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TPS62111

EfficiencyvsOutputCurrent

100

0.0001 0.001 0.01 0.1 10

I -OutputCurrent- A

Efficiency-%

5V

4.2V

12V

8.4V

V =3.3V

PFMMode

=25 C

SYNC

GND PGND

=3.3V

6.8 Hm

C =22 F

6.3V

VIN

LBI

C =10 F

25V

1 Fm

V =3.8Vto17V

VIN

VINA

PGNDGND PwPD

AGND

TPS62111

LBO

1MW

TPS62110, TPS62111

TPS62112, TPS62113

www.ti.com

SLVS585C –JULY 2005–REVISED OCTOBER 2012

17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER

Check for Samples: TPS62110, TPS62111, TPS62112, TPS62113

FEATURES

DESCRIPTION

The TPS6211x devices are a family of low-noise

• High-Efficiency Synchronous Step-Down

synchronous step-down dc-dc converters that are

Converter With up to 95% Efficiency

ideally suited for systems powered from a 2 to 4-cell

• 3.1-V to 17-V Operating Input Voltage Range

Li-ion battery or from a 12-V or 15-V rail.

• Adjustable Output Voltage Range From

The TPS6211x is a synchronous PWM converter with

1.2 V to 16 V

integrated N- and P-channel power MOSFET

• Fixed Output Voltage Options Available in

switches. Synchronous rectification is used to

3.3 V and 5 V

increase efficiency and to reduce external component

count. To achieve highest efficiency over a wide load-

• Synchronizable to External Clock Signal up to

current range, the converter enters a power-saving,

1.4 MHz

pulse-frequency modulation (PFM) mode at light load

• Up to 1.5-A Output Current

currents. Operating frequency is typically 1 MHz,

• High Efficiency Over a Wide Load-Current

allowing the use of small inductor and capacitor

values. The device can be synchronized to an

Range Due to PFM/PWM Operation Mode

external clock signal in the range of 0.8 MHz to

• 100% Maximum Duty Cycle for Lowest

1.4 MHz. For low-noise operation, the converter can

Dropout

be operated in PWM-only mode. In the shutdown

• 20-µA Quiescent Current (Typical)

mode, the current consumption is reduced to less

than 2 µA. The TPS6211x is available in the 16-pin

• Overtemperature and Overcurrent Protected

(RSA) QFN package, and operates over a free-air

• Available in 16-Pin QFN Package

temperature range of –40°C to 85°C.

