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LM2653MTC-ADJ Datasheet

  • LM2653MTC-ADJ

  • 1.5A High Efficiency Synchronous Switching Regulator

  • 248.89KB

  • 14頁

  • NSC

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LM2653 1.5A High Efficiency Synchronous Switching Regulator
March 2001
LM2653
1.5A High Efficiency Synchronous Switching Regulator
General Description
The LM2653 switching regulator provides high efficient
power conversion over a 100:1 load range (1.5A to 15 mA).
This feature makes the LM2653 an ideal fit in
battery-powered applications.
Synchronous rectification is used to achieve up to 97%
efficiency. At light loads, the LM2653 enters a low power
hysteretic or 鈥渟leep鈥?mode to keep the efficiency high. In
many applications, the efficiency still exceeds 80% at 15 mA
load. A shutdown pin is available to disable the LM2653 and
reduce the supply current to 7碌A(chǔ).
All the power, control, and drive functions are integrated
within the ICs. The ICs contain patented current sensing
circuity for current mode control. This feature eliminates the
external current sensing resistor required by other
current-mode DC-DC converters.
The ICs have a 300 kHz fixed frequency internal oscillator.
The high oscillator frequency allows the use of extremely
small, low profile components.
Protection features include thermal shutdown, input under-
voltage lockout, adjustable soft-start, cycle by cycle current
limit, output overvoltage and undervoltage protections.
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1.5V to 5.0V adjustable output voltage
0.1鈩?Switch On Resistance
300 kHz fixed frequency internal oscillator
7 碌A(chǔ) shutdown current
Patented current sensing for current mode control
Input undervoltage lockout
Output overvoltage shutdown protection
Output undervoltage shutdown protection
Adjustable soft-start
Adjustable PGOOD delay
Current limit and thermal shutdown
Applications
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Webpad
Personal digital assistants (PDAs)
Computer peripherals
Battery-powered devices
Notebook computer video supply
Handheld scanners
GXM I/O and core voltage
High efficiency 5V conversion
Features
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Efficiency up to 97%
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4V to 14V input voltage range
Typical Application
Efficiency vs Load Current
(V
IN
= 5V, V
OUT
= 3.3V)
10104930
10104902
漏 2001 National Semiconductor Corporation
DS101049
www.national.com

LM2653MTC-ADJ 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 1.5 V to 5 V

  • 1.5 A

  • 330 KHz

  • SMD/SMT

  • TSSOP-16

  • Tube

  • 1

  • 92

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