LM2830XMFX/NOPB

The LM2830 regulator is a monolithic, highfrequency, 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 DCDC 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 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 highperformance 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.

Applications

• Local 5-V to Vcore Step-Down Converters
• Core Power in HDDs
• Set-Top Boxes
• USB Powered Devices
• DSL Modems
• Automotive

Key features

• 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