Page No. : 1/13 RS1117A 1.0A Low Dropout Positive Voltage Regulator General Description The RS1117A is a 1A low‐dropout positive voltage regulator. It is available in fixed and adjustable output voltage versions. Over current and thermal protection are integrated onto the chip. Output current will limit as while it reaches the pre‐set current or temperature limit. The dropout voltage is specified at 1.40V Maximum at full rated output current. The RS1117A series provides excellent regulation over line, load and temperature variations. Features Applications ● Low Dropout Voltage 1.40V (Max.) at 1.0A ● Adjustable or Fixed Voltage (1.2V, 1.8V, 2.5V, 3.3V and 5.0V) ● Over Current Protection ● Thermal Overload Protection ● Maximum Line Regulation 0.2% ● Maximum Load Regulation 1.0% ● Adjust Pin Current Less Than 120uA ● ● ● ● ● SCSI‐2 Active Termination High Efficiency Linear Regulators 5V to 3.3V Voltage Converter Battery Charger Battery Management Circuits For Notebook And Palmtop PCs ● Core Voltage Supply: FPGA, PLD, DSP, CPU Application Circuits This integrated circuit can be damaged by ESD. Orister Corporation 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. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 2/13 Pin Assignments SOT‐89 SOT‐223 TO‐252 TO‐220‐3 PACKAGE SOT‐89 PACKAGE SOT‐223 PACKAGE TO‐252 PACKAGE TO‐220‐3 PIN 1 2 3 SYMBOL ADJ/GND VOUT VIN DESCRIPTION Ground Pin or ADJ Terminal Pin for Adjustable. Regulator Output Pin Regulator Input Pin PIN 1 2, 4 3 SYMBOL ADJ/GND VOUT VIN DESCRIPTION Ground Pin or ADJ Terminal Pin for Adjustable. Regulator Output Pin Regulator Input Pin PIN 1 2, 4 3 SYMBOL ADJ/GND VOUT VIN DESCRIPTION Ground Pin or ADJ Terminal Pin for Adjustable. Regulator Output Pin Regulator Input Pin PIN 1 2, 4 3 SYMBOL ADJ/GND VOUT VIN DESCRIPTION Ground Pin or ADJ Terminal Pin for Adjustable. Regulator Output Pin Regulator Input Pin Ordering Information DEVICE RS1117A‐XX YY Z DEVICE CODE XX is nominal output voltage designator : AD: ADJ 12: 1.2V 18: 1.8V 25: 2.5V 33: 3.3V 50: 5.0V YY is package designator : M: SOT‐89 SJ: SOT‐223 J: TO‐252 E: TO‐220‐3 Z is Lead Free designator : P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package G: Green (Halogen Free with Commercial Standard) DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 3/13 Absolute Maximum Ratings Parameter Input Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 5 Sec HBM (Human Body Mode) Symbol VIN PD TOPR TSTG TLEAD Maximum 20 Internally Limited * 0 To +125 ‐65 To +150 260 2 Units V W °C °C °C KV/Min *: SOT‐223: 0.9W(Max.), SOT‐89: 0.6W(Max.), TO‐252: 0.9W(Max.), TO‐220: 2.1W(Max.) Electrical Characteristics (VIN=VLX=3.6V, TA=25°C, unless otherwise specified) RS1117A‐12 (1.2V) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Quiescent Current Temp. Coefficient Temp. Stability RMS Output Noise Ripple Rejection Ratio Symbol VOUT REGLINE REGLOAD VDROPOUT I S IQ TC TS VN RA Test Conditions VIN=5V, IO=0A TJ=0 oC to 125 oC VIN=4.75V to 6V, IO=0A TJ=0 oC to 125oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=0A to 1A VIN=4.75V to 6V TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC VIN=4.75V to 6V, IO=0A to 1A VIN=5V, IO=100mA TJ=0 oC to 125 oC 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 1.176 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ 60 Typ. 1.200 ‐ 0.1 1.2 1.5 6.0 0.005 0.5 0.003 72 Max. 1.224 0.2 1.0 1.4 ‐ 13 ‐ ‐ ‐ ‐ Symbol VOUT REGLINE REGLOAD VDROPOUT I S IQ TC TS VN RA Test Conditions VIN=5V, IO=0A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A TJ=0 oC to 125oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=0A to 1A VIN=4.75V to 7V TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A to 1A VIN=5V, IO=100mA TJ=0 oC to 125 oC 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 1.764 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ 60 Typ. 1.800 ‐ 0.1 1.2 1.5 6.0 0.005 