LMR14206XMK Datasheet, PDF (1/17 Pages) Texas Instruments – LMR14206 SIMPLE SWITCHER 42Vin, 0.6A Step-Down Voltage Regulator in SOT-23

LMR14206
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SNVS733D – OCTOBER 2011 – REVISED APRIL 2013
LMR14206 SIMPLE SWITCHER^® 42Vin, 0.6A Step-Down Voltage Regulator in SOT-23
Check for Samples: LMR14206
FEATURES
1
•2 Input Voltage Range of 4.5V to 42V
• Output Voltage Range of 0.765V to 34V
• Output Vurrent up to 0.6A
• 1.25 MHz Switching Frequency
• Low Shutdown Iq, 16 µA Typical
• Short Circuit Protected
• Internally Compensated
• Soft-Start Function
• Thin 6-Pin SOT Package (2.97 x 1.65 x 1mm)
• Fully Enabled for WEBENCH® Power Designer
PERFORMANCE BENEFITS
• Tight Accuracy for Powering Digital ICs
• Extremely Easy to Use
• Tiny Overall Solution Reduces System Cost
DESCRIPTION
The LMR14206 is a PWM DC/DC buck (step-down)
regulator. With a wide input range from 4.5V-42V,
they are suitable for a wide range of applications
such as power conditioning from unregulated
sources. They feature a low R_DSON (0.9Ω typical)
internal switch for maximum efficiency (85% typical).
Operating frequency is fixed at 1.25 MHz allowing the
use of small external components while still being
able to have low output voltage ripple. Soft-start can
be implemented using the shutdown pin with an
external RC circuit allowing the user to tailor the soft-
start time to a specific application.
The LMR14206 is optimized for up to 600 mA load
current with a 0.765V nominal feedback voltage.
Additional features include: thermal shutdown, V_IN
under-voltage lockout, and gate drive under-voltage
lockout. The LMR14206 is available in a low profile 6-
pin SOT package.
APPLICATIONS
• Point-of-Load Conversions from 5V, 12V, and
24V Rails
• Space Constrained Applications
• Battery Powered Equipment
• Industrial Distributed Power Applications
• Power Meters
• Portable Hand-Held Instruments
System Performance
Efficiency vs Load Current
V_IN = 12V, V_OUT = 1.2V and 3.3V
100
90
80
70
60
50
40
30
20
10
1.2Vout
3.3Vout
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT (A)
Efficiency vs Load Current
V_IN = 24V, V_OUT = 1.2V and 3.3V
100
90
80
70
60
50
40
30
20
10
1.2Vout
3.3Vout
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT (A)
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.
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