Datasheet

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FEATURES

DESCRIPTION

APPLICATIONS

1.8Vto3.8V

TPS62510

PGND

2.2 Hm

22 Fm

22pF

300kW

200kW

100nF

Rf1 W

1.5Vto1.5 A

22 Fm

AGND

PVIN

AVIN

OVT

MODE

6 8

0.01 0.1 1 10 10k

100

I -LoadCurrent-mA

Efficiency-%

1k

V =1.2V

V =1.9V

(ModeLow)

V =3.2V

(ModeHigh)

V =2.4V

(ModeHigh)

V =1.9V

(ModeHigh)

V =2.4V

(ModeLow)

V =3.2V

(ModeLow)

TPS62510

www.ti.com

................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009

1.5-A, LOW V

HIGH EFFICIENCY STEP-DOWN CONVERTER

• 1.8-V to 3.8-V Input Voltage Range

• Up to 96% High Efficiency Synchronous

The TPS62510 family are high-efficiency step-down

converters targeted for operation from a 1.8-V to

Step-Down Converter

3.8-V input voltage rail, ideally suited for 2-cell

• 1.5-MHz Fixed Frequency PWM Operation

Alkaline or NiMHd applications. The TPS62510 is

• 1% Output Voltage Accuracy in Fixed

also ideal as a point-of-load regulator running from a

Frequency PWM Mode

fixed 3.3-V, 2.5-V or 1.8-V input voltage rail. The

converter operates in fixed frequency PWM mode

• Power Save Mode Operation for High

switching at 1.5 MHz with the MODE pin high. Pulling

Efficiency Over the Entire Load Current Range

the MODE pin low enables the high efficiency mode.

• 22- µ A Quiescent Current

In high efficiency mode, the device operates with a

• Fixed and Adjustable Output Voltage

1.5 MHz fixed frequency PWM at nominal load

current, and automatically enters the Power Save

• Output Voltage Tracking (OVT) for Reliable

Mode at light load currents. For maximum system

Sequencing

reliability, the converter features Output Voltage

• Available in a 10-Pin QFN (3 x 3 mm) Package

Tracking using the OVT pin to allow sequencing, and

to allow for the output voltage to track an external

voltage applied to this pin.

• Portable Devices (Mobile Phone, PDA)

• 2-Cell NiMHd/Alkaline Applications

• Hard Disc Drives

• Point-Of-Load Regulation

• Notebook Computers

• WiMAX and WLAN Applications

Figure 1. Typical Application Figure 2. Efficiency vs Load Current

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.

