LM2830XMFSLASHNOPB中文资料德州仪器数据手册PDF规格书

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.