LMR10530_15 Datasheet, PDF (1/31 Pages) Texas Instruments – SIMPLE SWITCHER 5.5Vin, 3.0A Step-Down Voltage Regulator in WSON-10

LMR10530
www.ti.com
SNVS814A – JUNE 2012 – REVISED APRIL 2013
LMR10530 SIMPLE SWITCHER^® 5.5Vin, 3.0A Step-Down Voltage Regulator in WSON-10
Check for Samples: LMR10530
FEATURES
1
•23 Input Voltage Range of 3.0V to 5.5V
• Output Voltage Range of 0.6V to 4.5V
• 1.5 MHz (LMR10530X) and 3 MHz (LMR10530Y)
Switching Frequencies
• WSON-10 (3 x 3 x 0.8 mm) Packaging
• 3.0A Steady-State Output Current
• Low Shutdown Iq, 300 nA Typical
• 56mΩ PMOS Switch
• Internal Soft-Start
• Internally Compensated Peak Current-Mode
Control
• Cycle-by-cycle Current Limit and Thermal
Shutdown
• WEBENCH^® enabled
PERFORMANCE BENEFITS
• Extremely Easy to Use
• Tiny Overall Solution Reduces System Cost
APPLICATIONS
• Point-of-load Conversions from 3.3V and 5V
Rails
• Space Constrained Applications
DESCRIPTION
The LMR10530 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter
available in a 10-pin WSON package. It contains all
the active functions to provide local DC/DC
conversion with fast transient response and accurate
regulation in the smallest possible PCB area. With a
minimum of external components, the LMR10530 is
easy to use. The ability to drive 3.0A loads with an
internal 56 mΩ PMOS switch using state-of-the-art
0.5µm BiCMOS technology results in the best power
density available. The control circuitry allows on-times
as low as 30ns, thus supporting exceptionally high
frequency conversion over the entire 3V to 5.5V input
operating range down to the minimum output voltage
of 0.6V. Switching frequency is internally set to
1.5MHz or 3.0MHz, allowing the use of extremely
small surface mount inductors and capacitors. Even
though the operating frequency is high, efficiencies
up to 93% are easy to achieve. External shutdown is
included, featuring an ultra-low stand-by current of
300nA. The LMR10530 utilizes peak current-mode
control and internal compensation to provide high-
performance regulation over a wide range of
operating conditions. Additional features include
internal soft-start circuitry to reduce inrush current,
cycle-by-cycle current limit, frequency foldback,
thermal shutdown, and output over-voltage
protection.
System Performance
Efficiency vs Load Current
LMR10530X V_IN = 5V
Efficiency vs Load Current
LMR10530Y V_IN = 5V
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.
SIMPLE SWITCHER, WEBENCH 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 © 2012–2013, Texas Instruments Incorporated