LP3995ILD-1.8/NOPB集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP3995ILD-1.8/NOPB属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的LP3995ILD-1.8/NOPB稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

1 Features

1• Input Range: 2.5 V to 6 V

• Accurate Output Voltage: ±75 mV / 2%

• Typical Dropout with 150 mA Load: 60 mV

• Virtually Zero Quiescent Current When Disabled

• Low Output Voltage Noise

• Stable With a 1-μF Output Capacitor

• Output Current: 150 mA

• Fast Turnon: 30 μs (Typical)

• Fast Turnoff: 175 μs (Typical)

• Stable With Ceramic Capacitor

• Logic Controlled Enable

• Fast Turnon

• Active Disable for Fast Turnoff

• Thermal-Overload and Short-Circuit Protection

• −40 to +125°C Junction Temperature Range for

Operation

2 Applications

• GSM Portable Phones

• CDMA Cellular Handsets

• Wideband CDMA Cellular Handsets

• Bluetooth Devices

• Portable Information Appliances

3 Description

The LP3995 linear regulator is designed to meet the

requirements of portable battery-powered applications, providing an accurate output voltage

with low noise and low quiescent current. Ideally

suited for powering RF and analog devices, this

device can also be used to meet more general circuit needs in which a fast turnoff is essential.

For battery-powered applications the low dropout and low ground current provided by the device allows the

lifetime of the battery to be maximized. The

Enable(/Disable) control function allows the system to

further extend the battery lifetime by reducing the

power consumption to virtually zero. This function

also incorporates an active discharge circuit on the

output for faster device shutdown. Where the fast

turnoff is not required the LP3999 linear regulator is

recommended. The LP3995 also features internal protection against short-circuit currents and

overtemperature conditions.

The LP3995 is designed to be stable with small 1-μF

ceramic capacitors. The small outline of the LP3995 DSBGA package with the required ceramic capacitors

can realize a system application within minimal board

area. Performance is specified for a −40°C to +125°C

temperature range.

The LP3995 is available in fixed output voltages from

1.5 V to 3.3 V, in DSBGA or WSON packages. For

other package options or output-voltage options,

contact your local TI sales office.