Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Holder VQFN 40

N/C

EN_PSV

TON

VOUT

TRIP

V5IN

VBST

N/C

VOUT_DS

V5FILT

VFB

PGOOD

TPS51315

GND

PGND

GND

PGND

VIN

1 2 3 4 5 6 7 8 9 10 11 12

32 31 30 29 28 27 26 25 24 23 22 21

R5R3

ENSW

C4C3

PGOOD

5 V

OUT

3 V to 14 V

UDG-08154

Not Recommended for New Designs

TPS51315

www.ti.com

SLUS881B –MAY 2009–REVISED AUGUST 2012

10-A STEP-DOWN SYNCHRONOUS SWITCHER WITH INTEGRATED MOSFETs

Check for Samples: TPS51315

FEATURES

APPLICATIONS

• Input Voltage Range: 3 V to 14 V

• Portable Device Application

• Output Voltage Range: 0.75 V to 5.5 V • Notebook Computers

• Integrated Power MOSFETs with 10-A • Server and Desktop

Continuous Current Output

DESCRIPTION

• < 5-μA Shutdown Current

The TPS51315 is a D-CAP™ Mode, 10-A,

• D-CAP™ Mode with Fast Transient Response

synchronous step-down converter with integrated

• Programmable Switching Frequency with

MOSFETs. The combination of D-CAP™ mode and

External Resistor From 100 kHz to 1 MHz

on-board MOSFETs provides fast transient response

performance with ease of use, less external

• Selectable Auto-Skip or PWM-Only Operation

component count and small footprint. Externally

• < 1% Initial Reference Accuracy

adjustable switching frequency allows optimal design

• Internal Soft-Start Control

between component size and efficiency tradeoff.

• Integrated Boost Diode

Ceramic output capacitors can be employed by

adding a few extra components. The TPS51315 is

• Power Good Signal

available in the thermally-efficient 40-pin, 5 mm x

• Adjustable Overcurrent Limit via External

7 mm, QFN package and is specified from -40°C to

Resistor

85°C ambient.

• OVP/UVP/UVLO Protection

• Integrated Selectable Output Discharge

• Prebias Output Voltage Start-Up with Disabled

Output Discharge

• Thermal Shutdown

• 40-Pin QFN Package with Exposed Thermal

Pad

• Supports All Ceramic Output Capacitors

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.

2D-CAP 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 (32 pages)

PAGE 1
Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 10-A STEP-DOWN SYNCHRONOUS SWITCHER WITH INTEGRATED MOSFETs Check for Samples: TPS51315 FEATURES APPLICATIONS • • • • • • 1 2 • • • • • • • • • • • • • • • Input Voltage Range: 3 V to 14 V Output Voltage Range: 0.75 V to 5.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 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
Not Recommended for New Designs TPS51315 www.ti.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com ELECTRICAL CHARACTERISTICS over recommended free-air temperature range (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX 0 1 UNIT SUPPLY CURRENT IV5IN V5IN supply current V5IN current, TA = 25°C, No Load, EN_PSV = 5V, VVFB = 0.75 V, VLL = 0.5 V IV5FILT V5FILT supply current V5FILT current, TA = 25°C, No Load, VEN_PSV = 5 V, VVFB = 0.75 V, LL = 0.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 ELECTRICAL CHARACTERISTICS (continued) over recommended free-air temperature range (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX UNIT PG in from lower (PGOOD goes high), TA = 25°C 92.5% 95% 97.5% PG Low hysteresis (PGOOD goes low) –4.5% –5.5% –6.5% PG in from higher (PGOOD goes high), TA = 25°C 102.5% 105% 107.5% PG High hysteresis (PGOOD goes low) 4.5% 5.5% 6.5% 2.5 7.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com PIN DESCRIPTIONS PIN NAME I/O DESCRIPTION NO. EN_PSV 34 I Enable/power-save pin. Connect to ground to disable switched-mode power supply (SMPS ). Connect to 3.3 V or 5 V to turn on SMPS and enable skip mode. Float to turn on SMPS but disable skip mode (forced continuous conduction mode). I Signal ground pin.
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Not Recommended for New Designs TPS51315 www.ti.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com FUNCTIONAL BLOCK DIAGRAM +5/10% –30/20% + UV PGOOD + Delay Delay + –5/10% Control Logic + OV +15/10% 0.75 V SS VFB UVP/OVP Logic TON V5IN + + VBST PWM VIN 10uA GND ISHOT + OCP LL TRIP + LL PGND XCON V5IN + ZC/ + UCP UCP Buzz Logic PGND LL GND 5V 2.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 DETAILED DESCRIPTION Dual PWM Operations The primary control loop of the switched-mode power supply (SMPS) functions as an adaptive on-time pulse width modulation (PWM) controller. It supports a proprietary D-CAP™ mode.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com PWM Frequency and Adaptive On Time Control TPS51315 employs an adaptive on-time control scheme and does not include a dedicated oscillator on the device. However, the device runs with pseudo-constant frequency by feed-forwarding the input voltage and output voltage to the on-time, one-shot timer.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 Overcurrent Limit The TPS51315 has cycle-by-cycle overcurrent limit function. The inductor current is monitored during the OFF state using the low-side FET RDS(on) which is 7 mΩ (typ). The controller maintains the OFF state and does not release next ON cycle until the detected current comes down to the overcurrent trip level set by the TRIP resister.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com TYPICAL CHARACTERISTICS At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted. V5FILT SHUTDOWN CURRENT vs JUNCTION TEMPERATURE 800 8 700 7 IV5FILT_SHDN - Shutdown Current - mA IV5FILTPWM - Supply Current - mA PWM SUPPLY CURRENT vs JUNCTION TEMPERATURE 600 500 400 300 200 100 0 -50 0 50 100 TJ - Junction Temperature - ºC 4 3 2 1 Figure 2.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 TYPICAL CHARACTERISTICS (continued) At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com TYPICAL CHARACTERISTICS (continued) At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted. OUTPUT VOLTAGE vs INPUT VOLTAGE OUTPUT VOLTAGE vs INPUT VOLTAGE 2.54 1.07 2.52 VOUT – Output Voltage – V VOUT – Output Voltage – V 1.06 2.50 2.48 1.05 2.46 2.44 1.04 ILOAD (A) ILOAD (A) 2.42 0 10 0 10 VOUT = 1.05 V 2.40 1.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 TYPICAL CHARACTERISTICS (continued) At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted. EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VOUT = 2.5 V 90 90 80 80 h – Efficiency – % h – Efficiency – % VOUT = 1.05 V 70 60 70 60 VIN (V) VIN (V) 3.3 5.0 12.0 12.6 50 3.3 5.0 12.0 12.