Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage regulators - DC DC switch controllers VSON 10

BOOT

ENABLE

COMP

TPS40190

10HDRV

5 6

BP5

VDD

GND

7LDRV

SHUTDOWN

VDD

UDG−05059

OUT

TPS40190

www.ti.com

SLUS658C –JULY 2005–REVISED JULY 2012

LOW PIN COUNT SYNCHRONOUS BUCK CONTROLLER

Check for Samples: TPS40190

FEATURES

DESCRIPTION

• Input Operating Voltage Range: 4.5 V to 15 V

The TPS40190 is a cost-optimized synchronous buck

• Reference 0.591 V ±1%

controller that operates from 4.5 V to 15 V nominally,

• Voltage Mode Control

and implements a fixed frequency voltage mode

power supply. The controller uses an adaptive anti-

• Internal 5-V Regulator For Internal

cross conduction scheme to prevent both the high-

Housekeeping, Driver Power and Light

side and the rectifier MOSFET to be turned on at the

External Loads

same time, preventing shoot through current in the

• Selectable Short-Circuit Protection Thresholds

two MOSFETs.

• Pre-Bias Ouput Safe

The controller also provides a short circuit protection

• Fixed Switching Frequency of 300 kHz

threshold that is user selectable between one of three

• Internal Soft-Start

values. The protection level is set with a single

external resistor connected from COMP to GND.

• Small 3 mm × 3 mm, 10-Pin SON Package

During start-up, the impedance connected to COMP

• Bootstrapped Drivers for N-Channel MOSFET

is sensed, and the information is decoded to select

• Adaptive Anti-Cross Conduction

one of the three thresholds. When the controller

senses an output short circuit, both MOSFETs are

• Internal Bootstrap Diode

turned off and a timeout period is observed before

• 1.2-A Drivers for Decreased Switching Loss

attempting to restart. This provides limited power

dissipation in the event of a sustained fault.

APPLICATIONS

The TPS40190 provides strong drivers to minimize

• Cable modem CPE

switching losses in the power stage, reducing heat

• Digital Set Top Box

build up in the MOSFETs and allowing larger

MOSFETs to be used without undue switching time

• Graphics/Audio Cards

penalty.

