33730_10 Datasheet, PDF (1/26 Pages) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

Freescale Semiconductor
Advance Information
Document Number: MC33730
Rev. 6.0, 2/2010
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 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.
SWITCHING POWER SUPPLY
EK SUFFIX (PB-FREE)
98ARL10543D
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
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
Device
MCZ33730EK/R2
Temperature
Range (T_A)
- 40°C to 125°C
Package
32-SOICW-EP
• 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
• Pb-free packaging designated by suffix code EK
+
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 - 2010. All rights reserved.