MAX1765(2000) Просмотр технического описания (PDF) - Maxim Integrated
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MAX1765
(Rev.:2000)
(Rev.:2000)
Maxim Integrated
MAX1765 Datasheet PDF : 19 Pages
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800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
EFFICIENCY vs. LOAD CURRENT
(VOUT = +3.3V)
1.0
VIN = +2.4V
0.9
0.8
0.7 NORMAL
0.6 MODE
0.5
VIN = +1.2V
PWM
MODE
0.4
VIN = +2.4V
0.3
VIN = +1.2V
0.2
0.1
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
TRACK MODE EFFICIENCY vs. LOAD CURRENT
(VOUTL = +3.3V)
90
VIN = +2.4V
80
VIN = +3.6V
70
VIN = +2.4V
60
PWM
50 NORMAL VIN = +1.2V
MODE
40
MODE
NORMAL MODE/
VIN = +1.2V PWM MODE
30
20
10
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(VOUT = +5V)
100
VIN = +3.6V NORMAL MODE
90
80
70
60 VIN = +1.2V
50
PWM
MODE
40
VIN = +1.2V
30
VIN = +2.4V
20
VIN = +3.6V
10
VIN = +2.4V
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
TRACK MODE EFFICIENCY vs. LOAD CURRENT
(VOUTL = +5V)
90
NORMAL MODE VIN = +3.6V
80
70
60
50
VIN = +1.2V
40
PWM
MODE
VIN = +2.4V
30
VIN = +1.2V
20
VIN = +2.4V
10
VIN = +3.6V
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
TRACK MODE EFFICIENCY vs. LOAD CURRENT
(VOUTL = +2.85V)
100
90
NORMAL MODE
80 VIN = +2.4V
70
60
VIN = +1.2V
50
PWM
MODE
40
30
VIN = +1.2V
20
VIN = +2.4V
10
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
1200
VOUT = +5V, ISET = REF
1000 VOUT = +3.3V, ISET = 0.5 REF
800 VOUT = +3.3V, ISET = REF
600
400
200
0
0
VOUT = +5V, ISET = 0.5 REF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
LINEAR REGULATOR DROPOUT
VOLTAGE vs. LOAD CURRENT
0.30
0.25
VOUTL = +2.5V
0.20
VOUTL = +2.85V
0.15
0.10
VOUTL = +5V
0.05
0
0 100 200 300 400 500 600 700 800
LOAD CURRENT (mA)
STARTUP INPUT VOLTAGE
vs. OUTPUT CURRENT
2.5
2.0
TA = +25°C
1.5
TA = -40°C
1.0
TA = +85°C
0.5
0
1
10
100
1000
OUTPUT CURRENT (mA)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
18
16
14
FPWM MODE
12
10
8
6
4
2
NORMAL MODE
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
INPUT VOLTAGE (V)
_______________________________________________________________________________________ 7
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