Buck Controller. LM5141-Q1 Datasheet

LM5141-Q1 Controller. Datasheet pdf. Equivalent

Part LM5141-Q1
Description Wide Input Range Synchronous Buck Controller
Feature Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Des.
Manufacture etcTI
Datasheet
Download LM5141-Q1 Datasheet



LM5141-Q1
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
LM5141-Q1
SNVSAJ6D – JULY 2016 – REVISED DECEMBER 2017
LM5141-Q1 Wide Input Range Synchronous Buck Controller
1 Features
1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• VIN: 3.8 V to 65 V (70 V Absolute Maximum)
• Output: Fixed 3.3 V, 5 V, or Adjustable From
1.5 V to 15 V with ±0.8% Accuracy
• Fixed 2.2-MHz or 440-kHz Switching Frequency
with ±5% Accuracy
• High-Side and Low-Side Gate Drive With Slew-
Rate Control
• Optional Frequency Shift by Varying an Analog
Voltage or RT Resistor
• Optional Synchronization to an External Clock
• Optional Spread Spectrum
• Shutdown Mode IQ: 10 µA Typical
• Low Standby Mode IQ: 35 µA Typical
• 75-mV Current Limit Threshold with ±0.9%
Accuracy
• External Resistor or DCR Current Sensing
• Output Enable Logic Input
• Hiccup Mode for Sustained Overload
• Power-Good Indication Output
• Selectable Diode Emulation or Forced Pulse-
Width Modulation
• 24-pin VQFN Package With Wettable Flanks
• Create a Custom Design Using the LM5141-Q1
With the WEBENCH® Power Designer
2 Applications
• Automotive Applications Including:
– Infotainment Systems
– Instrumentation Clusters
– Advanced Driver Assistance Systems (ADAS)
3 Description
The LM5141-Q1 is a synchronous buck controller,
intended for high voltage wide VIN step-down
converter applications. The control method is peak
current mode control. Current mode control provides
inherent line feed-forward, cycle-by-cycle current
limiting, and ease-of-loop compensation. The
LM5141-Q1 features slew rate control to simplify the
compliance with CISPR and automotive EMI
requirements.
The LM5141-Q1 has two selectable switching
frequencies: 2.2 MHz and 440 kHz. Gate drivers with
slew rate Control that can be adjusted to reduce EMI.
In light or no-load conditions, the LM5141-Q1
operates in skip cycle mode for improved low power
efficiency. The LM5141-Q1 has a high voltage bias
regulator with automatic switch-over to an external
bias to reduce the IQ current from VIN. Additional
features include frequency synchronization, cycle-by-
cycle current limit, hiccup mode fault protection for
sustained overload, and power good output.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5141-Q1
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
CRES
VIN
CIN
CSS
CDITH
Simplified Schematic
RES
SS
DITH
EN
DEMB
VIN VCC
LM5141-Q1
HB
HO
HOL
SW
LO
LOL
PGND
PG
CS
VOUT
VCCX
COMP
DBST
CBST
CVCC
RCOMP CCOMP
LOUT
RSENSE
VOUT
COUT
AGND
RT
RT
FB
OSC VDDA
CVDDA
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



LM5141-Q1
LM5141-Q1
SNVSAJ6D – JULY 2016 – REVISED DECEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics .......................................... 8
6.7 Typical Characteristics .............................................. 9
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 13
8 Application and Implementation ........................ 22
8.1 Application Information............................................ 22
8.2 Typical Application ................................................. 22
9 Power Supply Recommendations...................... 35
10 Layout................................................................... 35
10.1 Layout Guidelines ................................................. 35
10.2 Layout Examples................................................... 36
11 Device and Documentation Support ................. 39
11.1 Custom Design With WEBENCH® Tools ............. 39
11.2 Receiving Notification of Documentation Updates 39
11.3 Community Resources.......................................... 39
11.4 Trademarks ........................................................... 39
11.5 Electrostatic Discharge Caution ............................ 39
11.6 Glossary ................................................................ 39
12 Mechanical, Packaging, and Orderable
Information ........................................................... 39
4 Revision History
Changes from Revision C (February 2017) to Revision D
Page
• Added top navigator icon for TI Design reference design ..................................................................................................... 1
• Changed "CDS18534Q5A" to "CSD18534Q5A" to fix typo.................................................................................................. 29
• Changed "+" to "×" in Equation 56 ...................................................................................................................................... 32
Changes from Revision B (January 2017) to Revision C
Page
• Changed the FBD with updates in the CS pin area ............................................................................................................. 12
• Updated ISTEP definition in Equation 28 ............................................................................................................................... 25
Changes from Revision A (July 2016) to Revision B
Page
• Added 'Systems' to the ADAS bullet in Applications ............................................................................................................. 1
• Changed Description text From: 'conducted EMI' To: 'EMI' ................................................................................................... 1
• Changed test conditions for RT parameter from: OSC = VDD to: OSC = GND ................................................................... 8
• Changed equation unit From: '0.815 Apk' To: '0.815 A' ....................................................................................................... 24
• Changed equation unit From: '6.41 Apk' To: '6.41 A' ........................................................................................................... 24
• Changed equation unit From: '8.81 Apk' To: ' 8.81 A' .......................................................................................................... 25
• Changed equation unit From: '0.235 ARMS' To: '0.235 A'...................................................................................................... 26
• Changed text From: 'a capacitance value greater than filter capacitor CIN' To: 'a capacitance value greater than 5
times the filter capacitor CIN' ................................................................................................................................................ 28
• Changed equation text From: '62A' and '105 nc' To: '(6A)2' and '105 nC' ............................................................................ 28
• Added GCS to equation definition list .................................................................................................................................... 31
• Added Ω and µS symbols to equation text ........................................................................................................................... 33
Changes from Original (July 2016) to Revision A
Page
• Changed Product Preview to Production Data Release ........................................................................................................ 1
2 Submit Documentation Feedback
Product Folder Links: LM5141-Q1
Copyright © 2016–2017, Texas Instruments Incorporated





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)