LP3984-28B5F

Preliminary Datasheet LP3984 300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator General Description Features The LP3984 is designed for portable RF and wireless  Ultra-Low-Noise for RF Application applications with demanding performance and space  2.5V- 5.5V Input Voltage Range requirements. The LP3984 performance is optimized  Low Dropout : 300mV @ 300mA for battery-powered systems to deliver ultra low noise  300mA Output Current and low quiescent current. The LP3984 also works  High PSSR:-68dB at 1KHz with low-ESR ceramic capacitors, reducing the amount  1uA Standby Current When Shutdown of board space necessary for power applications,  Available in SOT23-5 Package critical in hand-held wireless devices. The LP3984  TTL-Logic-Controlled Shutdown Input consumes less than 1µA in shutdown mode. The other  Ultra-Fast Response in Line/Load transient features include ultra low dropout voltage, high output  Current Limiting and Thermal Shutdown accuracy, current limiting protection, and high ripple rejection ratio. It is available in the 5-lead of SOT23-5 packages. Applications Order Information LP3984 F: Pb-Free Package Type B5: SOT23-5 Output Type 12 ： 1.2V 15 ： 1.5V 18 25 28 30 33 36 LP3984-04 Protection ： ： ： ： ： ： 1.8V 2.5V 2.8V 3.0V 3.3V 3.6V May.-2018  Portable Media Players/MP3 players  Cellular and Smart mobile phone  LCD  DSC Sensor  Wireless Card Typical Application Circuit VIN VIN CIN 1μF CHIP ENABLE Email: marketing@lowpowersemi.com VOUT VOUT COUT 1μF GND EN NC www.lowpowersemi.com Page 1 of 6 Preliminary Datasheet LP3984 Marking Information Device Marking Package Shipping Device Marking Package Shipping LP3984-12B5F LPS SOT23-5 3K/REEL LP3984-30B5F LPS SOT23-5 3K/REEL SOT23-5 3K/REEL SOT23-5 3K/REEL 4BYWX LP3984-15B5F LPS 4GYWX SOT23-5 3K/REEL LP3984-33B5F LPS 4NYWX LP3984-18B5F LPS 4EYWX SOT23-5 3K/REEL LP3984-36B5F LPS 4CYWX LP3984-25B5F LPS 4LYWX SOT23-5 3K/REEL Marking indication: 4DYWX LP3984-28B5F LPS Y: Y is year code. W: W is week code. X: X is series number. SOT23-5 3K/REEL 4HYWX Functional Pin Description Package Type Pin Configurations Top View SOT23-5 SOT-23-5 VIN 1 GND 2 EN 3 5 VOUT 4 NC Pin Description Pin Name Description 1 VIN Power Input Voltage. 2 GND Ground. 3 EN Chip Enable (Active High). 4 NC No Connection. 5 VOUT Output Voltage. LP3984-04 May.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 6 Preliminary Datasheet LP3984 Function Diagram Absolute Maximum Ratings  Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6.5V  Other Pin Voltage ---------------------------------------------------------------------------------------- -0.3V to VIN+0.3V Power Dissipation, PD @ TA = 25℃  SOT23-5 ----------------------------------------------------------------------------------------------------------------- 500mW Package Thermal Resistance  Thermal Resistance (SOT23-5) (JA) ---------------------------------------------------------------------------- 195℃/W  Thermal Resistance (SOT23-5) (JC) ------------------------------------------------------------------------------ 60℃/W  Maximum Junction Temperature ------------------------------------------------------------------------------------ 150℃  Maximum Soldering Temperature (at leads, 10 sec) ---------------------------------------------------------- 260℃  Storage Temperature Range ---------------------------------------------------------------------------- −65℃ to 150℃ ESD Susceptibility  HBM (Human Body Mode) ------------------------------------------------------------------------------------------------ 2kV  MM (Machine-Mode) ----------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions  Supply Input Voltage ------------------------------------------------------------------------------------------- 2.5V to 5.5V  EN Input Voltage --------------------------------------------------------------------------------------------- 0V toVIN+0.3V  Operation Junction Temperature Range ------------------------------------------------------------- −40℃ to 125℃  Operation Ambient Temperature Range --------------------------------------------------------------- −40℃ to 85℃ LP3984-04 May.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 6 Preliminary Datasheet LP3984 Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1µF, TA = 25° C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ. Max Units Output Voltage Accuracy ΔVOUT IOUT=1mA −2 -- +2 % Output Loading Current ILOAD VEN=VIN,VIN>2.8V 300 Current Limit ILIM RLOAD=1Ω 500 Quiescent Current IQ VEN≥1.2V, IOUT=0mA 50 130 Dropout Voltage VDROP IOUT=200mA, VOUT>2.8V 200 240 IOUT=300mA, VOUT>2.8V 300 360 Line Regulation ΔVLINE Load Regulation ΔLOAD 1mA 25mΩ on the PD = (VIN−VOUT) x IOUT + VIN x IQ The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula: LP3984 output ensures stability. The LP3984 still works well with output capacitor of other types due to the wide stable ESR range. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located not more than 0.5 inch from the VOUT pin of the LP3984 and returned to a clean analog ground. PD(MAX) = ( TJ(MAX) − TA ) / θJA Where TJ(MAX) is the maximum operation junction temperature 125℃, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of LP3984, where TJ(MAX) is the maximum junction temperature of the die (125℃) and TA is the maximum ambient temperature. The junction to Start-up Function Enable Function ambient thermal resistance (θJA is layout dependent) The LP3984 features an LDO regulator enable/disable for SOT23-5 package is 195℃/W. function. To assure the LDO regulator will switch on, the EN turn on control level must be greater than 1.4 volts. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below 0.4 volts. For to protecting the system, the LP3984 have a PD(MAX) = ( 125℃ − 25℃ ) / 195 = 500mW The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. quick-discharge function. If the enable function is not needed in a specific application, it may be tied to VIN to keep the LDO regulator in a continuously on state. LP3984-04 May.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 5 of 6 Preliminary Datasheet LP3984 Packaging Information SOT23-5 LP3984-04 May.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 6 of 6