2 PowerPAD 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 (25 pages)

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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 1.5-A, LOW VI HIGH EFFICIENCY STEP-DOWN CONVERTER FEATURES 1 • 1.8-V to 3.8-V Input Voltage Range • Up to 96% High Efficiency Synchronous Step-Down Converter • 1.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ 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.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 ELECTRICAL CHARACTERISTICS VIN = 3.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 3.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 FUNCTIONAL BLOCK DIAGRAM PG MODE PVIN Q3 PLL High Side Current Sense 1.5 MHz SawTooth 0.6 V (See Note A) R1 Summing Comparator Q1 VOUT Generator Loop Error Amplifier Compensation EN FB R2 Vref 0.6 V Vref 0.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 NO LOAD QUIESCENT CURRENT vs INPUT VOLTAGE NO LOAD QUIESCENT CURRENT vs INPUT VOLTAGE 30 6 Mode = Low Mode = High 28 5 24 I(q) - Quiescent Current - mA I(q) - Quiescent Current - mA 26 o 85 C 22 o 25 C 20 o -40 C 18 16 14 o 25 C o 85 C 4 o -40 C 3 2 1 12 10 1.6 1.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com LOAD TRANSIENT RESPONSE MODE = HIGH LOAD TRANSIENT MODE = LOW VO (20 mV/div) VO (50 mV/div) IL = 150 mA to 1300 mA IL = 150 mA to 1300 mA (500 mA/div) (500 mA/div) t - Time = 1 ms/div Figure 10. t - Time = 1 ms/div Figure 9.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 POWER SAVE MODE OPERATION SOFT START-UP VO = 1.8 V V(EN) (5 V/div) VO (20 mV/div) V(SW) (2 V/div) VO = 1.8 V (1 V/div) I(AVIN) and I(PVIN) (500 mA/div) IL = 150 mA (500 mA/div) t - Time = 200 ms/div Figure 13. Figure 14.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com FB OFFSET vs VOLTAGE ON VOUT 15 10 25oC o -40 C FB Offset - mV 5 o 85 C 0 -5 OVT £ 0.6 V, VI = 2.4 V, IO = 1 mA -10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 Voltage on OVT - V Figure 17.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 DETAILED DESCRIPTION The TPS62510 has two target areas of operation. The high efficiency area is defined when the MODE pin is held low. In this condition, the converter operates at typically 1.5-MHz fixed frequency PWM (pulse width modulation) at moderate to heavy load currents.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com VI 1.8 V to 3.8 V TPS62510 10 Rf 1 W C1 10 mF 9 6 Cf 100 nF V1 Output of External DC-DC Converter e.g. I/O Rail 5 R3 300 kW 7 1 SW PVIN AVIN FB EN PG L1 2.2 mH V2 1.5 V to 1.5 A C3 22 pF 4 R1 300 kW C2 22 mF 8 OVT AGND MODE PGND R2 200 kW 3 2 R4 200 kW Figure 18.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 If V2 needs to rise after V1, then R4 must be decreased as shown in Figure 21. Voltage V1 V2 R3 R4 > R1 R2 Time Figure 21. V2 Comes Up After V1 Soft Start The converter has an internal soft start circuit that limits the inrush current during start-up.
PAGE 14
TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com Short-Circuit Protection The TPS62510 monitors the forward current through both the high-side and low-side power devices. This enables the converter to limit the short-circuit current, which helps to protect the device and other circuits connected to its output.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 Table 2. Output Capacitor Selection (1) L CO 2.2 µH ≥22 µF (ceramic capacitor) 3.3 µH ≥22 µF (ceramic capacitor) (1) For output currents < 800 mA, a 10-µF output capacitor is sufficient.
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TPS62510 SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com Table 3. Inductor Recommendations Inductor Value Component Supplier Dimensions I(SAT) / R(DC) 2.2 µH Sumida CDRH2D18/HP 4R7 3.2 mm x 3.2 mm x 2 mm 1.6 A / 60 mΩ 2.2 µH Wuerth 744045002 4.5 mm x 3.2 mm x 2.6 mm 1.6 A / 110 mΩ 2.2 µH Sumida CDRH3D14 4 mm x 4 mm x 1.8 mm 1.
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TPS62510 www.ti.com ................................................................................................................................................................ SLVS651A – MAY 2006 – REVISED JULY 2009 APPLICATION INFORMATION Typical Application VI 1.8 V to 3.8 V TPS62510 10 Rf 1 W C1 22 mF Cf 100 nF 9 6 5 7 PVIN SW AVIN FB EN PG OVT AGND MODE PGND 1 VO 1.5 V to 1.5 A L1 2.2 mH 4 C3 22 pF R1 300 kW C2 22 mF 8 R2 200 kW 3 2 Figure 23.
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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 14-Jul-2012 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 TPS62510DRCR SON DRC 10 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPS62510DRCR SON DRC 10 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPS62510DRCT 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 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62510DRCR SON DRC 10 3000 367.0 367.0 35.0 TPS62510DRCR SON DRC 10 3000 367.0 367.0 35.0 TPS62510DRCT SON DRC 10 250 210.0 185.0 35.0 TPS62510DRCT SON DRC 10 250 210.0 185.0 35.
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