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参数资料
| 型号： | MAX1804EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC FEEDBACK INTERGRATOR 10UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 反馈发生器 |
| 电流 - 电源： | 25µA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
External Four-Input Feedback Integrator for
Power Supplies
VIN
VL
C3
D1
1
2
C1
22 μ F
35V
4.5V TO 28V
4.7 μ F
CMPSH-3
16V
11
3
6
5
C2
10
V+
VL
DH 16
4
N1B
IRF7303
SHDN
SYNC
JU2
VL
3
2
JU4
3
3 JU1
2
1
2
0.1 μ F
6
2
5
SHDN
SKIP
SYNC
U1
MAX1653
BST 14
LX 15
DL 13
PGND 12
C4
0.1 μ F
2
8
3
1
7
N1A
IRF7303
L1
15 μ H
D2
MBR0530
R1
0.033 ?
1%
C7
220 μ F
10V
5V± 5%
R TOP
91k
1%
VOUT
PFET
I LOAD
REF
C5
0.33 μ F
3
REF
CSH 8
CSL 9
100k
4
GND
SS
FB 7
1
C6
VL
562k
R BOTTOM 100k
1%
0.01 μ F
V+
OUT
JU3
SHDN
IN1
100k
1M
0.01 μ F
ADJ
COMP
MAX1804
IN2
EXT
REF
Figure 2. Application Circuit with Step-Down Regulator
The MAX1804 only sinks current at OUT (Figure 4). The
maximum sink current and maximum regulator voltage
increase are limited by the minimum guaranteed OUT
current of 10μA. The maximum regulator output voltage
increase can be further limited by including a resistor
between OUT and the feedback point of the regulator.
If any of the IN_ inputs fall to 90% of the regulation set
point, they are automatically disabled and OUT contin-
ues to regulate according to the lowest remaining
active input. See Automatic Input Disable .
Adjusting the Regulation Set Point
The MAX1804 monitors the voltage at the IN1 – IN4
sense inputs and regulates the lowest active input to
four times the reference voltage at ADJ. The IN1 – IN4
regulation set point is calculated as:
V IN_ = 4 ? V ADJ
IN3
IN4
The total error in the MAX1804 regulation set point is:
total percentage error = [(IN_scale factor x V ADJ +
IN_offset) / (4 x V ADJ )] x 100%
The maximum IN_ voltage is 5.5V. Use the MAX1804 for
higher output voltages by using an external divider to
divide down the desired output voltage at the IN1 – IN4
pins. Since the IN_ input bias current is fairly high (1.5μA
typ), choose the resistive divider accordingly.
Automatic Input Disable
The MAX1804 has an input buffer stage that monitors
the sense inputs (IN1 – IN4) and connects the lowest to
its internal integrator (Figure 4). Each input is com-
pared to 90% of the set point. If the input falls below
this value, the input buffer is disabled and the output
voltage is adjusted according to the lowest of the
remaining active inputs (see Automatic Input Disable in
Typical Operating Characteristics ). If all four sense
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| MAX1805MEE+ | 功能描述:板上安装温度传感器 Remote/Local Temp w/SMBus Serial Int RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1805MEE+T | 功能描述:板上安装温度传感器 Remote/Local Temp w/SMBus Serial Int RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1805MEE-T | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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