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Details, datasheet, quote on part number:SN0304078
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Datasheet text preview:
SN0304078
SBAS284A - JUNE 2003 - REVISED AUGUST 2003
60mA Switched Cap Buck/Boost Converter
FEATURES D D D D D
Pb-free SOT23-6 Package Wide Input Range: 2.7V to 5.5V Low Input Current Ripple Low Output Voltage Ripple Minimum Number of External ComponentsNo Inductors Capacitors
DESCRIPTION
The SN0304078 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 2.7V to 5.5V makes the SN0304078 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 will remain in regulation. The SN0304078 provides low EMI dc/dc conversion without the need for an inductor. The high switching frequency allows the use of small surface-mount capacitors, saving board space and reducing cost. The SN0304078 is thermally protected and current limited, protecting the load and the regulator during fault conditions. Typical ground pin current (quiescent current) is 65µA with no load, and less than 1µA in shutdown mode.
D 1MHz Internal Oscillator Allows Small D Shutdown Mode D Thermal and Current Limit Protection APPLICATIONS D D D D D D D D D D D D D D
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
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.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
www.ti.com
SN0304078
www.ti.com SBAS284A - JUNE 2003 - REVISED AUGUST 2003
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage . . . . . . . . . . . Enable Input . . . . . . . . . . . . Output Short-Circuit Duration . . Operating Temperature Range . Storage Temperature Range . . Junction Temperature . . . . . . . Lead Temperature (soldering, 3s)
. . . . . . . . . . . . . . . . -0.3V to +6.0V . . . . . . . . . . . . . . . . . -0.3V to VIN . . . . . . . . . . . . . . . . . . . Indefinite . . . . . . . . . . . . . . -55°C to +125°C . . . . . . . . . . . . . . -65°C to +150°C . . . . . . . . . . . . . . -55°C to +150°C . . . . . . . . . . . . . . . . . . . +260°C
ELECTROSTATIC DISCHARGE SENSITIVITY
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.
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability.
PACKAGE ORDERING INFORMATION
PRODUCT OUTPUT VOLTAGE 5.0V PACKAGE-LEAD PACKAGE DESIGNATOR(1) DBV SPECIFIED TEMPERATURE RANGE -40°C to +85°C PACKAGE MARKING(2) R10B ORDERING NUMBER SN0304078DBVT SN0304078DBVR TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 3000
SN0304078DBV
SOT23-6
(1) For the most current specifications and product information, refer to our web site at www.ti.com. (2) Voltage will be marked on reel.
PIN CONFIGURATION
Top View TSOT23/SOT23
SIMPLIFIED BLOCK DIAGRAM
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SN0304078
www.ti.com SBAS284A - JUNE 2003 - REVISED AUGUST 2003
ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range, TA = -405C to +855C
At TA = +25°C, VIN = VOUT/2 + 0.75V, IOUT = 10mA, CIN = COUT = 2.2µF, CPUMP = 0.22µF, VENABLE = 1.3V, unless otherwise noted. SN0304078NA PARAMETER INPUT VOLTAGE Tested Startup OUTPUT VOLTAGE IOUT 10mA, 2.7V VIN 5.5V IOUT 30mA, 3.0V VIN 5.5V IOUT 60mA, 3.3V VIN 4.2V OUTPUT CURRENT Nominal Short Circuit(1) OSCILLATOR FREQUENCY(2) EFFICIENCY(3) RIPPLE VOLTAGE(4) ENABLE CONTROL Logic High Input Voltage Logic Low Input Voltage Logic High Input Current Logic Low Input Current THERMAL SHUTDOWN Shutdown Temperature Shutdown Recovery SUPPLY CURRENT (Quiescent Current) In Shutdown Mode TEMPERATURE RANGE Specification Ambient Temperature Operating Ambient Temperature Storage Ambient Temperature Thermal Resistance, qJA TA TA TA SOT23-6 -40 -55 -65 200 +85 +125 +150 °C °C °C °C/W IOUT = 0mA VIN = 2.7V to 5.5V, Enable = 0V 65 0.01 100 1 µA µA 160 140 °C °C IOUT = 10mA, VIN = 2.7V IOUT = 30mA VIN = 2.7V to 5.5V 1.3 -0.2 VIN 0.4 100 100 V V nA nA 30 100 1.0 90 35 mA mA MHz % mVPP 4.7 4.7 4.6 5.0 5.0 5.0 5.3 5.3 5.4 V V V CONDITIONS See conditions under Output Voltage with a resistive load not lower than typical VOUT/IOUT. MIN TYP MAX UNITS
2.7
5.5
V
(1) The supply current is twice the output short-circuit current. (2) The converter regulates by enabling and disabling periods of switching cycles. The switching frequency is the oscillator frequency during an active period. (3) See efficiency curves for other VIN/VOUT configurations. (4) Effective Series Resistance (ESR) of capacitors is < 0.1.
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