• Entry-level and Mid-Range Servers

SIMPLIFIED APPLICATION DIAGRAM

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 LOW PIN COUNT SYNCHRONOUS BUCK CONTROLLER Check for Samples: TPS40190 FEATURES 1 • • • • • • • • • • • • • Input Operating Voltage Range: 4.5 V to 15 V Reference 0.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com 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 (1) TA PACKAGE -40°C to 85°C Plastic DRC (SON) PART NUMBER (1) TPS40190DRCR TPS40190DRCT The TPS40190 is available taped and reeled only. Use large reel device type R to order quantities of 3000 units per reel.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 ELECTRICAL CHARACTERISTICS TA = –40°C to 85°C, VVDD= 12 Vdc, TA =TJ, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 0°C ≤ TJ ≤ 85°C 585 591 597 -40°C ≤ TJ ≤ 85°C 582 591 597 UNIT REFERENCE VFB Feedback voltage range mV INPUT SUPPLY VVDD IVDD Input voltage range Operating current 15.0 V VENABLE = 2.5 V, Outputs switching 4.5 2.5 mA VENABLE = 0.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) TA = –40°C to 85°C, VVDD= 12 Vdc, TA =TJ, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OUTPUT DRIVERS RHDHI High-side driver pull-up resistance VBOOT - VSW = 4.5 V, IHDRV = -100 mA 3 6 RHDLO High-side driver pull-down resistance VBOOT - VSW = 4.5 V, IHDRV = 100 mA 1.5 3.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 DEVICE INFORMATION TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. BOOT 8 I Power supply for the flying high-side driver BP5 6 O Output bypass for the internal regulator. Connect 4.7-μF capacitor from this pin to GND. Low power, low noise loads may be connected here if desired. The sum of the external load and the gate drive requirements must not exceed 40 mA. The regulator is turned off when the ENABLE pin is pulled low.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com APPLICATION INFORMATION Introduction The TPS40190 is a cost optimized controller providing all the necessary features to construct a high-performance DC-DC converter while keeping costs to a minimum. Support for pre-biased outputs eliminates concerns about damaging sensitive loads during startup. Strong gate drivers for the high side and rectifier N-channel MOSFETs decrease switching losses for increased efficiency.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 Output Short Circuit Protection The short circuit detection in the TPS40190 is done by sensing the voltage drop across the high side FET when it is on. If the voltage drop across this FET exceeds the selected threshold in any given switching cycle, a counter counts up one count and the FET is turned off early.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com RELATIVE SHORT CIRCUIT THRESHOLD CHANGE vs TEMPERATURE 1.3 FET Resistance Relative Change 1.2 1.1 1.0 Short Circuit Threshold Voltage 0.9 0.8 0.7 −50 −25 0 25 50 75 TJ − Junction Temperature − °C 100 Figure 3. Table 1. Short Circuit Threshold Voltage Selection Short Circuit Protection Resistance RCOMP (kΩ) Nominal Current Limit Voltage VILIM (mV) 10.8 to 13.2 460 OPEN 320 3.6 to 4.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 Enable Functionality The TPS40190 has a dedicated ENABLE pin. This simplifies user level interface design since no multiplexed functions exist. Another benefit is a true low power shutdown mode of operation. In this state, the BP5 regulator is turned off. When the ENABLE pin is pulled to GND, the TPS40190 consumes a typical 20-μA of current. A functionally equivalent circuit to the enable circuitry on the TPS40190 is shown in Figure 4.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com Typical waveforms for startup and shutdown using the ENABLE pin are shown in Figure 5 and Figure 6. VENABLE (10 V/ div) VENABLE (5 V/ div) VLDRV (10 V/ div) VCOMP (500 mV/ div) VSW (10 V/ div) VOUT (500 mV/ div) VOUT (500 mV/ div) T − Time − 2 ms / div T − Time − 20 µs / div Figure 5. Startup Using ENABLE Pin Figure 6.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 Pre-Bias Outputs Some applications require that the converter not sink current during startup if a pre-existing voltage is higher than the output. Since synchronous buck converters inherently sink current some method of overcoming this characteristic must be employed. Applications that require this operation are typically power rails for a multi supply processor or ASIC.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 110 Ω www.ti.com 12 V 120 µF 10 kΩ 4.7 nF TPS40190 On/Off 634 Ω 82 nF ENABLE HDRV 10 2 FB 2 2 Si4874BDY 1 2 µH, COEV DXM1306 2R0 9 SW 3 COMP BOOT 8 4 VDD LDRV 7 5 GND BP5 6 5 V, 10 A 1 Si4874BDY 820 pF 47 µF TDK C3225X5R0J476M 2 22 µF TDK C3225X5R1C226M 1 1 4.7 µF 1 µF 1.33 kΩ 1 VOUT 100 nF 10 nF UDG−05072 Figure 9. 12-V to 5-V at 10 A 12 V 137 Ω 120 µF 10 kΩ 3.3 nF TPS40190 2 Si7344DP 1 ENABLE 2 FB 1.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 + www.ti.com Figure 11. PMP1285, 12-V to 1.5-V, at 3.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com Typical Characteristics REFERENCE VOLTAGE vs TEMPERATURE REFERENCE VOLTAGE vs INPUT VOLTAGE 592.0 591.02 VVDD = 12 V TJ = 25°C 591.00 VVREF − Voltage Reference − V VVREF − Voltage Reference − V 591.5 591.0 590.5 590.0 589.5 589.0 −50 590.98 590.96 590.94 590.92 590.90 590.88 4.5 −25 0 25 50 75 100 6.0 7.5 125 9.0 10.5 12.0 13.5 15.0 VVDD − Input Voltage − V TJ − Junction Temperature − °C Figure 12. Figure 13.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 Typical Characteristics (continued) OPERATING CURRENT vs TEMPERATURE OPERATING CURRENT vs INPUT VOLTAGE 16 18 14 IVDD − Operating Current − µA IVDD − Operating Current − µA 16 VVDD = 12 V VENABLE < 0.6 V 14 12 10 8 6 2 −50 −25 0 25 50 75 100 TJ − Junction Temperature − °C 10 8 6 4 0 4.5 125 9.0 10.5 12.0 Figure 17. ENABLE THRESHOLD ON vs TEMPERATURE ENABLE THRESHOLD ON vs INPUT VOLTAGE 13.5 15.0 1.840 TJ = 25°C 2.0 1.5 1.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com Typical Characteristics (continued) ENABLE THRESHOLD OFF vs TEMPERATURE ENABLE THRESHOLD OFF vs INPUT VOLTAGE 1.4 1.20 VVDD = 12 V TJ = 25°C 1.2 VIL − Enable Threshold Off − V VIL − Enable Threshold Off − V 1.18 1.0 0.8 0.6 0.4 0.2 0 −50 −25 0 25 50 75 100 1.16 1.14 1.12 1.10 4.5 125 6.0 TJ − Junction Temperature − °C 7.5 9.0 10.5 12.0 13.5 15.0 100 125 VVDD − Input Voltage − V Figure 20. Figure 21.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 Typical Characteristics (continued) SOFT START TIMING vs INPUT VOLTAGE CURRENT LIMIT THRESHOLD vs TEMPERATURE 4.705 VILIM − Current Limit Threshold Voltage − mV 4.700 250 TJ = 25°C tSS − Soft−Start Time − ms 4.695 4.690 4.685 4.680 4.675 4.670 4.665 4.660 4.655 4.5 6.0 7.5 9.0 10.5 12.0 VVDD − Input Voltage − V 13.5 100 50 −25 0 25 50 75 Figure 24. Figure 25.
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TPS40190 SLUS658C – JULY 2005 – REVISED JULY 2012 www.ti.com Typical Characteristics (continued) CURRENT LIMIT THRESHOLD vs INPUT VOLTAGE CURRENT LIMIT THRESHOLD vs TEMPERATURE 450 VILIM − Current Limit Threshold Voltage − mV ViLIM − Current Limit Threshold Voltage − mV 470 TJ = 25°C RCOMP = 12 kΩ 469 468 467 466 465 464 463 4.5 6.0 7.5 9.0 10.5 12.0 VVDD − Input Voltage − V 13.5 400 VVDD = 12 V RCOMP = OPEN 350 300 250 200 150 100 50 0 −50 15.0 TJ = 25°C RCOMP = OPEN 75 100 125 4.
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TPS40190 www.ti.com SLUS658C – JULY 2005 – REVISED JULY 2012 REVISION HISTORY Changes from Revision B (August 2007) to Revision C • Page Added a new paragraph to the end of the Enable Functionality section ..............................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Mar-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS40190DRCR SON DRC 10 3000 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q2 TPS40190DRCT SON DRC 10 250 180.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Mar-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS40190DRCR SON DRC 10 3000 370.0 355.0 55.0 TPS40190DRCT SON DRC 10 250 210.0 185.0 35.
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