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Vout

1.8V/3A

Vin

2.5V to 6V

PVIN

EN FB

10 Fm

470nH

22 Fm

TPS62090

Power Good

AVIN

500k

AGND

10nF

VOS

FREQ

10nF

PGND PGND

14 15

100

100m 1 10 100 1k 10k

I load (mA)

Efficiency (%)

= 3.7 V

= 4.2 V

= 5 V

OUT

= 3.3 V

L = 1 µH

f = 1.4 MHz

G002

TPS62090, TPS62091

TPS62092, TPS62093

www.ti.com

SLVSAW2A –MARCH 2012–REVISED MARCH 2012

3A High Efficient Synchronous Step Down Converter with DCS™ Control

Check for Samples: TPS62090, TPS62091, TPS62092, TPS62093

FEATURES

DESCRIPTION

The TPS6209x device family is a high frequency

• 2.5 V to 6 V Input Voltage Range

synchronous step down converter optimized for small

• DCS™ Control

solution size, high efficiency and suitable for battery

• 95% Converter Efficiency

powered applications. To maximize efficiency, the

converter operates in PWM mode with a nominal

• Power Save Mode

switching frequency of 2.8 MHz/1.4 MHz and

• 20 µA Operating Quiescent Current

automatically enters Power Save Mode operation at

• 100% Duty Cycle for Lowest Dropout

light load currents. When used in distributed power

supplies and point of load regulation, the device

• 2.8 MHz/1.4 MHz Typical Switching Frequency

allows voltage tracking to other voltage rails and

• 0.8 V to V

Adjustable Output Voltage

tolerates output capacitors ranging from 10 µF up to

• Fixed Output Voltage Versions

150 µF and beyond. Using the DCS™ Control

topology the device achieves excellent load transient

• Output Discharge Function

performance and accurate output voltage regulation.

• Adjustable Softstart

The output voltage start-up ramp is controlled by the

• Two Level Short Circuit Protection

softstart pin, which allows operation as either a

• Output Voltage Tracking

standalone power supply or in tracking configurations.

• Wide Output Capacitance Selection

Power sequencing is also possible by configuring the

Enable and Power Good pins. In Power Save Mode,

• Available in 3x3mm 16 Pin QFN Package

the device operates at typically 20 µA quiescent

current. Power Save Mode is entered automatically

APPLICATIONS

and seamlessly maintaining high efficiency over the

• Distributed Power Supplies

entire load current range.

• Notebook, Netbook Computers

• Hard Disk Drivers

• Processor Supply

• Battery Powered Applications

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.

2All trademarks are the property of their respective owners.

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 (26 pages)

