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| 型号： | MAX867EUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 2.5MA 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.7 V ~ 6 V |
| 输入电压： | 0.8 V ~ 6 V |
| 频率 - 开关： | 250kHz |
| 电流 - 输出： | 2.5mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-uMAX |
3.3V/5V or Adjustable-Output,
Single-Cell DC-DC Converters
V OUT = V REF ( ________ )
R1 = R2 ( _____ - 1 )
Voltage Reference
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.
V IN
__________________Design Procedure
Output Voltage Selection
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:
R1 + R2
R2
where V REF = 1.25V.
To simplify resistor selection:
V OUT
V REF
V IN
C1
47 μ F
L1
330 μ H
C1
47 μ F
L1
330 μ F
5
LBI
MAX866
LX
OUT
8
6
D1
R1
V OUT
C2
47 μ F
5
LBI
MAX867
LX
OUT
8
6
D1
R1
V OUT
C2
47 μ F
1
SHDN
3/5
2
OUTPUT
1
SHDN
FB
2
SELECT
C3
0.1 μ F
3
REF
GND
LBO
4
C3
0.1 μ F
3
REF
GND
LBO
4
R2
7
L1 = COILCRAFT DO1608-334
D1 = MOTOROLA MBR0520LTI
Figure 2a. Standard Application Circuit—Preset Output
Voltage
7
L1 = COILCRAFT DO1608-334
D1 = MOTOROLA MBR0520LTI
Figure 2b. Standard Application Circuit—Adjustable Output
Voltage
8
_______________________________________________________________________________________
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相关代理商/技术参数 |
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| MAX867EUA-TG063 | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
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