- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44551 > LM2770SDX-1215/NOPB (NATIONAL SEMICONDUCTOR CORP) SWITCHED CAPACITOR REGULATOR, 925 kHz SWITCHING FREQ-MAX, DSO10 PDF資料下載
參數(shù)資料
| 型號(hào)： | LM2770SDX-1215/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 925 kHz SWITCHING FREQ-MAX, DSO10 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, LEAD FREE, PLL-10 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 796K |
| 代理商： | LM2770SDX-1215/NOPB |
LM2770
High Efficiency Switched Capacitor Step-Down DC/DC
Regulator with Sleep Mode
General Description
The LM2770 is a switched capacitor step-down regulator
that is ideal for powering low-voltage applications in portable
systems. The LM2770 can supply load currents up to 250mA
and operates over an input voltage range of 2.7V to 5.5V.
This makes the LM2770 a great choice for systems powered
by 1-cell Li-Ion batteries and chargers. The output voltage of
the LM2770 can be dynamically switched between two out-
put levels with a logic input pin. Output voltage pairs cur-
rently available include 1.2V/1.5V and 1.2V/1.575V. Other
pairs of voltage options can be developed upon request.
LM2770 efficiency is superior to both fixed-gain switched
capacitor buck regulators and low-dropout linear regulators
(LDO’s). Multiple fractional gains maximize power efficiency
over the entire input voltage and output current ranges. The
LM2770 can also be switched into a low-power sleep mode
when load currents are light (
≤ 20mA). In sleep mode, the
charge pump is off, and the output is driven with a low-noise,
low-power linear regulator.
Soft-start, short-circuit protection, current-limit protection,
and thermal-shutdown protection are also included. The
LM2770 is available in National’s small 10-pin Leadless
Leadframe Package (LLP-10).
Features
n
High Efficiency Multi-Gain Architecture: Peak Power
Efficiency >85%
n
Output Voltage Pairs: 1.2V/1.5V and 1.2V/1.575V
n
Dynamic Output Voltage Selection
n
±3% Output Voltage Accuracy
n
Output Currents up to 250mA
n
2.7V to 5.5V Input Range
n
Low-Supply-Current Sleep Mode
n
55A Quiescent Supply Current in Full-Power Mode
n
Soft-Start
n
Short-Circuit Protection in Full-Power Mode
n
Current-Limit Protection in Sleep Mode
n
LLP-10 Package (3mm x 3mm x 0.8mm)
Applications
n
DSP Power Supplies
n
Baseband Power Supplies
n
Mobile Phones and Pagers
n
Portable Electronic Equipment
Typical Application Circuit
20126001
LM2770 Efficiency vs.
Low-Dropout Linear Regulator (LDO) Efficiency
20126011
December 2004
LM2770
High
Efficiency
Switched
Capacitor
Step-Down
DC/DC
Regulator
with
Sleep
Mode
2004 National Semiconductor Corporation
DS201260
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2788MM-2.0/NOPB | SWITCHED CAPACITOR REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2788MM-1.5/NOPB | SWITCHED CAPACITOR REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2788MMX-1.5/NOPB | SWITCHED CAPACITOR REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2794BL/NOPB | SWITCHED CAPACITOR REGULATOR, 675 kHz SWITCHING FREQ-MAX, PBGA14 |
| LM2797MM-1.8/NOPB | 0.12 A SWITCHED CAPACITOR REGULATOR, PDSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2771 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low-Ripple 250mA Switched Capacitor Step-Down DC/DC Converter |
| LM2771SD | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM2771SD/NOPB | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM2771SDEV | 功能描述:電源管理IC開發(fā)工具 LM2771SD EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM2771SDX | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。