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LM3488 数据表(PDF) 1 Page - Texas Instruments

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部件名 LM3488
功能描述  High Efficiency Low-Side N-Channel Controller for Switching Regulators
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM3488 数据表(HTML) 1 Page - Texas Instruments

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LM3488
LM3488-Q1
www.ti.com
SNVS089M – JULY 2000 – REVISED MARCH 2013
High Efficiency Low-Side N-Channel Controller for Switching Regulators
Check for Samples: LM3488, LM3488-Q1
1
FEATURES
DESCRIPTION
The LM3488 is a versatile Low-Side N-FET high
2
LM3488Q is AEC-Q100 qualified and
performance controller for switching regulators. It is
manufactured on an Automotive Grade Flow
suitable for use in topologies requiring low side FET,
8-lead VSSOP package
such as boost, flyback, or SEPIC. Moreover, the
Internal push-pull driver with 1A peak current
LM3488 can be operated at extremely high switching
frequency in order to reduce the overall solution size.
capability
The switching frequency of LM3488 can be adjusted
Current limit and thermal shutdown
to any value between 100kHz and 1MHz by using a
Frequency compensation optimized with a
single external resistor or by synchronizing it to an
capacitor and a resistor
external
clock.
Current
mode
control
provides
superior bandwidth and transient response, besides
Internal softstart
cycle-by-cycle current limiting. Output current can be
Current Mode Operation
programmed with a single external resistor.
Undervoltage Lockout with hysteresis
The LM3488 has built in features such as thermal
shutdown, short-circuit protection and over voltage
APPLICATIONS
protection. Power saving shutdown mode reduces the
Distributed Power Systems
total supply current to 5µA and allows power supply
sequencing. Internal soft-start limits the inrush current
Notebook, PDA, Digital Camera, and other
at start-up.
Portable Applications
Offline Power Supplies
KEY SPECIFICATIONS
Set-Top Boxes
Wide supply voltage range of 2.97V to 40V
100kHz to 1MHz Adjustable and
Synchronizable clock frequency
±1.5% (over temperature) internal reference
5µA shutdown current (over temperature)
TYPICAL APPLICATION CIRCUIT
Figure 1. Typical SEPIC Converter
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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