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MC33998 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC33998 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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MOTOROLA SEMICONDUCTOR TECHNICAL DATA This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Motorola, Inc. 2003 33998 Simplified Application Diagram Document order number: MC33998/D Rev 1.0, 03/2003 33998 Advance Information Switching Power Supply with Linear Regulators The 33998 is a medium-power, multi-output power supply integrated circuit that is capable of operating over a wide input voltage range, from 6.0 V up to 26.5 V with 40 V transient capability. It incorporates a sensorless current mode control step-down switching controller regulating directly to 5.0 V. The 2.6 V linear regulator uses an external pass transistor to reduce the 33998 power dissipation. The 33998 also provides a 2.6 V linear standby regulator and two 5.0 V sensor supply outputs protected by internal low-resistance LDMOS transistors. There are two separate enable pins for the main and sensor supply outputs and standard supervisory functions such as resets with power-up reset delay. The 33998 provides proper power supply sequencing for advanced microprocessor architectures such as the Motorola MPC5xx and 683xx microprocessor families. Features • Operating Voltage Range 6.0 V up to 26.5 V (40 V transient) • Step-Down Switching Regulator Output VDDH = 5.0 V @ 1400 mA (total) • Linear Regulator with External Pass Transistor VDDL = 2.6 V @ 400 mA • Low-Power Standby Linear Regulator VKAM = 2.6 V @ 10 mA • Two 5.0 V @ 200 mA (typical) Sensor Supplies VREF Protected Against Short-to-Battery and Short-to-Ground with Retry Capability • Undervoltage Shutdown on the VDDL, VDDH Outputs with Retry Capability • Reset Signals • Power-Up Delay • Enable Pins for Main Supplies (EN) and Sensor Supplies (SNSEN) • Power Sequencing for Advanced Microprocessor Architectures • SOIC-24WB Package SNSEN VREF1 5.0 V VPWR KA_VPWR GND 33998 EN VSW VDDH DRVL FBL PWROK VKAM VKAMOK VREF2 5.0 V 5.0 V 2.6 V 2.6 V MCU VDDH VDDL VKAM ORDERING INFORMATION Device Temperature Range (TA) Package MC33998DW/R2 -40°C to 125°C 24 SOICW DW SUFFIX 24-LEAD SOICW CASE 751E POWER SUPPLY INTEGRATED CIRCUIT Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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