參數(shù)資料
型號(hào): MAX1856
廠商: Maxim Integrated Products, Inc.
元件分類(lèi): 數(shù)字信號(hào)處理
英文描述: Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA
中文描述: 寬輸入范圍、可同步的、PWM SLIC電源
文件頁(yè)數(shù): 3/18頁(yè)
文件大?。?/td> 594K
代理商: MAX1856
M
Wide Input Range, Synchronizable,
PWM SLIC Power Supply
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= SYNC/
SHDN,
V
CC
= 5V, V
LDO
= 5V, R
OSC
= 200k
,
T
A
= 0
°
C to +85
°
C
. Typical values are at T
A
= +25
°
C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
290
MAX
UNITS
ns
Minimum EXT Pulse Width
Minimum SYNC Input Signal
Duty Cycle
20
45
%
Minimum SYNC Input
Low Pulse Width
50
200
ns
Maximum SYNC Input
Rise/Fall Time
200
ns
SYNC Input Frequency Range
f
SYNC
100
500
kHz
SYNC/
SHDN
Falling Edge to
Shutdown Delay
t
SHDN
50
μs
SYNC/
SHDN
Input High Voltage
SYNC/
SHDN
Input Low Voltage
V
IH
V
IL
2.0
V
V
0.45
3.0
10
V
SYNC/
SHDN
= 5V
V
SYNC/
SHDN
= 28V
EXT forced to 2V
EXT high or low
0.5
1.5
1
2
SYNC/
SHDN
Input Current
μA
EXT Sink/Source Current
EXT On-Resistance
I
EXT
A
R
ON(EXT)
5
ELECTRICAL CHARACTERISTICS
(V
CC
= SYNC/
SHDN,
V
CC
= 5V, V
LDO
= 5V, R
OSC
= 200k
,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PWM CONTROLLER
3
28
5.5
50
115
1
400
6
V
V
nA
mV
μA
μA
μA
Operating Input Voltage Range
V
CC
V
CC
= V
LDO
V
FB
= -0.05V
2.7
FB Input Current
Current-Limit Threshold
CS Input Current
V
CC
Supply Current (Note 1)
Shutdown Supply Current
REFERENCE AND LDO REGULATOR
I
FB
V
CS
I
CS
I
CC
85
CS = GND
V
FB
= -0.05V, V
CC
= 3V to 28V
SYNC/
SHDN
= GND, V
CC
= 28V
5V
V
CC
28V
3V
V
CC
28V
4.50
2.65
1.22
5.50
5.50
1.28
-10
LDO Output Voltage
V
LDO
R
LDO
= 400
V
REF to FB Voltage (Note 2)
REF Load Regulation
V
REF
R
REF
= 10k
, C
REF
= 0.22μF
I
REF
= 0 to 400μA
V
mV
REF Undervoltage Lockout
Threshold
Rising edge, 1% hysteresis (typ)
1.0
1.2
V
OSCILLATOR
R
OSC
= 100k
±
1%
R
OSC
= 200k
±
1%
R
OSC
= 500k
±
1%
425
222
85
575
278
115
Oscillator Frequency
f
OSC
kHz
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