LMZ23603 Datasheet, PDF (1/34 Pages) Texas Instruments – 3A SIMPLE SWITCHER Power Module

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LMZ23603
SNVS711J – MARCH 2011 – REVISED AUGUST 2015
LMZ23603 3-A SIMPLE SWITCHER^® Power Module With 36-V Maximum Input Voltage
1 Features
• Integrated Shielded Inductor
• Simple PCB Layout
• Frequency Synchronization Input (650 kHz to 950
kHz)
• Flexible Startup Sequencing Using External Soft-
start, Tracking and Precision Enable
• Protection Against Inrush Currents and Faults
Such as Input UVLO and Output Short Circuit
• Junction Temperature Range –40°C to 125°C
• Single Exposed Pad and Standard Pinout for Easy
Mounting and Manufacturing
• Fast Transient Response for Powering FPGAs
and ASICs
• Fully Enabled for WEBENCH^® Power Designer
• Pin Compatible With
LMZ22005/LMZ23605/LMZ22003
• Performance Benefits
– High Efficiency Reduces System Heat
Generation
– Tested to EN55022 Class B
– See AN-2125 (SNVA473) and layout for
information on device under test.
– V_IN = 24 V, V_O = 3.3 V, I_O = 3 A
NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007.
– Low component count, only 5 external
components
– Low output voltage ripple
– Uses PCB as heat sink, no airflow required
• Electrical Specifications
– 18-W maximum total output power
– Up to 3-A output current
– Input voltage range 6 V to 36 V
– Output voltage range 0.8 V to 6 V
– Efficiency up to 92%
1
2 Applications
• Point-of-load Conversions from 12-V and 24-V
Input Rail
• Time-Critical Projects
• Space Constrained and High Thermal
Requirement Applications
• Negative Output Voltage Applications (See AN-
2027, SNVA425)
3 Description
The LMZ23603 SIMPLE SWITCHER^® power module
is an easy-to-use step-down DC-DC solution capable
of driving up to 3-A load. The LMZ23603 is available
in an innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ23603 can accept an input voltage rail
between 6 V and 36 V and deliver an adjustable and
highly accurate output voltage as low as 0.8 V. The
LMZ23603 only requires two external resistors and
three external capacitors to complete the power
solution. The LMZ23603 is a reliable and robust
design with the following protection features: thermal
shutdown, programmable input undervoltage lockout,
output overvoltage protection, short circuit protection,
output current limit, and allows start-up into a
prebiased output. The sync input allows
synchronization over the 650-kHz to 950-kHz
switching frequency range.
Device Information⁽¹⁾⁽²⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMZ23603
NDW (7)
10.16 mm × 9.85 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) Peak reflow temperature equals 245°C. See SNAA214 for
more details.
Simplified Application Schematic
LMZ23603
VIN
Enable
CIN
22 2F
CSS
0.47 2F
RFBT
See Table
RFBB
See Table
VOUT @ 3A
Co
220 2F
Efficiency 5-V Output at 25°C Ambient
100
90
80
70
60
50
40
0
9 VIn
12 Vin
20 Vin
24 Vin
30 Vin
36 Vin
1
2
3
OUTPUT CURRENT (A)
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.