Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Holder SON 6

100

Efficiency - %

0.0001 0.001 0.01 0.1 1

I - Output Current - A

V = 5 V

V = 4.2 V

V = 3.8 V

V = 3.3 V,

MODE = GND,

OUT

VIN

GND

TPS62590DRV

OUT

MODE

2.2 Hm

OUT

10mF

22pF

10mF

PwrPAD

0.75 V to V

I N

2.5 V to 5.5 V

Typical Application

TPS62590

www.ti.com

SLVS897B –JANUARY 2009– REVISED APRIL 2011

1-A Step Down Converter in 2 x 2 QFN Package

Check for Samples: TPS62590

FEATURES

DESCRIPTION

The TPS62590 device is a high efficiency

• Output Current up to 1000 mA

synchronous step down converter, optimized for

• Input Voltage Range from 2.5 V to 5.5 V

battery powered portable applications. It provides up

• Output Voltage Accuracy in PWM mode ±2.5%

to 1000-mA output current from batteries, such as

single Li-Ion or other common chemistry AA and AAA

• Typ. 15-μA Quiescent Current

cells.

• 100% Duty Cycle for Lowest Dropout

With an input voltage range of 2.5 V to 5.5 V, the

• Available in a 2 × 2 × 0.8 mm QFN Package

device is targeted to power a large variety of portable

• For Improved Features Set, See TPS62290

handheld equipment or POL applications.

The TPS62590 family operates at 2.25-MHz fixed

APPLICATIONS

switching frequency and enters a Power Save Mode

• Portable Handheld

operation at light load currents to maintain a high

• WLAN

efficiency over the entire load current range.

• Low Power DSP Supply

The Power Save Mode is optimized for low output

voltage ripple. For low noise applications, the device

• POL

can be forced into fixed frequency PWM mode by

pulling the MODE pin high. In the shutdown mode the

current consumption is reduced to less than 1 µA.

The TPS62590 allows the use of small inductors and

capacitors to achieve a small solution size.

The TPS62590 is available in a 2-mm × 2-mm 6-pin

QFN package.

Empty para

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.

2PowerPAD is a trademark of Texas Instruments.

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 (24 pages)

