LM2832 Datasheet, PDF (1/34 Pages) National Semiconductor (TI) – High Frequency 2.0A Load - Step-Down DC-DC Regulator

LM2832
www.ti.com
SNVS455A – AUGUST 2006 – REVISED APRIL 2013
LM2832 High Frequency 2.0A Load - Step-Down DC-DC Regulator
Check for Samples: LM2832
FEATURES
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•2 Input Voltage Range of 3.0V to 5.5V
• Output Voltage Range of 0.6V to 4.5V
• 2.0A Output Current
• High Switching Frequencies
– 1.6MHz (LM2832X)
– 0.55MHz (LM2832Y)
– 3.0MHz (LM2832Z)
• 150mΩ 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
DESCRIPTION
The LM2832 regulator is a monolithic, high frequency,
PWM step-down DC/DC converter in a 6 Pin WSON
and a 8 Pin eMSOP-PowerPAD 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 LM2832 is
easy to use. The ability to drive 2.0A loads with an
internal 150 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 550 kHz, 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
LM2832 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.
Typical Application Circuit
EN
FB
R3
LM2832 ^GND
VIN
SW
L1
VIN = 5V
C1
D1
VO = 3.3V @ 2.0A
R1
C2
C3
R2
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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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