Document Number: MC33730 Freescale Semiconductor Rev. 9.0, 8/2012 Advance Information Switch Mode Power Supply with 33730 Multiple Linear Regulators The 33730 is a multiple output power supply integrated circuit for automotive applications. The integrated circuit (IC) incorporates a switching regulator, which operates over a wide input voltage range SWITCHING POWER SUPPLY from 4.5 to 26.5 V. The step-down switching regulator uses a fixed frequency pulse- width modulation (PWM) voltage mode control. It has a 3.5 A current limit (typical) and the slew-rate is adjustable via a control pin to reduce switching noise. The switching regulator has an adjustable frequency oscillator, which allows the user to optimize its operation over a wide range of input voltages and component values. The linear regulators can be configured either as two Normal mode regulators (V , V ) and one standby regulator (V ), or as one DD3 DDL KAM Normal mode linear regulator (V ) and two standby regulators (V DDL KAM EK SUFFIX (PB-FREE) and V Standby). Two protected outputs VREF (1, 2) are used to DD3 98ARL10543D provide power to external sensors. 32-LEAD SOICW-EP Features Provides all regulated voltages for Freescale 32-bit microcontroller family ORDERING INFORMATION Adjustable frequency switching buck regulator with slew-rate Device Temperature control (Add R2 Suffix for Package Range (T ) A Power sequencing provided Tape and Reel) Programmable voltages V , V - 3% accuracy DDL DD3 MCZ33730EK Programmable standby regulator V - 15% accuracy, KAM - 40 C to 125 C 32-SOICW-EP operating down to 4.5 V at the KA VBAT pin MC33730EK * V can be programmed as an optional second standby DD3 * Recommended device for all new designs regulator with 15% accuracy Provides two 5.0 V protected supplies for sensors Provides reverse battery protection FET gate drive Provides necessary MCU monitoring and fail-safe support 33730 VBAT BOOT + + SW + PFD VDDH KA VBAT 5.0 V INV VIGN VCOMP VDD3 B IGN ON 3.3 V VDD3 VREF1,2 5.0 V MCU + (32 Bit) VDDL B P1 1.5 V VDDL P2 P3 CP VKAM KA 1.0 V 5.0V GND RSTs HRT REGON Figure 1. 33730 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. Freescale Semiconductor, Inc., 2009 - 2012. All rights reserved.DEVICE VARIATIONS DEVICE VARIATIONS Table 1. Device Variations Part no. Temperature Range Description MCZ33730EK Reset detect circuitry - 40 C to 125 C MC33730EK Improved VDDL and VDD3 reset detect circuitry 33730 Analog Integrated Circuit Device Data 2 Freescale Semiconductor