REG103中文资料具有电源正常指示和使能功能的 500mA、15V、低压降稳压器数据手册TI规格书

描述 Description

The REG103 is a family of low-noise, low-dropout, linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions. The REG103 has very low output noise (typically 33µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The SO-8 version of the REG103 has an ERROR\\ pin that provides a power good flag, indicating the regulator is in regulation. The REG103 is well protected—internal circuitry provides a current limit that protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. In addition to the SO-8 package, the REG103 is also available in the DDPAK and the SOT223-5.

特性 Features

• NEW DMOS TOPOLOGY: Ultra Low Dropout Voltage: 115mV Typ at 500mA and 3.3V Output Output Capacitor NOT Required for Stability
• FAST TRANSIENT RESPONSE
• VERY LOW NOISE: 33µVrms
• HIGH ACCURACY: ±2% max
• HIGH EFFICIENCY: IGND = 1mA at IOUT = 500mA Not Enabled: IGND = 0.5µA
• 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS
• FOLDBACK CURRENT LIMIT
• THERMAL PROTECTION
• OUTPUT VOLTAGE ERROR INDICATOR
• SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5, SO-8
• APPLICATIONS
• PORTABLE COMMUNICATION DEVICES
• BATTERY-POWERED EQUIPMENT
• PERSONAL DIGITAL ASSISTANTS
• MODEMS
• BAR-CODE SCANNERS
• BACKUP POWER SUPPLIES

简介

REG103属于集成电路（IC）的线性+开关稳压器。由TI制造生产的REG103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。