APPLICATIONS

• Point-of-Load Regulation From 12-V Bus

• Organizers, PDAs, and Handheld PCs

• Handheld Scanners

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
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER Check for Samples: TPS62110, TPS62111, TPS62112, TPS62113 FEATURES DESCRIPTION • The TPS6211x devices are a family of low-noise synchronous step-down dc-dc converters that are ideally suited for systems powered from a 2 to 4-cell Li-ion battery or from a 12-V or 15-V rail.
PAGE 2
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 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
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 ELECTRICAL CHARACTERISTICS VI = 12 V, VO = 3.3 V, IO = 600 mA, EN = VI, TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT VI Input voltage range I(Q) 3.1 Operating quiescent current IO = 0 mA, SYNC = GND, VI = 7.2 V, TA = 25°C (1) IO = 0 mA, SYNC = GND, VI = 17 V IQ(LBI) Quiescent current with enhanced LBI comparator version (TPS62113 only).
PAGE 4
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VI = 12 V, VO = 3.
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TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 DEVICE INFORMATION PGND SW SW PG PIN ASSIGNMENT TOP VIEW 2 3 4 16 15 14 13 12 Exposed Thermal Pad 11 10 5 6 7 8 9 GND GND FB AGND VINA 1 SYNC LBO LBI PGND VIN VIN EN TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION AGND 9 I Analog ground, connect to GND and PGND EN 4 I Enable.
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TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.
PAGE 7
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 Table of Graphs FIGURE Efficiency vs Output current (5 V) Efficiency vs Output current (3.3 V) 1, 2 Maximum output current vs Input voltage Efficiency vs Output current (1.8 V) 7, 8 Efficiency vs Output current (1.
PAGE 8
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com Typical Characteristics (continued) TPS62111 EFFICIENCY vs OUTPUT CURRENT TPS62111 EFFICIENCY vs OUTPUT CURRENT 100 100 90 90 4.2 V 80 80 70 Efficiency - % Efficiency - % 4.2 V 8.4 V 60 5V 50 12 V 40 30 5V 70 60 8.4 V 50 12 V 40 30 VO = 3.3 V o TA = 25 C PWM Mode 20 10 0 0.0001 0.001 0.01 0.1 1 VO = 3.3 V o TA = 25 C PFM Mode 20 10 0 0.0001 10 0.001 0.
PAGE 9
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 Typical Characteristics (continued) TPS62110 EFFICIENCY vs OUTPUT CURRENT TPS62110 EFFICIENCY vs OUTPUT CURRENT 100 100 90 90 80 4.2 V 80 5V 70 60 Efficiency - % Efficiency - % 4.2 V 8.4 V 5V 50 12 V 40 30 8.4 V 60 50 40 12 V 30 VO = 1.8 V o TA = 25 C PWM Mode 20 10 0 0.0001 70 0.001 0.01 0.1 1 VO = 1.8 V o TA = 25 C PFM Mode 20 10 0 0.0001 10 0.001 IO - Output Current- A Figure 7.
PAGE 10
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com Typical Characteristics (continued) TPS62111 LINE TRANSIENT TPS62111 LOAD TRANSIENT VI = 8.4 V VO = 3.3 V ILOAD = 150 mA to 1350 mA TA = 25°C VI = 5 V/div VO = 50 mV/div VO = 50 mV/div IO = 500 mA/div VI = 7.2 V to 12 V VO = 3.3 V ILOAD = 800 mA o TA = 25 C t − Time = 20 µs/div Figure 12. t - Time = 2 ms/div Figure 11. TPS62111 OUTPUT RIPPLE VI = 8.4 V, VO = 3.
PAGE 11
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 Typical Characteristics (continued) SWITCHING FREQUENCY vs INPUT VOLTAGE QUIESCENT CURRENT vs INPUT VOLTAGE 1000 50 VO = 12 V IO = 100 mA 45 o 85 C 40 980 Quiescent Current - mA Switching Frequency - kHz 990 o 970 25 C 960 o -40 C 950 940 930 35 30 20 910 5 4 5 6 0 7 8 9 10 11 12 13 14 15 16 17 VI - Input Voltage - V Figure 15.
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TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com DETAILED DESCRIPTION OPERATION The TPS6211x is a synchronous step-down converter that operates with a 1-MHz fixed-frequency pulse-width modulation (PWM) at moderate-to-heavy load currents and enters the power-save mode at light load current. During PWM operation, the converter uses a unique fast-response voltage-mode control scheme with inputvoltage feedforward.
PAGE 13
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 1.6% 0.8% VO (nominal) –1.6% t Figure 18. Power-Save Mode Output-Voltage Thresholds The typical PFM (SKIP) current threshold for the TPS6211x is given by: VI ISKIP » 25 W (1) Equation 1 is valid for input voltages up to 7 V. For higher voltages, the skip current threshold is not increased further. The converter enters the fixed-frequency PWM mode as soon as the output voltage falls below VO – 1.6% (nominal).
