PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8

LM2753 High Power Switched Capacitor Voltage Convertor/Flash LED Driver

February 2005

LM2753

High Power Switched Capacitor Voltage Convertor/Flash

LED Driver

General Description

The LM2753 is capable of driving a Flash LED with a pulsed

current of 400mA at an input voltage of 3.6V. A switched

capacitor doubler, the LM2753 provides a regulated 5V out-

put (V

OUT

) over an input supply range of 3.0V to 5.5V. The

switched output, I

OUT

, takes less than 10ns to turn on and

provide maximum current to a Flash LED. Flash LED current

is set via a ballast resistor. Continuous illumination current

(Torch Mode) is programmed by connecting a resistor be-

tween I

OUT

and V

OUT

. This device uses only three small,

low-cost ceramic capacitors.

LM2753 uses Pulse Frequency Modulation (PFM) regula-

tion. Typical operating frequency is 725kHz. Under no-load

conditions, LM2753 operates on only 60碌A(chǔ). If the output is

connected to ground, the charge pump stays in the gain of 1

which helps limit the input current to 300mA (typ.)

LM2753 is available in a 10-pin No Pullback Leadless Lead-

frame Package: LLP-10.

Features

n

n

n

n

n

n

n

n

n

Input Voltage Range: 3.0V to 5.5V

Regulated 5V Output

250mA Output Current with a 3.6V input

400mA Pulsed Output Current (up to 500ms duration)

60碌A(chǔ) (typ.) Quiescent Current

PFM Regulation

Inductor-less solution: requires only 3 small capacitors

<

1碌A(chǔ) Typical Shutdown Current

10-pin LLP Package (No Pullback):

3mm x 3mm x 0.75mm

Applications

n

Cell Phone Camera Flash

n

General Purpose Regulated Voltage Output, High

Current Supply

Typical Application Circuit

20140601

漏 2005 National Semiconductor Corporation

DS201406

www.national.com

next

LM2753相關(guān)型號PDF文件下載

• 型號
  版本
  描述
  廠商
  下載
• LM27
  英文版
  SOT-23, 3 Degree Celcious Accurate, 120-150 Degree Celcious ...
  NSC
  LM27
• LM27
  英文版
  SOT-23 ±3°C Accurate 120°C-150°C Factory ...
  NATIONAL
  LM27
• LM271
  英文版
  Seoul Semiconductor [CYAN LAMP LED]
  SEOUL
  LM271
• LM272
  英文版
  STMicroelectronics [DUAL POWER OPERATIONAL AMPLIFIER]
  
  LM272
• LM27A
  英文版
  【3∑C Accurate, 120∑C-150∑C Factory Preset Thermostat (LM...
  NSC
  LM27A
• LM2700
  英文版
  600kHz/1.25MHz, 2.5A, Step-up PWM DC/DC Converter
  NSC
  LM2700
• LM2700
  英文版
  600kHz/1.25MHz, 2.5A, Step-up PWM DC/DC Converter
  NSC [Natio...
  LM2700
• LM2702
  英文版
  TFT Panel Module
  NSC
  LM2702
• LM2702
  英文版
  TFT Panel Module
  NATIONAL
  LM2702
• LM2703
  英文版
  Micropower Step-up DC/DC Converter with 350mA Peak Current L...
  NSC
  LM2703
• LM2703
  英文版
  Micropower Step-up DC/DC Converter with 350mA Peak Current L...
  LM2703
• LM2704
  英文版
  Micropower Step-up DC/DC Converter with 550mA Peak Current L...
  NSC
  LM2704
• LM2704
  英文版
  Micropower Step-up DC/DC Converter with 550mA Peak Current L...
  LM2704
• LM2705
  英文版
  Micropower Step-up DC/DC Converter with 150mA Peak Current L...
  NSC
  LM2705
• LM2705
  英文版
  Micropower Step-up DC/DC Converter with 150mA Peak Current L...
  NATIONAL
  LM2705
• LM2706
  英文版
  National Semiconductor [Miniature, Variable, Step-Down DC-D...
  NSC
  LM2706
• LM2707
  英文版
  Inductive-Boost Series LED Driver with Programmable Oscillat...
  NSC
  LM2707
• LM2707
  英文版
  Inductive-Boost Series LED Driver with Programmable Oscillat...
  NATIONAL
  LM2707
• LM2710
  英文版
  Step-up PWM DC/DC Converter Integrated with 5 Buffers
  NSC
  LM2710
• LM2710
  英文版
  Step-up PWM DC/DC Converter Integrated with 5 Buffers
  NATIONAL
  LM2710

您可能感興趣的PDF文件資料

• LM2776DBVR
• LM2776DBVT
• LM2787
• LM2733
• LM27761DSGR
• LM2767
• LM2734
• LM2734YQMK
• LM2703
• LM2731XMF
• LM27341
• LM2738XMY

熱門IC型號推薦

• LPC47N217-JV
• LM3208TLX
• LTC3401EMS#TRPBF
• LP2985IM5X-2.5
• LM3478MM
• L5973D013TR
• LP2986IMM-3.3
• LNK408EG
• LBZX84C11LT1G
• L7805ACV
• LM336Z-5.0
• LP3965ES-ADJ