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
Switching Frequency vs C
OSC
360
350
340
1000
900
800
700
600
500
400
300
200
100
I =4A
O
330
320
310
300
290
280
I =0A
O
-40
-20
0
20
40
60
80
100 200 300 400 500 600 700 800 900 1000
Temperature (°C)
C
OSC
(pF)
VTJ vs Junction Temperature
*q vs Copper Area
JA
(20-Pin SO Package)
1.5
1.3
1.1
0.9
50
46
42
38
34
30
with no airflow
with 100 LFPM airflow
Test Condition:
Chip in the center of copper area
1 oz. copper PCB used
0
25
50
75
100
125
150
1
1.5
2
2.5
3
3.5
4
2
Junction Temperature (°C)
PCB Copper Heat-Sinking Area (in )
Switching Waveforms
=5V, V =3.3V, I =4A
Current Limit vs T
J
V
IN
O
O
8
7
6
5
4
3
DV
IN
V
LX
V =5.5V
IN
V =5V
IN
i
L
V =4.5V
IN
DV
O
-40
-20
0
20
40
T (°C)
60
80
100
120
J
6
ELANTEC [ ELANTEC SEMICONDUCTOR ]
