參數(shù)資料
型號： MAX746MJE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125
中文描述： SWITCHING CONTROLLER, CDIP16
封裝： CERDIP-16
文件頁數(shù)： 16/16頁
文件大?。?/td> 157K
代理商： MAX746MJE
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16
__________________Maxim Integrated Produc ts, 120 S an Gabriel Drive, S unnyvale, CA 94086 (408) 737-7600
1993 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
M
High-Effic ienc y, PWM, S tep-Down,
N-Channel DC-DC Controller
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Table 3. Component Suppliers
___________________Chip Topography
or equal to the N-FET’s V
GS
threshold voltage. Once
the switch is off, the voltage at EXT is pulled to GND
and the N-FET source voltage is a Schottky diode
drop below GND. However, this is not always the case
in the “in-between” mode, due to the changing duty
cycle inherent with DCM. When the device is at maxi-
mum duty cycle, EXT turns off at V
GS
, but the switch
sometimes turns on again after the minimum off-time
before EXT can be pulled to GND. This results in short
spikes, which can be seen on the EXT waveform in the
Typical Operating Characteristics.
AC Stability with Low Input/Output Differentials
At low input/output differentials, the inductor current
cannot slew quickly enough to respond to load
changes, so the output filter capacitor must hold up the
voltage as the load transient is applied. In Figure 1a’s
circuit, for V+ = 6V, increase the output filter capacitor
to 900μF (Sprague 595D low-ESR capacitors) to obtain
a transient response less than 250mV with a load step
from 0.1A to 3A. As V+ increases, the inductor current
slews faster, so the size of the output filter capacitor can
be reduced (see Table 1).
HIGH
AGND
EXT
SS
REF
SHDN
LBI LBO GND
CS
OUT
CC
FB
AV+
0.130"
(3.30mm)
0.080"
(2.03mm)
TRANSISTOR COUNT: 508;
SUBSTRATE CONNECTED TO HIGH.
V+
CP
相關(guān)PDF資料
PDF描述
MAX747 Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125
MAX747CPD Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125
MAX747CSD Parallel-Load 8-Bit Shift Registers 20-LCCC -55 to 125
MAX747EPD Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125
MAX747ESD Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125
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MAX7474EAE+T 功能描述:視頻 IC Adaptive Equalizer f/Vid Over Twist Pr RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
MAX7474EVKIT+ 功能描述:視頻 IC 開發(fā)工具 MAX7474 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Boards 類型:YPbPr to RGBHV Converters 工具用于評估:LMH1251 工作電源電壓:5 V
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