MAX668EUB Maxim Integrated Products, MAX668EUB Datasheet - Page 17

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

Specifications of MAX668EUB

• 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
• Duty Cycle (max): 94 %
• Output Voltage: 28 V
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 100 KHz to 500 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: Yes
• Topology: Boost, Flyback
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1513668

Figure 7. Isolated 5V to 5V at 400mA Power Supply
T1: COILTRONICS CTX03-14232
V
IN
= +5V
220 F
10V
______________________________________________________________________________________
1 F
0.22 F
SHDN
FB
REF
0.068 F
1.8V to 28V Input, PWM Step-Up
MAX668
FREQ
LDO
100k
10k
GND
V
CC
PGND
EXT
CS+
610
1:2
T1
MOC211
IRF7603
0.1
TLV431
510
MBR0540L
Controllers in µMAX
0.1 F
MBR0540L
47 H
R3
100k
1%
R2
301k
1%
220 F
10V
5V @ 400mA
5V RETURN
17