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参数资料
| 型号： | LM2622-ADJMWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | WAFER |
| 文件页数： | 3/19页 |
| 文件大小： | 478K |
| 代理商： | LM2622-ADJMWC |
Operation (Continued)
The phase margin can also be improved by adding C
C2 as
discussed earlier in the section. The equation for A
DC is
given below with additional equations required for the calcu-
lation:
mc ) 0.072fs (in V/s)
where R
L is the minimum load resistance, VIN is the maxi-
mum input voltage, g
m is the error amplifier transconduc-
tance found in the
Electrical Characteristics table, and R
D-
SON
is the value chosen from the graph ’R
DSON vs. VIN ’in
the
Typical Performance Characteristics section.
Layout Considerations
The input bypass capacitor C
IN, as shown in the typical
operating circuit, must be placed close to the IC. This will
reduce copper trace resistance which effects input voltage
ripple of the IC. For additional input voltage filtering, a 100nF
bypass capacitor can be placed in parallel with C
IN, close to
the V
IN pin, to shunt any high frequency noise to ground. The
output capacitor, C
OUT, should also be placed close to the
IC. Any copper trace connections for the C
OUT capacitor can
increase the series resistance, which directly effects output
voltage ripple. The feedback network, resistors R
FB1 and
R
FB2, should be kept close to the FB pin, and away from the
inductor, to minimize copper trace connections that can in-
ject noise into the system. Trace connections made to the
inductor and schottky diode should be minimized to reduce
power dissipation and increase overall efficiency. For more
detail on switching power supply layout considerations see
Application Note AN-1149:
Layout Guidelines for Switching
Power Supplies.
LM2622
www.national.com
11
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相关代理商/技术参数 |
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| LM2622EVAL | 功能描述:BOARD EVALUATION LM2622 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM2622MM-ADJ | 功能描述:DC/DC 开关控制器 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 |
| LM2622MM-ADJ/NOPB | 功能描述:DC/DC 开关控制器 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 |
| LM2622MMX-ADJ | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Up 2V to 12V 8-Pin MSOP T/R |
| LM2622MMX-ADJ/NOPB | 功能描述:DC/DC 开关控制器 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 |
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