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参数资料
| 型号： | MAX1771CSA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 500kHz |
| 占空比： | 92% |
| 电源电压： | 3 V ~ 16.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
MAX1771
12V or Adjustable, High-Efficiency,
Low I Q , Step-Up DC-DC Controller
3.5
3.0
2.5
2.0
V OUT = 5V
L = 22 μ H
R SENSE = 20m ?
R SENSE = 25m ?
R SENSE = 35m ?
3.5
3.0
2.5
2.0
V OUT = 12V
L = 22 μ H
R SENSE = 20m ?
R SENSE = 25m ?
R SENSE = 35m ?
1.5
1.5
1.0
0.5
0
R SENSE = 50m ?
R SENSE = 100m ?
1.0
0.5
0
R SENSE = 50m ?
R SENSE = 100m ?
2
3 4
5
2
4
6 8
10
12
INPUT VOLTAGE (V)
Figure 4a. Maximum Output Current vs. Input Voltage
(V OUT = 5V)
INPUT VOLTAGE (V)
Figure 4b. Maximum Output Current vs. Input Voltage
(V OUT = 12V)
3.5
3.0
2.5
V OUT = 15V
L = 22 μ H
R SENSE = 20m ?
R SENSE = 25m ?
0.8
0.6
V OUT = 24V
L =150 μ H
2.0
R SENSE = 35m ?
R SENSE = 50m ?
R SENSE = 100m ?
0.4
1.5
1.0
R SENSE = 50m ?
0.2
0.5
0
R SENSE = 100m ?
0
R SENSE = 200m ?
2
4
6
8 10 12
14
16
2
6
10
14
INPUT VOLTAGE (V)
Figure 4c. Maximum Output Current vs. Input Voltage
(V OUT = 15V)
approximately 2μs; select an inductor that allows the cur-
rent to ramp up to I LIM .
The standard operating circuits use a 22μH inductor.
If a different inductance value is desired, select L such
that:
V IN (max) x 2μs
L ≥ —————----—--
I LIM
Larger inductance values tend to increase the start-up
time slightly, while smaller inductance values allow the
coil current to ramp up to higher levels before the
switch turns off, increasing the ripple at light loads.
10
INPUT VOLTAGE (V)
Figure 4d. Maximum Output Current vs. Input Voltage
(V OUT = 24V)
Inductors with a ferrite core or equivalent are recom-
mended; powder iron cores are not recommended for
use with high switching frequencies. Make sure the
inductor’s saturation current rating (the current at which
the core begins to saturate and the inductance starts to
fall) exceeds the peak current rating set by R SENSE .
However, it is generally acceptable to bias the inductor
into saturation by approximately 20% (the point where
the inductance is 20% below the nominal value). For
highest efficiency, use a coil with low DC resistance,
preferably under 20m ? . To minimize radiated noise,
use a toroid, a pot core, or a shielded coil.
Table 1 lists inductor suppliers and specific recom-
mended inductors.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1771CSA+ | 功能描述:DC/DC 开关控制器 12/Adj V Low IQ Step-Up RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1771CSA+T | 功能描述:DC/DC 开关控制器 12/Adj V Low IQ Step-Up RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1771CSA+TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1771CSA-G05 | 功能描述:DC/DC 开关控制器 12/Adj V Low IQ Step-Up RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1771CSAT | 制造商:MAXIM 功能描述:DC/DC SWITCHING CONTROLLERS |
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