The REG710 is a switched capacitor voltage converterthat produces a regulated, low-ripple output voltage from an unregulated input voltage

REG710-25

Manufacturer Part NumberREG710-25
DescriptionThe REG710 is a switched capacitor voltage converterthat produces a regulated, low-ripple output voltage from an unregulated input voltage
ManufacturerTexas Instruments
REG710-25 datasheet
 


Specifications of REG710-25

Iout(max)(a)0.03Iq(typ)(ma)0.065
Switching Frequency(max)(khz)1000Vin(min)(v)1.8
Vin(max)(v)5.5Vout(min)(v)2.5
Vout(max)(v)2.5Preset Vout(v)2.5
Efficiency(typ)(%)90TopologyBuck-Boost
Operating Temperature Range(c)-40 to 85Pin/package6SOT-23
Regulated Outputs(#)1  
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www.ti.com...........................................................................................................................................
60mA, 5.0V, Buck/Boost Charge Pump
FEATURES
1
Wide Input Range: 1.8V to 5.5V
2
Automatic Step-Up/Step-Down Operation
Low Input Current Ripple
Low Output Voltage Ripple
Minimum Number of External
Components—No Inductors
1MHz Internal Oscillator Allows Small
Capacitors
Shutdown Mode
Thermal and Current Limit Protection
Six Output Voltages Available:
– 5.5V, 5.0V, 3.3V, 3.0V, 2.7V, 2.5V
Small Packages:
– SOT23-6
– TSOT23-6
(REG71055
and
– TQFN-6 (2×2×0.8mm;
REG71050
Evaluation Modules Available:
– REG710EVM-33,
REG710EVM-5
APPLICATIONS
Smart Card Readers
SIM Card Supplies
Cellular Phones
Portable Communication Devices
Personal Digital Assistants
Notebook and Palm-Top Computers
Modems
Electronic Games
Handheld Meters
PCMCIA Cards
Card Buses
White LED Drivers
LCD Displays
Battery Backup Supplies
1
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.
All trademarks are the property of their respective owners.
2
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.
in ThinSOT-23 and ThinQFN
DESCRIPTION
The REG710 is a switched capacitor voltage
converter that produces a regulated, low-ripple output
voltage from an unregulated input voltage. A wide
input supply voltage of 1.8V to 5.5V makes the
REG710 ideal for a variety of battery sources, such
as single-cell Li-Ion, or two- and three-cell nickel- or
alkaline-based chemistries.
The input voltage may vary above and below the
output voltage and the output remains in regulation. It
works
equally
applications without the need for an inductor,
providing low EMI dc/dc conversion. The high
switching
surface-mount capacitors, saving board space and
reducing cost. The REG710 is thermally protected
and current limited, protecting the load and the
regulator during fault conditions. Typical ground pin
current (quiescent current) is 65 A with no load, and
REG71050
Only)
less than 1 A in shutdown mode.
Only)
Enable
3.3V to
4.2V
REG710 Used in White LED Backlight Application
REG710
SBAS221G – DECEMBER 2001 – REVISED JANUARY 2009
well
for
step-up
or
step-down
frequency
allows
the
use
of
C
PUMP
0.22 F
m
REG71050
REG710-5
R
R
C
C
IN
OUT
2.2 F
2.2 F
m
m
GND
LED
LED
Copyright © 2001–2009, Texas Instruments Incorporated
small
R
LED

REG710-25 Summary of contents

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    ... A wide input supply voltage of 1.8V to 5.5V makes the REG710 ideal for a variety of battery sources, such as single-cell Li-Ion, or two- and three-cell nickel- or alkaline-based chemistries. The input voltage may vary above and below the output voltage and the output remains in regulation ...

  • Page 2

    ... For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. (2) Voltage is marked on reel. Add on row with the following data: Product: REG71050DRV Output Voltage: 5.0V Package-Lead: TQFN Package Designator: DRV Specified Temp range: -40C to +85C Package marking: CFF Ordering Number: REG71050DRVT (Tape and ...

  • Page 3

    ... Enable C PUMP- TQFN (TOP VIEW PUMP+ OUT Enable IN C GND 3 4 PUMP- SIMPLIFIED BLOCK DIAGRAM C PUMP 0. REG710 Control & 3 Thermal 2 GND Product Folder Link(s): REG710 REG710 V OUT C OUT 2 Submit Documentation Feedback 3 ...

  • Page 4

    ... V ≤ 5.5V OUT IN I ≤ 30mA, 2.0V ≤ V ≤ 5.5V OUT IN I ≤ 10mA, 1.8V ≤ V ≤ 5.5V OUT IN I ≤ 30mA, 2.0V ≤ V ≤ 5.5V OUT 10mA 1.8V, REG710-3.3 OUT 30mA OUT V = 1. 0mA OUT V = 1.8V to 5.5V, Enable = SOT23-6 ...

  • Page 5

    ... +25° 0.75V OUT OUT EFFICIENCY REG710-5, REG71050 80 REG710-3.3 70 REG710 REG710-2.5 REG710-2 1.5 2.0 2.5 3.0 3.5 4.0 V (V) IN Figure 1. EFFICIENCY vs LOAD CURRENT (REG710-3. OUT 40 30 0.1 1 Load Current (mA) Figure 3. EFFICIENCY vs LOAD CURRENT (REG710-2.7V ...

