CONVERTER CONTROLLER. ML34063 Datasheet

ML34063 CONTROLLER. Datasheet pdf. Equivalent


Part ML34063
Description DC/DC CONVERTER CONTROLLER
Feature ML34063 DC/DC CONVERTER CONTROL CIRCUIT GENERAL DESCRIPTION The ML34063 is a monolithic control cir.
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Datasheet
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ML34063 DC/DC CONVERTER CONTROL CIRCUIT GENERAL DESCRIPTION ML34063 Datasheet
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ML34063
ML34063
DC/DC CONVERTER CONTROL CIRCUIT
GENERAL DESCRIPTION
The ML34063 is a monolithic control
circuit containing the primary functions required
for DC/DC converters. The device consists of an
internal temperature compensated reference,
comparator, controlled duty cycle oscillator with
an active current limit circuit, driver and high
current output switch. This device is specifically
designed to be incorporated in step-down,
step-up and voltage-inverting applications with a
minimum number of external components. The
±2% internal reference and low quiescent current
of 1.6mA are among the improvements of the
device over the competition
FEATURES
‹ 3V to 40V Input Voltage Operation.
‹ Internal 1.5A Peak Current Switch.
‹ Internal ±2% Reference.
‹ Low Quiescent Current .
‹ Frequency Operation Up to 100KHz.
‹ Low Dropout Operation: 100% Duty Cycle
‹ Current Limiting.
‹ Standard DIP8 and SOP8 Packages
Applications
‹ DC-DC Converter Module
‹ ADSL Modems
‹ Hub.
‹ Battery Chargers
Functional Diagram
Ver1.0
1



ML34063
Pin Description
ML34063
Symbol Pin NO.
Description
SC
SE
TC
GND
FB
1 1.5A switch collector
2 Darlington switch emitter
3 Oscillator timing capacitor
4 Power GND
5 Feedback comparator inverting input
VCC
6 Power supply input
IPK 7 Highside current sense input, VCC - VIPK=300mV
DRI 8 Drive collector
Ordering Information
ORDERI NG NUM BER
ML34063
ML34063A
PACKAGE
SOP8
DIP8
Absolute Maximum Ratings
Supply Voltage ……………….……………………. ………………………………… ……40V
Comparator Input Voltage Range ……………………….……..………………………-0.3V~40V
Switch Collector Voltage ………………………………………………………………. 40V
Switch Emitter Voltage …………………………………………………………………… 40V
Switch Collector to Emitter Voltage …………………………………………………….. .40V
Driver Collector Voltage …………………………………………………………………….40V
Switch Current………………………………………………………………………………..1.5A
Power Dissipation and Thermal Characteristics
DIP Package
Ta= 25°C…………………………………………………………..1.0W
Thermal Resistance ……………………………………...... 100°C /W
SO Package
Ta= 25°C ……………………………………………………625mW
Thermal Resistance ………………………………………...160°C /W
Operating Junction Temperature ………..…………………………………………………125°C
Operating Ambient Temperature Range ……...…………………………………….. 0°C~70°C
Storage Temperature Range ……………....……………………………………... - 65°C~150°C
Ver1.0
2







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