PAGE 1
TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 3A High Efficient Synchronous Step Down Converter with DCS™ Control Check for Samples: TPS62090, TPS62091, TPS62092, TPS62093 FEATURES DESCRIPTION • • • • • • • • • • • • • • • The TPS6209x device family is a high frequency synchronous step down converter optimized for small solution size, high efficiency and suitable for battery powered applications.
PAGE 2
TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 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 VOUT ORDERING PACKAGE PACKAGE MARKING adjustable TPS62090 RGT SBW 3.3 V TPS62091 RGT SBX 2.5 V TPS62092 RGT SBY 1.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 ELECTRICAL CHARACTERISTICS VIN = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VIN Input voltage range IQIN Quiescent current Not switching, FB = FB +5 %, Into PVIN and AVIN 20 Isd Shutdown current Into PVIN and AVIN 0.6 5 Undervoltage lockout threshold VIN falling 2.2 2.3 UVLO 2.5 2.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com DEVICE INFORMATION PG 4 EN 14 13 12 11 Exposed Thermal Pad* 10 5 6 7 8 9 PVIN PVIN AVIN SS CN 3 PGND FREQ 15 CP 2 PGND SW 16 AGND 1 FB SW VOS 16 PIN 3x3mm QFN TOP VIEW NOTE: *The exposed Thermal Pad is connected to AGND. PIN FUNCTIONS PIN I/O DESCRIPTION NAME NO. SW 1, 2 I Switch pin of the power stage. FREQ 3 I This pin selects the switching frequency of the device.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 FUNCTIONAL BLOCK DIAGRAM CP PG PVIN CN Charge Pump for Gate driver VFB Hiccup current limit #32 counter VREF High Side Current Sense Bandgap Undervoltage Lockout Thermal shutdown AVIN PVIN EN M1 400kΩ SW MOSFET Driver Anti Shoot Through Converter Control Logic AGND SW High =1.4 MHz Low = 2.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com Table 1. List of components REFERENCE DESCRIPTION MANUFACTURER TPS62090 High efficient step down converter Texas Instruments L1 Inductor: 1uH, 0.47uH, 0.4uH Coilcraft XFL4020-102, XAL4020-401, TOKO DEF252012-R47 C1 Ceramic capacitor: 10uF, 22uF (6.3V, X5R, 0603), (6.3V, X5R, 0805) C2 Ceramic capacitor: 22uF (6.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 TYPICAL CHARACTERISTICS FIGURE vs load current (VO = 3.3 V, f = 1.4 MHz, f = 2.8 MHz) Figure 2, Figure 3 Efficiency vs load current (VO = 1.8 V, f = 1.4 MHz, f = 2.8 MHz) Figure 4, Figure 5 Efficiency vs load current (VO = 1.05 V, f = 1.4 MHz, f = 2.8 MHz) Figure 6, Figure 7 Output voltage vs load current (VO = 1.8 V, f = 1.4 MHz, f = 2.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com 100 100 95 95 90 90 85 85 Efficiency (%) Efficiency (%) SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 80 75 70 65 55 50 100m 1 10 100 I load (mA) 1k 75 70 65 VIN = 2.7 V VIN = 3.7 V VIN = 4.2 V VIN = 5 V VOUT = 1.8 V L = 1 µH f = 1.4 MHz 60 80 55 50 100m 10k 95 90 90 85 85 Efficiency (%) Efficiency (%) 100 95 80 75 70 55 50 100m 1 10 100 I load (mA) 1k VOUT = 1.05 V L = 0.4 µH f = 2.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 70 1600 60 1400 1200 50 Frequency (kHz) Resistance (Ω) www.ti.com 40 30 20 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) 5.5 6 600 400 0 6.5 1.75 3000 Frequency (kHz) Frequency (MHz) 1.5 1.25 1 0.75 VOUT = 1.8 V L = 1 µH f = 1.4 MHz IOUT = 1 A 2 2.5 3 3.5 4 4.5 Voltage (V) 5 400m 800m 1.2 1.6 2 Load Current (A) 5.5 6 2.4 2.8 3.2 G009 Figure 11.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com Vsw 2 V/div Vsw 2 V/div Vo 20 mV/div Vo 20 mV/div Vin = 3.7 V Vo=1.8 V/3 A f = 1.4 MHz, L = 1 µH Iinductor 1 A/div 400 ns/div Iinductor 500 mA/div 1 µs/div G012 Figure 16. PWM Operation G013 Figure 17. PFM Operation Vo 20 mV/div Vsw 2 V/div Io 1 A/div Vo 20 mV/div Iinductor 500 mA/div Vin = 3.7 V Vo = 1.8 V/100 mA f = 1.4 MHz, L = 1 µH Vin = 3.7 V Vo = 1.8 V/100 mA f = 2.8 MHz, L = 0.