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LM34919C-Q1 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM34919C-Q1
Descripción Electrónicos  LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM34919C-Q1 Datasheet(HTML) 1 Page - Texas Instruments

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VIN
SW
BST
LM34919C
VCC
SS
RON
4.5V - 50V
Input
VOUT
RTN
ISEN
SGND
FB
PGD
EN
PGD
VOUT
C1
C5
RON
REN
RPGD
C3
C4
L1
R3
C2
R2
R1
D1
C6
LM34919C-Q1
www.ti.com
SNVS831A – SEPTEMBER 2013 – REVISED DECEMBER 2013
LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator
Check for Samples: LM34919C-Q1
1
FEATURES
APPLICATIONS
2
AEC-Q100 qualified (Tj = -40°C to 125°C)
Automotive Safety and Infotainment
Maximum Switching Frequency: 2.6 MHz
High Efficiency Point-of-Load (POL) Regulator
Input Voltage Range: 4.5 V to 50 V
Telecommunication Buck Regulator
Integrated N-Channel buck switch
Secondary Side Post Regulator
Integrated Start-Up Regulator
DESCRIPTION
No Loop Compensation Required
The LM34919C Step Down Switching Regulator
Ultra-Fast Transient Response
features all of the functions needed to implement a
Operating Frequency Remains Constant with
low-cost, efficient, buck bias regulator capable of
Load Current and Input Voltage
supplying 0.6 A to the load. This buck regulator
contains an N-Channel Buck Switch and is available
Adjustable Output Voltage
in DSBGA and WSON packages. The constant on-
Power Good Output
time feedback regulation scheme requires no loop
Enable Input
compensation, results in fast load transient response,
and simplifies circuit implementation. The operating
Valley Current Limit at 0.64 A Typical
frequency remains constant with line and load
Precision Internal Voltage Reference
variations due to the inverse relationship between the
Low IQ Shutdown (<10 µA)
input voltage and the on-time. The valley current limit
results in a smooth transition from constant voltage to
Highly Efficient Operation
constant current mode when current limit is detected,
Thermal Shutdown
reducing the frequency and output voltage, without
12-Bump 2 mm x 2 mm DSBGA and 12-pin 4
the use of foldback. Additional features include:
mm x 4 mm WSON Packages
Power Good, enable, VCC undervoltage lockout,
thermal shutdown, gate drive undervoltage lockout,
and maximum duty cycle limiter.
Figure 1. Basic Step Down Regulator
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 © 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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