Page No. : 1/7 RS7200 250mA Linear Regulator with Enable General Description The RS7200 series is a group of positive voltage output, three‐pin regulators, that provide a high current even when the input/output voltage differential is small. Low power consumption and high accuracy is achieved through CMOS and programmable fuse technologies. Output voltage: 2.0V to 6.0V . The RS7200 consists of a high‐precision voltage reference, an error correction circuit, and a current limited output driver. Transient response to load variations have improved in comparison to the existing series. With good transient responses, output remains stable even during load changes. The CE input enables the output to be turned off , resulting in reduced power consumption. SOT‐25 (150mW) package is available. With regards to the CE function, as well as the positive logic RS7200‐XXGR series, a negative logic RS7200‐XXGP series is also available. Features Applications ● 19μA Quiescent Current (Typ.) ● Operating Voltages Range：+2.5V to +12V ● Output Voltages Range：+2.0V to +6.0V with 100mV Increment ● Maximum Output Current：250mA ● Low Dropout: 380mV@150mA (VOUT≧2.5V) ● High Accuracy of Output Voltage： ±2.0% : VOUT≧2.5 V ±50mV : VOUT≦2.5 V ● High Ripple Rejection：60dB ● Output Current Limit Protection (500mA) ● Short Circuit Protection (200mA) ● Thermal Overload Shutdown Protection ● Low ESR Capacitor Compatible ● SOT‐25 Package ● RoHS Compliant and 100% Lead (Pb)‐Free and Green (Halogen Free with Commercial Standard) ● ● ● ● ● ● ● Battery‐powered equipment Voltage regulator for microprocessor Voltage regulator for LAN cards Wireless Communication equipment Audio/Video equipment Post Regulator for Switching Power Home Electric/Electronic Appliance Application Circuits DS‐RS7200‐02 September, 2009 www.Orister.com Page No. : 2/7 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. Pin Assignment SOT‐25 PACKAGE PIN 1 2 3 4 5 SOT‐25 SYMBOL VIN GND EN NC VOUT DESCRIPTION Regulator Input Pin Ground Pin Chip Enable Pin No Connection Regulator Output Pin Ordering Information DEVICE RS7200‐XX EE YY Z DEVICE CODE XX is nominal output voltage (for example, 20 = 2.0V, 33 = 3.3V, 285 = 2.85V). EE is CE Input Logic, Internal Pull‐Up / Down Resistor : (see CE Functions Table) YY is package designator : NE: SOT‐25 Z is Lead Free designator : P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package G: Green (Halogen Free with Commercial Standard) CE Input Logic Functions EE Code GR GP CE H L H L Operational State ON OFF OFF ON DS‐RS7200‐02 September, 2009 www.Orister.com Page No. : 3/7 Block Diagram Absolute Maximum Ratings Parameter Symbol Ratings Units Input Voltage VIN to GND VIN 12 V Output Current Limit, I(LIMIT) ILIMIT 500 mA o Junction Temperature TJ +155 C o 250 Thermal Resistance SOT‐25 C/W θJA Power Dissipation SOT‐25 PD 150 mW o Operating Ambient Temperature TOPR ‐40 ~ +85 C o Storage Temperature TSTG ‐55~+150 C o Lead Temperature (soldering, 10sec) ‐ +260 C NOTE: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and function operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute‐maximum–rated conditions for extended periods may affect device reliability. Electrical Characteristics (TA=25°C, unless otherwise specified) Symbol VIN VOUT IMAX ILIMIT ISC IQ ISD VIH VIL IEN Parameter Input Voltage Output Voltage Output Current (see NOTE 1) Current Limit Short Circuit Current Ground Pin Current Shutdown Current EN Pin Input Voltage “H” EN Pin Input Voltage “L” EN Pin Leakage Current VDROP Dropout Voltage ΔVLINE ΔVLOAD eN PSRR Line Regulation Load Regulation Output Noise Ripple Rejection Thermal Shutdown Temperature Thermal Shutdown Hysteresis TSD Conditions ‐ VIN=VOUT+1.0V, IOUT=40mA ‐ ‐ VIN= VEN=5V, VOUT=0V VIN= VEN=5V=VOUT+1.0V VIN=VOUT+1.0V, VEN=0V, No Load (see NOTE 2) (see NOTE 2) ‐ VOUT＞2.5V, IOUT=160mA 2.0V＜VOUT≦2.5V, IOUT=160mA VOUT≦2.0V, IOUT=160mA IOUT=40mA, (VOUT+1V)＜VIN＜10V VIN=VOUT+1V, 1mA≦IOUT≦80mA, COUT=1uF IOUT=50mA , F=1KHz, COUT=1uF VIN=VOUT+1V, IOUT=30mA, F=10KHz, Vripple=1VP‐P ‐ Min. 2.0 ‐2% 150 ‐ ‐ ‐ ‐ 1.5 ‐ ‐ ‐ ‐ ‐ ‐ Typ. ‐ VOUT ‐ 0.5 100 ‐ 0.1 ‐ ‐ ‐ 380 550 900 0.2 0.02 40 70 Max. 10 +2% ‐ ‐ ‐ 19 1.0 ‐ 0.25 0.1 0.3 0.04 ‐ ‐ ‐ 160 ‐ THYS ‐ ‐ 10 ‐ NOTES： 1. Measured using a double sided board with 1”x 2” square inches of copper area connected to the GND pins for “heat spreading”. 