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TEA1206 Dataheets PDF



Part Number TEA1206
Manufacturers NXP
Logo NXP
Description High efficiency DC/DC converter
Datasheet TEA1206 DatasheetTEA1206 Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET TEA1206T High efficiency DC/DC converter Preliminary specification Supersedes data of 1998 Mar 24 File under Integrated Circuits, IC03 1999 Sep 16 Philips Semiconductors Preliminary specification High efficiency DC/DC converter FEATURES • Fully integrated DC/DC converter circuit • Up-or-down conversion • Start-up from 1.8 V input • Adjustable output voltage • High efficiency over large load range • Power handling capability up to 1 A continuous average current • .

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INTEGRATED CIRCUITS DATA SHEET TEA1206T High efficiency DC/DC converter Preliminary specification Supersedes data of 1998 Mar 24 File under Integrated Circuits, IC03 1999 Sep 16 Philips Semiconductors Preliminary specification High efficiency DC/DC converter FEATURES • Fully integrated DC/DC converter circuit • Up-or-down conversion • Start-up from 1.8 V input • Adjustable output voltage • High efficiency over large load range • Power handling capability up to 1 A continuous average current • 600 kHz switching frequency • Low quiescent power consumption • Synchronizes to external 9 to 20 MHz clock • True current limit for Li-ion battery compatibility • Up to 100% duty cycle in down mode • Undervoltage lockout • Shut-down function • 8-pin SO package. APPLICATIONS TEA1206T • Cellular and cordless phones, PDAs and others • Supply voltage source for low-voltage chip sets • Portable computers • Battery backup supplies • Cameras. GENERAL DESCRIPTION The TEA1206T (see Fig.1) is a fully integrated DC/DC converter circuit. Efficient, compact and dynamic power conversion is achieved using a novel, digitally controlled Pulse Width and Frequency Modulation (PWFM) like control concept, integrated low RdsON CMOS power switches with low parasitic capacitances, and fully synchronous rectification. The device operates at a high 590 kHz switching frequency which enables the use of minimum size external components. Deadlock is prevented by an on-chip undervoltage lockout circuit. Compatibility with Li-ion batteries is guaranteed by an accurate current limit function. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1206T SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm VERSION SOT96-1 1999 Sep 16 2 Philips Semiconductors Preliminary specification High efficiency DC/DC converter QUICK REFERENCE DATA SYMBOL Voltage levels VO(up) VO(down) Vi(up) Vi(down) Vstart Vfb Iq Ishdwn IlimN IlimP ILx RdsON(N) RdsON(P) η output voltage range in up mode output voltage range in down mode input voltage range in up mode input voltage range in down mode start-up voltage feedback voltage level U/D = LOW U/D = HIGH U/D = LOW U/D = HIGH up mode; IL < 200 mA 2.80 1.25 Vstart 2.80 1.40 1.19 − − − − 1.60 1.24 PARAMETER CONDITIONS MIN. TYP. TEA1206T MAX. UNIT 5.50 5.50 5.50 5.50 1.85 1.29 V V V V V V µA µA A A A Ω Ω Current levels quiescent current at pin 3 shut-down current current limit NFET current limit PFET maximum continuous current at pin 4 up mode; note 1 down mode; note 1 down mode, Vi = 3.6 V 65 − 0.5 0.5 − 0.08 0.10 Vi = 3.6 V; L = 10 µH IL = 1 mA IL = 10 mA IL = 50 mA IL = 100 mA IL = 500 mA IL = 1000 mA; pulsed load current Vi = 3.6 down to 1.8 V IL = 1 mA IL = 10 mA IL = 50 mA IL = 100 mA IL = 500 mA IL = 1000 mA; pulsed load current Timing fsw fsync tres Note 1. Current limit is defined by an external resistor Rlim, having 1% accuracy. The typical value is presettable between 0.5 and 5.0 A with a spread of ±17.5%. 1999 Sep 16 3 switching frequency sync input frequency response time from standby to Pmax PWM mode 475 9 − 560 13 25 645 20 − kHz MHz µs − − − − − − − − − − − − − 75 2 − − − 0.14 0.16 − 86 93 93 93 93 87 83 90 91 87 88 82 85 10 5.0 5.0 1.0 Power MOSFETS pin-to-pin resistance NFET pin-to-pin resistance PFET 0.20 0.25 − − − − − − − − − − − − − % % % % % % % % % % % % Efficiency; see Fig.5 efficiency Vi = 3.6 up to 4.6 V This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... 1999 Sep 16 LX 4 I/V CONVERTER ILIM 2 START-UP CIRCUIT I/V CONVERTER N-type POWER FET CURRENT LIMIT COMPARATORS BLOCK DIAGRAM Philips Semiconductors P-type POWER FET handbook, full pagewidth High efficiency DC/DC converter 3 UPOUT/DNIN sense FET INTERNAL SUPPLY TEA1206T CONTROL LOGIC AND MODE GEARBOX 7 FB 4 6 GND TEMPERATURE PROTECTION sense FET 13 MHz OSCILLATOR SYNC GATE TIME COUNTER DIGITAL CONTROLLER BAND GAP REFERENCE 5 8 1 MGM666 SYNC SHDN U/D Preliminary specification TEA1206T Fig.1 Block diagram. Philips Semiconductors Preliminary specification High efficiency DC/DC converter PINNING SYMBOL U/D ILIM UPOUT/DNIN LX SYNC GND FB SHDWN PIN 1 2 3 4 5 6 7 8 DESCRIPTION conversion mode selection input current limit resistor connection up mode; output voltage/ down mode; input voltage inductor connection synchronization clock input MGM667 TEA1206T handbook, halfpage U/D 1 ILIM 2 8 7 SHDWN FB GND SYNC TEA1206T UPOUT/DNIN 3 LX 4 6 5 ground feedback input shut-down input cycle. As soon as more load current is taken from the output the output voltage starts to decay. When the output voltage becomes lower than.


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