MAX1678EUA Maxim Integrated Products, MAX1678EUA Datasheet - Page 5

• Manufacturer Part Number: MAX1678EUA
• Description: DC/DC Switching Converters
• Manufacturer: Maxim Integrated Products

Specifications of MAX1678EUA

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

(Circuit of Figure 7 (Fixed Mode, 3.3V) or Figure 8 (Adjustable Mode), T
140
120
100
90
85
80
75
70
65
60
55
50
10
80
60
40
20
12
8
6
4
2
0
0
EFFICIENCY WITH DIFFERENT INDUCTORS
0
0
COILCRAFT
3.3V FIXED MODE
L1 = 47 H
SUMIDA CD43-470
L1 = 22 H
SUMIDA CD43-220
0.5
V
SHUTDOWN BATTERY CURRENT
OUT
1
MAXIMUM LOAD CURRENT
1.0
= 2.4V
vs. INPUT VOLTAGE
vs. INPUT VOLTAGE
1.5
V
High-Efficiency, Step-Up DC-DC Converter
SUMIDA
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
OUT
2
(L1 = 22 H)
2.0
= 5.0V
_______________________________________________________________________________________
V
OUT
2.5
3
MURATA
= 3.3V
3.0
4
3.5 4.0
V
V
I
LOAD
BATT
OUT
= 3.3V
= 20mA
= 1.2V
TDK
5
4.5
5.0
6
1000
120
100
140
100
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
Typical Operating Characteristics (continued)
80
60
40
20
10
0
-40
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V
V
L1 = 47 H
SUMIDA CD43-470
L1 = 47 H
SUMIDA CD43-470
OUT
BATT
0.5
-20
NO-LOAD BATTERY CURRENT
= 2.4V
1-Cell to 2-Cell, Low-Noise,
MAXIMUM LOAD CURRENT
= 1.3V
1.0
ON-TIME CONSTANT (K)
V
R1 = 3M , R2 = 1M
(L1 = SUMIDA 47 H)
vs. INPUT VOLTAGE
vs. TEMPERATURE
vs. INPUT VOLTAGE
OUT
1.5
V
0
TEMPERATURE (°C)
OUT
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 5.0V
V
R1 = 1M , R2 = 1M
2.0
OUT
= 3.3V
20
= 2.4V
2.5
V
FB = GND
A
OUT
40
= +25°C, unless otherwise noted.)
3.0
= 3.0V
3.5 4.0
60
V
OUT
80
= 5.0V
4.5
100
5.0
120
100
140
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
80
60
40
20
45
40
35
30
25
20
15
10
0
5
0
-40
0
0
MINIMUM START-UP INPUT VOLTAGE
V
BATT AND OUT QUIESCENT CURRENT
L1 = 47 H
SUMIDA CD43-470
3.3V FIXED MODE
L1 = 47 H
TDK NLC453232T-470K
V
V
FB = GND
OUT
WITHOUT
DIODE
0.5
BATT
OUT
-20
5
= 2.4V
MAXIMUM LOAD CURRENT
= 3.6V
1.0
= 1.3V
vs. INPUT VOLTAGE
vs. LOAD CURRENT
1.5
vs. TEMPERATURE
10
LOAD CURRENT (mA)
0
(L1 = TDK 47 H)
INPUT VOLTAGE (V)
V
TEMPERATURE (°C)
OUT
2.0
15
20
= 3.3V
2.5
WITH EXTERNAL
SCHOTTKY DIODE
(FIGURE 3)
20
40
3.0
3.5 4.0
25
60
V
I
I
BATT
OUT
OUT
30
80
= 5.0V
4.5
5.0
100
35
5