MAX1674-MAX1676 Maxim, MAX1674-MAX1676 Datasheet - Page 5

• Manufacturer Part Number: MAX1674-MAX1676
• Description: High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC Converters
• Manufacturer: Maxim

(L = 22µH, C
160
140
120
100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
80
60
40
20
0
0
HEAVY-LOAD SWITCHING WAVEFORMS
V
V
0
0
IN
OUT
I
LIMIT
= 2.4V
0.5
0.5 1.0
= 5.0V
NO-LOAD BATTERY CURRENT
vs. INPUT BATTERY VOLTAGE
= 0.5A, 3.3V
1.0 1.5
IN
SHUTDOWN THRESHOLD
INPUT BATTERY VOLTAGE (V)
I
LIMIT
vs. SUPPLY VOLTAGE
= 47µF, C
SUPPLY VOLTAGE (V)
1.5 2.0
= 1A, 3.3V
I
1 s/div
LIMIT
2.0 2.5 3.0 3.5 4.0 4.5 5.0
_______________________________________________________________________________________
= 1A, 5.0V
I
2.5 3.0 3.5 4.0 4.5
LIMIT
OUT
= 0.5A, 5.0V
= 47µF 0.1µF, C
MAX1674 TOC13
Compact, Step-Up DC-DC Converters
High-Efficiency, Low-Supply-Current,
V
5V/div
I
0.5A/div
V
AC COUPLED
100mV/div
LX
LX
OUT
REF
Typical Operating Characteristics (continued)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
900
800
700
600
500
400
300
200
100
0
= 0.1µF, T
0
0
0.01
1.0
-60
SWITCH RESISTANCE vs. TEMPERATURE
WITH 1N5817
WITHOUT DIODE
vs. INPUT VOLTAGE (V
-40
1.5
MAXIMUM OUTPUT CURRENT
A
0.1
-20
START-UP VOLTAGE
vs. LOAD CURRENT
2.0
= +25°C, unless otherwise noted.)
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
1A CURRENT LIMIT
0
P-CHANNEL
2.5
20
N-CHANNEL
1
0.5A CURRENT LIMIT
3.0
40
OUT
3.5
10
60
= 5V)
4.0
80
100
100
4.5
-0.2
-0.4
-0.6
-0.8
-1.0
800
700
600
500
400
300
200
100
1.2
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
2.0
1.0
1
vs. INPUT VOLTAGE (V
1.2
1.5
MAXIMUM OUTPUT CURRENT
2.5
1.4 1.6
2.0 2.5 3.0
vs. OUTPUT VOLTAGE
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX1674, MAX1676 (CLSEL = OUT)
MAX1675, MAX1676 (CLSEL = GND)
1A CURRENT LIMIT
LX CURRENT LIMIT
OUTPUT VOLTAGE (V)
SUPPLY VOLTAGE (V)
3.0
INPUT VOLTAGE (V)
1.8 2.0 2.2 2.4 2.6 2.8 3.0
3.5
0.5A CURRENT LIMIT
3.5 4.0 4.5 5.0 5.5
4.0
OUT
= 3.3V)
4.5
5.0
5