Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost, Converter/amplifier, Flyback, SEPIC SON 6

VIN5V

10 Hm

VIN SW

GND

CTRL

COMP

4.7 Fm

10nF

TPS 61170

87.6kW

VOUT 12V/300mA

10kW

4.99kW

4.7 Fm

L1: TOKO#A915_Y-100M

C1:MurataGRM188R61A475K

C2:MurataGRM21BR61E475K

D1:

ONsemiMBR0540T1

*R3,C3:CompensationRCnetwork

TPS61170

www.ti.com

SLVS789C – NOVEMBER 2007–REVISED APRIL 2011

1.2A High Voltage Boost Converter in 2x2mm

QFN Package

Check for Samples: TPS61170

FEATURES

DESCRIPTION

• 3-V to 18-V Input Voltage Range

The TPS61170 is a monolithic, high-voltage switching

• High Output Voltage: Up to 38 V

regulator with integrated 1.2-A, 40-V power MOSFET.

• 1.2-A integrated Switch

It can be configured in several standard

switching-regulator topologies, including boost and

• 1.2-MHz Fixed Switching Frequency

SEPIC. The device has a wide input-voltage range to

• 12 V at 300 mA and 24 V at 150 mA from 5-V

support applications with input voltage from multi-cell

Input (Typical)

batteries or regulated 5-V, 12-V power rails.

• Up to 93% Efficiency

The TPS61170 operates at a 1.2-MHz switching

• On-The-Fly Output Voltage Reprogramming

frequency, allowing the use of low-profile inductors

• Skip-Switching Cycle for Output Regulation at

and low-value ceramic input and output capacitors.

Light Load

External loop compensation components give the

user flexibility to optimize loop compensation and

• Built-in Soft Start

transient response. The device has built-in protection

• 6-Pin, 2 mm × 2 mm QFN Package

features, such as pulse-by-pulse overcurrent limit,

soft start and thermal shutdown.

APPLICATIONS

The reference voltage to which the FB pin regulates

• 5-V to 12-V and 24-V, 12-V to 24-V Boost

is 1.229V. The reference voltage can be lowered

Converter

using a 1-wire digital interface (Easyscale™ protocol)

through the CTRL pin. Alternatively, a pulse

• Buck Boost Regulation Using SEPIC Topology

width-modulation (PWM) signal can be applied to the

• ADSL Modems

CTRL pin. The duty cycle of the signal reduces the

feedback reference voltage proportionally.

The TPS61170 is available in a 6-pin 2 mm × 2 mm

QFN package, allowing a compact power-supply

solution.

Figure 1. Typical Application

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 (30 pages)

