Typical operating characteristics – Rainbow Electronics MAX1734 User Manual
Page 4
MAX1733/MAX1734
Low-Voltage, Step-Down DC-DC Converters
in SOT23
4
_______________________________________________________________________________________
Typical Operating Characteristics
(C
IN
= 2.2µF ceramic, C
OUT
= 22µF tantalum, L = 10µH, unless otherwise noted.)
100
1000
30
40
50
60
80
70
90
100
0.1
1
10
EFFICIENCY vs.
LOAD CURRENT (V
OUT
= 1.8V)
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 5.0V
V
IN
= 3.6V
V
IN
= 2.7V
MAX1733/4-01
100
1000
30
40
50
60
80
70
90
100
0.1
1
10
EFFICIENCY vs.
LOAD CURRENT (V
OUT
= 1.5V)
MAX1733/4-02
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 5.0V
V
IN
= 3.6V
V
IN
= 2.7V
46
48
50
52
54
56
58
60
62
2.5
3.5
3.0
4.0
4.5
5.0
5.5
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1733/4-03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
V
OUT
= 1.5V, T
A
= -40°C
V
OUT
= 1.5V, T
A
= +25°C
V
OUT
= 1.8V, T
A
= +85°C
V
OUT
= 1.8V, T
A
= +25°C
3.0
-3.0
0.1
10
100
1
1000
OUTPUT ACCURACY vs.
LOAD CURRENT (V
OUT
= 1.8V)
MAX1733/4-04
LOAD CURRENT (mA)
OUTPUT ACCURACY (%)
-2.0
-1.0
0
1.0
2.0
V
IN
= 3.6V, T
A
= -40°C
V
IN
= 5.0V, T
A
= +25°C
V
IN
= 3.6V, T
A
= +85°C
V
IN
= 2.7V, T
A
= +25°C
3.0
-3.0
0.1
10
100
1
1000
OUTPUT ACCURACY vs.
LOAD CURRENT (V
OUT
= 1.5V)
MAX1733/4-05
LOAD CURRENT (mA)
OUTPUT ACCURACY (%)
-2.0
-1.0
0
1.0
2.0
V
IN
= 3.6V, T
A
= -40°C
V
IN
= 2.7V, T
A
= +25°C
V
IN
= 3.6V, T
A
= +85°C
V
IN
= 5.0V, T
A
= +25°C
1.50
1.25
1.00
0.75
0.50
2.7
3.3
3.0
3.6
3.9
4.2
SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
MAX1733/4-06
SUPPLY VOLTAGE (V)
SWITCHING FREQUENCY (MHz)
V
OUT
= 1.8V
V
OUT
= 1.5V
I
LOAD
= 50mA TO 250mA
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1733/4-07
400ns/div
V
LX
2V/div
V
OUT
AC-COUPLED
20mV/div
V
IN
= 3.6V, V
OUT
= 1.8V, I
LOAD
= 20mA
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1733/4-08
400ns/div
V
LX
2V/div
V
OUT
AC-COUPLED
20mV/div
V
IN
= 3.6V, V
OUT
= 1.8V, I
LOAD
= 200mA