REG104中文资料具有使能功能的 1A、15V、低压降稳压器数据手册TI规格书

描述 Description

The REG104 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 230mV 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 1.7mA (at IOUT = 1A) 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 REG104 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 REG104 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG104 is available in the DDPAK-5 and the SOT223-5.

特性 Features

• NEW DMOS TOPOLOGY: Ultra Low Dropout Voltage: 230mV typ at 1A and 3.3V Output Output Capacitor NOT Required for Stability
• FAST TRANSIENT RESPONSE
• VERY LOW NOISE: 33µVRMS
• HIGH ACCURACY: ±2% max
• HIGH EFFICIENCY: IGND = 1.7mA at IOUT = 1A Not Enabled: IGND = 0.5µA
• 2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND ADJUSTABLE OUTPUT VERSIONS
• THERMAL PROTECTION
• SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5
• APPLICATIONS
• PORTABLE COMMUNICATION DEVICES
• BATTERY-POWERED EQUIPMENT
• MODEMS
• BAR-CODE SCANNERS
• BACKUP POWER SUPPLIES

简介

REG104属于集成电路（IC）的线性+开关稳压器。由TI制造生产的REG104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。