PAGE 1
TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com 1.2A High Voltage Boost Converter in 2x2mm2 QFN Package Check for Samples: TPS61170 FEATURES 1 • • • • • • • • • • DESCRIPTION 3-V to 18-V Input Voltage Range High Output Voltage: Up to 38 V 1.2-A integrated Switch 1.
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TPS61170 SLVS789C – NOVEMBER 2007 – 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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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com ELECTRICAL CHARACTERISTICS VIN = 3.6 V, CTRL = VIN, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT VI Input voltage range, VIN IQ Operating quiescent current into VIN Device PWM switching no load 3.0 ISD Shutdown current CRTL=GND, VIN = 4.2 V UVLO Under-voltage lockout threshold VIN falling Vhys Under-voltage lockout Hysteresis 2.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 3.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com FUNCTIONAL BLOCK DIAGRAM C2 D1 R1 1 R2 4 L1 FB SW Band Gap Error Amplifer Vin 6 COMP 2 C1 PWM Control R3 5 CTRL C3 Soft Start-up Ramp Generator + Current Sensor Oscillator GND 3 TYPICAL CHARACTERISTICS TABLE OF GRAPHS Circuit of Figure 1, L = TOKO A915_Y-100M, D1 = ONsemi MBR0540T1, unless otherwise noted. FIGURE Efficiency VIN = 5V; VOUT = 12V,18V,24V,30V Figure 2 Efficiency VIN = 5V, 8.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VIN = 5 V VIN = 12 V VOUT = 24 V VOUT = 12 V 90 90 VOUT = 30 V VOUT = 24 V VIN = 5 V 80 Efficiency - % Efficiency - % 80 70 70 60 60 50 50 40 40 0 50 100 150 200 Output Current - mA 250 0 300 50 100 150 200 Output Current - mA 250 Figure 2. Figure 3. OUTPUT VOLTAGE vs INPUT VOLTAGE SWITCH CURRENT LIMIT vs DUTY CYCLE 300 1600 11.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com ERROR AMPLIFIER TRANSCONDUCTANCE vs TEMPERATURE 1600 Switch Current Limit - mA 1500 1400 1300 1200 1100 1000 900 800 -40 -20 0 20 40 60 80 Temperature - °C 100 120 140 Error Amplifier Transconductance - mhos SWITCH CURRENT LIMIT vs TEMPERATURE 500 400 300 200 100 0 -40 -20 0 20 40 60 80 Temperature - °C 100 Figure 6. Figure 7. FB VOLTAGE vs EASY SCALE STEP PWM SWITCHING OPERATION 120 140 1.4 SW 5 V/div 1.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com SKIP-CYCLE SWITCHING SW 5 V/div VOUT 20 mV/div AC IL 50 mA/div t - 400 ns/div Figure 12.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com DETAILED DESCRIPTION OPERATION The TPS61170 integrates a 40-V low side FET for providing output voltages up to 38 V. The device regulates the output with current mode PWM (pulse width modulation) control. The switching frequency of the PWM is fixed at 1.2MHz (typical). The PWM control circuitry turns on the switch at the beginning of each switching cycle.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com FEEDBACK REFERENCE PROGRAM MODE SELECTION The CTRL pin is used for changing the FB pin reference voltage on-the-fly. There are two methods to program the reference voltage, PWM signal and 1 wire interface (EasyScale™). The programming mode is selected each time the device is enabled. The default mode is to use the duty cycle of the PWM signal on the CTRL pin to modulate the reference voltage.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com For optimum performance, use the PWM mode in the range of 5kHz to 100kHz. The requirement of minimum frequency comes from the EasyScale detection delay and detection time specification for the mode selection. The device can mistakenly enter 1 wire mode if the PWM signal frequency is less than 5kHz.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com Table 1. Selectable FB Voltage (continued) FB voltage (mV) D4 D3 D2 D1 D0 10 0.197 0 1 0 1 0 11 0.215 0 1 0 1 1 12 0.234 0 1 1 0 0 13 0.270 0 1 1 0 1 14 0.307 0 1 1 1 0 15 0.344 0 1 1 1 1 16 0.381 1 0 0 0 0 17 0.418 1 0 0 0 1 18 0.455 1 0 0 1 0 19 0.492 1 0 0 1 1 20 0.528 1 0 1 0 0 21 0.565 1 0 1 0 1 22 0.602 1 0 1 1 0 23 0.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com Table 2. EasyScale™ Bit Description (continued) BYTE Data byte BIT NUMBER NAME TRANSMISSION DIRECTION 7 (MSB) RFA 6 A1 0 Address bit 1 5 A0 0 Address bit 0 4 D4 3 D3 2 D2 Data bit 2 1 D1 Data bit 1 0 (LSB) D0 Data bit 0 DESCRIPTION Request for acknowledge.