33730_12 Datasheet, PDF (1/28 Pages) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

Freescale Semiconductor
Advance Information
Document Number: MC33730
Rev. 9.0, 8/2012
Switch Mode Power Supply with
Multiple Linear Regulators
33730
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
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_DD3, V_DDL) and one standby regulator (V_KAM), or as one
Normal mode linear regulator (V_DDL) and two standby regulators (V_KAM
and V_DD3 Standby). Two protected outputs [VREF (1, 2)] are used to
provide power to external sensors.
Features
• Provides all regulated voltages for Freescale 32-bit
microcontroller family
• Adjustable frequency switching buck regulator with slew-rate
control
• Power sequencing provided
• Programmable voltages V_DDL, V_DD3 - 3% accuracy
• Programmable standby regulator V_KAM - 15% accuracy,
operating down to 4.5 V at the KA_VBAT pin
• V_DD3 can be programmed as an optional second standby
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
SWITCHING POWER SUPPLY
EK SUFFIX (PB-FREE)
98ARL10543D
32-LEAD SOICW-EP
ORDERING INFORMATION
Device
(Add R2 Suffix for
Tape and Reel)
Temperature
Range (T_A)
Package
MCZ33730EK
MC33730EK *
- 40 °C to 125 °C
32-SOICW-EP
* Recommended device for all new designs
+
5.0 V
33730
VBAT
+
BOOT
SW
PFD
KA_VBAT
VIGN
IGN_ON
VREF1,2
+
VDDH
INV
VCOMP
VDD3_B
VDD3
P1
P2
P3
CP
GND
HRT
VDDL_B
VDDL
VKAM
5.0V
RSTs
REGON
+
5.0 V
3.3 V
MCU
(32 Bit)
1.5 V
KA_1.0 V
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.