RS1562-18S5

DSTECH RS1562 2μA, 600mA Low Dropout Voltage Linear Regulator General Description Features The RS1562 series are a group of low-dropout ( LDO ) ⚫ 2μA Ground Current at no Load voltage regulators offering the benefits of wide input ⚫ ±2% Output Accuracy voltage range from 1.2V to 5.5V, low dropout voltage, ⚫ 600mA Output Current low power consumption, and miniaturized packaging. ⚫ 10nA Disable Current ( by option ) Quiescent current of only 2µA makes these devices ⚫ Wide Operating Input Voltage Range: 1.2V to 5.5V ideal for powering the battery-powered, always-on ⚫ Dropout Voltage: 0.36V at 600mA / VOUT 3.3V systems that require very little idle-state power ⚫ Support Fixed Output Voltage 0.8V, 1.0V, 1.2V, 1.5V, dissipation to a longer service life. There is an option of 1.8V, 2.5V, 2.8V, 3.0V, 3.3V shutdown mode by selecting the parts with the EN pin ⚫ Stable with Ceramic or Tantalum Capacitor and pulling it low. The shutdown current in this mode ⚫ Current Limit Protection goes down to only 10nA ( typical ). ⚫ Over-Temperature Protection The RS1562 series of linear regulators are stable with ⚫ SOT-23-3 & SOT-23-5 Packages Available the ceramic output capacitor over its wide input range from 1.2V to 5.5V and the entire range of output load current ( 0mA to 600mA ). Pin Configurations Applications ⚫ Portable, Battery Powered Equipment ⚫ Low Power Microcontrollers ⚫ Laptop, Palmtops and PDAs ⚫ Wireless Communication Equipment ⚫ Audio/Video Equipment ⚫ Car Navigation Systems SOT-23-3 SOT-23-5 SOT-23-5 VOUT VIN RS1562-06 1 SNS GND EN DSTECH RS1562 Ordering Information RS1562-AABB Designator AA BB Description Symbol Description 08 VOUT = 0.8V .. .. 25 VOUT = 2.5V .. .. 33 VOUT =3.3V 1K VOUT =1.05V 2H VOUT =2.85V S3 SOT-23-3 S5 SOT-23-5 Symbol Description 08 VOUT = 0.8V .. .. .. .. .. .. 33 VOUT =3.3V S5 SOT-23-5 Output Voltage Package type RS1562N-AABB ( For SOT-23-5 with SNS pin ) Designator AA BB Description Output Voltage Package type RS1562-06 2 DSTECH RS1562 Description of Functional Pins RS1562 Pin No Pin Name Pin Function SOT-23-3 SOT-23-5 1 2 GND Ground 2 5 VOUT Output of the Regulator 3 1 VIN Input of Supply Voltage. 3 EN Enable Control Input. 4 NC No internal connection RS1562N ( For SOT-23-5 with SNS pin ) Pin No Pin Name Pin Function SOT-23-5 1 VIN Input of Supply Voltage. 2 GND Ground 3 EN 4 SNS 5 VOUT Enable Control Input. Sense of Output Voltage. Output of the Regulator RS1562-06 3 DSTECH RS1562 Typical Application Circuit Figure 1: Application circuit of Fixed VOUT LDO Figure 2: Application circuit of Fixed VOUT LDO with enable function VOUT VIN NC R1 1uF 1uF SNS R2 GND Figure 3: Application circuit of Fixed VOUT LDO with enable and sense functions RS1562-06 4 DSTECH RS1562 Function Block Diagram Current/Thermal Sense VOUT (Without SNS Pin) (Without EN Pin) VIN VREF SNS RT EN EN RB GND Absolute Maximum Ratings (Note 1) VIN to GND ------------------------------------------------------------------------------------------------------------------ -0.3V to 6.5V VOUT, EN to GND --------------------------------------------------------------------------------------------------- -0.3V to 6V VOUT to VIN ------------------------------------------------------------------------------------------------------------------- -6V to 0.3V Package Thermal Resistance (Note 2) SOT-23-3 & SOT-23-5, θJA ------------------------------------------------------------------------------------------- 200 oC /W Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------------- 260 oC Junction Temperature ------------------------------------------------------------------------------------------------------------- 150 oC Storage Temperature Range --------------------------------------------------------------------------------------- -60 oC to 150 oC ESD Susceptibility HBM ---------------------------------------------------------------------------------------------------- -------------------------- 2KV MM ------------------------------------------------------------------------------------------------------------------------------- 200V CDM --------------------------------------------------------------------------------- --------------------------------------------- 2KV Recommended Operating Conditions Input Voltage VIN ---------------------------------------------------------------------------------------------------------- 1.2V to 5.5V Junction Temperature Range ---------------------------------------------------------------------------------------- -40 oC to 125 oC Ambient Temperature Range ----------------------------------------------------------------------------------------- -40 oC to 85 oC RS1562-06 5 DSTECH RS1562 Electrical Characteristics (VIN =5V, VEN = 5V TA=25oC unless otherwise specified) Parameter Supply Voltage Symbol VIN DC Output Voltage Accuracy SNS Input Current Test Conditions ILOAD =0.1mA ISNS Min Typ Max Unit 1.2 -- 5.5 V 2 % -2 SNS = VOUT μA 0.7 VDROP_3V VOUT ≥ 3V VDROP_2.8V VOUT = 2.8V 0.45 VDROP_2.5V VOUT = 2.5V 0.45 VDROP_1.8V VOUT = 1.8V 0.57 VDROP_1.5V VOUT = 1.5V 0.71 VDROP_1.2V VOUT = 1.2V 0.9 VDROP_0.8V VOUT = 0.8V 1.05 Ground Current IQ ILOAD = 0mA 2 Shutdown Ground Current ISD VEN = 0V, 0.01 0.5 ILEAK VOUT = 0V 0.01 0.5 VIH EN Rising Dropout Voltage (ILOAD =600mA) (Note 3) VOUT Shutdown Leakage Current Enable Threshold Voltage VIL EN Input Current IEN -- VOUT ≥ 1.2V 1.0 VOUT < 1.2V 1.7 0.36 V μA μA V VOUT ≥ 1.2V 0.4 VOUT < 1.2V 0.6 EN Falling V VEN = 5V 10 100 nA ILOAD =30mA, Line Regulation ΔLINE 1.5V ≤ VIN ≤ 5.5V or 0.2 % 0.2 % 601 1100 mA (VOUT + 0.2V) ≤ VIN ≤ 5.5V Load Regulation Output Current Limit Power Supply Rejection Ratio (ILOAD =5mA) ΔLOAD ILIM PSRR Output Voltage Noise (BW = 10Hz to 100kHz, COUT Thermal Shutdown Hysteresis Discharge Resistance VOUT =0 VOUT =1.2V, f = 100Hz -- 80 -- VIN = 2V f = 1kHz -- 75 -- VIN = 3.5V VOUT =0.9V -- 50 -- ILOAD =0.1A =1μF,) Thermal Shutdown Temperature 10mA ≤ ILOAD ≤ 0.3A dB μVRMS VOUT =2.8V TSD ΔTSD -- 110 -- -- 155 -- °C -- 15 -- °C -- 100 -- Ω ILOAD =10mA EN = 0V , VOUT = 0.1V RS1562-06 6 DSTECH RS1562 Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θJA is measured at TA = 25°C on a DSTECH EVB board. Note 3. VDROP = VIN − VOUT when the VOUT is 98% of its target value. RS1562-06 7 DSTECH RS1562 Typical Characteristics RS1562-06 8 DSTECH RS1562 Current Limit Response VOUT (1V/Div) CH1: VOUT CH4: IOUT ILOAD (400mA/Div) 2mS/Div Load Transient Response I Load Transient Response II RS1562-06 9 DSTECH RS1562 Line Transient Response VOUT Turn On/Off by EN PSRR vs. Frequency Noise Density Spectrum RS1562-06 10 DSTECH RS1562 Application Guideline Input and Output Capacitor Requirements Adjustable Output Voltage Application The external input and output capacitors of RS1562 The RS1562N by SNS pin also can work as an series must be properly selected for stability and adjustable output voltage LDO. Figure 1 gives the performance. Use a 1μF or larger input capacitor and connections place it close to the IC's VIN and GND pins. Any output application. The resistor divider from VOUT to SNS sets capacitor meeting the minimum 1mΩ ESR ( Equivalent the output voltage when in regulation. Series Resistance ) and effective capacitance between The voltage on the SNS pin sets the output voltage and 1μF and 22μF requirement may be used. Place the is determined by the values of R1 and R2. To keep a output capacitor close to the