0.5 0.003 72 Max. 1.836 0.2 1.0 1.4 ‐ 13 ‐ ‐ ‐ ‐ Symbol VOUT REGLINE REGLOAD VDROPOUT I S IQ TC TS VN RA Test Conditions VIN=7V, IO=0A TJ=0 oC to 125 oC VIN=7V to 9V, IO=0A TJ=0 oC to 125 oC VIN=7V, IO=0A to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=0A to 1A VIN=7V to 10V TJ=0 oC to 125 oC VIN=7V, IO=0A to 1A TJ=0 oC to 125 oC VIN=7V to 10V, IO=0A to 1A VIN=5V, IO=100mA TJ=0 oC to 125 oC 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 4.900 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ 60 Typ. 5.000 ‐ 0.1 1.2 1.5 6.0 0.005 0.5 0.003 72 Max. 5.100 0.2 1.0 1.4 ‐ 13 ‐ ‐ ‐ ‐ Units V % V A mA %/ oC % %ΔVO dB RS1117A‐18 (1.8V) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Quiescent Current Temp. Coefficient Temp. Stability RMS Output Noise Ripple Rejection Ratio Units V % V A mA %/ oC % %ΔVO dB RS1117A‐50 (5.0V) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Quiescent Current Temp. Coefficient Temp. Stability RMS Output Noise Ripple Rejection Ratio DS‐RS1117A‐16 September, 2009 Units V % V A mA %/ oC % %ΔVO dB www.Orister.com Page No. : 4/13 RS1117A‐33 (3.3V) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Quiescent Current Temp. Coefficient Temp. Stability RMS Output Noise Ripple Rejection Ratio Symbol VOUT REGLINE REGLOAD VDROPOUT I S IQ TC TS VN RA Test Conditions VIN=5V, IO=0A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=0A to 1A VIN=4.75V to 7V TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A to 1A VIN=5V, IO=100mA TJ=0 oC to 125 oC 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 3.234 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ 60 Typ. 3.300 ‐ 0.1 1.2 1.5 6.0 0.005 0.5 0.003 72 Max. 3.370 0.2 1.0 1.4 ‐ 13 ‐ ‐ ‐ ‐ Symbol VOUT REGLINE REGLOAD VDROPOUT I S IQ TC TS VN RA Test Conditions VIN=5V, IO=0A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=0A to 1A VIN=4.75V to 7V TJ=0 oC to 125 oC VIN=5V, IO=0A to 1A TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=0A to 1A VIN=5V, IO=100mA TJ=0 oC to 125 oC 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 2.450 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ 60 Typ. 2.500 ‐ 0.1 1.2 1.5 6.0 0.005 0.5 0.003 72 Max. 2.550 0.2 1.0 1.4 ‐ 13 ‐ ‐ ‐ ‐ Test Conditions VIN=5V, IO=10mA TJ=0 oC to 125 oC VIN=4.75V to 7V, IO=10mA TJ=0 oC to 125 oC VIN=5V, IO=10mA to 1A TJ=0 oC to 125 oC TJ=0 oC to 125 oC ΔVO=±1%, IO=10mA to 1A o o VIN=2.7V to 7V TJ=0 C to 125 C VIN=2.75V to 7V, IO=10mA to 1A VIN=2.75V to 7V, IO=10mA to 1A TJ=0 oC to 125 oC VIN=2.75V to 7V, IO=10mA to 1A TJ=0 oC to 125 oC VIN=5V, IO=100mA TJ=0 oC to 125 oC VIN=5V 10Hz ≤ f ≤ 10KHz TJ=25 oC VIN=5V, IO=1A TJ=0 oC to 125 oC Min. 1.225 ‐ ‐ ‐ 1.0 ‐ ‐ ‐ ‐ ‐ ‐ 60 Typ. 1.250 ‐ 0.1 1.2 1.5 0.005 55 0.2 0.5 5.0 0.003 72 Max. 1.275 0.2 1.0 1.4 ‐ ‐ 120 5.0 ‐ 10 ‐ ‐ Units V % V A mA %/ oC % %ΔVO dB RS1117A‐25 (2.5V) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Quiescent Current Temp. Coefficient Temp. Stability RMS Output Noise Ripple Rejection Ratio Units V % V A mA %/ oC % %ΔVO dB RS1117A‐AD (ADJ) Parameter Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Temp. Coefficient Adjust Pin Current Adjust Pin Current Change Temp. Stability Minimum Load Current RMS Output Noise Ripple Rejection Ratio Symbol VREF REGLINE REGLOAD VDROPOUT I S TC IADJ ΔIADJ TS IO VN RA Units V % V A %/ oC uA % mA %ΔVO dB DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 5/13 Characteristics Curve DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 6/13 Detail Description Output Voltage Adjustment Like most regulators, RS1117A series regulate the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version, the VREF is available externally as 1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minimum output load). The output voltage is given by the following equation: VOUT =VREF (1+R2/R1) + IADJ R2 On fixed versions of RS1117A series, the voltage divider is provided