Datasheet

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100

0.01

0.1

100

1000

h – Efficiency – %

V =2.7V

V =3V

V =3.6V

V =4.5V

V =1.8V

MODE=GND

L =2.2 H

DCR110mR

OUT

I – OutputCurrent – mA

OUT

GND

TPS62560DRV

10 F

OUT

4.7 F

2.2 Hm

22pF

V =2.5Vto5.5V

Upto600mA

MODE

TPS62560, TPS62561

TPS62562

www.ti.com

SLVS815C –JANUARY 2008–REVISED DECEMBER 2009

2.25-MHz, 600-mA Step-Down Converter in TSOT and 2 × 2 × 0.8-mm QFN Package

Check for Samples: TPS62560, TPS62561, TPS62562

FEATURES

DESCRIPTION

• Output Current up to 600 mA

The TPS62560 device is a high efficiency

synchronous step down converter, optimized for

• V

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

• Typical 15-μA Quiescent Current

single Li-Ion or other common chemistry AA and AAA

• 100% Duty Cycle for Lowest Dropout cells.

• Soft Start

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

device is targeted to power a large variety of portable

• Available in a Small TSOT, and

handheld equipment or POL applications.

2 mm × 2 mm × 0.8 mm QFN Package

• For Improved Features Set, see TPS62260

The TPS62560 family operates at 2.25-MHz fixed

switching frequency and enters a Power Save Mode

operation at light load currents to maintain a high

APPLICATIONS

efficiency over the entire load current range.

• PDAs, Pocket PCs, Portable Media Players

• Low-Power DSP Supply The Power Save Mode is optimized for low output

voltage ripple. For low noise applications, the device

• POL Applications

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 TPS62560 allows the use of small inductors and

capacitors to achieve a small solution size.

TPS62560 and TPS62562 are available in a 2-mm ×

2-mm, 6-terminal QFN package, whereas the

TPS62561 is available in a 5-terminal TSOT23

package.

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 (31 pages)

