MIC29710/29712 7.5A Fast-Response LDO Regulator General Description Features The MIC29710 and MIC29712 are high-current, high-accu- Fast transient response racy, low-dropout voltage regulators featuring fast transient 7.5A current capability recovery from input voltage surges and output load current 700mV dropout voltage at full load changes. These regulators use a PNP pass element that Low ground current features Micrels proprietary Super eta PNP process. Accurate 2% guaranteed tolerance The MIC29710 is available in the 3-pin fixed output and Zero current shutdown mode (MIC29712) the MIC29712 is available in the 5-pin adjustable output voltage. Both versions are fully protected against Fixed voltage and adjustable versions overcurrent faults, reversed lead insertion, over- temperature operation, and positive and negative transient Applications voltage spikes. Pentium , Pentium Plus, and Power PC processor A TTL compatible enable (EN) control pin supports supplies external on/off control. If on/off control is not required, the High-efficiency green computer systems device maybe continuously enabled by connecting EN to High-efficiency linear power supplies IN. High-efficiency switching supply post regulator The MIC29710 is available in the standard 3-pin TO-220 package the MIC29712 is available in the 5-pin TO-220 Battery-powered equipment package with an operating junction temperature range of 0C to +125C. For applications requiring even lower dropout voltage or input voltage greater than 16V, see the MIC29750/29752. Data sheets and support documentation can be found on Micrels web site at www.micrel.com. Typical Application R1 V = 1.240 + 1 OUT R2 Fixed Regulator Configuration Adjustable Regulator Configuration Super eta PNP is a registered trademark of Micrel, Inc. Pentium is a registered trademark of Intel Corporation. PowerPC is a registered trademark of IBM Corporation. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC29710/29712 (1) Ordering Information Part Number Junction Voltage Package Temp. Range Standard RoHS Compliant* MIC29710-3.3BT MIC29710-3.3WT 3.3V 0C to +125C 3-Pin TO-220 MIC29710-5.0BT MIC29710-5.0WT 5.0V 0C to +125C 3-Pin TO-220 MIC29712BT MIC29712WT Adj 0C to +125C 5-Pin TO-220 Note: * RoHS Compliant with high-melting solder exemption. Pin Configuration 12 345 1 2 3 MIC29710BT/WT MIC29712BT/WT On both devices, the Tab is grounded Pin Description Pin Number Pin Number Pin Name Pin Name 3-Pin TO-220 5-Pin TO-220 1 EN Enable (Input): Logic-level ON/OFF control. 1 2 IN Unregulated Input: +16V maximum supply. 2 3 GND Ground: Internally connected to tab (ground). 3 4 OUT Regulated Output 5 ADJ Output Voltage Adjust: 1.240V feedback from external resistive divider. M9999-101906 October 2006 2