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參數(shù)資料
| 型號： | MAX1776EUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter |
| 中文描述： | 2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 740K |
| 代理商： | MAX1776EUA |
M
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
_______________________________________________________________________________________
9
Input-Output (Dropout) Voltage
A step-down converter
’
s minimum input-to-output volt-
age differential (dropout voltage) determines the lowest
usable supply voltage. In battery-powered systems,
this limits the useful end-of-life battery voltage. To maxi-
mize battery life, the MAX1776 operates with duty
cycles up to 100%, which minimizes the dropout volt-
age and eliminates switching losses while in dropout.
When the supply voltage approaches the output volt-
age, the P-channel MOSFET remains on continuously to
supply the load.
Dropout voltage is defined as the difference between
the input and output voltages when the input is low
enough for the output to drop out of regulation. For a
step-down converter with 100% duty cycle, dropout
depends on the MOSFET drain-to-source on-resistance
and inductor series resistance; therefore, it is propor-
tional to the load current:
V
DROPOUT
= I
OUT
(R
DS(ON) +
R
INDUCTOR
)
Figure 2. Simplified Functional Diagram
OUTPUT
D1
L1
C
OUT
MAX1776
C
IN
GND
LX
FB
OUT
MINIIMUM
OFF-TIME
DELAY
MAXIMUM
ON-TIME
DELAY
V
SET
1.25V
100mV
R
Q
S
ILIM
SET
ILIM2
ILIM
SHDN
D
Figure 3. Discontinuous-Conduction Operation
LX WAVEFORM, CIRCUIT 1
V
IN
= 15V, I
LOAD
= 500mA
V
LX
I
L
V
OUT
1A
10V
0
2
μ
s/div
50mV/div
0
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1776EUA+ | 功能描述:直流/直流開關轉換器 24V 600mA 100% Duty Cycle Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1776EUA+ | 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW)) |
| MAX1776EUA+ | 制造商:Maxim Integrated Products 功能描述:CONVERTER STEP DOWN 24V 0.6A SMD 制造商:Maxim Integrated Products 功能描述:CONVERTER, STEP DOWN, 24V 0.6A, SMD |
| MAX1776EUA+T | 功能描述:直流/直流開關轉換器 24V 600mA 100% Duty Cycle Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX1776EUA-T | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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