PAGE 1
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 2.25-MHz, 600-mA Step-Down Converter in TSOT and 2 × 2 × 0.8-mm QFN Package Check for Samples: TPS62560, TPS62561, TPS62562 FEATURES DESCRIPTION • • • • • • • The TPS62560 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.
PAGE 2
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 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.
PAGE 3
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 ELECTRICAL CHARACTERISTICS Over full operating ambient temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for condition VIN = EN = 3.6 V. External components CIN = 4.7 μF 0603, COUT = 10 μF 0603, L = 2.2 μH; see the Parameter Measurement Information section. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VIN Input voltage range IOUT Output current 2.5 VIN 2.
PAGE 4
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com PIN ASSIGNMENTS DDC PACKAGE TSOT23-5 (TOP VIEW) VIN 1 5 DRV PACKAGE SON-6 (TOP VIEW) SW SW MODE GND 6 GND 2 Thermal 5 Pad VIN 3 EN 2 FB EN 1 3 4 4 FB Figure 1. PIN FUNCTIONS PIN No. QFN-6 No. TSOT23-5 I/O DESCRIPTION EN 4 3 I This is the enable terminal of the device. Pulling this terminal to low forces the device into shutdown mode. Pulling this terminal to high enables the device.
PAGE 5
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 FUNCTIONAL BLOCK DIAGRAM VIN CurrentLimit Comparator Thermal Shutdown VIN Undervoltage Lockout 1.8 V Limit High Side EN PFM Comparator +1% Voltage positioning Reference 0.6 V VREF FB VREF +1% Only in 2x2SON MODE MODE Softstart VOUT RAMP CONTROL Error Amplifier Control Stage Gate Driver AntiShoot-Through SW1 VREF Integrator FB FB PWM Comp. Zero-Pole Amp. Limit Low Side RI 1 RI3 RI..N Int.
PAGE 6
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS Table 1. Table of Graphs FIGURE η Efficiency Typical Operation Mode Transition vs Output Current, VOUT = 1.8 V, Power Save Mode, MODE = GND Figure 2 vs Output Current, VOUT = 1.8 V, PWM Mode, MODE = VIN Figure 3 vs Output Current, VOUT = 3.3 V, PWM Mode, MODE = VIN Figure 4 vs Output Current, VOUT = 3.
PAGE 7
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 EFFICIENCY (Power Save Mode) vs OUTPUT CURRENT EFFICIENCY (Forced PWM Mode) vs OUTPUT CURRENT 100 100 90 90 VIN = 2.7 V 80 VIN = 2.7 V VIN = 3.6 V 70 h – Efficiency – % h – Efficiency – % 80 V = 3 V IN VIN = 4.5 V 60 50 40 30 10 0 0.01 VIN = 3 V 60 VIN = 3.6 V VIN = 4.5 V 50 40 30 VOUT = 1.8 V MODE = GND L = 2.2 mH DCR 110 mR 20 70 VOUT = 1.8 V MODE = VIN L = 2.2 mH 20 10 0 0.
PAGE 8
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com EFFICIENCY (Forced PWM Mode) vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 90 90 VIN = 2.7 V 80 80 60 h − Efficiency − % h − Efficiency − % VIN = 4.5 V 70 VIN = 4.5 V 50 VIN = 3.6 V 40 VOUT = 1.2 V MODE = VIN L = 2 mH MIPSA2520 COUT = 10 mF 0603 30 20 10 10 100 VIN = 3.6 V 60 50 VIN = 2.7 V 40 30 VOUT = 1.2 V MODE = GND L = 2 mH MIPSA2520 COUT = 10 mF 0603 20 10 0 1 70 1000 0 0.01 0.
PAGE 9
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 MODE TERMINAL TRANSITION FROM PWM TO PFM MODE AT LIGHT LOAD MODE 2 V/Div VIN = 3.6 V VOUT = 1.8 V IOUT = 10 mA SW 2 V/Div START-UP TIMING EN 2 V/Div VIN = 3.6 V RLoad = 10 Ω VOUT = 1.8 V IIN into CIN MODE = GND SW 2 V/Div PFM Mode Forced PWM Mode VOUT 2 V/Div ICOIL 200 mA/Div IIN 100 mA/Div Time Base - 100 ms/Div Time Base - 2.5 ms/Div Figure 10. Figure 11.
PAGE 10
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 LOAD TRANSIENT (Forced PFM Mode To PWM Mode) www.ti.com LOAD TRANSIENT (Forced PWM Mode To PFM Mode) SW 2 V/Div SW 2 V/Div VIN 3.6 V VOUT 1.5 V IOUT 150 mA to 400 mA VOUT 50mV/Div MODE = GND 400 mA IOUT 500 mA/Div VIN 3.6 V VOUT 1.5 V IOUT 150 mA to 400 mA MODE = GND VOUT 50 mV/Div 400 mA IOUT 500 mA/Div 150 mA 150 mA ICOIL500 mA/Div ICOILl 500mA/Div Time Base – 500 ms/Div Time Base – 500 ms/Div Figure 14.
PAGE 11
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 LOAD TRANSIENT (PFM Mode To PWM Mode) SW 2 V/Div LOAD TRANSIENT (PFM Mode To PWM Mode) SW 2 V/Div VIN 3.6 V VOUT 1.5 V IOUT 50 mA to 400 mA MODE = GND VOUT 50 mV/Div VIN 3.6 V VOUT 1.8 V IOUT 50 mA to 250 mA MODE = GND VOUT 50 mV/Div PWM Mode PFM Mode 250 mA 400 mA IOUT 500 mA/Div IOUT 200 mA/Div 50 mA 50 mA ICOIL 500 mA/Div ICOIL 500mA/Div Time Base – 20 ms/Div Time Base – 20 ms/Div Figure 18.
PAGE 12
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com LINE TRANSIENT (PWM Mode) TYPICAL OPERATION (PFM Mode) VOUT 20 mV/Div VIN 3.6V to 4.2V 500 mV/Div SW 2 V/Div VOUT = 1.8 V 50 mV/Div IOUT = 250 mA MODE = GND ICOIL 200 mA/Div Time Base – 10 ms/Div Time Base – 100ms/Div Figure 22. Figure 23. TYPICAL OPERATION (PFM Mode) QUIESCENT CURRENT vs INPUT VOLTAGE 20 VIN 3.6 V; VOUT 1.8 V, IOUT 10 mA, L = 4.
PAGE 13
