LM2984T/NOPB

LM2984 www.ti.com SNVS098C – APRIL 1998 – REVISED MARCH 2013 LM2984 Microprocessor Power Supply System Check for Samples: LM2984 FEATURES DESCRIPTION • • • • • • • • • • • • • • The LM2984 positive voltage regulator features three independent and tracking outputs capable of delivering the power for logic circuits, peripheral sensors and standby memory in a typical microprocessor system. The LM2984 includes circuitry which monitors both its own high-current output and also an external μP. If any error conditions are sensed in either, a reset error flag is set and maintained until the malfunction terminates. Since these functions are included in the same package with the three regulators, a great saving in board space can be realized in the typical microprocessor system. The LM2984 also features very low dropout voltages on each of its three regulator outputs (0.6V at the rated output current). Furthermore, the quiescent current can be reduced to 1 mA in the standby mode. 1 2 Three Low Dropout Tracking Regulators Output Current in Excess of 500 mA Fully Specified for −40°C to +125°C Operation Low Quiescent Current Standby Regulator Microprocessor Malfunction RESET Flag Delayed RESET on Power-Up Accurate pretrimmed 5V outputs Reverse Battery Protection Overvoltage Protection Reverse Transient Protection Short Circuit Protection Internal Thermal Overload Protection ON/OFF Switch for High Current Outputs P+ Product Enhancement Tested Designed also for vehicular applications, the LM2984 and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. Familiar regulator features such as short circuit and thermal overload protection are also provided. Fixed outputs of 5V are available in the plastic TO-220 power package. Typical Application Circuit COUT must be at least 10 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating temperature range as the regulator. The equivalent series resistance (ESR) of this capacitor is critical; see curves. Figure 1. Package Number NDJ0011B 1 2 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1998–2013, Texas Instruments Incorporated LM2984 SNVS098C – APRIL 1998 – REVISED MARCH 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Input Voltage Survival Voltage (