CM2500GIS CHAMP [Champion Microelectronic Corp.], CM2500GIS Datasheet

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CM2500GIS

Manufacturer Part Number
CM2500GIS
Description
WIDE INPUT 2A STEP DOWN CONVERTER
Manufacturer
CHAMP [Champion Microelectronic Corp.]
Datasheet
GENERAL DESCRIPTION
The CM2500 is a current-mode step-down DC-DC converter
that generates up to 2A output current at 380kHz switching
frequency. The device utilizes advanced BCD process for
operation with input voltage up to 20V consuming only 20μA
in shutdown mode, the CM2500 is highly efficient with peak
efficiency at 95% when in operation.
Protection features include cycle-by-cycle current limit,
thermal shutdown, and frequency fold back at short circuit.
The CM2500 is available in SOP-8 package and requires
very few external devices for operation.
APPLICATIONS
TYPICAL APPLICATIONS
2008/04/15 Rev1.0
TFT LCD Monitors
Portable DVDs
Car-Powered or Battery-Powered Equipments
Set-Top Boxes
Telecom Power Supplies
DSL and Cable Modems and Routers
Termination Supplies
Champion Microelectronic Corporation
W
IDE
FEATURES
I
NPUT
2A Output Current
Up to 95% Efficiency
4.75V to 20V Input Range
20μA Shutdown Supply Current
380kHz Switching Frequency
Adjustable Output Voltage from 1.28V to 0.85·VIN
Cycle-by-Cycle Current Limit Protection
Thermal Shutdown Protection
Frequency Fold Back at Short Circuit
Stability with Wide Range of Capacitors,
SOP-8 Package
2A S
TEP
D
OWN
C
CM2500
ONVERTER
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CM2500GIS Summary of contents

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GENERAL DESCRIPTION The CM2500 is a current-mode step-down DC-DC converter that generates output current at 380kHz switching frequency. The device utilizes advanced BCD process for operation with input voltage up to 20V consuming only 20μA in shutdown ...

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PIN CONFIGURATION BLOCK DIAGRAM 2008/04/15 Rev1 IDE NPUT Champion Microelectronic Corporation CM2500 TEP OWN ONVERTER Page 2 ...

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... ORDERING INFORMATION Part Number CM2500GIS ABSOLUTE MAXIMUM RATINGS Input Voltage …………….……..……………… -0.3V to +25V Output Current …………………….…… Output Voltage ………………….…… GND-0. ESD Classification … ...

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ABSOLUTE MAXIMUM RATINGS (Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.) PARAMETER IN Supply Voltage SW Voltage BS Voltage EN, FB, COMP Voltage Continuous SW Current Junction ...

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ELECTRICAL CHARACTERISTICS (VIN = 12V, TA= 25°C unless otherwise specified.) PARAMETER Input Voltage Feedback Voltage High-Side Switch On Resistance Low-Side Switch On Resistance SW Leakage Current Limit COMP to Current Limit Transconductance Error Amplifier Transconductance Error Amplifier DC Gain Switching ...

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FUNCTIONAL DESCRIPTION As seen in Figure 2, Functional Block Diagram, the CM2500 is a current mode pulse width modulation (PWM) converter. The converter operates as follows : A switching cycle starts when the rising edge of the Oscillator clock output ...

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INPUT CAPACITOR The input capacitor needs to be carefully selected to maintain sufficiently low ripple at the supply input of the converter. A low ESR capacitor is highly recommended. Since large current flows in and out of this capacitor during ...

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STEP 2. Set the zero fZ1 at 1/4 of the crossover frequency. If RCOMP is less than 15kΩ, the equation for CCOMP is: If RCOMP is limited to 15kΩ, then the actual cross over frequency is 3.4 / (VOUTCOUT). Therefore: ...

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TYPICAL PERFORMANCE CHARACTERISTICS 2008/04/15 Rev1 IDE NPUT Champion Microelectronic Corporation CM2500 TEP OWN ONVERTER Page 9 ...

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PACKAGE DIMENSION 2008/04/15 Rev1 IDE NPUT SOP-8 Champion Microelectronic Corporation CM2500 TEP OWN ONVERTER Page 10 ...

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Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing ...

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