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參數資料
| 型號： | LM2750LD-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Noise, 5.0V Regulated Switched Capacitor Voltage Converter |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, PDSO10 |
| 封裝： | 3 X 3 MM, LLP-10 |
| 文件頁數： | 1/15頁 |
| 文件大?。?/td> | 370K |
| 代理商： | LM2750LD-ADJ |
LM2750
Low Noise Switched Capacitor Boost Regulator
General Description
The LM2750 is a regulated switched-capacitor doubler that
produces a low-noise output voltage. The 5.0V output volt-
age option (LM2750-5.0) can supply up to 120mA of output
current over a 2.9V to 5.6V input range, as well as up to
40mA of output current when the input voltage is as low as
2.7V. An adjustable output voltage option with similar output
current capabilities is also available (LM2750-ADJ). The
LM2750 has been placed in National’s 10-pin LLP, a pack-
age with excellent thermal properties that keeps the part
from overheating under almost all rated operating conditions
A perfect fit for space-constrained, battery-powered applica-
tions, the LM2750 requires only 3 external components: one
input capacitor, one output capacitor, and one flying capaci-
tor. Small, inexpensive ceramic capacitors are recom-
mended for use. These capacitors, in conjunction with the
1.7MHz fixed switching frequency of the LM2750, yield low
output voltage ripple, beneficial for systems requiring a low-
noise supply. Pre-regulation minimizes input current ripple,
reducing input noise to negligible levels.
A tightly controlled soft-start feature limits inrush currents
during part activation. Shutdown completely disconnects the
load from the input. Output current limiting and thermal
shutdown circuitry protect both the LM2750 and connected
devices in the event of output shorts or excessive current
loads.
Features
n
Inductorless solution: Application requires only 3 small
ceramic capacitors
n
Fixed 5.0V output and adjustable output voltage options
available
n
85% Peak Efficiency
70% Average Efficiency over Li-Ion Input Range
(2.9V-to-4.2V)
n
Output Current up to 120mA with 2.9V
≤
V
IN
≤
5.6V
Output Current up to 40mA with 2.7V
≤
V
IN
≤
2.9V
n
Wide Input Voltage Range: 2.7V to 5.6V
n
Fixed 1.7MHz switching frequency for a low-noise,
low-ripple output signal
n
Pre-regulation minimizes input current ripple, keeping
the battery line (V
IN
) virtually noise-free
n
Tiny LLP package with outstanding power dissipation:
Usually no derating required.
n
Shutdown Supply Current less than 2μA
Applications
n
White and Colored LED-based Display Lighting
n
Cellular Phone SIM cards
n
Audio Amplifier Power Supplies
n
General Purpose Li-Ion-to-5V Conversion
Typical Application Circuit
20035101
July 2004
L
2004 National Semiconductor Corporation
DS200351
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2750LD-ADJ/NOPB | 功能描述:開關變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| LM2750LD-ADJEV | 功能描述:BOARD EVAL LM2750LD-ADJ RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM2750LDX-5.0 | 功能描述:開關變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| LM2750LDX-5.0/NOPB | 功能描述:開關變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| LM2750LDX50 | 制造商:NSC 功能描述:_ |
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