RS7200

RS7200 ORISTER | Alldatasheet

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Page No. : 1/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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

Page No. : 2/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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 SYMBOL DESCRIPTION

1 VIN Regulator Input Pin

2 GND Ground Pin

3 EN Chip Enable Pin

4 NC No Connection

SOT‐25

5 VOUT Regulator Output Pin

Ordering Information

RS7200‐XX EE YY Z 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 CE Operational State H ON GR L OFF H OFF GP L ON

Page No. : 3/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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 Junction Temperature TJ +155 oC Thermal Resistance SOT‐25 θJA 250 oC/W Power Dissipation SOT‐25 PD 150 mW Operating Ambient Temperature TOPR ‐ 40 ~ +85 oC Storage Temperature TSTG ‐ 55~+150 oC Lead Temperature (soldering, 10sec) ‐ +260 oC 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 Parameter Conditions Min. Typ. Max. Unit VIN Input Voltage ‐ 2.0 ‐ 10 V VOUT Output Voltage VIN=VOUT+1.0V, IOUT=40mA ‐ 2% VOUT +2% V IMAX Output Current (see NOTE 1) ‐ 150 ‐ ‐ mA ILIMIT Current Limit ‐ ‐ 0.5 ‐ A ISC Short Circuit Current VIN= VEN=5V, VOUT=0V ‐ 100 ‐ mA IQ Ground Pin Current VIN= VEN=5V=VOUT+1.0V ‐ ‐ 19 uA ISD Shutdown Current VIN=VOUT+1.0V, VEN=0V, No Load ‐ 0.1 1.0 uA VIH EN Pin Input Voltage “H” (see NOTE 2) 1.5 ‐ ‐ V VIL EN Pin Input Voltage “L” (see NOTE 2) ‐ ‐ 0.25 V IEN EN Pin Leakage Current ‐ ‐ ‐ 0.1 uA VOUT＞2.5V, IOUT=160mA 380 2.0V＜VOUT≦2.5V, IOUT=160mA 550 VDROP Dropout Voltage VOUT≦2.0V, IOUT=160mA 900 mV ΔVLINE Line Regulation IOUT=40mA, (VOUT+1V)＜VIN＜10V ‐ 0.2 0.3 %/V ΔVLOAD Load Regulation VIN=VOUT+1V, 1mA≦IOUT≦80mA, COUT=1uF ‐ 0.02 0.04 %/mA eN Output Noise IOUT=50mA , F=1KHz, COUT=1uF ‐ 40 ‐ uV(rms) PSRR Ripple Rejection VIN=VOUT+1V, IOUT=30mA, F=10KHz, Vripple=1VP‐P ‐ 70 ‐ dB TSD Thermal Shutdown Temperature ‐ ‐ 160 ‐ oC THYS Thermal Shutdown Hysteresis ‐ ‐ 10 ‐ oC 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.

Page No. : 4/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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. OUTONDSOUTINDROPOUT IRVVV ×=−= )(

Page No. : 5/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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).

Page No. : 6/7 DS‐RS7200‐02 September, 2009 www.Orister.com Soldering Methods for Orister’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface‐mount devices Profile Feature Sn‐Pb Eutectic Assembly Pb‐Free Assembly Average ramp‐up rate (TL to TP) <3oC/sec <3oC/sec Preheat ‐ Temperature Min (Tsmin) ‐ Temperature Max (Tsmax) ‐ Time (min to max) (ts) 100oC 150oC 60~120 sec 150oC 200oC 60~180 sec Tsmax to TL ‐ Ramp‐up Rate <3oC/sec <3oC/sec Time maintained above: ‐ Temperature (TL) ‐ Time (tL) 183oC 60~150 sec 217oC 60~150 sec Peak Temperature (TP) 240oC +0/‐5oC 260oC +0/‐5oC Time within 5oC of actual Peak Temperature (tP) 10~30 sec 20~40 sec Ramp‐down Rate <6oC/sec <6oC/sec Time 25oC to Peak Temperature <6 minutes <8 minutes 3. Flow (wave) soldering (solder dipping) Products Peak temperature Dipping time Pb devices. 245oC ±5oC 5sec ±1sec Pb‐Free devices. 260oC +0/‐5oC 5sec ±1sec Figure 1: Temperature profile tP tL Ramp-down Ramp-up Tsmax Tsmin Critical Zone TL to TP tS Preheat TL TP t 25oC to Peak Time Temperature

Page No. : 7/7 DS‐RS7200‐02 September, 2009 www.Orister.com 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.