LMZ23605 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – Evaluation Board to be an easy-to-use platform to evaluate

LMZ23605
www.ti.com
SNVS659E – MARCH 2011 – REVISED AUGUST 2012
LMZ23605 5A SIMPLE SWITCHER® Power Module with 36V Maximum Input Voltage
Check for Samples: LMZ23605
KEY FEATURES
1
•23 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
• – 40°C to 125°C Junction Temperature Range
• 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/LMZ23603/LMZ22003
APPLICATIONS
• Point of Load Conversions from 12V and 24V
Input Rail
• Time Critical Projects
• Space Constrained / High Thermal
Requirement Applications
• Negative Output Voltage Applications See
SNVA425
PERFORMANCE BENEFITS
• High Efficiency Reduces System Heat
Generation
• Complies with EN55022 Class B ⁽¹⁾
• Low Component Count, Only 5 External
Components
• Low Output Voltage Ripple
• Uses PCB as Heat Sink, no Airflow Required
DESCRIPTION
The LMZ23605 SIMPLE SWITCHER^® power module
is an easy-to-use step-down DC-DC solution capable
of driving up to 5A load. The LMZ23605 is available
in an innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ23605 can accept an input voltage rail
between 6V and 36V and deliver an adjustable and
highly accurate output voltage as low as 0.8V. The
LMZ23605 only requires two external resistors and
three external capacitors to complete the power
solution. The LMZ23605 is a reliable and robust
design with the following protection features: thermal
shutdown, programmable input under-voltage lockout,
output over-voltage protection, short-circuit protection,
output current limit, and allows startup into a pre-
biased output. The sync input allows synchronization
over the 650 to 950 kHz switching frequency range.
ELECTRICAL SPECIFICATIONS
• 30W Maximum Total Output Power
• Up to 5A Output Current
• Input Voltage Range 6V to 36V
• Output Voltage Range 0.8V to 6V
• Efficiency up to 92%
Figure 1. PFM 7 Pin Package⁽²⁾
Easy To Use 7 Pin Package
RoHS Compliant
(1) EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007.
See SNVA473 and layout for information on device under
test. Vin = 24V Vo = 3.3V Io = 5A
(2) Theta JA measured on a 3.5” x 3.5” four layer board, with
three ounce copper on outer layers and two ounce copper on
inner layers, sixty 10 mil thermal vias, no air flow, and 1W
power dissipation. Refer to application note layout diagrams.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Webench, SIMPLE SWITCHER are registered trademarks of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated