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TPS40222DRPR Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS40222DRPR Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 26 page www.ti.com FEATURES APPLICATIONS DESCRIPTION R2 2 3 5 4 AVIN PVIN FB GND SW 6 BOOST C1 C2 C3 L1 R1 D1 VOUT VIN UDG−04135 TPS40222 1 0 0.2 0.4 0.6 0.8 1.0 60 70 100 1.2 1.4 1.6 80 90 65 95 75 85 ILOAD − Load Current − A VIN = 5 V VOUT = 1.25 V VOUT = 3.3 V TPS40222 SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006 1.6-A, 1.25-MHz BUCK CONVERTER IN A 3 mm × 3 mm SON PACKAGE • Disk Drives • Input Voltage Range 4.5 VDC to 8 VDC • Set Top Box • Output Voltage (0.8 V to 90% VIN) • Point of Load Power • 0 A to 1.6 A Current Capability • ASIC Power Supplies • Fixed 1.25-MHz Switching Frequency • Reference 0.8 V ±1% • Internal 250 m Ω N-Channel MOSFET Switch The TPS40222 is a fixed-frequency, current-mode, • Current Mode Control with Internal Slope non-synchronous buck converter optimized for Compensation applications powered by a 5-V distributed source. • Internal Soft-Start With internally determined operating frequency, soft-start time, and control loop compensation, the • Internal Loop Compensation TPS40222 provides many features with a minimum of • Short Circuit Protection external components. • Thermal Shutdown The TPS40222 operates at 1.25 MHz and supports • High Efficiency Up to 92% up to 1.6-A output loads. The output voltage can be • Small 3 mm × 3 mm SON Package programmed to as low as 0.8 V. The TPS40222 utilizes pulse-by-pulse current limit as well as frequency foldback to protect the converter during a catastrophic short circuited output condition. SIMPLIFIED APPLICATION DIAGRAM TYPICAL EFFICIENCY vs LOAD CURRENT 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. Copyright © 2005–2006, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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