Typical operating characteristics – Rainbow Electronics MAX1524 User Manual
Page 3
MAX1522/MAX1523/MAX1524
Simple SOT23 Boost Controllers
_______________________________________________________________________________________
3
100
50
0.1
1
100
1000
EFFICIENCY vs. LOAD CURRENT
(DESIGN EXAMPLE 1)
70
80
90
MAX1522/3/4 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
10
60
V
OUT
= +5V
V
IN
= 3.3V
100
50
0.1
1
100
1000
EFFICIENCY vs. LOAD CURRENT
(DESIGN EXAMPLE 2)
70
80
90
MAX1522/3/4 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
10
60
V
IN
= +4.2V
V
IN
= +3.6V
V
IN
= +2.7V
V
OUT
= +12V
100
50
0.1
1
100
1000
EFFICIENCY vs. LOAD CURRENT
(DESIGN EXAMPLE 3)
70
80
90
MAX1522/3/4 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
10
60
V
IN
= +2.4V
V
IN
= +1.8V
V
IN
= +3V
MAX1524
V
OUT
= +5V
100
50
0.1
1
100
EFFICIENCY vs. LOAD CURRENT
(DESIGN EXAMPLE 4)
70
80
90
MAX1522/3/4 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
10
60
V
IN
= +4.2V
V
IN
= +2.7V
V
IN
= +3.6V
V
OUT
= +24V
100
50
0.1
1
100
EFFICIENCY vs. LOAD CURRENT
(DESIGN EXAMPLE 5)
70
80
90
MAX1522/3/4 toc05
LOAD CURRENT (mA)
EFFICIENCY (%)
10
60
V
IN
= +3.0V
V
IN
= +2.4V
V
IN
= +1.8V
MAX1524
V
OUT
= +3.3V
1.75
1.50
1.25
1.00
0.75
0
50
25
75
100
STARTUP INPUT VOLTAGE
vs. OUTPUT CURRENT
MAX1522/3/4 toc06
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
V
OUT
= +3.3V
BOOTSTRAPPED
RESISTIVE LOADS
10
0.0001
0
1
3
4
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
0.01
0.1
1
MAX1522/3/4 toc07
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
2
0.001
NONBOOTSTRAPPED
BOOTSTRAPPED
5
400ns/div
SWITCHING WAVEFORM
(CONTINUOUS CONDUCTION)
V
IN
= +3.3V, V
OUT
= +5V, I
OUT
= 350mA
A : V
OUT
, 200mV/div, AC-COUPLED
B : V
LX
, 5V/div
C : I
L
, 0.5A/div
A
C
B
MAX1522/3/4 toc08
4
µ
s/div
SWITCHING WAVEFORM
(DISCONTINUOUS CONDUCTION)
V
IN
= +3.3V, V
OUT
= +24V, I
OUT
= 10mA
A : V
OUT
, 200mV/div, AC-COUPLED
B : V
LX
, 10V/div
C : I
L
, 0.5A/div
A
C
B
MAX1522/3/4 toc09
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)