MAX669 MAXIM [Maxim Integrated Products], MAX669 Datasheet - Page 4

• Manufacturer Part Number: MAX669
• Description: 1.8V to 28V Input, PWM Step-Up Controllers in ?MAX
• Manufacturer: MAXIM [Maxim Integrated Products]

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
CC
= -40°C are guaranteed by design.
OSC
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
3.0V < V
1.8V < V
3.0V < 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
REF
< 28V
< 3.0V (MAX669)
< 28V
< 3.0V (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