Datasheet

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22uF

1.8V / 2A

10uF

2.2 µH

(3 .. 17)V

3.3nF

TPS62141

PVIN

AVIN

SS/TR

DEF

FSW

VOS

AGND

PGND

100k

TPS62140, TPS62140A

TPS62141, TPS62142, TPS62143

www.ti.com

SLVSAJ0B –NOVEMBER 2011–REVISED JUNE 2013

3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package

Check for Samples: TPS62140, TPS62140A, TPS62141, TPS62142, TPS62143

FEATURES

DESCRIPTION

The TPS6214X family is an easy-to-use synchronous

• DCS-Control

Topology

step-down dc-dc converter optimized for applications

• Input Voltage Range: 3 V to 17 V

with high power density. A high switching frequency

• Up to 2-A Output Current

of typically 2.5MHz allows the use of small inductors

and provides fast transient response by use of the

• Adjustable Output Voltage from 0.9 V to 6 V

DCS-Control™ topology.

• Pin-Selectable Output Voltage (Nominal, +5%)

With its wide operating input voltage range of 3V to

• Programmable Soft Start and Tracking

17V, the devices are ideally suited for systems

• Seamless Power-Save Mode Transition

powered from either a Li-Ion or other batteries, as

• Quiescent Current of 17 µA (typ.)

well as from 12-V intermediate power rails. It

supports up to 2A of continuous output current at

• Selectable Operating Frequency

output voltages between 0.9V and 6V (with 100%

• Power-Good Output

duty-cycle mode).

• 100% Duty-Cycle Mode

The output voltage start-up ramp is controlled by the

• Short-Circuit Protection

soft-start pin, which allows operation as either a

• Over Temperature Protection

standalone power supply or in tracking configurations.

Power sequencing is also possible by configuring the

• Available in a 3-mm × 3-mm, QFN-16 Package

Enable (EN) and open-drain Power Good (PG) pins.

APPLICATIONS

In power-save mode, the devices show quiescent

current of about 17μA from VIN. Power Save Mode,

• Standard 12-V Rail Supplies

entered automatically and seamlessly if load is small,

• POL Supply From Single or Multiple Li-Ion

maintains high efficiency over the entire load range.

Battery

In Shutdown Mode, the device is turned off and

• Solid-State Disk Drives shutdown current consumption is less than 2μA.

• Embedded Systems

The device, available in adjustable and fixed output

voltage versions, is packaged in a 16-pin QFN

• LDO Replacement

package measuring 3 × 3 mm (RGT).

• Mobile PCs, Tablet, Modems, Cameras

spacing

Figure 1. Typical Application and Efficiency

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 (36 pages)

