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參數(shù)資料
| 型號(hào)： | LM2623 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 254K |
| 代理商： | LM2623 |
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
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5
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PDF描述 |
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| LM2621MMX | Low Input Voltage, Step-Up DC-DC Converter |
| LM2651MTC-3.3 | Isolated Flyback Switching Regulator with 9V Output |
| LM2724ALD | High Speed 3A Synchronous MOSFET Driver |
| LM2724ALDX | High Speed 3A Synchronous MOSFET Driver |
| LM2724A | High Speed 3A Synchronous MOSFET Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2623_04 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:General Purpose, Gated Oscillator Based, DC/DC Boost Converter |
| LM2623_05 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:General Purpose, Gated Oscillator Based, DC/DC Boost Converter |
| LM2623ALD | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2623ALD/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2623ALDX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:General Purpose, Gated Oscillator Based, DC/DC Boost Converter |
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