LM2830 Datasheet, PDF (1/33 Pages) National Semiconductor (TI) – High Frequency 1.0A Load - Step-Down DC-DC Regulator

LM2830
www.ti.com
SNVS454D – AUGUST 2006 – REVISED APRIL 2013
LM2830 High Frequency 1.0A Load - Step-Down DC-DC Regulator
Check for Samples: LM2830
FEATURES
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•2 LM2830Z-Q1 and LM2830X-Q1 in the SOT-23
Package are Automotive Grade Products that
are AEC-Q100 Grade 1 Qualified (-40°C to
+125°C Operating Junction Temperature)
• Space Saving SOT-23 Package
• Input Voltage Range of 3.0V to 5.5V
• Output Voltage Range of 0.6V to 4.5V
• 1.0A Output Current
• High Switching Frequencies
– 1.6MHz (LM2830X)
– 3.0MHz (LM2830Z)
• 130mΩ PMOS Switch
• 0.6V, 2% Internal Voltage Reference
• Internal Soft-Start
• Current Mode, PWM Operation
• Thermal Shutdown
• Over Voltage Protection
APPLICATIONS
• Local 5V to Vcore Step-Down Converters
• Core Power in HDDs
• Set-Top Boxes
• USB Powered Devices
• DSL Modems
• Automotive
DESCRIPTION
The LM2830 regulator is a monolithic, high frequency,
PWM step-down DC/DC converter in a 5 pin SOT-23
and a 6 Pin WSON package. It provides 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 LM2830 is easy to use. The
ability to drive 1.0A loads with an internal 130 mΩ
PMOS switch using state-of-the-art 0.5 µm BiCMOS
technology results in the best power density
available. The world-class 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 1.6 MHz, or 3.0 MHz, allowing the use of extremely
small surface mount inductors and chip 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 30 nA. The LM2830 utilizes 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,
pulse-by-pulse current limit, thermal shutdown, and
output over-voltage protection.
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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