EL7535
Typical Performance Curves
100
V
IN
=5V
95
90
EFFICIENCY (%)
85
80
75
70
65
60
0
100
200
I
O
(mA)
300
400
V
O
=1.2V
V
O
=1.8V
V
O
=2.5V
EFFICIENCY (%)
V
O
=3.3V
100
V
IN
=3.3V
95
90
85
80
75
70
65
60
0
100
200
I
O
(mA)
300
400
V
O
=1V
V
O
=1.8V
V
O
=1.2V
V
O
=2.5V
FIGURE 1. EFFICIENCY
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
FIGURE 2. EFFICIENCY
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.2
POWER DISSIPATION (W)
0.7
POWER DISSIPATION (W)
0.6
0.5
0.4
0.3
0.2
0.1
0
1 1.087W
0.8
0.6
0.4
0.2
0
θ
M
JA
=
SO
5°
607mW
θ
M
11
P8
/1
C/
0
JA
=
W
SO
P8
/1
20
0
6°
C/
W
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 3. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 4. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
Waveforms
All waveforms are taken at V
IN
=3.3V, V
O
=1.8V, I
O
=350mA with component values shown on page 1, unless otherwise noted
V
IN
(2V/DIV)
V
IN
(1V/DIV)
I
IN
(0.2A/DIV)
V
O
(2V/DIV)
POR
(2V/DIV)
V
O
(1V/DIV)
0.5ms/DIV
50ms/DIV
FIGURE 5. START-UP 1
FIGURE 6. START-UP 2
5
FN7003.2
August 16, 2005
INTERSIL [ INTERSIL CORPORATION ]
