參數(shù)資料
型號(hào)： MAX741NEPP
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： Current-Mode SMPS Controller
中文描述： 1 A SWITCHING CONTROLLER, 160 kHz SWITCHING FREQ-MAX, PDIP20
封裝： PLASTIC, DIP-20
文件頁(yè)數(shù)： 8/12頁(yè)
文件大?。?/td> 231K
代理商： MAX741NEPP
Pin Desc ription
PIN
Common Input. Biased internally at midsupply. Bypass externally to GND with a 0.1μF capacitor. To over-
ride internal biasing, drive with an external supply.
COM
1
FUNCTION
NAME
Filter Input
IN
2
Positive Supply Input: +5V for MAX7400/MAX7403, +3V for MAX7404/MAX7407
V
DD
4
Ground
GND
3
Offset Adjust Input. To adjust output offset, bias OS externally. Connect OS to COM if no offset adjustment is
needed. Refer to
Offset and Common-Mode Input Adjustmentsection.
OS
6
Clock Input. To override the internal oscillator, connect to an external clock; otherwise, connect an external
capacitor (C
OSC
) from CLK to GND to set the internal oscillator frequency.
CLK
8
Shutdown Input. Drive low to enable shutdown mode; drive high or connect to V
DD
for normal operation.
SHDN
7
Filter Output
OUT
5
M
8th-Order, Lowpass, Elliptic ,
S witc hed-Capac itor Filters
8
_______________________________________________________________________________________
Typic al Operating Charac teristic s (c ontinued)
(V
DD
= +5V for MAX7400/MAX7403, V
DD
= +3V for MAX7404/MAX7407; V
COM
= V
OS
= V
DD
/ 2;
SHDN
= V
DD
; f
CLK
= 100kHz;
T
A
= +25°C; unless otherwise noted.)
0.96
0.98
0.97
1.00
0.99
1.03
1.02
1.01
1.04
-40
0
-20
20
40
60
80
100
NORMALIZED OSCILLATOR FREQUENCY
vs. TEMPERATURE
M
TEMPERATURE (°C)
N
C
OSC
= 390pF
MAX7400
MAX7403
MAX7404
MAX7407
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
2.5
3.5
SUPPLY VOLTAGE (V)
3.0
4.0
4.5
5.0
5.5
NORMALIZED OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
M
N
C
OSC
= 390pF
MAX7400
MAX7403
MAX7404
MAX7407
0.1
1
100
10
1000
10,000
0.01
1
0.1
10
100
1000
INTERNAL OSCILLATOR FREQUENCY
vs. C
OSC
CAPACITANCE
M
C
OSC
CAPACITANCE (nF)
O
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