internally. In V IN Out V OUT ADJ V REF R1 I ADJ 10uA R2 Thermal Protection VOUT =VREF (1+R2/R1) + IADJ R2 RS1117A series have thermal protection which limits junction temperature to 150°C. However, device functionality is only guaranteed to a maximum junction temperature of +125°C. The power dissipation and junction temperature for RS1117A in all packages given by PD=(VIN‐VOUT)IOUT, TJUNCTION=TAMBIENT+(PDxθJA), Note: TJUNCTION must not exceed 125°C Current Limit Protection RS1117A series are protected against overload conditions. Current protection is triggered at typically 1.5A. Stability and Load Regulation RS1117A series require a capacitor from VOUT to GND to provide compensation feedback to the internal gain stage. This is to ensure stability at the output terminal. Typically, a 47uF tantalum or 100uF aluminum electrolytic is sufficient. Note : It is important that the ESR for this capacitor does not exceed 0.5Ω. The output capacitor does not have a theoretical upper limit and increasing its value will increase stability. COUT=100uF or more is typical for high current regulator design. In V IN Adj Out RP Parasitic Line Resistance R1 Connect R1 to Case RL R2 Connect R2 to Load RS1117A series load regulation are limited by the resistance of the wire connecting it to the load(RP). For the adjustable version, the best load regulation is accomplished when the top of the resistor divider(R1) is connected directly to the output pin of the RS1117A series. When so connected, RP is not multiplied by the divider ratio. For fixed output versions, the top of R1 is internally connected to the output and ground pin can be connected to low side of the load as a negative side sense if, so desired. Thermal Consideration The RS1117A series contain thermal limiting circuitry designed to protect itself for over‐temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As mention in thermal protection section, we need to consider all sources of thermal resistance between junction and ambient. It contains junction‐to‐case, case‐to‐heat‐sink interface and heat sink resistance itself. An additional heat sink is applied externally sometimes. It can increase the maximum power dissipation. For example, the equivalent junction temperature of 300mA output current is 115°C without external heat sink. Under the same junction temperature IC can operates 500mA with an adequate heat sink. Therefore, to attach an extra heat sink is recommended. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 7/13 Junction‐to‐case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. The bonding wires are appending paths. The former is the lowest resistance path. Proper mounting is required to ensure the best possible thermal flow this area of the package to the heat sink. Thermal compound at the case‐to‐heat‐sink interface is strongly recommended. The case of all devices in this series is electrically connected to the output. Therefore, if the case of the device must be electrically isolated, a thermally conductive spacer can be used, as long its thermal resistance is considered. Protection Diode In general operation, RS1117A series don’t need any protection diodes. From the cross‐section structure of RS1117A series, the output pin is connected to P+ substrate, and the input pin is connected to N‐ well. There is a parasitic reverse diode between them. It can handle microsecond surge currents of 5A to 10A. Even with large output capacitance, it is very difficult to get those values of surge currents in normal operation. Only with high value output capacitors, such as 1000uF. And with the input pin instantaneously shorted to ground, can damage occur. A crowbar circuit at the input of the RS1117A series can generate those kinds of currents, and a diode from output to input is recommended. Normal power supply cycling or even plugging and unplugging in the system will not generate currents large enough to do any damage. 