MAX1927REUB Maxim Integrated Products, MAX1927REUB Datasheet - Page 5

• Manufacturer Part Number: MAX1927REUB
• Description: DC/DC Switching Converters 800mA PWM Step-Down DC/DC Converter
• Manufacturer: Maxim Integrated Products

(Circuits of Figure 3 and 4, T
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
100
100
90
80
70
60
50
40
30
90
80
70
60
50
40
Low-Output-Voltage, 800mA, PWM Step-Down
1
0
1
OUTPUT VOLTAGE vs. LOAD CURRENT
100
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
V
IN
200 300 400 500
= 3.6V
V
IN
= 2.7V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
10
10
V
MAX1928-15
MAX1928-18
V
IN
MAX1927R
IN
= 3.6V
_______________________________________________________________________________________
= 5V
600 700
100
A
100
V
IN
= +25°C, unless otherwise noted.)
V
V
= 5V
V
OUT
OUT
IN
800
= 3.6V
= 1.5V
= 3.3V
900
1000
1000
1000
400
350
300
250
200
150
100
100
100
50
90
80
70
60
50
40
90
80
70
60
50
40
30
0
0
1
1
0.5 1.0 1.5
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
V
IN
NO-LOAD INPUT CURRENT
= 3.6V
V
IN
vs. INPUT VOLTAGE
LOAD CURRENT (mA)
= 2.7V
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
10
10
V
2.0
MAX1928-25
V
MAX1927R
IN
IN
= 3.6V
= 5V
2.5 3.0 3.5
Typical Operating Characteristics
100
100
V
IN
4.0
= 5V
V
OUT
4.5
= 1V
5.0
DC-DC Converters
1000
1000
5.5
1.06
1.04
1.02
1.00
0.98
0.96
0.94
100
500
450
400
350
300
250
200
150
100
90
80
70
60
50
40
30
50
0
2.6
1
0
DROPOUT VOLTAGE vs. LOAD CURRENT
V
0.1
EFFICIENCY vs. LOAD CURRENT
IN
T
3.1
= 2.7V
A
0.2 0.3 0.4 0.5
OSCILLATOR FREQUENCY
= +85 C
vs. INPUT VOLTAGE
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
10
LOAD CURRENT (A)
3.6
MAX1928-18
MAX1928-25
V
IN
= 5V
T
A
T
4.1
= +25 C
A
= -40 C
0.6 0.7
V
100
4.6
IN
= 3.6V
V
V
OUT
IN
0.8
= 2.5V
5.1
= 1.8V
0.9
1000
1.0
5.6
5