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MAX1674 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part No. MAX1674
Description  High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters
Download  12 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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 5 page
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High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
_______________________________________________________________________________________
5
0
40
20
100
80
60
140
120
160
0
1.5 2.0
0.5 1.0
2.5 3.0 3.5 4.0 4.5
NO-LOAD BATTERY CURRENT
vs. INPUT BATTERY VOLTAGE
INPUT BATTERY VOLTAGE (V)
ILIMIT = 1A, 5.0V
ILIMIT = 0.5A, 5.0V
ILIMIT = 0.5A, 3.3V
ILIMIT = 1A, 3.3V
1.8
0
0.01
1
10
0.1
100
START-UP VOLTAGE
vs. LOAD CURRENT
0.2
0.4
LOAD CURRENT (mA)
0.8
0.6
1.0
1.2
1.4
1.6
WITHOUT DIODE
WITH 1N5817
-1.0
-0.6
-0.8
-0.2
-0.4
0.2
0
0.4
0.8
0.6
1.0
1
2.0 2.5 3.0
1.5
3.5 4.0 4.5 5.0 5.5
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
0
0.4
0.2
0.8
0.6
1.2
1.0
1.4
0
1.0 1.5
0.5
2.0 2.5 3.0 3.5 4.0 4.5 5.0
SHUTDOWN THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
0
200
100
500
300
400
800
700
600
900
1.0
2.0
1.5
2.5
3.0
3.5
4.0
4.5
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 5V)
INPUT VOLTAGE (V)
1A CURRENT LIMIT
0.5A CURRENT LIMIT
0
200
100
400
300
600
500
800
700
1.0
1.4 1.6
1.2
1.8 2.0 2.2 2.4 2.6 2.8 3.0
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 3.3V)
INPUT VOLTAGE (V)
0.5A CURRENT LIMIT
1A CURRENT LIMIT
Typical Operating Characteristics (continued)
(L = 22µH, CIN = 47µF, COUT = 47µF
 0.1µF, CREF = 0.1µF, TA = +25°C, unless otherwise noted.)
1
µs/div
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1674 TOC13
VLX
5V/div
ILX
0.5A/div
VOUT
AC COUPLED
100mV/div
VIN = 2.4V
VOUT = 5.0V
0
0.4
0.2
0.8
0.6
1.0
1.2
2.0
3.0
3.5
2.5
4.0
4.5
5.0
LX CURRENT LIMIT
vs. OUTPUT VOLTAGE
OUTPUT VOLTAGE (V)
MAX1674, MAX1676 (CLSEL = OUT)
MAX1675, MAX1676 (CLSEL = GND)
0
0.15
0.10
0.05
0.25
0.20
0.35
0.30
0.45
0.40
-60
-20
-40
0
20
40
60
80
100
SWITCH RESISTANCE vs. TEMPERATURE
TEMPERATURE (°C)
P-CHANNEL
N-CHANNEL




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