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REG103GA-3 Datasheet(PDF) 1 Page - Burr-Brown (TI) |
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REG103GA-3 Datasheet(HTML) 1 Page - Burr-Brown (TI) |
1 / 19 page DMOS 500mA Low-Dropout Regulator FEATURES q NEW DMOS TOPOLOGY: Ultra Low Dropout Voltage: 115mV Typ at 500mA and 3.3V Output Output Capacitor NOT Required for Stability q FAST TRANSIENT RESPONSE q VERY LOW NOISE: 33 µVrms q HIGH ACCURACY: ±2% max q HIGH EFFICIENCY: IGND = 1mA at IOUT = 500mA Not Enabled: IGND = 0.5µA q 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS q FOLDBACK CURRENT LIMIT q THERMAL PROTECTION q OUTPUT VOLTAGE ERROR INDICATOR(1) q SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5, 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 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 1 µF. Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5 µA 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 33 µVrms 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 main- tained 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 cir- cuitry 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. REG103 (Fixed Voltage Versions) ENABLE Gnd 0.1 µF C OUT (2) + + V OUT V IN NR NR = Noise Reduction NOTE: (1) SO-8 Package Only. (2) Optional. ERROR(1) ERROR1) REG103-A Gnd ENABLE 0.1 µF + C OUT (2) + V OUT V IN R 2 R 1 Adj REG103 REG1 03 REG1 03 REG103 SBVS010B – JANUARY 2000 – REVISED FEBRUARY 2004 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 © 2000-2004, 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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