|
Details, datasheet, quote on part number:TPS40004DGQR
| |
Datasheet text preview:
TPS40000, TPS40001 TPS40002, TPS40003 TPS40004, TPS40005
SLUS507C - JANUARY 2002 - REVISED JUNE 2004
LOW INPUT VOLTAGE MODE SYNCHRONOUS BUCK CONTROLLER
FEATURES D Operating Input Voltage 2.25 V to 5.5 V D Output Voltage as Low as 0.7 V D 1% Internal 0.7 V Reference D Predictive Gate Drivet N-Channel MOSFET
Drivers for Higher Efficiency
D Externally Adjustable Soft-Start and D D D D D D
Overcurrent Limit Source-Only Current or Source/Sink Current Versions for Starting Into VOUT Pre-Bias 10-Lead MSOP PowerPadt Package for Higher Performance Thermal Shutdown Internal Boostrap Diode Fixed-Frequency, Voltage-Mode Control - TPS40000/1/4 300-kHz - TPS40002/3/5 600-kHz
APPLICATIONS D Networking Equipment D Telecom Equipment D Base Stations D Servers D DSP Power D Power Modules DESCRIPTION
The TPS4000x are controllers for low-voltage, non-isolated synchronous buck regulators. These controllers drive an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the device controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI's proprietary Predictive Gate Drivet technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated.
SIMPLIFIED APPLICATION DIAGRAM
VIN TPS40000 1 2 3 4 ILIM FB COMP SW SS/SD VDD 5 GND LDRV 7 6 8 BOOT 10 HDRV 9 VOUT
UDG-01141
PowerPADt and Predictive Gate Drivet are trademarks of Texas Instruments Incorporated.
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, Texas Instruments Incorporated
www.ti.com
1
SLUS507C - JANUARY 2002 - REVISED JUNE 2004
TPS40000, TPS40001 TPS40002, TPS40003 TPS40004, TPS40005
DESCRIPTION (continued)
The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor connected to the SS/SD pin. The SS/SD pin is also used for shutdown.
ORDERING INFORMATION
PACKAGED DEVICES MSOP(2) (DGQ) APPLICATION TA -40°C to 85°C (2) (3) FREQUENCY 300 kHz 600 kHz SOURCE ONLY TPS40000DGQ TPS40002DGQ SOURCE/SINK WITH PREBIAS(3) TPS40001DGQ TPS40003DGQ SOURCE/SINK(3) TPS40004DGQ TPS40005DGQ
The DGQ package is available taped and reeled. Add R suffix to device type (e.g. TPS40000DGQR) to order quantities of 2,500 devices per reel and 80 units per tube. See Application Information section, p. 8.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1) TPS4000x BOOT COMP, FB, ILIM, SS/SD Input voltage range, VIN SW SWT (SW transient < 50 ns) VDD Operating junction temperature range, TJ Storage temperature, Tstg VSW + 6.5 -0.3 to 6 -0.7 to 10.5 -2.5 6 -40 to 150 -55 to 150 °C V UNIT
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 (1) 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.
DGQ PACKAGE(4).(5) (TOP VIEW)
ILIM FB COMP SS/SD GND
1 2 3 4 5
10 9 8 7 6
BOOT HDRV SW VDD LDRV
ACTUAL SIZE 3,05mm x 4,98mm (4) (5) See technical brief SLMA002 for PCB guidelines for PowerPAD packages. PowerPADt heat slug can be connected to GND (pin 5).
2
www.ti.com
SLUS507C - JANUARY 2002 - REVISED JUNE 2004
TPS40000, TPS40001 TPS40002, TPS40003 TPS40004, TPS40005
ELECTRICAL CHARACTERISTICS
over recommended operating temperature range, TA = -40_C to 85_C, VDD = 5.0 V, all parameters measured at zero power dissipation (unless otherwise noted) input supply
PARAMETER VDD VHGATE IDD UVLO Input voltage range High-side gate voltage Shutdown current Quiescent current Switching current Minimum on-voltage Hysteresis VBOOT - VSW SS/SD = 0 V, FB = 0.8 V No load at HDRV/LDRV 1.95 80 Outputs off TEST CONDITIONS MIN 2.25 0.25 1.4 1.5 2.05 140 TYP MAX 5.5 5.5 0.45 2.0 4.0 2.15 200 V mV mA V UNIT
oscillator
PARAMETER TPS40000 TPS40001 TPS40004 fOSC Oscillator frequency TPS40002 TPS40003 TPS40005 TEST CONDITIONS MIN 250 2.25 V VDD 5.00 V 500 VPEAK - VVALLEY 0.80 0.24 600 0.93 0.31 700 1.07 0.41 V TYP 300 MAX 350 kHz UNIT
VRAMP
Ramp voltage Ramp valley voltage
PWM
PARAMETER TPS40000 TPS40001 TPS40004 TPS40002 TPS40003 TPS40005 FB = 0 V, VDD = 3.3 V 83% 93% 97% 0% TEST CONDITIONS MIN 87% TYP 94% MAX 97% UNIT
Maximum duty cycle(2)
Minimum duty cycle
error amplifier
PARAMETER Line, VFB FB input voltage FB input bias current VOH VOL IOH IOL GBW High-level output voltage Low-level output voltage Output source current Output sink current Gain bandwidth(1) FB = 0 V, FB =VDD, COMP = 0.7 V, COMP = 0.7 V, IOH = 0.5 mA IOL = 0.5 mA FB = GND FB = VDD 2.0 2 3 5 55 TA = 25°C TEST CONDITIONS Temperature MIN 0.689 0.693 TYP 0.700 0.700 30 2.5 0.08 6 8 10 85 mA MHz dB 0.15 V MAX 0.711 0.707 130 V nA UNIT
AOL Open loop gain (1) Ensured by design. Not production tested. (2) At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%.
www.ti.com
3
|
|