IC's VOUT and GND pins. good temperature coefficient of output voltage, the Increasing capacitance and decreasing ESR can values of R1 and R2 should be selected carefully to improve the circuit's PSRR and line transient response. ignore the temperature effect of input current at the SNS for the adjustable output voltage pin. A current greater than 50μA in the resistor divider is Current Limit recommended to meet the above requirement. The The RS1562 series contain the current limiter of output adjustable output voltage can be calculated using the power transistor, which monitors and controls the formula given in equation 1: VOUT = transistor, limiting the output current to 1100mA 𝑅1+𝑅2 𝑅2 × VSNS (1) ( typical ). where VSNS is determined by the output voltage The output can be shorted to ground indefinitely without selections in the ordering information of RS1562N-08. damaging the part. The minimum recommended 50μA in the resistor divider makes the application no longer a 2µA low quiescent LDO. Dropout Voltage The RS1562 series use a PMOS pass transistor to achieve low dropout. When ( VIN – VOUT ) is less than OTP (Over Temperature Protection) the dropout voltage (VDROP), the PMOS pass device is The over temperature protection function of RS1562 in the linear region of operation and the input-to-output series will turn off the P-MOSFET when the junction resistance is the RDS(ON) of the PMOS pass element. temperature exceeds 155°C ( typ. ). Once the junction VDROP scales approximately with the output current temperature cools down by approximately 15°C, the because the PMOS device behaves as a resistor in regulator will automatically resume operation. dropout condition. As any linear regulator, PSRR and transient response are degraded as ( VIN – VOUT ) approaches dropout condition. RS1562-06 11 DSTECH RS1562 Thermal Application For continuous operation, do not exceed the absolute TA=25°C, DSTECH PCB, maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC The max PD ( Max ) = ( 125°C − 25°C ) / ( 200°C/W ) = package, PCB layout, rate of surrounding airflow, and 0.5W for SOT-23-3 & SOT-23-5 packages. difference between junction and ambient temperature. The maximum power dissipation can be calculated as Power dissipation (PD) is equal to the product of the below: output current and the voltage drop across the output pass element, as shown in the equation below: PD = ( VIN – VOUT ) × IOUT Layout Consideration By placing input and output capacitors on the same side of the PCB as the LDO, and placing them as close as is practical to the package can achieve the best performance. The ground connections for input and output capacitors must be back to the RS1562 ground pin using as wide and as short of a copper trace as is practical. Connections using long trace lengths, narrow trace widths, and/or connections through via must be avoided. These add parasitic inductances and resistance that results in worse performance especially during transient conditions. RS1562-07 12 DSTECH RS1562 Package Information: D H L C B e A A1 b Symbol A A1 B b C D e H L Millimeters Min. Max. 0.889 1.295 0.000 0.152 1.397 1.803 0.250 0.560 2.591 2.997 2.692 3.099 1.803 2.007 0.080 0.254 0.300 0.610 SOT-23-3L RS1562-06 13 Inches Min. 0.035 0.000 0.055 0.010 0.102 0.106 0.071 0.003 0.012 Max. 0.051 0.006 0.071 0.022 0.118 0.122 0.079 0.010 0.024 DSTECH RS1562 D H L C B e A A1 b Symbol A A1 B b C D e H L Millimeters Min. Max. 0.889 1.295 0.000 0.152 1.397 1.803 0.250 0.560 2.591 2.997 2.692 3.099 0.838 1.041 0.080 0.254 0.300 0.610 SOT-23-5L RS1562-06 14 Inches Min. 0.035 0.000 0.055 0.010 0.102 0.106 0.033 0.003 0.012 Max. 0.051 0.006 0.071 0.022 0.118 0.122 0.041 0.010 0.024