2. EN pin input voltage must be always less than or equal to input voltage. Unit V V mA A mA uA uA V V uA mV %/V %/mA uV(rms) dB o C o C DS‐RS7200‐02 September, 2009 www.Orister.com Page No. : 4/7 Detail Description The RS7200 is a low quiescent current LDO linear regulator. The device provides preset 2.0V, 2.5V and 3.3V output voltages for output current up to 500mA. Other mask options for special output voltages from 2.0V to 6.0V with 100mV increment are also available. As illustrated in function block diagram, it consists of a 2.0V voltage, error amplifier, a P‐channel pass transistor, an ON/OFF control logic, and an internal feedback voltage divider. The 2.0V bandgap reference is connected to the error amplifier, which compares this reference with the feedback voltage and amplifies the voltage difference. If the feedback voltage is lower than the reference voltage, the pass‐transistor gate is pulled lower, which allows more current to pass to the output pin and increases the output voltage. If the feedback voltage is too high, the pass‐transistor gate is pulled up to decrease the output voltage. The output voltage is feedback through an internal resistive divider connected to VOUT pin. Additional blocks include with output current limiter and shutdown logic. Internal P‐channel Pass Transistor The RS7200 features a P‐channel MOSFET pass transistor. Unlike similar designs using PNP pass transistors, P‐channel MOSFETs require no base drive, which reduces quiescent current. PNP–based regulators also waste considerable current in dropout conditions when the pass transistor saturates, and use high base‐drive currents under large loads. The RS7200 does not suffer from these problems and consumes only19μA (Typical) of current consumption under light loads. Enable Function EN pin starts and stops the regulator. When the EN pin is switched to the power off level, the operation of all internal circuit stops, the build‐in P‐channel MOSFET output transistor between pins VIN and VOUT is switched off, allowing current consumption to be drastically reduced. The VOUT pin enters the GND level due to the several MΩ resistance of the feedback voltage divider between VOUT and GND pins. Output Voltage Selection The RS7200 output voltage is preset at an internally trimmed voltage 2.5V or 3.3V. The output voltage also can be mask‐ optioned from 2.0V to 5.0V with 100mV increment by special order. The first two digits of part number suffix identify the output voltage (see Ordering Information). For example, RS7200‐33 has a preset 3.3V output voltage. Current Limit The RS7200 also includes a fold back current limiter. It monitors and controls the pass‐transistor’s gate voltage, estimates the output current, and limits the output current within 350mA. Thermal Overload Protection Thermal overload protection limits total power dissipation in the RS7200. When the junction temperature exceeds TJ=+155°C, a thermal sensor turns off the pass transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor active again after the junction temperature cools down by 10°C, resulting in a pulsed output during continuous thermal overload conditions. Thermal overload protection is designed to protect the RS7200 in the event of fault conditions. For continuous operation, the maximum operating junction temperature rating of TJ=+125°C should not be exceeded. Dropout Voltage A regulator’s minimum input‐output voltage differential, or dropout voltage, determines the lowest usable supply voltage. In battery‐powered systems, this will determine the useful end‐of‐life battery voltage. The RS7200 uses a P‐channel MOSFET pass transistor, its dropout voltage is a function of drain‐to‐source on‐resistance (RDS(ON)) multiplied by the load current. VDROPOUT = VIN − VOUT = RDS (ON ) × IOUT DS‐RS7200‐02 September, 2009 www.Orister.com Page No. : 5/7 SOT‐25 Dimension NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion. D. Falls within JEDEC MO‐193 variation AB (5 pin). DS‐RS7200‐02 September, 2009 www.Orister.com Page No. : 6/7 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‐RS7200‐02 September, 2009 www.Orister.com Page No. : 7/7 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‐RS7200‐02 September, 2009 www.Orister.com