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   

   



SLUS446B – MAY 2000 – REVISED DECEMBER 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 2.5-V to 9-V Input Range

 0.8-V to 8-V Output Range

 Dual-Auto-Mode for High-Efficiency

at Light Loads

 Externally Synchronizable

 0% to 100% Duty Cycle

 Low-Quiescient, Standby,

and Shutdown Currents

 8-Pin SOIC Package

 Four PWM Frequency

Versions (Maximum 2 MHz)

applications

 Cellular Telephones

 Satellite Telephones

 GPS Devices

 Digital Still Cameras

 PDAs and Handheld Cameras

description

The TPS6210x family of low-power high-efficiency buck converters is designed to operate from 1 or 2 li-ion

cell battery packs. This part, with its wide input range of 2.5 V to 9 V, has an adjustable output from 0.8 V to

8 V and is capable of 500-mA output current. The TPS6210x family of synchronizable dc-to-dc converters is

available in four different operating frequencies: 300 kHz, 600 kHz, 1 MHz, and 2 MHz. The circuit can be

allowed to run at a fixed frequency, or sychronized, using the dual function SD/SYNC input pin.

The TPS6210x family is highly efficient at both low and high output currents. The tri-function MODE input pin

is used to select constant-frequency, auto-mode, or light-load modes of operation. The multimode operation

allows the IC to select the most efficient operating mode, or if desirable, the user can determine which of three

modes to operate in. In the auto-mode, the output load detector circuitry determines if the converter should be

running in the constant-frequency, heavy-load mode, or pulsed-variable frequency, light-load mode.

The TPS6210x family also has a shutdown mode for optimum battery shelf life. The IC utilizes three methods

of overload protection, including thermal shutdown and two levels of overcurrent protection. The TPS6210x is

available in the small outline 8-pin SOIC package.

typical application (automatic mode switcher)

UDG–00059

VIN

SD/SYNC

1.0

MODE

AGND

PGND

COMP

LI–ION

113 k

Ω

MLC

36 k

Ω

OUT 3.3 V

TPS62102

30 k

Ω

1 n F

10BQ040

1 k

Ω

100 pF

0 mA TO 500 mA

        

         

       

   

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.

VIN

SD/SYNC

MODE

AGND

PGND

COMP

D PACKAGE

(TOP VIEW)

Summary of content (27 pages)

