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參數(shù)資料
| 型號(hào)： | MAX866 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Hex Inverters 20-LCCC -55 to 125 |
| 中文描述： | 3.3V/5V或可調(diào)輸出、單節(jié)電池DC-DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 139K |
| 代理商： | MAX866 |
M
3.3V /5V or Adjustable-Output,
S ingle-Cell DC-DC Converters
8
_______________________________________________________________________________________
V oltage Referenc e
The precision voltage reference is suitable for driving
external loads, such as an analog-to-digital converter.
The voltage-reference output changes less than ±2%
when sourcing up to 250μA and sinking up to 20μA. If
the reference drives an external load, bypass it with
0.22μF to GND. If the reference is unloaded, bypass it
with at least 0.1μF.
Logic Inputs and Outputs
The 3/5 input is internally diode clamped to GND and
OUT, and should not be connected to signals outside
this range. The SHDN input and LBO output (open-
drain) are not clamped to V+ and can be pulled as high
as 7V regardless of the voltage at OUT
.
Do not leave
control inputs (3/5, LBI, or SHDN) floating.
__________________Design Proc edure
Output V oltage S elec tion
For the MAX866, you can select a 3.3V or 5V output volt-
age under logic control, or by tying 3/5 to GND or OUT.
The MAX867’s output voltage is set by two resistors, R1
and R2 (Figure 2b), which form a voltage divider
between the output and FB. Use the following equation
to determine the output voltage:
V
OUT
= V
REF
(
R1 + R2
)
R2
where V
REF
= 1.25V.
To simplify resistor selection:
OUT
V
REF
R1 = R2
(
V
)
C1
47
μ
F
L1
330
μ
F
V
IN
D1
C2
47
μ
F
R1
R2
LX
OUT
FB
LBO
LBI
REF
SHDN
GND
C3
0.1
μ
F
V
OUT
5
1
3
8
6
2
4
7
MAX867
L1 = COILCRAFT DO1608-334
D1 = MOTOROLA MBR0520LTI
C1
47
μ
F
L1
330
μ
H
V
IN
D1
C2
47
μ
F
R1
LX
OUT
3/5
LBO
LBI
REF
SHDN
GND
C3
0.1
μ
F
V
OUT
5
1
3
8
6
2
4
7
MAX866
L1 = COILCRAFT DO1608-334
D1 = MOTOROLA MBR0520LTI
OUTPUT
SELECT
Figure 2b. Standard Application Circuit—Adjustable Output
Voltage
Figure 2a. Standard Application Circuit—Preset Output
Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX866ESA | Hex Inverters 14-CDIP -55 to 125 |
| MAX867 | Hex Inverters 14-CFP -55 to 125 |
| MAX867ESA | 3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters |
| MAX866EUA | 3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters |
| MAX867EUA | 3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8660AETL+ | 功能描述:PMIC 解決方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8660AETL+T | 功能描述:PMIC 解決方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8660BETL+ | 功能描述:PMIC 解決方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8660BETL+T | 功能描述:PMIC 解決方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8660ETL/V+ | 功能描述:PMIC 解決方案 Low-IQ PMIC w/Dynamic V Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
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