PAGE 14
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com ENABLE A logic low on EN forces the TPS6211x into shutdown. In shutdown, the power switch, drivers, voltage reference, oscillator, and all other functions are turned off. The LBO pin is high impedance, while PG is held low. The supply current is reduced to less than 2 µA in the shutdown mode.
PAGE 15
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 When the LBI is used to supervise the battery voltage and shut down the TPS6211x at low-input voltages, the battery voltage rises when its current drops to zero. The implemented hysteresis on the LBI pin may not be sufficient for all types of batteries. Figure 19 shows how an additional external hysteresis can be implemented. See SLVA373 for details. 6.8 mH VI = 4.
PAGE 16
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com Table 1. Advantages and Disadvantages When Designing the Inductor and Output Capacitor INFLUENCE ON STABILITY ADVANTAGE DISADVANTAGE Less output voltage ripple Increase Cout (>22 µF) Uncritical Decrease Cout (<22 µF) Critical Increase inductor value > 6.
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TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 Table 2. List of Inductors MANUFACTURER Coilcraft PART NO. INDUCTANCE DC RESISTANCE MSS6132-682 6.8 µH 65 mΩ (max) SATURATION CURRENT 1.5 A HA3808-AL 6.8 µH 99 mΩ (typ) 4.4A Epcos B82462G4682M 6.8 µH 50 mΩ (max) 1.5 A Sumida CDRH5D28-6R2 6.2 µH 33 mΩ (typ) 1.8 A SLF6028T-6R8M1R5 6.8 µH 35 mΩ (typ) 1.5 A SLF7032T-6R8M1R6 6.8 µH 41 mΩ (typ) 1.6 A 7447789006 6.8 µH 44 mΩ (typ) 2.
PAGE 18
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com FEEDFORWARD-CAPACITOR SELECTION The feedforward capacitor (Cff) is needed to compensate for parasitic capacitance from the feedback pin to GND. Typically, a value of 4.7 pF to 22 pF is needed for an output voltage divider with a equivalent resistance (R1 in parallel with R2) in the 150-kΩ range. The value can be chosen based on best transient performance and lowest output-voltage ripple in PFM mode.
PAGE 19
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 Figure 20.
PAGE 20
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com APPLICATION INFORMATION 6.8 mH VI = 3.5 V to 17 V 2 TPS62110 VIN VIN EN 3 4 SW SW 15 R3 1 MW R5 8 CI = 10 mF 25 V PG VINA 1 mF 9 AGND 7 5 R6 6 FB 10 11 Cff 10 pF R1 220 kW CO = 2 x 22 mF 6.3 V (See Note A) R2 390 kW SYNC ET Pad PGND PGND GND GND A. R4 1 MW 13 LBO LBI VO = 1.8 V 14 1 12 16 For an output voltage lower than 2.
PAGE 21
TPS62110, TPS62111 TPS62112, TPS62113 www.ti.com SLVS585C – JULY 2005 – REVISED OCTOBER 2012 6.8 mH VI = 9.3 V to 17 V 2 3 4 8 CI = 10 mF 25 V TPS62110 VIN VIN EN 9 5 VO = 9 V 14 1 MW PG VINA 1 mF 7 AGND 13 LBO 6 FB 10 LBI Cff 11 12 22 pF R1 680 kW CO = 33 mF 16 V (See Note A) R2 100 kW SYNC GND GND A. SW SW 15 ET Pad PGND PGND 1 16 For an output voltage greater than 5 V, an output capacitor of 33 μF minimum is required for stability. Figure 23.
PAGE 22
TPS62110, TPS62111 TPS62112, TPS62113 SLVS585C – JULY 2005 – REVISED OCTOBER 2012 www.ti.com REVISION HISTORY Changes from Revision A (February 2009) to Revision B Page • Changed Description text From: 2-cell Li-ion battery To: 2 to 4-cell Li-ion battery.. ............................................................ 1 • Changed the TPS6211 Output Voltage From: 3.3 V To: Fixed 3.3 V ..................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined.
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PACKAGE MATERIALS INFORMATION www.ti.com 29-Oct-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62110RSAR QFN RSA 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 TPS62110RSAT QFN RSA 16 250 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 TPS62111RSAR QFN RSA 16 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 29-Oct-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62110RSAR QFN RSA 16 3000 367.0 367.0 35.0 TPS62110RSAT QFN RSA 16 250 210.0 185.0 35.0 TPS62111RSAR QFN RSA 16 3000 367.0 367.0 35.0 TPS62111RSAT QFN RSA 16 250 210.0 185.0 35.0 TPS62112RSAR QFN RSA 16 3000 367.0 367.0 35.0 TPS62112RSAR QFN RSA 16 3000 367.0 367.0 35.
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