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參數(shù)資料
| 型號(hào)： | LM2734YMK |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Thin SOT23 1A Load Step-Down DC-DC Regulator |
| 中文描述： | 2.5 A SWITCHING REGULATOR, 660 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | TSOT-23, 6 PIN |
| 文件頁數(shù)： | 1/22頁 |
| 文件大?。?/td> | 459K |
| 代理商： | LM2734YMK |
LM2734
Thin SOT23 1A Load Step-Down DC-DC Regulator
General Description
The LM2734 regulator is a monolithic, high frequency, PWM
step-down DC/DC converter in a 6-pin Thin SOT23 package.
It provides all the active functions to provide local DC/DC
conversion with fast transient response and accurate regu-
lation in the smallest possible PCB area.
With a minimum of external components and online design
support through WEBENCH
, the LM2734 is easy to use.
The ability to drive 1A loads with an internal 300m
NMOS
switch using state-of-the-art 0.5μm BiCMOS technology re-
sults in the best power density available. The world class
control circuitry allows for on-times as low as 13ns, thus
supporting exceptionally high frequency conversion over the
entire 3V to 20V input operating range down to the minimum
output voltage of 0.8V. Switching frequency is internally set
to 550kHz (LM2734Y) or 1.6MHz (LM2734X), allowing the
use of extremely small surface mount inductors and chip
capacitors. Even though the operating frequencies are very
high, efficiencies up to 90% are easy to achieve. External
shutdown is included, featuring an ultra-low stand-by current
of 30nA. The LM2734 utilizes current-mode control and in-
ternal compensation to provide high-performance regulation
over a wide range of operating conditions. Additional fea-
tures include internal soft-start circuitry to reduce inrush
current, pulse-by-pulse current limit, thermal shutdown, and
output over-voltage protection.
Features
n
Thin SOT23-6 package
n
3.0V to 20V input voltage range
n
0.8V to 18V output voltage range
n
1A output current
n
550kHz (LM2734Y) and 1.6MHz (LM2734X)
switching frequencies
n
300m
NMOS switch
n
30nA shutdown current
n
0.8V, 2% internal voltage reference
n
Internal soft-start
n
Current-Mode, PWM operation
n
WEBENCH online design tool
Applications
n
Local Point of Load Regulation
n
Core Power in HDDs
n
Set-Top Boxes
n
Battery Powered Devices
n
USB Powered Devices
n
DSL Modems
n
Notebook Computers
Typical Application Circuit
Efficiency vs Load Current
V
IN
= 5V, V
OUT
= 3.3V
20102301
20102345
WEBENCH
is a trademark of Transim.
October 2004
L
2004 National Semiconductor Corporation
DS201023
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2734YMK/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A LOAD STEP-DOWN DC-DC REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM2734YMKX | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM2734YMKX/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM2734YQMK | 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 550KHZ, 6TSOT 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 550KHZ, 6TSOT; Primary Input Voltage:20V; No. of Outputs:1; Output Voltage:18V; Output Current:1A; Voltage Regulator Case Style:SOT-23; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes |
| LM2734YQMK/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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