PAGE 1
TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package Check for Samples: TPS62140, TPS62140A, TPS62141, TPS62142, TPS62143 FEATURES DESCRIPTION 1 • • • • • • • • • • • • • • The TPS6214X family is an easy-to-use synchronous step-down dc-dc converter optimized for applications with high power density. A high switching frequency of typically 2.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 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 OUTPUT VOLTAGE PART NUMBER (2) adjustable TPS62140 TPS62140RGT QTZ adjustable TPS62140A (3) TPS62140ARGT PA7I 1.8 V TPS62141 TPS62141RGT QWA 3.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com DEVICE INFORMATION SW 3 PG 4 PGND VOS EN 13 Exposed Thermal Pad 5 6 7 8 DEF 2 14 FSW SW 15 AGND 1 16 FB SW PGND RGT PACKAGE (TOP VIEW) 12 PVIN 11 PVIN 10 AVIN 9 SS/TR Terminal Functions PIN (1) NAME NO. I/O DESCRIPTION SW 1, 2 ,3 O Switch node, which is connected to the internal MOSFET switches. Connect inductor between SW and output capacitor.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 FUNCTIONAL BLOCK DIAGRAM PG Soft start Thermal Shtdwn UVLO AVIN PVIN PVIN PG control HS lim comp EN* SW SS/TR power control control logic gate drive SW DEF* SW FSW* comp LS lim VOS direct control & compensation ramp _ FB comparator + timer tON error amplifier DCS - ControlTM * This pin is connected to a pull down resistor internally (see Detailed Description section).
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com PG Soft start Thermal Shtdwn UVLO AVIN PVIN PVIN PG control HS lim comp EN* SW SS/TR power control control logic DEF gate drive SW * SW FSW* comp LS lim VOS direct control & compensation ramp _ FB* comparator + timer tON error amplifier DCS - ControlTM * This pin is connected to a pull down resistor internally (see Detailed Description section). AGND PGND PGND Figure 3.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 PARAMETER MEASUREMENT INFORMATION List of Components REFERENCE DESCRIPTION IC 17-V, 2-A step-down converter, QFN MANUFACTURER L1 2.2-µH, 3.1-A, 0.165 in × 0.165 in Cin 10-µF, 25-V, ceramic Standard Cout 22-µF, 6.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs INPUT VOLTAGE 100.0 100.0 90.0 90.0 80.0 70.0 VIN=12V VIN=17V Efficiency (%) Efficiency (%) 80.0 60.0 50.0 40.0 30.0 0.0 0.0001 IOUT=1mA IOUT=1A IOUT=100mA 40.0 0.001 0.01 0.1 Output Current (A) 1 VOUT=5.0V L=2.2uH (XFL4020) Cout=22uF 10.0 0.0 10 7 8 9 10 G001 11 12 13 Input Voltage (V) 14 15 16 Figure 6. Efficiency With 1.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 EFFICIENCY vs INPUT VOLTAGE 100.0 100.0 90.0 90.0 80.0 80.0 70.0 70.0 60.0 VIN=12V 50.0 Efficiency (%) Efficiency (%) EFFICIENCY vs OUTPUT CURRENT VIN=17V VIN=5V 40.0 30.0 IOUT=1mA IOUT=10mA IOUT=1A 40.0 0.0 0.0001 0.001 0.01 0.1 Output Current (A) 1 VOUT=3.3V L=2.2uH (XFL4020) Cout=22uF 20.0 VOUT=3.3V L=2.2uH (XFL4020) Cout=22uF 10.0 10.0 0.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs INPUT VOLTAGE 3.40 3.40 Output Voltage (V) Output Voltage (V) VIN=17V 3.35 VIN=12V 3.30 VIN=5V 3.25 VOUT=3.3V L=2.2uH (XFL4020) Cout=22uF 3.20 0.0001 0.001 0.01 0.1 Output Current (A) 1 3.25 VOUT=3.3V L=2.2uH (XFL4020) Cout=22uF 4 7 10 13 Input Voltage (V) 16 G001 Figure 18.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 STATIC DRAIN-SOURCE-RESISTANCE (RDSon) vs INPUT VOLTAGE STATIC DRAIN-SOURCE-RESISTANCE (RDSon) vs INPUT VOLTAGE 100.0 200.0 160.0 125°C RDSon Low−Side (mΩ) RDSon High−Side (mΩ) 180.0 140.0 120.0 85°C 100.0 25°C 80.0 −10°C 60.0 −40°C 40.0 80.0 125°C 60.0 85°C 25°C 40.0 −10°C 20.0 −40°C 20.0 0.0 0.0 3.0 6.0 9.0 12.0 Input Voltage (V) 15.0 0.0 0.0 18.0 20.0 6.0 9.0 12.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 12 www.ti.com OUTPUT VOLTAGE vs TIME OUTPUT VOLTAGE vs TIME Figure 29. PWM-PSM-Transition (VIN=12 V, VOUT = 3.3 V With 50 mV/div) Figure 30. Load Transient Response (IOUT= 0.5 to 2 to 0.5 A, VIN = 12 V, VOUT = 3.3 V) OUTPUT VOLTAGE vs TIME OUTPUT VOLTAGE vs TIME Figure 31. Line Transient Response of Figure 30, Rising Edge Figure 32.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 OUTPUT VOLTAGE vs TIME OUTPUT VOLTAGE vs TIME Figure 33. Start-Up Into 100 mA (VIN = 12 V, VOUT = 3.3 V) Figure 34. Start-Up into 2 A (VIN = 12 V, VOUT = 3.3 V) PWM SIGNALS vs TIME POWER SAVE MODE SIGNALS vs TIME Figure 35. Typical Operation in PWM Mode (IOUT = 1 A) Figure 36.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com AMBIENT TEMPERATURE vs OUTPUT CURRENT AMBIENT TEMPERATURE vs OUTPUT POWER 125 Free−Air Temperature (°C) Free−Air Temperature (°C) 125 115 105 95 TPS62140 EVM L=2.2uH (XFL4020) VIN=12V, VOUT=3.3V 85 75 0 0.5 1 1.5 Output Current (A) Submit Documentation Feedback 105 95 85 75 TPS62140 EVM L=2.2uH (XFL4020) VIN=12V, VOUT=3.3V 65 2 2.5 G000 Figure 37.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 DETAILED DESCRIPTION Device Operation The TPS6214X synchronous switched-mode power converters are based on DCS-Control™ (Direct Control with Seamless Transition into Power-Save Mode), an advanced regulation topology, that combines the advantages of hysteretic, voltage-mode and current-mode control including an ac loop directly associated with the output voltage.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com 100% Duty-Cycle Operation The duty cycle of the buck converter is given by D = Vout/Vin and increases as the input voltage comes close to the output voltage. In this case, the device starts 100% duty-cycle operation, turning on the high-side switch 100% of the time. The high-side switch stays turned on as long as the output voltage is below the internal setpoint.