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參數(shù)資料
| 型號： | MC33998 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Switching Power Supply with Linear Regulators(帶線性穩(wěn)壓器的開關(guān)電源) |
| 中文描述： | 開關(guān)電源與線性穩(wěn)壓器（帶線性穩(wěn)壓器的開關(guān)電源） |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 437K |
| 代理商： | MC33998 |
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
Motorola, Inc. 2003
33998 Simplified Application Diagram
33998
Document order number: MC33998/D
Rev 1.0, 03/2003
33998
Advance Information
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 Motorola 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 V
DDH
= 5.0 V @ 1400 mA (total)
Linear Regulator with External Pass Transistor V
DDL
= 2.6 V @ 400 mA
Low-Power Standby Linear Regulator V
KAM
= 2.6 V @ 10 mA
Two 5.0 V @ 200 mA (typical) Sensor Supplies V
REF
Protected Against
Short-to-Battery and Short-to-Ground with Retry Capability
Undervoltage Shutdown on the V
DDL
, V
DDH
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
SOIC-24WB Package
SNSEN
VREF1
5.0 V
VPWR
KA_VPWR
GND
EN
VSW
VDDH
DRVL
FBL
PWROK
VKAMOK
VKAM
VREF2
5.0 V
5.0 V
2.6 V
2.6 V
MCU
VDDH
VDDL
VKAM
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MC33998DW/R2
-40°C to 125°C
24 SOICW
DW SUFFIX
24-LEAD SOICW
CASE 751E
POWER SUPPLY
INTEGRATED CIRCUIT
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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| MC3399DW | 制造商: 功能描述: 制造商:undefined 功能描述: |
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