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参数资料
| 型号： | LM3370TLX-2613/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20 |
| 封装： | 3 X 2 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, , MO-211DG, MICRO, SMD-20 |
| 文件页数： | 7/26页 |
| 文件大小： | 5436K |
| 代理商： | LM3370TLX-2613/NOPB |
FORCED PWM MODE
The LM3370 auto mode can be bypassed by forcing the de-
vice to operate in PWM mode, this can be implemented
SOFT-START
The LM3370 has a soft start circuit that limits in-rush current
during start up. Soft start is activated only if EN goes from
logic low to logic high after V
IN reaches 2.7V.
LDO - LOW DROP OUT OPERATION
The LM3370 can operate at 100% duty cycle (no switching,
PFET switch completely on) for low drop out support of the
output voltage. In this way the output voltage will be controlled
down to the lowest possible input voltage. The minimum input
voltage needed to support the output voltage is V
IN,MIN =
I
LOAD*(RDSON,PFET + RINDUCTOR) + VOUT
I
LOAD
load current
R
DSON/PFET
drain to source resistance of PFET switch in the
triode region
R
INDUCTOR
inductor resistance
20167303
FIGURE 2. Operation in PFM Mode and Transfer to PWM Mode
15
www.national.com
LM3370
相关PDF资料 |
PDF描述 |
|---|---|
| LM3370TL-2613/NOPB | 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20 |
| LM3420A12.6MDA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-8.2MWA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-4.2MWA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM3420A-4.2MDA | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3370TLX-3006 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TLX-3006/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 |
| LM3370TLX-3008 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
| LM3370TLX-3008/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 |
| LM3370TLX-3022 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function |
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