LMZ12001 Datasheet, PDF (1/27 Pages) National Semiconductor (TI) – 1A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage

LMZ12001
www.ti.com
SNVS651F – JANUARY 2010 – REVISED MARCH 2013
LMZ12001 1A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage
Check for Samples: LMZ12001
KEY FEATURES
1
•2 Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Startup Sequencing Using External
Soft-start Capacitor 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 FPGAs and
ASICs
• Low Output Voltage Ripple
• Pin-to-pin Compatible Family:
– LMZ14203/2/1 (42V max 3A, 2A, 1A)
– LMZ12003/2/1 (20V max 3A, 2A, 1A)
• Fully Webench® Power Designer Enabled
APPLICATIONS
• Point of Load Conversions from 5V and 12V
Input Rail
• Time Critical Projects
• Space Constrained High Thermal Requirement
Applications
• Negative Output Voltage Applications
(See AN-2027)
Figure 1. Easy To Use 7 Pin Package
PFM 7 Pin Package
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θ_JA = 20°C/W, θ_JC = 1.9°C/W
RoHS Compliant
ELECTRICAL SPECIFICATIONS
• 6W Maximum Total Power Output
• Up to 1A Output Current
• Input Voltage Range 4.5V to 20V
• Output Voltage Range 0.8V to 6V
• Efficiency up to 92%
PERFORMANCE BENEFITS
• Operates at High Ambient Temperature with
no Thermal Derating
• High Efficiency Reduces System Heat
Generation
• Low Radiated Emissions (EMI) Complies with
EN55022 Class B Standard
• Low External Component Count
DESCRIPTION
The LMZ12001 SIMPLE SWITCHER® power module
is an easy-to-use step-down DC-DC solution capable
of driving up to 1A load with exceptional power
conversion efficiency, line and load regulation, and
output accuracy. The LMZ12001 is available in an
innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ12001 can accept an input voltage rail
between 4.5V and 20V and deliver an adjustable and
highly accurate output voltage as low as 0.8V. The
LMZ12001 only requires three external resistors and
four external capacitors to complete the power
solution. The LMZ12001 is a reliable and robust
design with the following protection features: thermal
shutdown, input under-voltage lockout, output over-
voltage protection, short-circuit protection, output
current limit, and allows startup into a pre-biased
output. A single resistor adjusts the switching
frequency up to 1 MHz.
1
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2
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 © 2010–2013, Texas Instruments Incorporated