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com The bit detection is based on a Logic Detection scheme, where the criterion is the relation between tLOW and tHIGH. It can be simplified to: High Bit: tHIGH > tLOW, but with tHIGH at least 2x tLOW, see Figure 16. Low Bit: tHIGH < tLOW, but with tLOW at least 2x tHIGH, see Figure 16. The bit detection starts with a falling edge on the CTRL pin and ends with the next falling edge.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com APPLICATION INFORMATION PROGRAM OUTPUT VOLTAGE VOUT R1 TPS61170 FB R2 Figure 17. Program Output Voltage To program the output voltage, select the values of R1 and R2 (See Figure 17) according to Equation 2. æ R1 ö + 1÷ è R2 ø Vout = 1.229 V x ç æ Vout ö - 1÷ è 1.229 V ø R1 = R2 x ç (2) Considering the leakage current through the resistor divider and noise decoupling to FB pin, an optimum value for R2 is around 10k.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com SWITCH DUTY CYCLE The maximum switch duty cycle (D) of the TPS61170 is 90% (min). The duty cycle of a boost converter under continuous conduction mode (CCM) is given by: D + Vout * Vin Vout (5) For a 5V to 12V application, the duty cycle is 58.3%, and for a 5V to 24V application, the duty cycle is 79.2%. The duty cycle must be lower than the maximum specification of 90% in the application; otherwise, the output voltage can not be regulated.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com COMPENSATION CAPACITOR SELECTION The TPS61170 has an external compensation, COMP pin, which allows the loop response to be optimized for each application. The COMP pin is the output of the internal error amplifier. An external resistor R3 and ceramic capacitor C3 are connected to COMP pin to provide a pole and a zero.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com The capacitor in the range of 1μF to 4.7μF is recommended for input side. The output typically requires a capacitor in the range of 1μF to 10μF. The output capacitor affects the loop stability of the boost regulator. If the output capacitor is below the range, the boost regulator can potentially become unstable. The popular vendors for high value ceramic capacitors are: TDK (http://www.component.tdk.com/components.php) Murata (http://www.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com The TPS61170 comes in a thermally enhanced QFN package. This package includes a thermal pad that improves the thermal capabilities of the package. The RθJA of the QFN package greatly depends on the PCB layout and thermal pad connection. The thermal pad must be soldered to the analog ground on the PCB. Using thermal vias underneath the thermal pad as illustrated in the layout example.
PAGE 20
TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com C4 1 mF L1 10 mH VIN 9 V to 15 V C1 4.7 mF L2 10 mH TPS 61170 VIN ON /OFF DIMMING CONTROL D1 VOUT 12 V/ 300 mA C2 4.7 mF R1 87.6 kW SW CTRL FB COMP GND R2 10 kW C3 220 nF L1: TOKO#A915_Y-100M C1: Murata GRM21BR61E475K C2: Murata GRM21BR61E475K D1: ONsemi MBR0540T1 *L1, L2 can be replaced by 1:1 transformer Figure 21. 12V SEPIC (Buck-Boost) Converter L1 22 mH VIN 4.5 V to 15 V C2 1 mF D2 C1 4.
PAGE 21
TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com C3 1 mF VO1 -48 V/30 mA C4 4.7 mF VO2 -24 V/40 mA D2 L1 33 mH VIN 3.3 V D1 C2 1 mF D3 D4 C1 4.7 mF VIN R1 23.7 kW C5 4.7 mF TPS61170 SW VIN CTRL FB 1 kW 1 kW 10 kW COMP GND Q1 10 nF L1: TOKO B992AS-330M C1: Murata GRM188R61A475K C2, C3: Murata GRM21BR71H105K C4, C5: Murata GRM32ER71H475K R2 1.24 kW D1 – D4: B140 Q1: BCM62B Q2: MMBT3904TT1 Q2 Vo2 = 1.23 x (R1/ R2); Vo1 = 2Vo2 Figure 23.
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TPS61170 SLVS789C – NOVEMBER 2007 – REVISED APRIL 2011 www.ti.com REVISION HISTORY NOTE: Page numbers of current version may differ from previous versions. Changes from Revision B (November 2009) to Revision C • 22 Page Changed C1 part number in Figure 19, Figure 21, and Figure 22 from "GRM188RA475K " to "GRM21BR61E475K" .....
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 16-Nov-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 15-Nov-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS61170DRVR Package Package Pins Type Drawing SON DRV 6 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 3000 180.0 8.4 Pack Materials-Page 1 2.3 B0 (mm) K0 (mm) P1 (mm) 2.3 1.15 4.0 W Pin1 (mm) Quadrant 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 15-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS61170DRVR SON DRV 6 3000 210.0 185.0 35.
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