參數(shù)資料
型號： MAX669EUB+T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.8V to 28V Input, PWM Step-Up Controllers in µMAX
中文描述： SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, PDSO10
封裝： COMPACT, UMAX-10
文件頁數(shù)： 13/18頁
文件大小： 289K
代理商： MAX669EUB+T
MAX668/MAX669
1.8V to 28V Input, PWM Step-Up
Controllers in MAX
4
_______________________________________________________________________________________
ns
%
Minimum SYNC Input-Pulse Duty Cycle
45
Minimum SYNC Input Low Pulse Width
200
SYNC Input Rise/Fall Time
Not tested
200
ns
ELECTRICAL CHARACTERISTICS (continued)
(VCC = LDO = 5V, ROSC = 200k, TA = -40°C to +85°C, unless otherwise noted.)
ROSC = 200k ±1%
87
93
SYNC Input Frequency Range
100
500
kHz
1.8V < VCC < 3V (MAX669)
0.30
V
1.8V < VCC < 3V (MAX669)
1.5
V
SYNC/SHDN = 28V
6.5
A
EXT On-Resistance
EXT high or low
5
SYNC/SHDN Input Current
SYNC/SHDN = 5V
3.0
Note 1: This is the VCC current consumed when active but not switching. Does not include gate-drive current.
Note 2: Limits at TA = -40°C are guaranteed by design.
222
278
UNITS
PARAMETER
CONDITIONS
MIN
MAX
ROSC = 200k ±1%
%
Maximum Duty Cycle
ROSC = 500k ±1%
86
94
425
575
ROSC =100k ±1%
kHz
Oscillator Frequency
85
115
ROSC = 500k ±1%
ROSC = 100k ±1%
86
94
SYNC/SHDN Input High Voltage
3V < VCC < 28V
2.0
SYNC/SHDN Input Low Voltage
3V < VCC < 28V
0.45
V
REF Output Voltage
No load, CREF = 0.22F
1.22
1.28
mV
REF Load Regulation
REF load = 0 to 50A
-10
V
REF Undervoltage Lockout Threshold
Rising edge, 1% hysteresis
1.0
1.2
OSCILLATOR
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