LMR33630 Datasheet, PDF (1/33 Pages) Texas Instruments – LMR33630 SIMPLE SWITCHER 3.8-V to 36-V, 3-A Synchronous Step-Down Voltage Converter

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LMR33630
SNVSAN3 – AUGUST 2017
LMR33630 SIMPLE SWITCHER^® 3.8-V to 36-V, 3-A Synchronous
Step-Down Voltage Converter
1 Features
•1 Input Voltage Range: 3.8 V to 36 V
• Output DC Current Range: 0 A to 3 A
• Output Voltage Range: 1 V to 24 V
• Integrated Synchronous Rectification
• Low Shutdown Quiescent Current of 6 µA
• Low Operating Quiescent Current of 25 µA
• Short Minimum On-time of 70 ns
• High Efficiency at Light Loads
• Peak Current Mode Controls
• Switching Frequency = 400 kHz
• Power-Good Flag for Sequencing, Fault
Reporting, and Output Voltage Monitoring
• Precision Enable to Program System UVLO
• Cycle-by-Cycle Current Limiting
• Operating Junction Temperature –40°C to +125°C
2 Applications
• Industrial Power Supplies
• Factory and Building Automation Systems
• General-Purpose Wide Input Voltage Regulation
V_IN
CIN
Simplified Schematic
VIN
EN
PGND
BOOT
SW
CBOOT
L1
V_OUT
COUT
CVCC
VCC
PG
FB
AGND
RFBT
RFBB
3 Description
The LMR33630 SIMPLE SWITCHER^® regulator is an
easy-to-use, synchronous, step-down DC-DC
converter capable of driving up to 3 A of load current
from an input of up to 36 V. The LMR33630 provides
exceptional efficiency and output accuracy in a very
small solution size. Peak-current-mode control is
employed. Additional features such as a power-good
flag and precision enable provide both flexible and
easy-to-use solutions for a wide range of applications.
The LMR33630 automatically folds back frequency at
light load to improve efficiency. The family requires
few external components and has a pinout designed
for simple PCB layout. Protection features include
thermal shutdown, input undervoltage lockout, cycle-
by-cycle current limit, and hiccup short-circuit
protection. The LMR33630 device is available in an
8-pin HSOIC package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMR33630
HSOIC (8)
6.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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space
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Efficiency vs Output Current
V_OUT = 5 V, 400 kHz, HSOIC
100
95
90
85
80
75
70
65
60
55
0.001
0.01
0.1
1
Output Current (A)
8V
12V
24V
36V
10
C009
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.