Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost VSON 10

ActualSize

3mmx3mm

FEATURES

APPLICATIONS

DESCRIPTION

MODE

AGND

COMP

PGND

Cby

1 F

16V

Cin

10 F

16V

2.5Vto6V

3.3 Hm

PMEG2010AEH

12V

156kW

18kW

Cout

2*10 F

25V

Rcomp

68kW

Ccomp

820pF

Css

100nF

TPS61086

www.ti.com

................................................................................................................................................................................................ SLVSA05 – AUGUST 2009

18.5 V PFM/PWM STEP-UP DC-DC CONVERTER WITH 2.0 A SWITCH

• 2.3 V to 6.0 V Input Voltage Range

• Handheld Devices

• 18.5 V Boost Converter With 2.0 A Switch

Current

• GPS Receiver

• Digital Still Camera

• 1.2 MHz Switching Frequency

• Portable Applications

• Power Save Mode for improved Efficiency at

• DSL Modem

Low Output Power or Forced PWM

• PCMCIA Card

• Adjustable Soft-Start

• TFT LCD Bias Supply

• Thermal Shutdown

• Undervoltage Lockout

• 10-Pin QFN Package

The TPS61086 is a high frequency, high efficiency DC to DC converter with an integrated 2.0 A, 0.13 Ω power

switch capable of providing an output voltage up to 18.5 V. The implemented boost converter is based on a fixed

frequency of 1.2MHz, pulse-width-modulation (PWM) controller that allows the use of small external inductors

and capacitors and provides fast transient response.

At light load, the device can operate in Power Save Mode with pulse-frequency-modulation (PFM) to improve the

efficiency while keeping a low output voltage ripple. For very noise sensitive applications, the device can be

forced to PWM Mode operation over the entire load range by pulling the MODE pin high. The external

compensation allows optimizing the application for specific conditions. A capacitor connected to the soft-start pin

minimizes inrush current at startup.

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 (26 pages)

PAGE 1
TPS61086 Actual Size 3 mm x 3 mm www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 18.5 V PFM/PWM STEP-UP DC-DC CONVERTER WITH 2.0 A SWITCH FEATURES 1 • • • • • • • • APPLICATIONS 2.3 V to 6.0 V Input Voltage Range 18.5 V Boost Converter With 2.0 A Switch Current 1.
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TPS61086 SLVSA05 – AUGUST 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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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 ELECTRICAL CHARACTERISTICS VIN = 3.3 V, EN = IN, VS = 12 V, 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 2.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com PIN ASSIGNMENT DRC PACKAGE (TOP VIEW) COMP SS FB EN MODE Thermal Pad IN AGND SW PGND SW 10-PIN 3mm x 3mm x 1mm QFN TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION COMP 1 I/O FB 2 I Feedback pin EN 3 I Shutdown control input.
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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 The typical characteristics are measured with the inductor CDRH6D12 3.3 µH from Sumida and the rectifier diode SL22.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com PFM MODE - LIGHT LOAD FORCED PWM MODE - LIGHT LOAD VSW 10 V/div VSW 10 V/div VS_AC 50 mV/div VS_AC 50 mV/div Il 0.5 A/div Il 0.5 A/div VIN = 3.3 V, VS = 12 V/4 mA VIN = 3.3 V, VS = 12 V/4 mA 100 µs/div 100 µs/div Figure 5. Figure 6.
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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 LOAD TRANSIENT RESPONSE PFM MODE VS_AC 50 mV/div LOAD TRANSIENT RESPONSE FORCE PWM MODE VS_AC 100 mV/div Rcomp = 16 kΩ Ccomp = 2.7 nF COUT = 40 µF L = 3.3 µH IOUT 50 mA/div Rcomp = 16 kΩ Ccomp = 2.7 nF COUT = 40 µF L = 3.3 µH IOUT 50 mA/div VIN = 3.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com FREQUENCY vs LOAD CURRENT FREQUENCY vs SUPPLY VOLTAGE 1600 1400 MODE = VIN Forced PWM L = 3.3 µH 1400 1200 MODE = VIN Forced PWM L = 3.3 µH 1000 f - Frequency - kHz f - Frequency - kHz 1200 1000 800 600 400 VIN = 3.
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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 DETAILED DESCRIPTION VIN VS EN SS IN SW MODE SW Current limit and Soft Start Toff Generator AGND Bias Vref = 1.24 V UVLO Thermal Shutdown Ton PWM Generator Gate Driver of Power Transistor COMP GM Amplifier FB Vref PGND Figure 17.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com Design Procedure The first step in the design procedure is to verify that the maximum possible output current of the boost converter supports the specific application requirements.
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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 determining the efficiency. Especially for a boost converter where the inductor is the energy storage element, the type and core material of the inductor influences the efficiency as well. Usually an inductor with a larger form factor gives higher efficiency.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com Setting the Output Voltage The output voltage is set by an external resistor divider. Typically, a minimum current of 50 µA flowing through the feedback divider gives good accuracy and noise covering. A standard low side resistor of 18 kΩ is typically selected.
PAGE 13
TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 Output Capacitor Selection For best output voltage filtering a low ESR output capacitor like ceramic capcaitor is recommended. Two to four 10 µF ceramic output capacitors (or two 22 µF) work for most of the applications.
PAGE 14
TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com For additional flexibility, it is possible to switch from Power Save Mode to Forced PWM Mode during operation. This allows efficient power management by adjusting the operation of the converter to the specific system requirements.
PAGE 15
TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 APPLICATION INFORMATION L 3.3 µH VIN 3.3 V ± 20% 8 Cin 10 µF 16 V Cby 1 µF 16 V 3 9 4 5 IN SW EN SW MODE FB AGND COMP PGND SS VS 12 V/50 mA D PMEG2010AEH 6 R1 156 kΩ 7 Cout 2*10 µF 25 V 2 R2 18 kΩ 1 Rcomp 68kΩ 10 Css 100 nF TPS61086 Ccomp 1.
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TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com Riso 10 kW L 3.
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TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 TFT LCD APPLICATION T2 BC850B 3·Vs VGL -7 V/20 mA T1 BC857B -Vs R8 6.8 kΩ C13 1 µF/ 35 V C16 470 nF/ 50 V C14 470 nF/ 25 V D4 BAV99 C15 470 nF/ 50 V D3 BAV99 C18 470 nF/ 50 V R10 13 kΩ 2·Vs C17 470 nF/ 50 V D2 BAV99 D8 BZX84C7V5 Vgh 26.
PAGE 18
TPS61086 SLVSA05 – AUGUST 2009 ................................................................................................................................................................................................ www.ti.com WHITE LED APPLICATIONS L 3.3 µH optional Cby 1 µF/ 16 V VIN 3.
PAGE 19
TPS61086 www.ti.com ................................................................................................................................................................................................ SLVSA05 – AUGUST 2009 L 3.3 µH optional VIN 3.
PAGE 20
PACKAGE OPTION ADDENDUM www.ti.com 7-Sep-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TPS61086DRCR ACTIVE SON DRC 10 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TPS61086DRCT ACTIVE SON DRC 10 250 CU NIPDAU Level-2-260C-1 YEAR Green (RoHS & no Sb/Br) Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 21
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 TPS61086DRCR SON DRC 10 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPS61086DRCT SON DRC 10 250 180.0 12.4 3.3 3.3 1.1 8.0 12.
PAGE 22
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) TPS61086DRCR SON DRC 10 3000 367.0 367.0 35.0 TPS61086DRCT SON DRC 10 250 210.0 185.0 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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.