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 where ILIMF is the static current limit, specified in the ELECTRICAL CHARACTERISTICS L is the inductor value VL is the voltage across the inductor (VIN – VOUT) tPD is the internal propagation delay The current limit can exceed static values, especially if the input voltage is high and very small inductances are used.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com APPLICATION INFORMATION The following information is intended to be a guideline through the individual power-supply design process. Programming the Output Voltage While the output voltage of the TPS62140 is adjustable, the TPS62141/2/3 are programmed to fixed output voltages. For fixed output versions, the FB pin is pulled down internally and may be left floating.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com Soft-Start Capacitor A capacitance connected between the SS/TR pin and AGND allows a user-programmable start-up slope of the output voltage. A constant-current source provides 2.5 µA to charge the external capacitance. The capacitor required for a given soft-start ramp time for the output voltage is given by: C SS = t SS × 2.5mA 1.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 VOUT1 PVIN SW AVIN VOS EN PG TPS62140 SS/TR FB DEF AGND FSW PGND PVIN SW AVIN VOS VOUT2 R1 EN PG TPS62140 SS/TR R2 FB DEF AGND FSW PGND Figure 40. Sequence for Ratiometric and Simultaneous Startup The resistive divider of R1 and R2 can be used to change the ramp rate of VOUT2 faster, slower, or the same as VOUT1.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com spacing f pole = 1 2p × 25 pF æ 1 1 ö ÷÷ × çç + è R1 R 2 ø (14) spacing Though the TPS6214X devices are stable without the pole and zero being in a particular location, adjusting their location to the specific needs of the application can provide better performance in power-save mode and/or improved transient response. An external feed-forward capacitor can also be added.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 GND R2 8 C PVIN AVIN 7 R1 6 5 9 4 10 3 11 2 12 1 13 CIN 14 15 PG 16 EN L1 to GND plane VOUT COUT to AGND GND Figure 41. Layout Example THERMAL INFORMATION Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com Application Example As Power LED Supply The TPS62140 can be used as a power supply for power LEDs. The FB pin can be easily set down to lower values than nominal by using the SS/TR pin. With that, the voltage drop on the sense resistor is low to avoid excessive power loss. Because this pin provides 2.5 µA, the feedback pin voltage can be adjusted by an external resistor per Equation 15.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 spacing spacing spacing (3.3 .. 17)V 3.3V / 2A 2.2 µH 10uF PVIN SW AVIN VOS 100k PG EN 22uF TPS62142 FB SS/TR 3.3nF DEF AGND FSW PGND Figure 44. 3.3-V/2-A Power Supply spacing spacing spacing (3 .. 17)V 2.5V / 2A 2.2 µH PVIN SW AVIN VOS 100k PG EN 10uF 390k 22uF TPS62140 FB SS/TR 3.3nF DEF AGND FSW PGND 180k Figure 45. 2.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com spacing spacing spacing (3 .. 17)V 1.5V / 2A 2.2 µH PVIN SW AVIN VOS 100k PG EN 10uF 130k 22uF TPS62140 FB SS/TR 3.3nF DEF AGND FSW PGND 150k Figure 47. 1.5-V/2-A Power Supply spacing spacing spacing (3 .. 17)V 1.2V / 2A 2.2 µH PVIN SW AVIN VOS 100k PG EN 10uF 75k 22uF TPS62140 FB SS/TR 3.3nF DEF AGND FSW PGND 150k Figure 48. 1.
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 www.ti.com SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 Application Example As Inverting Power Supply spacing The TPS62140 can be used as inverting power supply by rearranging external circuitry as shown in Figure 50. As the former GND node now represents a voltage level below system ground, the voltage difference between VIN and VOUT has to be limited for operation to the maximum supply voltage of 17V (see Equation 16).
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TPS62140, TPS62140A TPS62141, TPS62142, TPS62143 SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013 www.ti.com REVISION HISTORY Changes from Original (November 2011) to Revision A Page • Added values to the Initial output voltage accuracy for TA = –10°C to 85°C ........................................................................ 3 • Changed the description of the AGND pin, and added Note 3. ...........................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 23-Jul-2013 (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jun-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62140ARGTR QFN RGT 16 TPS62140ARGTT QFN RGT TPS62140RGTR QFN RGT TPS62140RGTT QFN TPS62141RGTR SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 16 250 180.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 16 3000 330.0 12.4 3.3 3.3 1.1 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jun-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62140ARGTR QFN RGT 16 3000 552.0 367.0 36.0 TPS62140ARGTT QFN RGT 16 250 210.0 185.0 35.0 TPS62140RGTR QFN RGT 16 3000 552.0 367.0 36.0 TPS62140RGTT QFN RGT 16 250 552.0 185.0 36.0 TPS62141RGTR QFN RGT 16 3000 552.0 367.0 36.0 TPS62141RGTT QFN RGT 16 250 552.0 185.0 36.
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