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 Vo 1 V/div Vo 50 mV/div Io 2 A/div Io 1 A/div Vin = 3.7 V Vo = 1.8 V f = 1.4 MHz, L = 1 µH Iinductor 1 A/div Vin = 3.7 V Vo = 1.8 V,0.3 A to 2.5 A f = 1.4 MHz, L = 1 µH Co = 22 µF Iinductor 1 A/div 400 µs/div 4 µs/div G020 Figure 24. Hiccup Short Circuit Protection G021 Figure 25. Load Transient Response Vo 50 mV/div Vo 50 mV/div Io 1 V/div Vin = 3.7 V Vo = 1.8 V, 0.3 A to 2.5 A f = 1.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com Power Save Mode Operation As the load current decreases, the converter enters Power Save Mode operation. During Power Save Mode the converter operates with reduced switching frequency in PFM mode and with a minimum quiescent current while maintaining high efficiency. The Power Save Mode is based on a fixed on-time architecture following Equation 1. When operating at 1.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 Start-up Tracking (SS) The softstart pin can also be used to implement output voltage tracking with other supply rails. The internal reference voltage follows the voltage at the softstart pin with a fraction of 1.56 until the internal reference voltage of 0.8 V is reached. The softstart pin can be used to implement output voltage tracking as shown in Figure 28. TPS62090 Vin 2.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com Frequency Set Pin (FREQ) The FREQ pin is a digital logic input which sets the nominal switching frequency. Pulling this pin to GND sets the nominal switching frequency to 2.8 MHz and pulling this pin high sets the nominal switching frequency to 1.4 MHz. Since this pin changes the switching frequency it also changes the on-time during PFM mode. At 1.4 MHz the on-time is twice the on-time as operating at 2.8 MHz.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 Inductor Selection The inductor selection is affected by several parameter like inductor ripple current, output voltage ripple, transition point into Power Save Mode, and efficiency. See Table 4 for typical inductors. Table 4. Inductor Selection INDUCTOR VALUE COMPONENT SUPPLIER SIZE (LxWxH mm) Isat/DCR 0.6 µH Coilcraft XAL4012-601 4 x 4 x 2.1 7.1A/9.5 mΩ 1 µH Coilcraft XAL4020-102 4 x 4 x 2.1 5.9A/13.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com Setting the Output Voltage The output voltage is set by an external resistor divider according to the following equations: R1 ö R1 ö æ æ VOUT = VFB ´ ç 1 + = 0.8 V ´ ç 1 + ÷ R2 ø R2 ÷ø è è (9) V 0.8 V R2 = FB = » 160 kΩ IFB 5 μA (10) æV ö æV ö R1 = R2 ´ ç OUT - 1÷ = R2 ´ ç OUT - 1÷ è 0.
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TPS62090, TPS62091 TPS62092, TPS62093 www.ti.com SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 L1 470nH TPS62090 Vin 2.5V to 6V 12 11 C1 10mF 10 C3 10nF SW PVIN SW AVIN VOS 13 EN 7 C4 10nF R1 140k 2 C2 22mF 16 R2 160k FB 5 R3 500k PG 4 CP 8 Vout 1.5V/3A 1 PVIN 9 SS Power Good 3 FREQ CN AGND 6 PGND PGND 14 15 Figure 30. 1.5 V Adjustable Version Operating at 2.8 MHz L1 1mH TPS62090 Vin 2.5V to 6V 12 11 C1 22mF 10 C3 10nF SW PVIN SW AVIN VOS 7 9 Vout 1.
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TPS62090, TPS62091 TPS62092, TPS62093 SLVSAW2A – MARCH 2012 – REVISED MARCH 2012 www.ti.com REVISION HISTORY Changes from Original (March 2012) to Revision A Page • Changed the FUNCTIONAL BLOCK DIAGRAM .................................................................................................................. 5 • Changed R1, R2 and R4 values in Figure 28 .....................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62090RGTR QFN RGT 16 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 TPS62090RGTT QFN RGT 16 250 180.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPS62091RGTR QFN RGT 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62090RGTR QFN RGT 16 3000 367.0 367.0 35.0 TPS62090RGTT QFN RGT 16 250 210.0 185.0 35.0 TPS62091RGTR QFN RGT 16 3000 367.0 367.0 35.0 TPS62091RGTT QFN RGT 16 250 210.0 185.0 35.0 TPS62092RGTR QFN RGT 16 3000 367.0 367.0 35.0 TPS62092RGTT QFN RGT 16 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.