PAGE 1
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com 1-A Step Down Converter in 2 x 2 QFN Package Check for Samples: TPS62590 FEATURES DESCRIPTION • • • • • • • The TPS62590 device is a high efficiency synchronous step down converter, optimized for battery powered portable applications. It provides up to 1000-mA output current from batteries, such as single Li-Ion or other common chemistry AA and AAA cells. 1 2 Output Current up to 1000 mA Input Voltage Range from 2.5 V to 5.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com ELECTRICAL CHARACTERISTICS Over full operating ambient temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for condition VIN = EN = 3.6V. External components CIN = 10μF 0603, COUT = 10μF 0603, L = 2.2μH, refer to parameter measurement information.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com PIN ASSIGNMENTS DRV PACKAGE (TOP VIEW) 1 SW MODE FB 2 3 D 6 PA 5 r we 4 Po GND VIN EN TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION VIN 5 PWR VIN power supply pin. GND 6 PWR GND supply pin EN 4 I SW 1 OUT This is the switch pin and is connected to the internal MOSFET switches. Connect the external inductor between this terminal and the output capacitor. FB 3 I Feedback Pin for the internal regulation loop.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION TPS62590DRV VIN VIN L 2.2 mH EN CIN 10mF VOUT SW FB MODE GND PwPd R1 C1 22pF COUT R2 10mF Table 2. List of Components: COMPONENT REFERENCE PART NUMBER MANUFACTURER VALUE CIN GRM188R60J106M Murata 10 μF, 6.3V. X5R Ceramic COUT GRM188R60J106M Murata 10 μF, 6.3V. X5R Ceramic Murata 22 pF, Ceramic Coilcraft 2.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VI = 2.7 V 90 90 VI = 3.6 V 80 60 VI = 3.3 V 70 Efficiency - % Efficiency - % 70 80 VI = 4.5 V VI = 5 V 50 40 30 10 0 0.0001 0.001 0.01 IO - Output Current - A 0.1 0 0.001 1 0.01 0.1 IO - Output Current - A Figure 2. EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 1 100 90 VI = 5 V 80 VI = 4.2 V 70 VI = 3.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 1.9 1.85 VO = 1.8 V, MODE = GND VO = 1.8 V, MODE = VI 1.88 VO - Output Voltage - V VO - Output Voltage - V 1.83 VI = 2.7 V, TA = 25°C 1.81 1.79 VI = 4.5 V, TA = 25°C VI = 3.6 V, TA = 25°C 1.86 PWM Mode PFM Mode, Voltage Positioning On 1.84 1.82 VI = 4.5 V, TA = 25°C VI = 3.6 V, TA = 25°C 1.77 1.8 VI = 2.7 V, TA = 25°C 1.75 0.00001 0.0001 0.001 0.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com PFM LOAD TRANSIENT PFM LINE TRANSIENT VIN 3.6 V, VOUT 1.8 V, IOUT 300 mA to 800 mA, MODE = GND VOUT 100 mV/Div SW 2V/Div VOUT 50 mV/Div VIN 3.6 V, VOUT 1.8 V, IOUT 50 mA to 250 mA, 250 mA MODE = GND IOUT 500 mA/Div 800 mA 300 mA IOUT 200 mA/Div 50 mA Icoil 500 mA/Div Icoil 500 mA/Div Time Base - 20 ms/Div Figure 9. Figure 10. PWM LOAD TRANSIENT PWM LINE TRANSIENT VIN 3.6 V to 4.2 V 500 mV/Div VIN 3.6 V to 4.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com TYPICAL OPERATION – PFM MODE TYPICAL OPERATION – PWM MODE VIN 3.6 V, VOUT 1.8 V, IOUT 150 mA, VOUT 20 mV/Div VOUT 10 mV/Div L 2.2 mH, COUT 10 mF 0603 VIN 3.6 V, VOUT 1.8 V, IOUT 10 mA, SW 2 V/Div L 2.2 mH, COUT 10 mF 0603 SW 2 V/Div Icoil 200 mA/Div Icoil 200 mA/Div Time Base - 10 ms/Div Time Base - 10 ms/Div Figure 13. Figure 14. SHUTDOWN CURRENT INTO VIN vs INPUT VOLTAGE QUIESCENT CURRENT vs INPUT VOLTAGE 0.8 20 0.7 18 0.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com 0.8 High Side Switching 0.7 0.6 o TA = 85 C 0.5 o TA = 25 C 0.4 0.3 0.2 0.1 0 2.5 o TA = -40 C 3 3.5 VIN − Input Voltage − V Figure 17. 10 4 4.5 5 STATIC DRAIN-SOURCE ON-STATE RESISTANCE vs INPUT VOLTAGE RDS(on) - Static Drain-Source On-State Resistance − W RDS(on) - Static Drain-Source On-State Resistance − W STATIC DRAIN-SOURCE ON-STATE RESISTANCE vs INPUT VOLTAGE 0.4 Low Side Switching 0.35 0.3 o TA = 85 C 0.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com DETAILED DESCRIPTION OPERATION The TPS62590 step down converter operates with typically 2.25-MHz fixed frequency pulse width modulation (PWM) at moderate to heavy load currents. At light load currents, the converter can automatically enter Power Save Mode and operates then in PFM mode.
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TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com Output voltage Voltage Positioning Vout +1% PFM Comparator threshold Light load PFM Mode Vout (PWM) moderate to heavy load PWM Mode Figure 19. Power Save Mode Operation 100% Duty Cycle Low Dropout Operation The device starts to enter 100% duty cycle Mode once the input voltage comes close the nominal output voltage. To maintain the output voltage, the High-Side MOSFET switch is turned on 100% for one or more cycles.
PAGE 13
TPS62590 www.ti.com SLVS897B – JANUARY 2009 – REVISED APRIL 2011 ENABLE The device is enabled setting EN pin to high. During the start up time tStart Up the internal circuits are settled. Afterwards, the device activates the soft start circuit. The EN input can be used to control power sequencing in a system with various dc/dc converters. The EN pin can be connected to the output of another converter, to drive the EN pin high and getting a sequencing of supply rails.
PAGE 14
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com APPLICATION INFORMATION L 2.2 mH TPS62590DRV 5 VIN 2.5 V to 5.5 V 4 CIN 10mF 2 VIN SW EN FB MODE GND VOUT =1.8V 1 3 R1 360kΩ Up to 1A C1 22pF R2 180kΩ 6 PwrPAD COUT 10mF Figure 20. TPS62590DRV Adjustable 1.8 V L 2.2 mH TPS62590DRV 5 VIN 3.3 V to 5.5 V 4 CIN 10mF 2 VIN SW EN FB MODE GND PwrPAD VOUT =3.3V 1 3 R1 820kΩ I OUT,max =1A C1 22pF 6 R2 182kΩ COUT 10mF Figure 21. TPS62590DRV Adjustable 3.
PAGE 15
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com V 1 * OUT V DI L + VOUT L I L max + I out max ) IN f DI L (2) 2 (3) With: f = Switching Frequency (2.25MHz typical) L = Inductor Value ΔIL = Peak to Peak inductor ripple current ILmax = Maximum Inductor current A more conservative approach is to select the inductor current rating just for the maximum switch current of the corresponding converter.
PAGE 16
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com Input Capacitor Selection The buck converter has a natural pulsating input current; therefore, a low ESR input capacitor is required for best input voltage filtering and minimizing the interference with other circuits caused by high input voltage spikes. For most applications, a 10-μF ceramic capacitor is recommended. The input capacitor can be increased without any limit for better input voltage filtering.
PAGE 17
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com VOUT R2 GND C1 R1 COUT CIN VIN L G N D U Figure 22.
PAGE 18
TPS62590 SLVS897B – JANUARY 2009 – REVISED APRIL 2011 www.ti.com REVISION HISTORY NOTE: Page numbers of current version may differ from previous versions. Changes from Original (January 2009) to Revision A Page • Deleted "High Efficiency Step-down Converter" from Features ........................................................................................... 1 • Deleted "Adjustable Output Voltage Range from 0.75 V to VIN" from Features .............................................................
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 16-Sep-2010 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 TPS62590DRVR SON DRV 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62590DRVT SON DRV 6 250 179.0 8.4 2.2 2.2 1.2 4.0 8.
PAGE 20
PACKAGE MATERIALS INFORMATION www.ti.com 16-Sep-2010 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62590DRVR SON DRV 6 3000 203.0 203.0 35.0 TPS62590DRVT SON DRV 6 250 203.0 203.0 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.