Voltage Regulator. LM76003 Datasheet

LM76003 Regulator. Datasheet pdf. Equivalent

LM76003 Datasheet
Recommendation LM76003 Datasheet
Part LM76003
Description Synchronous Step-Down Voltage Regulator
Feature LM76003; Product Folder Order Now Technical Documents Tools & Software Support & Community LM76002, LM76.
Manufacture etcTI
Datasheet
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etcTI LM76003
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LM76002, LM76003
SNVSAK0A – OCTOBER 2017 – REVISED OCTOBER 2019
LM76002/LM76003 3.5-V to 60-V, 2.5-A/3.5-A Synchronous
Step-Down Voltage Regulator
1 Features
1 Integrated synchronous rectification
• Input voltage 3.5 V to 60 V (65 V maximum)
• Output current:
– LM76002: 2.5 A
– LM76003: 3.5 A
• Output voltage 1 V to 95% VIN
• 15-µA Quiescent current in regulation
• Wide voltage conversion range
– tON-MIN = 65 ns (typical)
– tOFF-MIN = 95 ns (typical)
• System-level features
– Synchronization to external clock
– Power-good flag
– Precision enable
– Adjustable soft-start (6.3 ms default)
– Voltage tracking capability
• Pin-selectable FPWM operation
• Adjustable frequency range: 300 kHz to 2.2 MHz
• High-efficiency at light-load architecture (PFM)
• Protection features
– Cycle-by-cycle current limit
– Short-circuit protection with hiccup mode
– Overtemperature thermal shutdown protection
• Create a custom design using the
LM76002/LM76003 with the WEBENCH® Power
Designer
Simplified Schematic
VIN
CIN
CVCC
PVIN BOOT
EN
SW
PGND
LM76003
SS/TRK BIAS
RT
SYNC/MODE
FB
VCC
AGND
CBOOT
L
VOUT
COUT
RFBT
RFBB
2 Applications
Telecommunications infrastructure
Asset and fleet management systems
Video surveillance
Programmable logic controllers
3 Description
The LM76002/LM76003 regulator is an easy-to-use
synchronous step-down DC-DC converter capable of
driving up to 2.5 A (LM76002) or 3.5 A (LM76003) of
load current from an input up to 60 V. The
LM76002/LM76003 provides exceptional efficiency
and output accuracy in a very small solution size.
Peak current-mode control is employed. Additional
features such as adjustable switching frequency,
synchronization, FPWM option, power-good flag,
precision enable, adjustable soft start, and tracking
provide both flexible and easy-to-use solutions for a
wide range of applications. Automatic frequency
foldback at light load and optional external bias
improve efficiency. This device requires few external
components and has a pinout designed for simple
PCB layout with best-in-class EMI (CISPR22) and
thermal performance. Protection features include
input undervoltage lockout, thermal shutdown, cycle-
by-cycle current limit, and short-circuit protection. The
LM76002/LM76003 device is available in the WQFN
30-pin leadless package with wettable flanks.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM76002
LM76003
WQFN (30)
6.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
Efficiency vs Output Current
(VOUT = 5 V, fSW = 400 kHz, Auto Mode)
100
90
80
70
60
50
40
30
20
10
0
0.001
0.01 0.1
Load Current (A)
VIN = 8 V
VIN = 12 V
VIN = 13.5 V
VIN = 24 V
15
D034
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.



etcTI LM76003
LM76002, LM76003
SNVSAK0A – OCTOBER 2017 – REVISED OCTOBER 2019
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....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Timing Characteristics............................................... 8
6.7 Switching Characteristics .......................................... 8
6.8 System Characteristics ............................................. 9
6.9 Typical Characteristics ............................................ 10
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 22
8 Application and Implementation ........................ 24
8.1 Application Information............................................ 24
8.2 Typical Applications ............................................... 24
9 Power Supply Recommendations...................... 42
10 Layout................................................................... 42
10.1 Layout Guidelines ................................................. 42
10.2 Layout Example .................................................... 45
10.3 Thermal Design..................................................... 46
11 Device and Documentation Support ................. 47
11.1 Device Support...................................................... 47
11.2 Receiving Notification of Documentation Updates 47
11.3 Support Resources ............................................... 47
11.4 Trademarks ........................................................... 47
11.5 Electrostatic Discharge Caution ............................ 47
11.6 Glossary ................................................................ 47
12 Mechanical, Packaging, and Orderable
Information ........................................................... 47
4 Revision History
Changes from Original (October 2017) to Revision A
Page
• Updated the Thermal Information .......................................................................................................................................... 6
• Changed Figure 17............................................................................................................................................................... 18
• Changed "the PGOOD switch is turned off" to "the PGOOD switch is turned on" in the Power Good and Overvoltage
Protection (PGOOD) section ................................................................................................................................................ 20
2 Submit Documentation Feedback
Copyright © 2017–2019, Texas Instruments Incorporated
Product Folder Links: LM76002 LM76003



etcTI LM76003
www.ti.com
5 Pin Configuration and Functions
LM76002, LM76003
SNVSAK0A – OCTOBER 2017 – REVISED OCTOBER 2019
SW 1
SW 2
SW 3
SW 4
SW 5
BOOT 6
NC 7
VCC 8
BIAS 9
RT 10
SS/TRK 11
RNP Package
30-Pin WQFN
Top View
NC NC NC NC
30 29 28 27
26 PGND
25 PGND
24 PGND
23 NC
22 PVIN
DAP
21 PVIN
20 PVIN
19 NC
18 EN
17 SYNC/MODE
12 13 14 15
16 PGOOD
FB AGND AGND AGND
Copyright © 2017–2019, Texas Instruments Incorporated
Product Folder Links: LM76002 LM76003
Submit Documentation Feedback
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