LM2830_15 Datasheet, PDF (1/37 Pages) Texas Instruments – LM2830/-Q1 High-Frequency 1.0-A Load Step-Down DC-DC Regulator

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LM2830, LM2830-Q1
SNVS454E – AUGUST 2006 – REVISED DECEMBER 2014
LM2830/-Q1 High-Frequency 1.0-A Load Step-Down DC-DC Regulator
1 Features
•1 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 3.0 V to 5.5 V
• Output Voltage Range of 0.6 V to 4.5 V
• 1.0-A Output Current
• High Switching Frequencies
– 1.6 MHz (LM2830X)
– 3.0 MHz (LM2830Z)
• 130-mΩ PMOS Switch
• 0.6-V, 2% Internal Voltage Reference
• Internal Soft-Start
• Current Mode, PWM Operation
• Thermal Shutdown
• Overvoltage Protection
2 Applications
• Local 5-V to Vcore Step-Down Converters
• Core Power in HDDs
• Set-Top Boxes
• USB Powered Devices
• DSL Modems
• Automotive
3 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. The device
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 regulator is easy to use. The ability to drive
1.0-A 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 30
ns, thus supporting exceptionally high frequency
conversion over the entire 3-V to 5.5-V input
operating range down to the minimum output voltage
of 0.6 V. 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 standby current of 30
nA. The LM2830 regulator uses 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 overvoltage protection.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM2830
SOT (5)
WSON (6)
2.90 mm × 1.60 mm
3.00 mm × 3.00 mm
LM2830-Q1
SOT (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
R3
VIN = 5V
C1
Typical Application Circuit
EN
FB
LM2830 ^GND
L1
VIN
SW
VO = 3.3V @ 1.0A
R1
D1
C2
C3
R2
Efficiency vs Load Current
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.