curves
*Note: The 28-Pin HTSSOP Package Offers Improved Performance
Oscillator Frequency vs Temperature
360
350
Oscillator Frequency (KHz)
340
330
320
310
300
290
280
-40
-20
0
20
Temperature (°C)
VTJ vs Junction Temperature
1.5
50
46
42
38
40
60
80
I
O
=0A
F
S
(KHz)
I
O
=4A
1000
900
800
700
600
500
400
300
200
Switching Frequency vs C
OSC
100
100
200
300
400
500
600
700
800
900 1000
C
OSC
(pF)
*θ
JA
vs Copper Area
(20-Pin SO Package)
1.3
VTJ
1.1
Thermal Resistance (°C/W)
with no airflow
with 100 LFPM airflow
34
30
Test Condition:
Chip in the center of copper area
1
1.5
2
2.5
0.9
1 oz. copper PCB used
3
(in
2
)
3.5
4
0
25
50
75
100
125
150
Junction Temperature (°C)
Current Limit vs T
J
8
∆V
IN
7
6
5
4
3
-40
V
IN
=5.5V
V
IN
=4.5V
∆V
O
V
IN
=5V
V
LX
i
L
PCB Copper Heat-Sinking Area
Switching Waveforms
V
IN
=5V, V
O
=3.3V, I
O
=4A
I
LMT
(A)
-20
0
20
40
T
J
(°C)
60
80
100
120
6
ELANTEC [ ELANTEC SEMICONDUCTOR ]