  • Page 6

    ... BW = 20MHz OUTPUT VOLTAGE DRIFT HISTOGRAM 100 120 140 ° Product Folder Link(s): REG710 www.ti.com = 1.3V, unless otherwise ENABLE LOAD TRANSIENT RESPONSE Time (10 s/div) m Figure 8. LINE TRANSIENT RESPONSE W Buck Mode Time (50 s/div) m Figure 10. V Drift (ppm/ C) ° ...

  • Page 7

    ... REG710-3. 2. 332W L 0 1.5 2 100mA/div REG710-2 OUT 2V/div REG710-3 20MHz OUT 4.5 5.0 5.5 6.0 OUTPUT RIPPLE VOLTAGE vs V (REG710-2.5V, 3V, 5V) REG710 2 OUT REG710-5 REG71050 REG710-2.5 C OUT OUT REG710-5 REG71050 C OUT REG710-3 C REG710-2. OUT 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4 ...

  • Page 8

    ... OFF C PUMP (A) Figure 19. Simplified Schematic of the REG710 Operating in the Step-Up or Boost Mode 8 Submit Documentation Feedback 2009........................................................................................................................................... THEORY OF OPERATION During the second half cycle the FET switched are configured as shown added to V PUMP regulated by skipping clock cycles as necessary. ...

  • Page 9

    ... With light loads or higher input voltage, a smaller 0.1 F pump capacitor (C and output capacitors (C can be used. To minimize output voltage ripple, increase the output capacitor, C larger. The capacitors listed in REG710. This table is only a representative list of compatible parts. Table 1. Suggested Capacitors DIELECTRIC VALUE TOLERANCE 2.2 F ±10% 0.22 F ± ...

  • Page 10

    ... Table 2. Operating Mode Change versus V OPERATING MODE PRODUCT CHANGES AT V REG710-2.5 REG710-2.7 REG710-3 REG710-3.3 REG710-5, REG71050, Step-up only REG71055 10 Submit Documentation Feedback 2009........................................................................................................................................... LAYOUT Large transient currents flow in the V GND traces. To minimize both input and output ripple, keep the capacitors as close as possible to the regulator using short, direct circuit traces ...

  • Page 11

    ... REG710 Figure 22. REG710 Circuit for Step-Up Operation from 1.8V to 5.0V with 10mA Output Current + - Figure 23. REG710 Circuit for Doubling the Output Current 3.3V to 4.2V Figure 24. REG710 Circuit for Driving LEDs Copyright © 2001–2009, Texas Instruments Incorporated SBAS221G – DECEMBER 2001 – REVISED JANUARY 2009 APPLICATION CIRCUITS 0 ...

  • Page 12

    ... REG710 SBAS221G – DECEMBER 2001 – REVISED JANUARY V V £ IN OUT 2.2mF Figure 25. REG710 with Negative Bias Supply 12 Submit Documentation Feedback 2009........................................................................................................................................... 0.22mF OUT REG710-3.3 2.2mF EN GND 2.2mF 74HC04 5818 5818 2.2mF Copyright © 2001–2009, Texas Instruments Incorporated ...

  • Page 13

    ... REG71050DRVT ACTIVE SON REG71050DRVTG4 ACTIVE SON REG71055DDCR ACTIVE SOT REG71055DDCRG4 ACTIVE SOT REG71055DDCT ACTIVE SOT REG71055DDCTG4 ACTIVE SOT REG710NA-2.5/250 ACTIVE SOT-23 REG710NA-2.5/250G4 ACTIVE SOT-23 REG710NA-2.5/3K ACTIVE SOT-23 REG710NA-2.5/3KG4 ACTIVE SOT-23 REG710NA-2.7/250 ACTIVE SOT-23 Pins Package Qty (2) Eco Plan ...

  • Page 14

    ... ACTIVE SOT-23 REG710NA-3/250 ACTIVE SOT-23 REG710NA-3/250G4 ACTIVE SOT-23 REG710NA-3/3K ACTIVE SOT-23 REG710NA-3/3KG4 ACTIVE SOT-23 REG710NA-5/250 ACTIVE SOT-23 REG710NA-5/250G4 ACTIVE SOT-23 REG710NA-5/3K ACTIVE SOT-23 REG710NA-5/3KG4 ACTIVE SOT-23 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. ...

  • Page 15

    ... TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold Customer on an annual basis. OTHER QUALIFIED VERSIONS OF REG71055 : Automotive: REG71055-Q1 • ...

  • Page 16

    ... SOT DDC REG71055DDCT SOT DDC REG710NA-2.5/250 SOT-23 DBV REG710NA-2.5/3K SOT-23 DBV REG710NA-2.7/250 SOT-23 DBV REG710NA-3.3/250 SOT-23 DBV REG710NA-3.3/3K SOT-23 DBV REG710NA-3/250 SOT-23 DBV REG710NA-3/3K SOT-23 DBV REG710NA-5/250 SOT-23 DBV REG710NA-5/3K SOT-23 DBV PACKAGE MATERIALS INFORMATION Pins ...

  • Page 17

    ... REG71050DRVT SON REG71050DRVT SON REG71055DDCR SOT REG71055DDCT SOT REG710NA-2.5/250 SOT-23 REG710NA-2.5/3K SOT-23 REG710NA-2.7/250 SOT-23 REG710NA-3.3/250 SOT-23 REG710NA-3.3/3K SOT-23 REG710NA-3/250 SOT-23 REG710NA-3/3K SOT-23 REG710NA-5/250 SOT-23 REG710NA-5/3K SOT-23 PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DDC 6 3000 ...

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    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...