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MC33998 データシート(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC33998 データシート(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 20 page Document Number: MC33998 Rev. 2.0, 8/2006 Freescale Semiconductor Technical Data Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to permit improvements in the design of its products. © Freescale Semiconductor, Inc., 2007. All rights reserved. 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 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 • Pb-Free Packaging Designated by Suffix Code EG Figure 1. 33998 Simplified Application Diagram SWITCHING REGULATOR DW SUFFIX EG SUFFIX (PB-FREE) 98ASB42344B 24-PIN SOICW 33998 ORDERING INFORMATION Device Temperature Range (TA) Package MC33998DW/R2 -40°C to 125°C 24 SOICW MCZ33998EG/R2 5.0 V 33998 5.0 V 5.0 V 2.6 V 2.6 V MCU SNSEN VREF1 VPWR KA_VPWR GND EN VSW VDDH DRVL FBL PWROK VKAM VKAMOK VREF2 VDDH VKAM VDDL |
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同様の説明 - MC33998 |
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