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com TYPICAL CHARACTERISTICS (continued) At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted. EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VIN = 12 V 90 90 80 80 h – Efficiency – % h – Efficiency – % VIN = 12 V 70 60 70 60 VOUT (V) 1.05 1.2 1.8 3.3 50 40 0.001 0.01 0.1 1 VOUT (V) 1.1 1.5 2.5 5.0 50 10 40 0.001 IOUT – Output Current – A 0.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 TYPICAL CHARACTERISTICS (continued) At VIN = 12 V, VV5IN = 5 V, RT(on) = 237 kΩ, and TA = 25°C, unless otherwise noted. VOUT (500 mV/div) VOUT (500 mV/div) LL (10 V/div) LL (10 V/div) IOUT (10 A/div) IOUT (10 A/div) t – Time – 500 ms/div t – Time – 500 ms/div Figure 21. 1.05-V Start-Up Waveforms (Light Load)X X X VOUT (20 mV/div) Figure 22. 1.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com APPLICATION INFORMATION Loop Compensation and External Parts Selection Switching Modulator VIN R1 Lx VFB R2 PWM + + Control Logic and Divider IL IC IO 0.75 V ESR RL Voltage Divider VC CO Output Capacitor UDG-09062 Figure 25. Simplified Modulator Block Diagram The feedback voltage (VVFB) is compared to the internal reference voltage after the divider resistors.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 External Component Selection External component selection is a simple process in D-CAP™ Mode. 1. Determine the value of R1 and R2. The recommended R2 value is 10 kΩ to 100 kΩ. Calculate R1 by using Equation 8. R1 = VOUT - 0.75 ´ R2 0.75 (8) 2.
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Not Recommended for New Designs TPS51315 SLUS881B – MAY 2009 – REVISED AUGUST 2012 www.ti.com 5. Choose an RTRIP value. Select an appropriate RTRIP value with the considerations shown in Equation 14. Maximum RTRIP should be less than 12.1 kΩ. RTRIP = IOUT(max ) ´ 7mW ITRIP(min ) (14) 6. V5FILT input capacitor.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 Figure 26. Typical 1.
PAGE 22
Submit Documentation Feedback Product Folder Links: TPS51315 EN_VREG5 EN5 EN3 4 5 V3IN VREG3 6 7 8 VIN C3 10 mF 1 mF VIN C4 ENSW R4 R7 4.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 R1 301 kW ENSW R4 20 kW R3 8.06 kW D1 32 31 30 29 28 27 26 25 24 23 22 21 TRIP V5IN VBST N/C LL LL LL LL LL LL LL LL R2 12.1 kW L1 1 mF LL 20 33 N/C 34 EN_PSV LL 19 35 TON LL 18 36 VOUT LL 17 VOUT 1.8 V C1 330 mF LL 16 TPS51315 VOUT VFB 40 PGOOD VIN 14 PGND PGND VIN VIN VIN 13 PGND R6 100 kW VIN 12 V PGND C5 0.
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Not Recommended for New Designs TPS51315 3 V to 14 V VIN C1 PGND PGOOD 11 10 9 8 7 PGOOD 5V C3 R7 R4 C4 R3 ENSW C6 R2 R6 40 VFB 39 GND V5FILT GND 38 12 C2 GND VOUT_DS 6 TRIP PGND 37 5 V5IN TPS51315 PGND VOUT 4 VBST PGND 36 3 N/C PGND N/C 2 LL PGND 33 1 VIN 13 VIN 14 VIN 15 LL 16 LL 17 LL 18 TON 27 LL 28 35 26 LL 29 LL 19 25 LL 30 EN_PSV 24 LL 31 34 23 LL 32 LL 20 22 LL VIN PGND R8 L1 21 LL R1 VIN C5 UDG-08173 www.ti.
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Not Recommended for New Designs TPS51315 www.ti.com SLUS881B – MAY 2009 – REVISED AUGUST 2012 REVISION HISTORY Changes from Original (MAY 2009) to Revision A • Page Changed pinout to reflect correct placement of Pin 1 registration mark .............................................................................. 7 Changes from Revision A (MAY 2011) to Revision B • Page Changed ESD HBM rating from "1.5 kV" to "2.0 kV" (typographical error) ............................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 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 TPS51315RGFR VQFN RGF 40 3000 330.0 16.4 5.25 7.25 1.45 8.0 16.0 Q1 TPS51315RGFT VQFN RGF 40 250 180.0 16.4 5.25 7.25 1.45 8.0 16.0 Q1 TPS51315RGFT VQFN RGF 40 250 180.0 16.4 5.25 7.25 1.45 8.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS51315RGFR VQFN RGF 40 3000 367.0 367.0 38.0 TPS51315RGFT VQFN RGF 40 250 210.0 185.0 35.0 TPS51315RGFT VQFN RGF 40 250 210.0 185.0 35.
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