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Details, datasheet, quote on part number:TPS40051PWP
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Datasheet text preview:
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TPS40050 TPS40051 TPS40053
SLUS540E - DECEMBER 2002 - REVISED APRIL 2004
WIDE INPUT SYNCHRONOUS BUCK CONTROLLER
FEATURES D Operating Input Voltage 8 V to 40 V D Input Voltage Feed-Forward Compensation D < 1 % Internal 0.7-V Reference D Programmable Fixed-Frequency Up to 1 MHz D D D D D D D D D
Voltage Mode Controller Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs 16-Pin PowerPADt Package (JC = 2°C/W) Thermal Shutdown Externally Synchronizable Programmable High-Side Current Limit Programmable Closed-Loop Soft-Start TPS40050 Source Only TPS40051 Source/Sink TPS40053 Source/Sink With VOUT Prebias
DESCRIPTION
The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS4005x family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feedforward, high-side current limit, and loop compensation. The TPS4005x are also synchronizable to an external supply. They incorporate MOSFET gate drivers for external N-channel high-side and synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction. The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients with near constant gain with input variation which eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads.
APPLICATIONS D Power Modules D Networking/Telecom D Industrial D Servers SIMPLIFIED APPLICATION
1 VIN 2 3 4 5 6 7 8 TPS40050PWP KFF ILIM RT BP5 SYNC SGND SS/SD VFB COMP VIN BOOST HDRV SW BP10 LDRV PGND 16 15 14 13 12
+ 11 10 9 VOUT -
UDG-02130
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPADt is trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2002, 2004, Texas Instruments Incorporated
TPS40050 TPS40051 TPS40053
SLUS540E - DECEMBER 2002 - REVISED APRIL 2004
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
TA - 40°C to 85°C 85 C APPLICATION SOURCE(2) SOURCE/SINK(2) SOURCE/SINK(2) with prebias PACKAGE Plastic HTSSOP (PWP)(1) Plastic HTSSOP (PWP)(1) Plastic HTSSOP (PWP)(1) PART NUMBER TPS40050PWP TPS40051PWP TPS40053PWP
(1) The PWP package is also available taped and reeled. Add an R suffix to the device type (i.e., TPS40050PWPR). See the application section of the data sheet for PowerPAD drawing and layout information. (2) See Application Information section, pg. 7
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(3) TPS40050 TPS40051 TPS40053 VIN VFB, SS, SYNC Input voltage range, VIN SW SW, transient < 50 ns KFF, with IIN(max) = -5 mA Output voltage range, VOUT Input current, IIN Output current, IOUT Operating junction temperature range, TJ Storage temperature, Tstg COMP, RT, SS KFF RT 45 -0.3 to 6 -0.3 to 45 -2.5 -0.3 to 11 -0.3 to 6 5 200 -40 to 125 -55 to 150 °C mA µA V UNIT
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 (3) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
MIN Input voltage, VI Operating free-air temperature, TA PWP PACKAGE(4)(5) (TOP VIEW) 8 -40 NOM MAX 40 85 UNIT V °C
KFF RT BP5 SYNC SGND SS/SD VFB COMP
1 2 3 4 5 6 7 8
THERMAL PAD
16 15 14 13 12 11 10 9
ILIM VIN BOOST HDRV SW BP10 LDRV PGND
(4) For more information on the PWP package, refer to TI Technical Brief, Literature No. SLMA002. (5) PowerPADt heat slug must be connected to SGND (pin 5) or electrically isolated from all other pins.
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TPS40050 TPS40051 TPS40053
SLUS540E - DECEMBER 2002 - REVISED APRIL 2004
ELECTRICAL CHARACTERISTICS
TA = -40°C to 85°C, VIN = 24 Vdc, RT = 90.9 k, IKFF = 150 µA, fSW = 500 kHz, all parameters at zero power dissipation (unless otherwise noted) PARAMETER INPUT SUPPLY VIN Input voltage range, VIN OPERATING CURRENT IDD BP5 VBP5 Output voltage OSCILLATOR/RAMP GENERATOR(2) fOSC Accuracy VRAMP PWM ramp voltage(1) VIH VIL ISYNC VRT High-level input voltage, SYNC Low-level input voltage, SYNC Input current, SYNC Pulse width, SYNC RT voltage Maximum duty cycle Minumum duty cycle VKFF IKFF ISS VSS tDSCH tSS BP10 VBP10 Ouput voltage ERROR AMPLIFIER IOUT 1 mA 8 V VIN 40 V, 8 V VIN 40 V, 8 V VIN 40 V, GBW AVOL IOH IOL VOH VOL IBIAS (1) (2) Gain bandwidth Open loop gain High-level output source current Low-level output sink current High-level output voltage Low-level output voltage Input bias current ISOURCE = 500 µA ISINK = 500 µA VFB = 0.7 V TA = 25°C 0°C TA 85°C -40°C TA 85°C 9.0 0.698 0.690 0.690 3.0 60 2.0 2.5 3.2 9.6 0.700 0.700 0.700 5.0 80 4.0 4.0 3.5 0.20 100 0.35 200 V nA mA 10.3 0.704 0.707 0.715 MHz dB V V Feed-forward voltage Feed-forward current operating range(1) Soft-start source current Soft-start clamp voltage Discharge time Soft-start time CSS = 220 pF CSS = 220 pF, 1.6 0 V VSS 1.6 V 115 VFB = 0 V, fSW 500 kHz VFB = 0 V, 500 kHz fSW 1 MHz VFB 0.75 V 3.35 20 1.75 2.35 3.7 2.2 155 2.8 205 3.48 50 2.38 85% 80% 0% 3.65 1100 2.85 V µA µA V µs 2.50 2.58 94% 5 IOUT 1 mA 8 V VIN 40 V VPEAK-VVAL 2 4.7 470 5.0 500 2.0 5 0.8 10 V V µA ns V 5.2 550 V kHz Quiescent current Output drivers not switching, VFB 0.75 V 8 40 V TEST CONDITIONS MIN TYP MAX UNIT
1.5
3.0
mA
SOFT START
VFB
Feedback input voltage
Ensured by design. Not production tested. IKFF increases with SYNC frequency, IKFF decreases with maximum duty cycle
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