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TPS40040 Datasheet

Part Number TPS40040
Manufacturers Texas Instruments
Logo Texas Instruments
Description SYNCHRONOUS BUCK DC-TO-DC CONTROLLER
Datasheet TPS40040 DatasheetTPS40040 Datasheet (PDF)

TPS40040, TPS40041 www.ti.com SLUS700D – MARCH 2006 – REVISED DECEMBER 2007 LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH ENABLE FEATURES 1 •23 2.25-V to 5.5-V Input • Output Voltage from 0.6 V to 90% of VIN • High-Side Drive for N-Channel FET • Supports Pre-Biased Outputs • Adaptive Anti-Cross Conduction Gate Drive • 1%, 0.6-V Reference • Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz) • Three Selectable Short Circuit Pro.

  TPS40040   TPS40040






Part Number TPS40042
Manufacturers Texas Instruments
Logo Texas Instruments
Description SYNCHRONOUS BUCK DC-TO-DC CONTROLLER
Datasheet TPS40040 DatasheetTPS40042 Datasheet (PDF)

TPS40042 www.ti.com SLUS777 – NOVEMBER 2007 LOW PIN COUNT, LOW VIN (3.0 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH EXTERNAL REFERENCE INPUT FEATURES 1 •2 3.0-V to 5.5-V Input • External Reference required: 0.5 V to 1.5 V • Output Voltage from REFIN to 90% of VIN • High-Side Drive for N-Channel FET • Supports Pre-Biased Outputs • Adaptive Anti-Cross Conduction Gate Drive • Fixed switching frequency (600 kHz) Voltage Mode Control • Three Selectable Short Circuit Protection Levels • .

  TPS40040   TPS40040







Part Number TPS40041
Manufacturers Texas Instruments
Logo Texas Instruments
Description SYNCHRONOUS BUCK DC-TO-DC CONTROLLER
Datasheet TPS40040 DatasheetTPS40041 Datasheet (PDF)

TPS40040, TPS40041 www.ti.com SLUS700D – MARCH 2006 – REVISED DECEMBER 2007 LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH ENABLE FEATURES 1 •23 2.25-V to 5.5-V Input • Output Voltage from 0.6 V to 90% of VIN • High-Side Drive for N-Channel FET • Supports Pre-Biased Outputs • Adaptive Anti-Cross Conduction Gate Drive • 1%, 0.6-V Reference • Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz) • Three Selectable Short Circuit Pro.

  TPS40040   TPS40040







SYNCHRONOUS BUCK DC-TO-DC CONTROLLER

TPS40040, TPS40041 www.ti.com SLUS700D – MARCH 2006 – REVISED DECEMBER 2007 LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH ENABLE FEATURES 1 •23 2.25-V to 5.5-V Input • Output Voltage from 0.6 V to 90% of VIN • High-Side Drive for N-Channel FET • Supports Pre-Biased Outputs • Adaptive Anti-Cross Conduction Gate Drive • 1%, 0.6-V Reference • Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz) • Three Selectable Short Circuit Protection Levels of 105 mV, 180 mV and 310 mV • Hiccup Restart from Faults • Voltage Mode Control • Active Low Enable • Thermal Shutdown Protection at 145C • 8-Pin, 3-mm x 3-mm SON with Ground Connection to Thermal Pad APPLICATIONS • Point of Load • Telecommunications • DC to DC Modules • Set Top Boxes CONTENTS Device Ratings 2 Electrical Characteristics 3 Device Information 8 Application Information 10 Design Examples 19 Additional References 32 DESCRIPTION The TPS40040 and TPS40041 dc-to-dc controllers are designed to operate from a 2.25-V to 5.5-V input source. To reduce the number of external components, several operating parameters are fixed internally; namely, frequency, soft start time, and short circuit protection (SCP) levels. For example, the operating frequencies of TPS40040/1 are 300 kHz/600 kHz, respectively. SIMPLIFIED APPLICATION DIAGRAM VIN TPS40040/1 1 EN HDRV 8 2 FB SW 7 3 COMP BOOT 6 4 VDD GND LDRV 5 VOUT 1 Please be aware that an important no.


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