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 STATIC DRAIN-SOURCE ON-STATE RESISTANCE vs INPUT VOLTAGE STATIC DRAIN-SOURCE ON-STATE RESISTANCE vs INPUT VOLTAGE 0.8 0.4 High-Side Switching 0.7 0.6 o TA = 85 C 0.5 TA = 25oC 0.4 0.3 0.2 o TA = −40 C 0.1 0 2 2.5 3 3.5 4 4.5 5 RDS(on) − Static Drain-Source On-State Resistance − W RDS(on) − Static Drain-Source On-State Resistance − W www.ti.com Low-Side Switching 0.35 0.3 TA = 85oC 0.25 o TA = 25 C 0.2 0.15 0.
PAGE 14
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com DETAILED DESCRIPTION OPERATION The TPS62560/62 step-down converters operate 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 then operates in PFM mode. However, the TPS62561 operates with fixed-frequency PWM only, also at light load conditions.
PAGE 15
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 Output voltage Voltage Positioning Vout +1% PFM Comparator threshold Light load PFM Mode Vout (PWM) moderate to heavy load PWM Mode Figure 28. Power Save Mode Operation With Automatic Mode Transition 100% Duty-Cycle Low-Dropout Operation The device starts to enter 100% duty-cycle mode once the input voltage comes close to the nominal output voltage.
PAGE 16
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com ENABLE The device is enabled by setting the EN terminal to high. During the start-up time tStart Up, the internal circuits are settled and the soft-start circuit is activated. The EN input can be used to control power sequencing in a system with various dc/dc converters. The EN terminal can be connected to the output of another converter, to drive the EN terminal high to achieve a sequencing of the given supply rails.
PAGE 17
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 APPLICATION INFORMATION TPS62560DRV VIN = 2.5 V to 5.5 V VIN CIN 4.7 mF VOUT = 1.2 V SW R1 360 kW EN GND L1 2.2 mH C1 22 pF COUT 10 mF FB R2 360 kW MODE S0364_01 Figure 29. TPS62560 Adjustable 1.2-V Output TPS62560DRV VIN = 2.5 V to 5.5 V VIN CIN 4.7 mF VOUT = 1.5 V Up to 600 mA SW R1 540 kW EN GND L1 2.2 mH C1 22 pF COUT 10 mF FB R2 360 kW MODE S0365-01 Figure 30. TPS62560 Adjustable 1.
PAGE 18
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com OUTPUT VOLTAGE SETTING For adjustable output voltage versions, the output voltage can be calculated as: æ R ö VOUT = VREF ´ ç 1+ 1 ÷ è R2 ø with an internal reference voltage VREF, typically 0.6 V. To minimize the current through the feedback divider network, R2 should be 180 kΩ or 360 kΩ. The sum of R1 and R2 should not exceed ~1 MΩ, to keep the network robust against noise.
PAGE 19
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 A more conservative approach is to select the inductor current rating just for the switch current limit ILIMF of the converter. Accepting larger values of ripple current allows the use of lower inductance values, but results in higher output voltage ripple, greater core losses, and lower output current capability.
PAGE 20
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com LAYOUT CONSIDERATIONS Figure 32.
PAGE 21
TPS62560, TPS62561 TPS62562 www.ti.com SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 VOUT R2 GND C1 R1 COUT CIN VIN L G N D U Figure 33. Suggested Layout for Adjustable-Output-Voltage Version As for all switching power supplies, the layout is an important step in the design. Proper function of the device demands careful attention to PCB layout. Care must be taken in board layout to get the specified performance.
PAGE 22
TPS62560, TPS62561 TPS62562 SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009 www.ti.com Changes from Original (January 2008) to Revision A • Page Changed at all levels. Revision A is a complete rewrite of this data sheet. ......................................................................... 1 Changes from Revision A (July 2008) to Revision B • Page Added TPS62562 device number. .........................................................................................................................
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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.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 16-Sep-2010 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62560DRVR SON DRV 6 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62560DRVT SON DRV 6 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62561DDCR SOT DDC 5 3000 179.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 TPS62561DDCT SOT DDC 5 250 179.
PAGE 26
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) TPS62560DRVR SON DRV 6 3000 203.0 203.0 35.0 TPS62560DRVT SON DRV 6 250 203.0 203.0 35.0 TPS62561DDCR SOT DDC 5 3000 203.0 203.0 35.0 TPS62561DDCT SOT DDC 5 250 203.0 203.0 35.0 TPS62562DRVR SON DRV 6 3000 203.0 203.0 35.0 TPS62562DRVT 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.