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MAX1705 Fiches technique(PDF) 6 Page - Maxim Integrated Products

No de pièce MAX1705
Description  1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator
Download  20 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1705 Fiches technique(HTML) 6 Page - Maxim Integrated Products

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1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
6
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)
100
0
0.1
10
100
1
1000
MAX1705
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 5V)
20
OUTPUT CURRENT (mA)
40
60
80
90
10
30
50
70
L = 10
µH
VOUT = 5V
A: VIN = 0.9V
C: VIN = 2.4V
E: VIN = 3.6V
1: PFM MODE
2: PWM MODE
A.1
A.2
C.1
C.2
B.2
B.1
100
0
0.1
10
100
1
1000
MAX1705
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 3.3V)
20
OUTPUT CURRENT (mA)
40
60
80
90
10
30
50
70
L = 10
µH
VOUT = 3.3V
A: VIN = 0.9V
B: VIN = 2.7V
1: PFM MODE
2: PWM MODE
B.1
B.2
A.1
A.2
0
0
MAX1705
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
200
100
300
INPUT VOLTAGE (V)
3.5
700
600
900
800
400
500
1.0
2.5
4.5
1000
2.0
3.0
0.5
4.0
1.5
L = 10
µH
PWM MODE
PFM MODE
VOUT = 3.3V
VOUT = 3.3V
VOUT = 5V
VOUT = 5V
100
0
0.1
10
100
1
1000
MAX1706
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 3.3V)
20
OUTPUT CURRENT (mA)
40
60
80
90
10
30
50
70
B.2
A.2
A.1
B.1
L = 22
µH
VOUT = 3.3V
A: VIN = 0.9V
B: VIN = 2.7V
1: PFM MODE
2: PWM MODE
0.5
0.01
MAX1705
START-UP INPUT VOLTAGE
vs. OUTPUT CURRENT
0.9
0.7
1.1
OUTPUT CURRENT (mA)
100
1.7
1.5
2.1
1.9
1.3
0.1
10
1000
2.3
1
NO-LOAD START-UP:
1.0V AT -40°C
0.79 AT +25°C
0.64V AT +85°C
CONSTANT-CURRENT LOAD
VOUT = 3.3V
L = 10
µH
D1 = MBR0520L
TA = -40°C
TA = +25°C
TA = +85°C
100
0
0.1
10
100
1
1000
MAX1706
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 5V)
20
OUTPUT CURRENT (mA)
40
60
80
90
10
30
50
70
A.1
A.2
C.2
B.2
C.1
B.1
L = 22
µH
VOUT = 5V
A: VIN = 0.9V
B: VIN = 2.4V
C: VIN = 3.6V
1: PFM MODE
2: PWM MODE
0
0
MAX1706
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
200
100
300
INPUT VOLTAGE (V)
3.5
700
600
400
500
1.0
3
4.5
2.0
0.5
2.5
4
1.5
PWM MODE
L = 22
µH
PFM MODE
VOUT = 5V
VOUT = 5V
VOUT = 3.3V
VOUT = 3.3V
0
0
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
2
1
3
INPUT VOLTAGE (V)
4.0
7
6
10
9
8
4
5
1.0
3.0
5.0
12
11
2.0
3.5
0.5
2.5
4.5
1.5
PFM MODE
PWM MODE
VOUT = 3.3V
L = 10
µH
0
0
LINEAR-REGULATOR DROPOUT
VOLTAGE vs. LOAD CURRENT
20
40
LOAD CURRENT (mA)
160
120
100
60
80
40
120
200
140
80
VLDO = 3.3V
VLDO = 2.5V
VLDO = 5V


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