9ROWDJH&RGH,QIRUPDWLRQ Voltage&RGH Output Voltage Package Output Voltage Output Voltage RS1117ASJ-A ADJ RS1117AJ-A ADJ RS1117ASJ-B 1.8V RS1117AJ-B 1.8V RS1117ASJ-C 2.5V RS1117AJ-C 2.5V RS1117ASJ-D 3.3V RS1117AJ-D 3.3V RS1117ASJ-E 5.0V RS1117AJ-E 5.0V RS1117A0-A ADJ RS1117AE-A ADJ RS1117A0-B 1.8V RS1117AE-B 1.8V RS1117AE-C 2.5V SOT-223 627 RS1117A0-C 2.5V RS1117A0-D 3.3V RS1117AE-D 3.3V RS1117A0-E 5.0V RS1117AE-E 5.0V Package TO-252 72$% DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 8/13 SOT‐89 Dimension NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. The center lead is in electrical contact with the tab. D. Body dimensions do not include mold flash or protrusion. Mold flash and protrusion shall not exceed 0.15 per side. E. Thermal pad contour optional within these dimensions. F. Falls within JEDEC TO‐243 variation AA, except minimum lead length, pin 2 minimum lead width, minimum tab width. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 9/13 SOT‐223 Dimension NOTES: A. All linear dimensions are in millimeters (inches). B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion. D. Falls within JEDEC TO‐261 variation AA. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 10/13 TO‐252 Dimension NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. The center lead is in electrical contact with the tab. D. Body dimensions do not include mold flash or protrusion. Mold flash and protrusion shall not exceed 0.15 per side. E. Thermal pad contour optional within these dimensions. F. Falls within JEDEC TO‐252 variation AA. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 11/13 TO‐220‐3 Dimension NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Lead dimensions are not controlled within this area. D. All lead dimensions apply before solder dip. E. The center lead is in electrical contact with the tab. F. The chamfer is optional. G. Thermal pad contour optional within these dimensions. H. Falls within JEDEC TO‐220 variation AB. Except minimum lead thickness, minimum exposed pad length, and maximum body length. DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 12/13 Soldering Methods for Orister’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface‐mount devices Figure 1: Temperature profile tP Critical Zone TL to TP TP Ramp-up TL tL Temperature Tsmax Tsmin tS Preheat 25 Ramp-down t 25oC to Peak Time Profile Feature Average ramp‐up rate (TL to TP) Sn‐Pb Eutectic Assembly o <3 C/sec Preheat Pb‐Free Assembly <3oC/sec ‐ Temperature Min (Tsmin) 100oC 150oC ‐ Temperature Max (Tsmax) 150oC 200oC 60~120 sec 60~180 sec ‐ Time (min to max) (ts) Tsmax to TL ‐ Ramp‐up Rate o <3 C/sec <3 C/sec Time maintained above: ‐ Temperature (TL) ‐ Time (tL) o 217oC 183 C 60~150 sec Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp‐down Rate Time 25oC to Peak Temperature o o o 60~150 sec 240 C +0/‐5 C 260oC +0/‐5oC 10~30 sec 20~40 sec <6oC/sec <6oC/sec <6 minutes <8 minutes Peak temperature Dipping time 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb‐Free devices. o o 245 C ±5 C o o 260 C +0/‐5 C 5sec ±1sec 5sec ±1sec DS‐RS1117A‐16 September, 2009 www.Orister.com Page No. : 13/13 Important Notice: © Orister Corporation Orister cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an Orister product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. Orister reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in Orister’s terms and conditions of sale, Orister assumes no liability whatsoever, and Orister disclaims any express or implied warranty relating to the sale and/or use of Orister 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 Orister deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. Orister and the Orister logo are trademarks of Orister Corporation. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. DS‐RS1117A‐16 September, 2009 www.Orister.com