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MC33166

更新时间： 2024-09-28 22:54:59
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 稳压器开关电源开关
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16页 406K
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POWER SWITCHING REGULATORS

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Order this document by MC34166/D  
The MC34166, MC33166 series are high performance fixed frequency  
power switching regulators that contain the primary functions required for  
dc–to–dc converters. This series was specifically designed to be  
incorporated in step–down and voltage–inverting configurations with a  
minimum number of external components and can also be used cost  
effectively in step–up applications.  
These devices consist of an internal temperature compensated  
reference, fixed frequency oscillator with on–chip timing components,  
latching pulse width modulator for single pulse metering, high gain error  
amplifier, and a high current output switch.  
POWER SWITCHING  
REGULATORS  
SEMICONDUCTOR  
TECHNICAL DATA  
Protective features consist of cycle–by–cycle current limiting,  
undervoltage lockout, and thermal shutdown. Also included is a low power  
standby mode that reduces power supply current to 36 µA.  
TH SUFFIX  
PLASTIC PACKAGE  
CASE 314A  
• Output Switch Current in Excess of 3.0 A  
• Fixed Frequency Oscillator (72 kHz) with On–Chip Timing  
• Provides 5.05 V Output without External Resistor Divider  
• Precision 2% Reference  
• 0% to 95% Output Duty Cycle  
• Cycle–by–Cycle Current Limiting  
1
5
1
TV SUFFIX  
PLASTIC PACKAGE  
5
CASE 314B  
• Undervoltage Lockout with Hysteresis  
• Internal Thermal Shutdown  
Heatsink surface connected to Pin 3.  
• Operation from 7.5 V to 40 V  
• Standby Mode Reduces Power Supply Current to 36 µA  
• Economical 5–Lead TO–220 Package with Two Optional Leadforms  
T SUFFIX  
PLASTIC PACKAGE  
CASE 314D  
1
2
• Also Available in Surface Mount D PAK Package  
5
Pin 1. Voltage Feedback Input  
2. Switch Output  
3. Ground  
4. Input Voltage/V  
5. Compensation/Standby  
CC  
Simplified Block Diagram  
(Step Down Application)  
V
in  
D2T SUFFIX  
4
2
PLASTIC PACKAGE  
CASE 936A  
I
LIMIT  
2
1
(D PAK)  
Oscillator  
5
S
R
Heatsink surface (shown as terminal 6  
in case outline drawing) is connected to Pin 3.  
Q
PWM  
ORDERING INFORMATION  
Operating  
UVLO  
Thermal  
L
Temperature Range  
Device  
Package  
Surface Mount  
Straight Lead  
Horiz. Mount  
Vertical Mount  
Surface Mount  
Straight Lead  
Horiz. Mount  
Vertical Mount  
Reference  
MC33166D2T  
MC33166T  
T
A
= – 40° to + 85°C  
EA  
MC33166TH  
MC33166TV  
MC34166D2T  
MC34166T  
1
V
O
5.05 V/3.0 A  
T
= 0° to + 70°C  
A
3
5
MC34166TH  
MC34166TV  
This device contains 143 active transistors.  
Motorola, Inc. 1996  
Rev 4  
1234567...16

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