- 您現在的位置：買賣IC網 > PDF目錄361024 > LM2621MM (NATIONAL SEMICONDUCTOR CORP) Low Input Voltage, Step-Up DC-DC Converter PDF資料下載
參數資料
| 型號： | LM2621MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Low Input Voltage, Step-Up DC-DC Converter |
| 中文描述： | 2.85 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MINI, SO-8 |
| 文件頁數： | 5/10頁 |
| 文件大小： | 254K |
| 代理商： | LM2621MM |
Typical Performance Characteristics
(Continued)
Detailed Description
OPERATING PRINCIPLE
The LM2621 is designed to provide step-up DC-DC voltage
regulation in battery-powered and low-input voltage sys-
tems. It combines a step-up switching regulator, N-channel
power MOSFET, built-in current limit, thermal limit, and volt-
age reference in a single 8-pin MSOP package . The switch-
ing DC-DC regulator boosts an input voltage between 1.2V
and 14V to a regulated output voltage between 1.24V and
14V. The LM2621 starts from a low 1.1V input and remains
operational down to 0.65V.
This device is optimized for use in cellular phones and other
applications requiring a small size, low profile, as well as low
quiescent current for maximum battery life during stand-by
and shutdown. A high-efficiency gated-oscillator topology of-
fers an output of up to 1A.
Additional features include a built-in peak switch current
limit, and thermal protection circuitry.
GATED OSCILLATOR CONTROL SCHEME
A unique gated oscillator control scheme enables the
LM2621 to have an ultra-low quiescent current and provides
a high efficiency over a wide load range. The switching fre-
quency of the internal oscillator is programmable using an
external resistor and can be set between 300 kHz and 2
MHz.
Peak Inductor Current vs
Load Current
DS100934-10
Maximum Load Current vs
Input Voltage
DS100934-11
DS100934-14
FIGURE 1. Functional Diagram
L
www.national.com
5
相關PDF資料 |
PDF描述 |
|---|---|
| LM2621 | |
| LM2622 | |
| LM2623 | |
| LM2621MMX | Low Input Voltage, Step-Up DC-DC Converter |
| LM2651MTC-3.3 | Isolated Flyback Switching Regulator with 9V Output |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2621MM | 制造商:Texas Instruments 功能描述:DC/DC UP CONVERTER ADJ SMD 2621 |
| LM2621MM/NOPB | 功能描述:DC/DC 開關控制器 LOW INP VLTG,STEP-UP DC-DC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2621MM/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2621MMX | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2621MMX/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
發布緊急采購，3分鐘左右您將得到回復。