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REG101UA-5 Datasheet(PDF) 1 Page - Texas Instruments |
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REG101UA-5 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page DMOS 100mA Low-Dropout Regulator FEATURES q NEW DMOS TOPOLOGY: Ultra Low Dropout Voltage: 60mV typ at 100mA Output capacitor NOT required for stability q FAST TRANSIENT RESPONSE q VERY LOW NOISE: 23 µVrms q HIGH ACCURACY: ±1.5% max q HIGH EFFICIENCY: IGND = 500µA at IOUT = 100mA Not Enabled: IGND = 10nA q 2.5V, 2.8V, 2.85V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS q OTHER OUTPUT VOLTAGES AVAILABLE UPON REQUEST q FOLDBACK CURRENT LIMIT q THERMAL PROTECTION q SMALL SURFACE-MOUNT PACKAGES: SOT23-5 and SO-8 APPLICATIONS q PORTABLE COMMUNICATION DEVICES q BATTERY-POWERED EQUIPMENT q PERSONAL DIGITAL ASSISTANTS q MODEMS q BAR-CODE SCANNERS q BACKUP POWER SUPPLIES DESCRIPTION The REG101 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 60mV 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 1 µF. Typical ground pin current is only 500 µA (at I OUT = 100mA) and drops to 10nA when not in enabled mode. Unlike regula- tors with PNP pass devices, quiescent current remains rela- tively constant over load variation and under dropout condi- tions. The REG101 has very low output noise (typically 23 µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. Accuracy is main- tained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40 °C to +85°C). The REG101 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. The REG101 is available in the SOT23-5 and the SO-8 packages. REG101 (Fixed Voltage Versions) Enable Gnd 0.1 µF C OUT (1) + + V OUT V IN NR NR = Noise Reduction NOTE: (1) Optional. REG101-A Gnd Enable 0.1 µF + C OUT (1) + V OUT V IN R 2 R 1 Adj REG101 REG101 SBVS026D – JULY 2001 – REVISED SEPTEMBER 2005 www.ti.com PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2000-2005, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. |
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