AAT1189IRN-0.6-T1

PRODUCT DATASHEET AAT1 189 SwitchRegTM General Description The AAT1189 is a single output step-down (Buck) DC output regulator with an integrated high side MOSFET. The input range is 6V to 24V making it the ideal power IC solution for consumer communications equipment operating from a low cost AC/DC adapter with 12V output. The step-down regulator provides up to 2.5A output current in a small package. 490kHz fixed switching frequency allows small L/C filtering components. Voltage mode control allows for optimum performance across the entire output voltage and load range. The controller includes programmable over-current, integrated soft-start and over-temperature protection. The AAT1189 is available in the Pb-free, low profile 16-pin TDFN34 package. The rated operating temperature range is -40°C to 85°C. High Voltage Step-Down Regulator Features • • • • • • • • • • • • • VIN = 6.0 to 24.0V VOUT Adjustable from 1.5V to 5.5V IOUT up to 2.5A Small Solution Size Low-Cost Non-Synchronous Solution Shutdown Current ILIMIT 10mΩ DCR R7 = VOUT · R1 5V · 6.34kΩ = 634kΩ = 0.1V - 5A · 10mΩ VOCP - ILIMIT · DCR R1 · R 7 6.34kΩ · 634kΩ = = 6.40kΩ 634kΩ - 6.34kΩ R7 - R 1 R6 = AAT1189 Losses All values assume an 85°C ambient temperature and thermal resistance of 50°C/W in the TDFN34-16 package. PTOTAL = IOUT2 · RDS(ON)H · D + (tSW · FS · IOUT + IQ) · VIN 2 PTOTAL = 2.5A · 70mΩ · 5V + (5ns · 490kHz · 2.5A + 70µA) · 12V 12V PTOTAL = 257mW TJ(MAX) = TAMB + ΘJA · PLOSS = 85°C + (50°C/W) · 257mW = 98°C 1189.2008.06.1.0 www.analogictech.com 17 PRODUCT DATASHEET AAT1 AAT1 189 SwitchRegTM Ordering Information Package TDFN34-16 High Voltage Step-Down Regulator Voltage 0.6 Marking1 3RXYY Part Number (Tape and Reel)2 AAT1189IRN-0.6-T1 All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor products that are in compliance with current RoHS standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more information, please visit our website at http://www.analogictech.com/about/quality.aspx. Package Information TDFN34-163 3.000 ± 0.050 1.600 ± 0.050 Detail "A" Index Area 4.000 ± 0.050 3.300 ± 0.050 0.350 ± 0.100 Top View Bottom View C0.3 0.230 ± 0.050 (4x) 0.850 MAX 0.050 ± 0.050 0.229 ± 0.051 Side View Detail "A" All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection. 18 www.analogictech.com 0.450 ± 0.050 Pin 1 Indicator (optional) 1189.2008.06.1.0 PRODUCT DATASHEET AAT1 AAT1 189 SwitchRegTM High Voltage Step-Down Regulator Advanced Analogic Technologies, Inc. 3230 Scott Boulevard, Santa Clara, CA 95054 Phone (408) 737-4600 Fax (408) 737-4611 © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. 1189.2008.06.1.0 www.analogictech.com 19