PAGE 1
1 0 SLUS446B – MAY 2000 – REVISED DECEMBER 2000 applications 2.5-V to 9-V Input Range 0.
PAGE 2
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 AVAILABLE OPTIONS TA PACKAGED DEVICES OPERATING FREQUENCY TA = –40°C 40°C to 85°C SOIC (D) 300 kHz TPS62100D 600 kHz TPS62101D 1 MHz TPS62102D 2 MHz TPS62103D † The D package is available taped and reeled. Add R suffix to device type (e.g. TPS62100DTR) to order quantities of 3000 devices per reel. functional block diagram VIN 1 VREF SOFTSTART SOFTSTART 1.
PAGE 3
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡ VIN input supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 10 V SD/SYNC input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.
PAGE 4
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 electrical characteristics over recommended operating free-air temperature range, TA = –40 C to 85 C, TA = TJ, typical values are at TA = 25 C, VIN = 7.2 V, MODE = 1 (constant frequency), SD/SYNC = 0 V. (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 2.5 7.2 9 V Input Supply Section VIN operating range VIN = 3.6 V, not switching 625 900 µA VIN = 7.
PAGE 5
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 electrical characteristics over recommended operating free-air temperature range, TA = –40 C to 85 C, TA = TJ, typical values are at TA = 25 C, VIN = 7.2 V, MODE = 1 (constant frequency), SD/SYNC = 0 V. (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 225 300 375 kHz Pulse Width Modulator Section TPS62100, SW switching frequency sync frequency Maximum sync.
PAGE 6
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION general information The TPS6210x family of devices are low-power, synchronous buck controllers with integrated FETS. The thrust of these devices is to facilitate the construction of low-cost, small, high-frequency and fast-response dc-to-dc converters that operate from either one or two li-ion cells.
PAGE 7
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION forced variable frequency (MODE = low) In this mode, the chip behaves like a 100-mA current source that is turned on and off as the output voltage falls below or rises above predetermined thresholds. These thresholds are located approximately 1.9% above and below the nominal output voltage. For instance, if the nominal output is 3.
PAGE 8
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION the automatic modes, or the high power and low power modes (MODE = floating) Leaving the MODE pin unconnected or floating lets the chip automatically select one of two operating modes.
PAGE 9
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION shutdown and synchronization The TPS6210x family incorporates a dual function shutdown and synchronization pin. Pulsing the SD/SYNC pin higher than 1 V forces the internal oscillator to reset, allowing synchronization to an external signal source. It is recommended that the part not be synchronized higher than two times its nominal operating frequency.
PAGE 10
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION 200 200 150 Phase 100 100 50 50 Gain 0 Gain – dB Phase – Degrees 150 0 –50 –50 –100 1 10 100 1k 10 k 100 k f – Frequency – Hz 1M 10 M –100 100 M Figure 1.
PAGE 11
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION loop compensation and the TPS6210X series of converters (continued) VOLTAGE-MODE BUCK PWM AND FILTER RESPONSE vs FREQUENCY Open Loop Gain – dB 40 20 0 –20 –40 0 –30 Phase –60 –90 –120 –150 –180 –210 10 100 1k 10 k 100 k 1M f–Frequency – Hz Figure 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11
PAGE 12
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION loop compensation and the TPS6210X series of converters (continued) The circuit shown in Figure 3, implements an origin pole, two zeros and a high frequency pole. A second high frequency pole will be added by the response of the error amplifier. If desired, this additional pole can be controlled by adding a capacitor across the series R–C from COMP to FB.
PAGE 13
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION loop compensation and the TPS6210X series of converters (continued) Note that fz1 is a lower frequency than fz2. It is suggested that a spice or other simulator be used to verify feedback loop characteristics. When doing this modeling, be sure to use an amplifier that has a band limited response.
PAGE 14
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION IL 0 VIN VSW 0 VOUT 0 CHARGE FREEWHEEL FET DIODE DIODE UDG–00052 Figure 5. Typical Constant-Frequency Mode Circuit Waveforms 200mA IL FIXED 200mA PEAK CURRENT 0 ANTICIPATES ZERO CURRENT FOR TURNOFF V IN V SW 0 ZERO CURRENT DETECTIONLEVEL V OUT AVERAGE IOUT IS 100mA MAXIMUM 0 CHARGE FREEWHEEL FET DIODE DIODE UDG–00051 Figure 6.
PAGE 15
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION 200mA IL 0 VSW 815mV VFB 800mV 785mV UDG–00053 NOTE A: Time scale not constant for CF and PFM modes. Figure 7. Constant Frequency To PFM Transition VFB 815mV 800mV 770mV 200mA IL 0 VSW UDG–00054 Figure 8.
PAGE 16
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION design example: automatic-mode switching converter, two li-ion cell input, 3.0-V output Figure 9 shows the schematic of an automatic-mode switching converter based upon the TPS62102. The output current for this design can range from 0 mA to 500 mA. L1 15 µ H OUT 3.3 V 0 mA TO 500 mA TPS62102 1 VIN SW 8 D1 10BQ040 C1 1.
PAGE 17
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 APPLICATION INFORMATION design example: forced constant-frequency mode switching converter, two li-ion cell input, 3.0-V output Figure 10 shows the schematic of a forced constant-frequency mode switching converter based upon the TPS62102. The output current for this design can range from 200 mA to 500 mA. TPS62102 5.0 V TO 8.5 V DC 1 LI ION + L1 4.7 µH VIN SW OUT 3.
PAGE 18
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 FORCED CONSTANT FREQUENCY CONVERTER OPEN LOOP GAIN AND PHASE RESPONSE vs FREQUENCY 100 100 80 80 Open Loop Gain – dB Open Loop Gain – dB AUTOMATIC MODE SWITCHING CONVERTER OPEN LOOP GAIN AND PHASE RESPONSE vs FREQUENCY 60 40 Phase Margin 60 20 0 60 40 20 0 0 0 –30 –30 –60 –60 –90 –90 Phase Phase Phase Margin 63 –120 Gain Margin 18.
PAGE 19
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 design example: forced variable-frequency mode switching converter, two li-ion cell input, 3.0-V output Figure 13 shows the schematic of a forced variable-frequency mode switching converter based upon the TPS62102. The output current for this design can range from 0 mA to 100 mA. L1 22 µH TPS62102 1 LI ION + SW 8 †D1 10BQ040 C1 1.
PAGE 20
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 1.
PAGE 21
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 PARAMETER MEASUREMENT INFORMATION VIN = 7 V VOUT = 3.3 V VIN = 7 V VOUT = 3.3 V VOUT 10 mV/div 250 mA 500 mA VOUT 250 mA 10 mV/div 0 400 1000 1600 500 mA 0 2000 Figure 16. Load Step 250 mA Transition to 500 mA (Circuit Shown in Figure 9.) 400 1000 1600 2000 Figure 17. Load Step 500 mA Transition to 250 mA (Circuit Shown in Figure 9.
PAGE 22
SLUS446B – MAY 2000 – REVISED DECEMBER 2000 TYPICAL CHARACTERISTICS EFFICIENCY vs LOAD CURRENT 100 VIN = 3.6 V VOUT = 3.3 V Efficiency – % 80 Automatic Frequency 60 40 Fixed Frequency 20 0 0.
PAGE 23
PACKAGE OPTION ADDENDUM www.ti.
PAGE 24
PACKAGE OPTION ADDENDUM www.ti.com 30-Jul-2011 Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS62101DR Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.4 B0 (mm) K0 (mm) P1 (mm) 5.2 2.1 8.0 W Pin1 (mm) Quadrant 12.
PAGE 26
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) TPS62101DR SOIC D 8 2500 367.0 367.0 35.
PAGE 27
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.