Converter. LM5165 Datasheet

LM5165 Datasheet PDF


Part

LM5165

Description

150-mA Synchronous Buck Converter

Manufacture

etcTI

Page 30 Pages
Datasheet
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LM5165 Datasheet
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LM5165
SNVSA47B – FEBRUARY 2016 – REVISED JULY 2017
LM5165 3-V to 65-V Input, 150-mA Synchronous Buck Converter With Ultra-Low IQ
1 Features
1 Wide Input Voltage Range of 3 V to 65 V
• 10.5-µA No-Load Quiescent Current
• –40°C to 150°C Junction Temperature Range
• Fixed (3.3-V, 5-V) or Adjustable Output Voltages
• Meets EN55022 / CISPR 22 EMI Standards
• Integrated 2-Ω PMOS Buck Switch
– Supports 100% Duty Cycle for Low Dropout
• Integrated 1-Ω NMOS Synchronous Rectifier
– Eliminates External Rectifier Diode
• Programmable Current Limit Setpoint (4 Levels)
• Selectable PFM or COT Mode Operation
• 1.223-V ±1% Internal Voltage Reference
• 900-µs Internal or Programmable Soft Start
• Active Slew Rate Control for Low EMI
• Diode Emulation Mode and Pulse Skipping for
Ultra-High Light-Load Efficiency Performance
• Monotonic Start-Up into Prebiased Output
• No Loop Compensation or Bootstrap Components
• Precision Enable and Input UVLO With Hysteresis
• Pin-to-pin Compatible With the LM5166
• Thermal Shutdown Protection With Hysteresis
• 10-Pin, 3-mm × 3-mm VSON Package
• Create a Custom Regulator Design Using
WEBENCH® Power Designer
3 Description
The LM5165 device is a compact, easy-to-use, 3-V to
65-V, ultra-low IQ synchronous buck converter with
high efficiency over wide input voltage and load
current ranges. With integrated high-side and low-
side power MOSFETs, up to 150-mA of output
current can be delivered at fixed output voltages of
3.3 V or 5 V or at an adjustable output. The converter
is designed to simplify implementation while providing
options to optimize the performance for the target
application. Pulse Frequency Modulation (PFM) mode
is selected for optimal light-load efficiency or
Constant On-Time (COT) control for nearly constant
operating frequency. Both control schemes do not
require loop compensation while providing excellent
line and load transient response and short PWM on-
time for large step-down conversion ratios.
The high-side P-channel MOSFET can operate at
100% duty cycle for lowest dropout voltage and does
not require a bootstrap capacitor for gate drive. Also,
the current limit setpoint is adjustable to optimize
inductor selection for a particular output current
requirement. Selectable and adjustable start-up
timing options include minimum delay (no soft start),
internally fixed (900 µs), and externally programmable
soft start using a capacitor. An open-drain PGOOD
indicator can be used for sequencing, fault reporting,
and output voltage monitoring. The LM5165 buck
converter is available in a 10-pin, 3-mm × 3-mm,
thermally-enhanced VSON-10 package with 0.5-mm
pin pitch.
2 Applications
• 4–20 mA Loop-Powered Sensors
• Automotive and Battery-Powered Equipment
• High-Voltage LDO Replacement
• Industrial Control Systems
• General-Purpose Bias Supplies
Typical Schematic, Fixed Output
VIN = 3V...65V
CIN
1F
VIN SW
LM5165X
EN VOUT
LF
68 H
VOUT = 5V *
COUT
22 F
PGOOD
SS
HYS
ILIM
RT GND
* VOUT tracks VIN
if VIN < 5V
PART #
LM5165
LM5165X
LM5165Y
Device Information(1)
OUTPUT
PACKAGE
Adjustable
5-V fixed
VSON (10)
3.3-V fixed
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Efficiency, VOUT = 5 V
100
90
80
70
60
50
VIN = 8V
VIN = 12V
VIN = 24V
40 VIN = 36V
VIN = 65V
30
0.1 1 10 30
Output Current (mA)
D101
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.

LM5165 Datasheet
LM5165
SNVSA47B – FEBRUARY 2016 – REVISED JULY 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......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 6
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics .......................................... 7
6.7 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 14
7.4 Device Functional Modes........................................ 20
8 Applications and Implementation ...................... 21
8.1 Application Information............................................ 21
8.2 Typical Applications ................................................ 21
9 Power Supply Recommendations...................... 35
10 Layout................................................................... 35
10.1 Layout Guidelines ................................................. 35
10.2 Layout Example .................................................... 37
11 Device and Documentation Support ................. 38
11.1 Device Support .................................................... 38
11.2 Documentation Support ........................................ 38
11.3 Related Links ........................................................ 39
11.4 Receiving Notification of Documentation Updates 39
11.5 Community Resources.......................................... 39
11.6 Trademarks ........................................................... 39
11.7 Electrostatic Discharge Caution ............................ 39
11.8 Glossary ................................................................ 39
12 Mechanical, Packaging, and Orderable
Information ........................................................... 39
4 Revision History
Changes from Revision A (March 2016) to Revision B
Page
• Changed EN absolute maximum voltage from (VIN + 0.3 V) to 68 V .................................................................................... 5
• Deleted note 5 under Absolute Maximum Ratings table ........................................................................................................ 5
• Changed EN operating voltage from VIN to 65 V .................................................................................................................. 6
• Deleted note 2 under Recommended Operating Conditions table......................................................................................... 6
• Changed RT resistor equation divisor from 1.6 to 1.75 and updated Table 1 accordingly .................................................. 16
• Added link to TI Design TIDA-00666.................................................................................................................................... 21
• Added more information in the Device and Documentation Support section ...................................................................... 38
Changes from Original (February 2016) to Revision A
Page
• Product Preview to Production Data Release ....................................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: LM5165
Copyright © 2016–2017, Texas Instruments Incorporated


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity LM5165 SNVSA47B – FEBRUARY 20 16 – REVISED JULY 2017 LM5165 3-V to 65-V Input, 150-mA Synchronous Buck Con verter With Ultra-Low IQ 1 Features 1 Wide Input Voltage Range of 3 V to 6 5 V • 10.5-µA No-Load Quiescent Curr ent • –40°C to 150°C Junction Tem perature Range • Fixed (3.3-V, 5-V) o r Adjustable Output Voltages • Meets EN55022 / CISPR 22 EMI Standards • In tegrated 2-Ω PMOS Buck Switch – Supp orts 100% Duty Cycle for Low Dropout Integrated 1-Ω NMOS Synchronous Rect ifier – Eliminates External Rectifier Diode • Programmable Current Limit S etpoint (4 Levels) • Selectable PFM o r COT Mode Operation • 1.223-V ±1% I nternal Voltage Reference • 900-µs I nternal or Programmable Soft Start • Active Slew Rate Control for Low EMI Diode Emulation Mode and Pulse Skippi ng for Ultra-High Light-Load Efficiency Performance • Monotonic Start-Up into Prebiased Output • No Loop Compensation or Bootstrap Components • P.
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