REG71055IDDCRQ1

REG71055-Q1 www.ti.com....................................................................................................................................................................................................... SBAS477 – JULY 2009 30-mA 5.5-V BOOST CHARGE PUMP FEATURES 1 • • • • • • Qualified for Automotive Applications Input Voltage Range: 3.0 V to 5.5 V Automatic Step-Up Operation Low Input Current Ripple Low Output Voltage Ripple Minimum Number of External Components, No Inductors • • • • • 1-MHz Internal Oscillator Allows Small Capacitors Shutdown Mode Thermal and Current Limit Protection 5.5-V Output Voltage Small TSOT23-6 (DDC) Package DESCRIPTION The REG71055 is a switched capacitor voltage converter that produces a regulated, low-ripple output voltage from an unregulated input voltage. Input supply voltage of 3.0 V to 5.5 V makes the REG71055 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 below the output voltage and the output remains in regulation. It works equally well for step-up applications without the need for an inductor, providing low EMI dc/dc conversion. The high switching frequency allows the use of small surface-mount capacitors, saving board space and reducing cost. The REG71055 is thermally protected and current limited, protecting the load and the regulator during fault conditions. Typical ground pin current (quiescent current) is 65 µA with no load, and less than 1 µA in shutdown mode. CPUMP 0.22mF Enable REG71055 3.3V to 4.2V CIN 2.2mF R R R LED LED LED COUT 2.2mF GND White LED Backlight Application 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. 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. Copyright © 2009, Texas Instruments Incorporated REG71055-Q1 SBAS477 – JULY 2009....................................................................................................................................................................................................... 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. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION (1) PACKAGE (2) TA –40°C to 85°C (1) (2) TSOT-23 – DDC ORDERABLE PART NUMBER Reel of 3000 REG71055IDDCRQ1 TOP-SIDE MARKING GIXI 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. Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. DDC PACKAGE (TOP VIEW) VOUT 1 6 CPUMP+ GND 2 5 VIN Enable 3 4 CPUMP- SIMPLIFIED BLOCK DIAGRAM CPUMP 0.22 µF 4 VIN 6 5 REG71055 CIN 2.2 µF 1 VOUT COUT 2.2 µF Control & Enable 3 Thermal 2 GND 2 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): REG71055-Q1 REG71055-Q1 www.ti.com....................................................................................................................................................................................................... SBAS477 – JULY 2009 ABSOLUTE MAXIMUM RATINGS (1) VIN Supply voltage VEN Enable input voltage tSC Output short-circuit duration Indefinite TSTG Storage temperature range –65°C to 150°C TLEAD Lead temperature (soldering, 10 seconds) (1) 3 V to 6 V –0.3 V to VIN 260°C Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range, TA = –40°C to 85°C TA = 25°C, VIN = VOUT/2 + 0.75 V, IOUT = 10 mA, CIN = COUT = 2.2 µF, CPUMP = 0.22 µF, and VENABLE = 1.3 V (unless otherwise noted) PARAMETER Input voltage, tested startup Output voltage TEST CONDITIONS MIN See conditions under Output Voltage with a resistive load no lower than typical VOUT/IOUT 3.0 IOUT ≤ 10 mA, 3.0 V ≤ VIN ≤ 5.5 V 5.2 IOUT ≤ 30 mA, 3.25 V ≤ VIN ≤ 5.5 V 5.2 Nominal output current TYP MAX UNIT 5.5 V 5.5 5.8 V 5.5 5.8 V 30 mA Short-circuit output current (1) 100 mA Oscillator frequency (2) 1.0 MHz 90 % Efficiency (3) Ripple voltage IOUT = 10 mA, VIN = 3.0 V (4) IOUT = 30 mA 35 mVPP Logic high input voltage, Enable VIN = 3.0V to 5.5 V 1.3 VIN V Logic low input voltage, Enable VIN = 3.0V to 5.5 V –0.2 0.4 V Logic high input current, Enable VIN = 3.0V to 5.5 V 100 nA Logic low input current, Enable VIN = 3.0V to 5.5 V 100 nA Thermal shutdown temperature 160 Thermal shutdown recovery 140 Quiescent current (5) IOUT = 0 mA, VIN = 5.5 V Quiescent current in shutdown mode Specified ambient temperature TA Thermal resistance θJA (1) (2) (3) (4) (5) °C 65 VIN = 3.0 V to 5.5 V, Enable = 0 V 0.01 –40 TSOT23-6 °C 100 µA 1 µA 85 °C 220 °C/W The supply current is twice the output short-circuit current. The converter regulates by enabling and disabling periods of switching cycles. The switching frequency is the oscillator frequency during an active period. See efficiency curves for other VIN/VOUT configurations. Effective series resistance (ESR) of capacitors is < 0.1Ω. Measured when the device is not switching. Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): REG71055-Q1 3 REG71055-Q1 SBAS477 – JULY 2009....................................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS TA = 25°C, VIN = VOUT/2 + 0.75 V, IOUT = 5 mA, CIN = COUT = 2.2 µF, CPUMP = 0.22 µF, and VENABLE = 1.3 V (unless otherwise noted) SUPPLY CURRENT vs TEMPERATURE (No Load) EFFICIENCY vs VIN 100 90 80 Supply Current (mA) Efficiency (%) 80 70 60 50 60 40 20 40 30 1.5 2.0 2.5 3.0 3.5 VIN (V) 4.0 4.5 5.0 0 -40 -30 -20 -10 0 5.5 10 20 30 40 50 60 70 80 90 Temperature (°C) Figure 1. Figure 2. LOAD TRANSIENT RESPONSE SUPPLY CURRENT vs TEMPERATURE (Not Enabled) 20 18 VOUT 10mA/div 16 Supply Current (nA) 20mV/div 14 12 10 8 6 4 ILOAD 2 BW = 20MHz 0 -40 -30 -20 -10 0 Time (10ms/div) 10 20 30 40 50 60 70 80 90 Temperature (°C) Figure 3. Figure 4. OUTPUT VOLTAGE vs TEMPERATURE OUTPUT VOLTAGE DRIFT HISTOGRAM 25 0.1 Percentage of Units (%) Output Voltage Change (%) 0.2 0.0 -0.1 -0.2 -0.3 -0.4 20 15 10 5 > 100 < 100 < 76 < 52 < 28 140