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LM3495 Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças LM3495
Descrição Electrónicos  Emulated Peak Current Mode Buck Controller for Low Output Voltage
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

LM3495 Folha de dados(HTML) 1 Page - Texas Instruments

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FB
SNS
FPWM
PGND
CSL
LG
ILIM
SW/CSH
HG
BOOST
CF
RFB2
RFB1
CO
RILIM
CIN
Q1
Q2
CB
D1
VIN
VO
LM3495
SGND
FREQ/SYNC
COMP/SD
VIN
VLIN5
TRACK
CDD
CC
RC
RFRQ
VLIN5
CSYNC
L1
CINX
LM3495
www.ti.com
SNVS410F – FEBRUARY 2006 – REVISED APRIL 2013
LM3495 Emulated Peak Current Mode Buck Controller for Low Output Voltage
Check for Samples: LM3495
1
FEATURES
DESCRIPTION
The LM3495 is a PWM buck regulator which
2
Input Voltage from 2.9V to 18V
implements a unique emulated peak current mode
Output Voltage Adjustable from 0.6V to 5.5V
control. This control method eliminates the switching
Feedback Accuracy: ±1%
noise which typically limits current mode operation at
extremely short duty cycles and high operating
Low-Side Sensing, Programmable Current
frequency. The switching frequency is programmable
Limit without Sense Resistor
between 200 kHz and 1.5 MHz, and can also be
Input Under Voltage Lockout
synchronized to an external clock. The LM3495 is
Hiccup Mode Current Limit Protection
also very fault tolerant with both switch node short,
Eliminates Thermal Runaway During Fault
hiccup mode, and adaptive duty cycle limit protection.
A 0.6V 1% reference and glitch free pre-biased start-
Conditions
up ensure the most demanding digital loads operate
Internal Soft Start with Tracking Capability
reliably. Internal soft start and the ability to track the
200 kHz to 1.5 MHz Switching Frequency,
output of another supply make the LM3495 versatile
Synchronizable
and efficient.
On-Chip Gate Drivers
APPLICATIONS
Soft Output Discharge During Shutdown
Wide Input Voltage Buck Converters with Low
Startup into Output Pre-Bias
Voltage, High Accuracy Outputs
Operation from a Single Input Rail
Core Logic Regulators
Adaptive Duty Cycle Limit
High-Efficiency Buck Regulation
TSSOP-16 Package
Typical Application
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 © 2006–2013, 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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