MAX668EUB+T Maxim Integrated Products, MAX668EUB+T Datasheet - Page 5

• Manufacturer Part Number: MAX668EUB+T
• Description: IC PWM BST FLYBCK ISO CM 10UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX668EUB+T

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 575kHz
• Duty Cycle: 94%
• Voltage - Supply: 3 V ~ 28 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Frequency-max: 575kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(Circuits of Figures 2, 3, 4, and 5; T
3.0
2.5
2.0
1.5
1.0
0.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
95
90
85
80
75
70
65
60
55
50
0
0
1
0
0
MAX669 MINIMUM START-UP VOLTAGE
MAX669
V
V
BOOTSTRAPPED
FIGURE 2
100 200
BOOTSTRAPPED
FIGURE 3
R4 = 200k
OUT
IN
EFFICIENCY vs. LOAD CURRENT
= 3.3V
5
= 5V
SHUTDOWN CURRENT vs.
10
V
vs. LOAD CURRENT
300
SUPPLY VOLTAGE
IN
LOAD CURRENT (mA)
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
V
10
IN
= 2V
(V
MAX668
400
= 3.6V
V
OUT
_______________________________________________________________________________________
IN
CURRENT INTO V
100
= 2.7V
500 600 700 800 900 1000
15
= 5V)
V
OUT
20
1000
= 12V
CC
25
PIN
A
= +25°C; unless otherwise noted.)
10,000
30
1.8V to 28V Input, PWM Step-Up
1200
1000
290
150
800
600
400
200
270
250
230
210
190
170
95
90
85
80
75
70
0
-40
1
0
-20
V
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200k
LOAD CURRENT (V
IN
5
MAX668 EFFICIENCY vs.
= 5V
MAX669
SUPPLY CURRENT vs.
SUPPLY CURRENT vs.
10
MAX668
SUPPLY VOLTAGE
0
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
TEMPERATURE ( C)
TEMPERATURE
10
CURRENT INTO V
R
20
OSC
100
15
Typical Operating Characteristics
= 500k
40
OUT
20
R
R
R
OSC
OSC
OSC
60
1000
= 12V)
CC
Controllers in µMAX
= 100k
= 200k
= 500k
25
PIN
80
10,000
100
30
300
250
200
150
100
4000
3500
3000
2500
2000
1500
1000
50
90
95
85
70
80
75
500
0
0
0.1
1
0
NO-LOAD SUPPLY CURRENT vs.
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200k
LOAD CURRENT (V
LDO DROPOUT VOLTAGE vs.
2
V
MAX668 EFFICIENCY vs.
IN
10
= 12V
SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
LDO CURRENT (mA)
LDO CURRENT
4
V
IN
V
1
= 3V
IN
100
= 5V
6
V
V
BOOTSTRAPPED
FIGURE 2
R4 = 200k
OUT
IN
OUT
8
= 4.5V
1000
= 24V)
= 12V
V
IN
10
= 8V
10
10,000
20
12
5