EL7551CU ELANTEC [Elantec Semiconductor], EL7551CU Datasheet - Page 4

• Manufacturer Part Number: EL7551CU
• Description: Monolithic 1 Amp DC:DC Step-down Regulator
• Manufacturer: ELANTEC [Elantec Semiconductor]

EL7551C - Preliminary
Monolithic 1 Amp DC:DC Step-down Regulator
Typical Performance Curves
-0.1
-0.2
-0.3
-0.4
100
100
0.6
0.5
0.4
0.3
0.2
0.1
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
0
0.1
4.5
0
Efficiency vs I
V
Efficiency vs I
V
Line Regulation
V
IN
O
O
=3.3V
=3.3V
=5V
V
V
IN
O
=4.5V
=2.5V
V
IN
0.2
0.2
4.7
=5.5V
I
O
V
O
O
=0.1A
O
V
=3.3V
IN
=5V
I
O
Load Current I
Load Current I
=1A
0.4
0.4
4.9
V
IN
V
V
O
O
(V)
=1.8V
=1.2V
F
L=Coilcraft DO3316P-472
F
L=Coilcraft DO3316P-472
0.6
0.6
5.1
O
O
S
S
=500kHz
=500kHz
(A)
(A)
V
O
=1V
V
0.8
0.8
5.3
O
=1.5V
5.5
1
1
4
1.258
1.256
1.254
1.252
1.248
1.246
1.244
1.242
0.25
0.15
0.05
1.25
-0.2
-0.4
-0.6
0.2
0.1
0.6
0.4
0.2
0
0
-40
0
0
Power Loss vs I
V
Load Regulation
V
V
IN
O
REF
=3.3V
=5V
vs Temperature
0.2
0.2
V
O
10
=1V
V
IN
O
=5.5V
Output Current I
V
Load Current I
IN
Temperature (°C)
0.4
0.4
=5V
V
O
=3.3V
V
IN
60
=4.5V
0.6
0.6
O
O
(A)
(A)
110
0.8
0.8
160
1
1