LMZ12008_16 Datasheet, PDF (1/35 Pages) Texas Instruments – SIMPLE SWITCHER Power Module

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LMZ12008
SNVS716H – MARCH 2011 – REVISED FEBRUARY 2016
LMZ12008 8-A SIMPLE SWITCHER^® Power Module With 20-V Maximum Input Voltage
1 Features
•1 Integrated Shielded Inductor
• Simple PCB Layout
• Fixed Switching Frequency (350kHz)
• Flexible Start-up 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
• Fully Enabled for WEBENCH^® Power Designer
• Pin Compatible With LMZ22010/08/06,
LMZ12010/06, LMZ23610/08/06, and
LMZ13610/08/06
• Electrical Specifications
– 40-W Maximum Total Output Power
– Up to 8-A Output Current
– Input Voltage Range 6 V to 20 V
– Output Voltage Range 0.8 V to 6 V
– Efficiency up to 92%
• Performance Benefits
– High Efficiency Reduces System Heat
Generation
– Low Radiated Emissions (EMI) Tested to
EN55022
NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B,
tested on Evaluation Board with EMI configuration
– Only 7 External Components
– Low Output Voltage Ripple
– No External Heat Sink Required
2 Applications
• Point-of-load Conversions from 12-V Input Rail
• Time-Critical Projects
• Space Constrained / High Thermal Requirement
Applications
• Negative Output Voltage Applications
See AN-2027 SNVA425.
3 Description
The LMZ12008 SIMPLE SWITCHER^® power module
is an easy-to-use step-down DC-DC solution capable
of driving up to 8-A load. The LMZ12008 is available
in an innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ12008 can accept an input voltage rail
between 6 V and 20 V and can deliver an adjustable
and highly accurate output voltage as low as 0.8 V.
The LMZ12008 only requires two external resistors
and external capacitors to complete the power
solution. The LMZ12008 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 the device allows start-up
into a prebiased output.
Device Information⁽¹⁾⁽²⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMZ12008
NDY (11)
15.00 mm × 15.00 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
Efficiency 3.3-V Output at 25°C
100
LMZ12008
90
VIN
VOUT
80
Enable
CIN
3 x 10 PF
CSS
0.47 PF
(OPT)
CFF 4.7 nF (OPT)
RFBT
See Table
RFBB
See Table
COUT
2 x 330 PF
70
60
50
40
0
6Vin
8Vin
10Vin
12Vin
16Vin
20Vin
2
4
6
8
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.