MAX668EUB+T Maxim Integrated Products, MAX668EUB+T Datasheet - Page 4

• 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

1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
ELECTRICAL CHARACTERISTICS (continued)
(V
4
Note 1: This is the V
Note 2: Limits at T
REF Output Voltage
REF Load Regulation
REF Undervoltage Lockout Threshold
OSCILLATOR
Oscillator Frequency
Maximum Duty Cycle
Minimum SYNC Input-Pulse Duty Cycle
Minimum SYNC Input Low Pulse Width
SYNC Input Rise/Fall Time
SYNC Input Frequency Range
SYNC/SHDN Input High Voltage
SYNC/SHDN Input Low Voltage
SYNC/SHDN Input Current
EXT On-Resistance
CC
_______________________________________________________________________________________
= LDO = 5V, R
PARAMETER
A
OSC
CC
= -40°C are guaranteed by design.
current consumed when active but not switching. Does not include gate-drive current.
= 200kΩ, T
A
= -40°C to +85°C, unless otherwise noted.)
No load, C
REF load = 0 to 50µA
Rising edge, 1% hysteresis
R
R
R
R
R
R
Not tested
3V < V
1.8V < V
3V < V
1.8V < V
SYNC/SHDN = 5V
SYNC/SHDN = 28V
EXT high or low
OSC
OSC
OSC
OSC
OSC
OSC
= 200kΩ ±1%
= 200kΩ ±1%
=100kΩ ±1%
= 500kΩ ±1%
= 100kΩ ±1%
= 500kΩ ±1%
CC
CC
CC
CC
< 28V
< 28V
REF
< 3V (MAX669)
< 3V (MAX669)
CONDITIONS
= 0.22µF
1.22
MIN
222
425
100
1.0
2.0
1.5
85
87
86
86
MAX
1.28
0.45
0.30
278
575
115
200
200
500
-10
1.2
3.0
6.5
93
94
94
45
5
UNITS
kHz
kHz
mV
µA
ns
ns
%
%
Ω
V
V
V
V