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參數資料
| 型號： | PC33730EK/R2 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO32 |
| 封裝： | 0.65 MM PITCH, ROHS COMPLIANT, SOIC-32 |
| 文件頁數： | 1/27頁 |
| 文件大小： | 716K |
| 代理商： | PC33730EK/R2 |
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Document Number: MC33730
Rev. 3, 8/2008
Freescale Semiconductor
Product Preview
Freescale Semiconductor, Inc., 2007-8. All rights reserved.
*This document contains certain information on a product under development. Free-
scale reserves the right to change or discontinue this product without notice
Switch Mode Power Supply with
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
from +4.5V to +26.5V.
The step-down switching regulator uses a fixed frequency PWM
voltage mode control. It has a 3.5A 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 (VDD3, VDDL) and one standby regulator (VKAM), or as one
normal mode linear regulator (VDDL) and two standby regulators (VKAM
and VDD3 Standby). Two protected outputs [VREF (1, 2)] are used to
provide power to external sensors.
Features
Provides all regulated voltages for MPC5XX MCUs and other
MCUs logic and analog functions
Adjustable frequency switching buck regulator with slew-rate
control
Power sequencing provided
Programmable voltages VDDL, VDD3 - 3% accuracy
Programmable standby regulator VKAM - 15% accuracy,
operating down to 4.5V at KA_VBAT pin
VDD3 can be programmed as an optional second standby regulator with 15% accuracy
Provides two 5.0V 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
Figure 1. 33730 Simplified Application Diagram
SWITCHING POWER SUPPLY
EK SUFFIX (PB-FREE)
98ARL10543D
32-LEAD SOICW-EP
33730
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
PC33730EK/R2
-40°C to 125°C
32-SOICW-EP
VBAT
KA_VBAT
VIGN
VREF1,2
GND
HRT
BOOT
SW
VDDH
VCOMP
VDD3_B
VDD3
VDDL
VKAM
RSTs
+
5.0 V
+
INV
VDDL_B
5.0V
KA_1.0V
1.5V
MCU
(MPC5XXX)
3.3V
33730
P1
P2
PFD
P3
REGON
IGN_ON
CP
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