MAX1692 Datasheet, PDF (4/12 Pages) Maxim Integrated Products – Low-Noise, 5.5V-Input, PWM Step-Down Regulator

Low-Noise, 5.5V-Input,
PWM Step-Down Regulator
Typical Operating Characteristics
(SYNC/PWM = GND, circuit of Figure 2, L = Sumida CD43-100, T_A = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs.
LOAD CURRENT
600
500
V_OUT = 2.5V
400
300
V_OUT = 3.3V
200
100
0
0 150 300 450 600 750 900
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(V_OUT = 1.8V)
100
95
V_IN = 2.7V
90
85
80
V_IN = 3.6V
75
V_IN = 5.0V
70
65
60
55
50
1
LIM = IN
R1 = 138kΩ
R2 = 301kΩ
10
100
1000
LOAD CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.7
BATTERY INPUT CURRENT vs.
INPUT VOLTAGE
V_OUT = 2.5V
V_OUT = 3.3V
V_OUT = 1.8V
SYNC/PWM = IN
3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
100
95
90
85
80
75
70
65
60
55
50
1
EFFICIENCY vs. LOAD CURRENT
(V_OUT = 3.3V)
V_IN = 3.6V
V_IN = 5.0V
LIM = IN
R1 = 505kΩ
R2 = 301kΩ
10
100
1000
LOAD CURRENT (mA)
FEEDBACK VOLTAGE
vs. LOAD CURRENT
1.25
1.245
1.24
1.235
V_IN = 5.0V
R1 = 309kΩ
R2 = 301kΩ
SYNC/PWM = GND
1.23
1.225
LIM = IN
1.22
1.215
LIM = GND
1.21
1.205
1.2
0 100 200 300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
BATTERY INPUT CURRENT vs. INPUT
VOLTAGE AND TEMPERATURE
2.5
T_A = +85°C
2.0
100
95
90
85
80
75
70
65
60
55
50
1
EFFICIENCY vs. LOAD CURRENT
(V_OUT = 2.5V)
V_IN = 2.7V
V_IN = 3.6V
V_IN = 5.0V
LIM = IN
R1 = 309kΩ
R2 = 301kΩ
10
100
1000
LOAD CURRENT (mA)
BATTERY INPUT CURRENT vs.
INPUT VOLTAGE
100
95
T_A = +85°C
90
85
80
T_A = +25°C
75
70
T_A = -40°C
65
V_OUT = 1.8V
SYNC/PWM = GND
60
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
OUTPUT VOLTAGE vs.
LOAD CURRENT
1.84
V_IN = 2.7V
V_OUT = 1.8V
1.82
R1 = 138kΩ
R2 = 301kΩ
1.80
T_A = +25°C
1.5
T_A = -40°C
V_OUT = 1.8V
SYNC/PWM = IN
1.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
1.78
1.76
1.74
0 100 200 300 400 500 600 700 800 900
LOAD CURRENT (mA)
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