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 world–
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.