Lo w -No is e , 5 .5 V-In p u t ,
P WM S t e p -Do w n Re g u la t o r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(SYNC/PWM = GND, circuit of Figure 2, L = Sumida CD43-100, T = +25°C, unless otherwise noted.)
A
DROPOUT VOLTAGE vs.
LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
(V = 3.3V)
EFFICIENCY vs. LOAD CURRENT
(V = 2.5V)
OUT
OUT
100
95
100
95
600
500
400
300
200
100
0
90
90
MAX1692
V
OUT
= 2.5V
V
= 3.6V
85
80
85
80
IN
V
IN
= 2.7V
V
IN
= 3.6V
75
70
75
70
V
IN
= 5.0V
V
= 3.3V
OUT
V
IN
= 5.0V
65
60
65
60
LIM = IN
R1 = 505kΩ
R2 = 301kΩ
LIM = IN
R1 = 309kΩ
R2 = 301kΩ
55
50
55
50
0
150
300
450
600
750
900
1
10
100
1000
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
FEEDBACK VOLTAGE
vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
(V = 1.8V)
BATTERY INPUT CURRENT vs.
INPUT VOLTAGE
OUT
100
1.25
1.245
1.24
100
V
IN
= 2.7V
V
= 5.0V
IN
95
90
95
90
85
80
75
70
65
60
R1 = 309kΩ
R2 = 301kΩ
SYNC/PWM = GND
LIM = IN
T = +85°C
A
85
80
1.235
V
= 3.6V
IN
1.23
1.225
1.22
75
70
T = +25°C
A
V
IN
= 5.0V
LIM = GND
65
60
1.215
1.21
T = -40°C
A
LIM = IN
R1 = 138kΩ
R2 = 301kΩ
V
OUT
= 1.8V
55
50
1.205
1.2
SYNC/PWM = GND
1
10
100
1000
0
100 200 300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
OUTPUT VOLTAGE vs.
LOAD CURRENT
BATTERY INPUT CURRENT vs.
INPUT VOLTAGE
BATTERY INPUT CURRENT vs. INPUT
VOLTAGE AND TEMPERATURE
1.84
1.82
1.80
1.78
1.76
1.74
5.0
2.5
2.0
1.5
1.0
V
= 2.7V
= 1.8V
IN
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
OUT
R1 = 138kΩ
R2 = 301kΩ
V
= 3.3V
T = +85°C
A
OUT
V
OUT
= 2.5V
T = +25°C
A
V
= 1.8V
OUT
T = -40°C
A
V
= 1.8V
OUT
SYNC/PWM = IN
SYNC/PWM = IN
0
100 200 300 400 500 600 700 800 900
LOAD CURRENT (mA)
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
2.7
3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
