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

LM3670MF-1.875 Datasheet

  • LM3670MF-1.875

  • Miniature Step-Down DC-DC Converter for Ultra Low Voltage Ci...

  • 994.20KB

  • 17頁

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
December 2004
LM3670
Miniature Step-Down DC-DC Converter for Ultra Low
Voltage Circuits
General Description
The LM3670 step-down DC-DC converter is optimized for
powering ultra-low voltage circuits from a single Li-Ion cell or
3 cell NiMH/NiCd batteries. It provides up to 350 mA load
current, over an input voltage range from 2.5V to 5.5V. There
are several different fixed voltage output options available as
well as an adjustable output voltage version.
The device offers superior features and performance for
mobile phones and similar portable applications with com-
plex power management systems. Automatic intelligent
switching between PWM low-noise and PFM low-current
mode offers improved system control. During full-power op-
eration, a fixed-frequency 1 MHz (typ). PWM mode drives
loads from
鈭?0
mA to 350 mA max, with up to 95% efficiency.
Hysteretic PFM mode extends the battery life through reduc-
tion of the quiescent current to 15 碌A(chǔ) (typ) during light
current loads and system standby. Internal synchronous rec-
tification provides high efficiency (90 to 95% typ. at loads
between 1 mA and 100 mA). In shutdown mode (Enable pin
pulled low) the device turns off and reduces battery con-
sumption to 0.1 碌A(chǔ) (typ.).
The LM3670 is available in a SOT23-5 package. A high
switching frequency - 1 MHz (typ) - allows use of tiny
surface-mount components. Only three external surface-
mount components, an inductor and two ceramic capacitors,
are required.
Features
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
V
OUT
= adj (.7V min), 1.2, 1.5, 1.6, 1.8, 1.875, 2.5, 3.3V
2.5V
鈮?/div>
V
IN
鈮?/div>
5.5V
15 碌A(chǔ) typical quiescent current
350 mA maximum load capability
1 MHz PWM fixed switching frequency (typ.)
Automatic PFM/PWM mode switching
Available in fixed output voltages as well as an
adjustable version
SOT23-5 package
Low drop out operation - 100% duty cycle mode
Internal synchronous rectification for high efficiency
Internal soft start
0.1 碌A(chǔ) typical shutdown current
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd
batteries
Only three tiny surface-mount external components
required (one inductor, two ceramic capacitors)
Current overload protection
Applications
n
n
n
n
n
n
Mobile phones
Hand-Held Radios
Personal Digital Assistants
Palm-top PCs
Portable Instruments
Battery Powered Devices
Typical Application
20075801
FIGURE 1. 1.8V - Fixed Output Voltage - Typical Application Circuit
漏 2004 National Semiconductor Corporation
DS200758
www.national.com

LM3670MF-1.875 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 5.5 V

  • 1000 KHz

  • 1.875 V

  • 0.35 A

  • 1

  • + 85 C

  • SMD/SMT

  • SOT-23

  • - 40 C

  • Reel

  • 1000

LM3670MF-1.875相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    High Speed Differential Comparator
    NSC
  • 英文版
    High Speed Differential Comparator
  • 英文版
    High Speed Differential Comparators
    NSC
  • 英文版
    INFRARED LAMP LED
    SEOUL
  • 英文版
    High Speed Differential Comparators
  • 英文版
    National Semiconductor [LM363 Precision Instrumentation Amp...
    NSC
  • 英文版
    National Semiconductor [LM368-2.5 Precision Voltage Referen...
    NSC
  • 英文版
    Precision Voltage Reference
    NSC
  • 英文版
    Precision Voltage Reference
  • 英文版
    High Speed Differential Comparator
    NSC
  • 英文版
    High Speed Differential Comparator
    NSC
  • 英文版
    High Speed Differential Comparator
    NSC
  • 英文版
    Seoul Semiconductor [GREEN OVAL LAMP LED]
    SEOUL
  • 英文版
    National Semiconductor [High Speed Differential Comparators...
    NSC
  • 英文版
    National Semiconductor [High Speed Differential Comparators...
    NSC
  • 英文版
    High Speed Differential Comparators
    NSC
  • 英文版
    Lithium-Ion Battery Charger Controller
    NSC
  • 英文版
    Lithium-Ion Battery Charger Controller
  • 英文版
    Single Cell Lithium-Ion Battery Charger Controller
    NSC
  • 英文版
    Single Cell Lithium-Ion Battery Charger Controller

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(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)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(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！