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WirelessDevNet.com Press Release
TI Introduces Dual-Voltage Level 200-mA LDO for Handheld Devices
DALLAS (Oct. 11, 2007) – Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the first dual-level 200-mA low-dropout (LDO) linear regulator with simple dynamic voltage scaling in a tiny, five-ball chip-scale package. The flexibility of this device benefits applications that require two levels of output voltage regulation for programming of eFUSE or SIM cards with additional memory, such as wireless handsets, PDAs, smart phones, MP3 players and other handheld devices. See: www.ti.com/tps728185315-pr.
TI’s new TPS728185315 LDO features a very low dropout of 230 mV with an input voltage range of 2.7 V to 6.5 V and fixed output voltages between 0.9 V and 3.6 V. The LDO also comes with EEPROM preset voltage options of 1.85 V and 3.15 V. The LDO enables the designer to set switchable voltages for eFUSE and SIM cards, such as a higher voltage for fuse programming or with detection of the SIM card, and a lower voltage at the end of programming. The designer can switch between two voltages in a finite amount of time without over and undershoots. Dynamic voltage scaling also helps reduce leakage currents in sub-micron multimillion transistor processors used extensively in portable applications, such as TI’s ultra-low power MSP430 microcontrollers.
An integrated precision bandgap and error amplifier provides an overall 2.5 percent accuracy over load, line and temperature extremes. The TPS728185315 provides a high power-supply rejection ratio (PSRR) over a wide frequency range of up to 1 MHz, fast 160 µs start-up time and excellent line and load transient response. The device is fully specified over a temperature range of -40º C to 125º C.
Key Features of the TPS728185315:
Dual 200-mA LDO regulator
Available in multiple fixed-output voltage combinations from 0.9 V to 3.6 V, using factory EEPROM programming
VSET pin toggles output voltage between two preset levels
Preset output voltage levels can be EEPROM-programmed to any combination
High PSRR: 65 dB at 1-kHz
Two-and-a-half percent accuracy over line, load and temperature
Stable with a 1.0-μF ceramic capacitor
Thermal shutdown and over-current protection
Low IQ: 50 μA in active mode
Low dropout: 230 mV at 200 mA
Pricing and Availability
The TPS728185315 LDO is available today in volume from TI and its authorized distributors. The device comes in a 1 mm x 1.4 mm x 0.6 mm, 5-ball WCSP and 6-pin, 2 mm x 2 mm SON packaging. Suggested retail pricing in 1,000-piece quantities is $0.39 each. Evaluation modules of TPS728xx (TPS728185315EVM-267), design application notes and TI’s new Power Management Selection Guide are available through power.ti.com.
About Texas Instruments
Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers’ real world signal processing requirements. In addition to Semiconductor, the company includes the Education Technology business. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.
Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at www.ti.com.
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