音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM2770SD-1215 Datasheet

  • LM2770SD-1215

  • High Efficiency Switched Capacitor Step-Down DC/DC Regulator...

  • 14頁

  • NSC

掃碼查看芯片數據手冊

上傳產品規(guī)格書

PDF預覽

LM2770 High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode
December 2004
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鈥檚). 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 (鈮?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鈥檚 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
鹵
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
55碌A 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
n
n
n
DSP Power Supplies
Baseband Power Supplies
Mobile Phones and Pagers
Portable Electronic Equipment
Typical Application Circuit
LM2770 Efficiency vs.
Low-Dropout Linear Regulator (LDO) Efficiency
20126011
20126001
漏 2004 National Semiconductor Corporation
DS201260
www.national.com

LM2770SD-1215 產品屬性

  • National Semiconductor (TI)

  • 5.5 V

  • 700 KHz

  • 1.2 V, 1.5 V

  • 0.25 A

  • 1

  • + 85 C

  • LLP EP

  • 2.7 V

  • 0.18 mV/mA

  • - 30 C

  • Reel

  • 1000

  • Step Down

LM2770SD-1215相關型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術客服：

0571-85317607

網站技術支持

13606545031

客服在線時間周一至周五
9:00-17:30

關注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯系人：

聯系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經采納，將有感恩紅包奉上哦！