參數(shù)資料
型號(hào)： MAX1742-MAX1842
廠商： Maxim Integrated Products, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： Replaced by TMS320C6410 : Digital Signal Processor 40-PDIP 0 to 0
中文描述： 1A/2.7A的1MHz，降壓型同步整流和內(nèi)部開(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 3/16頁(yè)
文件大小： 597K
代理商： MAX1742-MAX1842
M
1A/2.7A, 1MHz, Step-Down Regulators with
Synchronous Rectification and Internal Switches
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
CC
= 3.3V, FBSEL = GND,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
SYMBOL
MAX1742
Current-Limit Threshold
I
LIMIT
MAX1842
RMS LX Output Current
MAX1742
Idle Mode Current Threshold
I
IM
MAX1842
Switching Frequency
f
(Note 2)
No-Load Supply Current
I
IN
+ I
CC
V
FB
= 1.2V
Shutdown Supply Current
I
CC
(SHDN)
SHDN
= GND
PMOS Switch Off-Leakage
Current
Thermal Shutdown Threshold
T
SHDN
Hysteresis = 15
°
C
Undervoltage Lockout Threshold
V
UVLO
V
IN
falling, hysteresis = 90mV
FB Input Bias Current
I
FB
V
FB
= 1.2V
R
TOFF
= 110k
R
TOFF
= 30.1k
Off-Time Default Period
t
OFF
R
TOFF
= 499k
Off-Time Startup Period
t
OFF
FB = GND
On-Time Period
t
ON
(Note 2)
SS Source Current
I
SS
SS Sink Current
I
SS
V
SS
= 1V
SHDN
Input Current
I
SHDN
V
SHDN
= 0 to V
CC
SHDN
Input Low Threshold
V
IL
SHDN
Input High Threshold
V
IH
FBSEL Input Current
FBSEL = GND
FBSEL = REF
CONDITIONS
MIN
1.3
3.1
TYP
1.5
3.6
MAX
1.7
4.1
3.1
0.5
0.9
1
600
5
UNITS
A
A
0.1
0.3
0.3
0.6
350
<1
A
MHz
μA
μA
I
IN
SHDN =
GND
15
μA
160
2.6
60
1.00
0.30
4.5
4
t
OFF
5
°
C
V
nA
2.5
0
0.9
0.24
3.8
2.7
250
1.1
0.37
5.2
μs
μs
μs
μA
μA
μA
V
V
μA
0.4
4
100
-1
2.0
-4
6
1
0.8
+4
0.2
1.3
0.9
FBSEL = unconnected
0.7
VCC
- 0.2
0.7
VCC
+0.2
FBSEL Logic Thresholds
FBSEL = V
CC
V
CC
- 0.2
V
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