LP3983HAB5F

Preliminary Datasheet LP3983H 600mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator General Description Features The LP3983H is designed for portable RF and wireless  Ultra-Low-Noise for RF Application applications with demanding performance and space  2.2V- 6V Input Voltage Range requirements. The LP3983H performance is optimized  Low Dropout : 420mV @ 600mA  600mA Output Current, 750mA Peak Current  High PSRR: -70dB at 217Hz  < 0.01uA Standby Current When Shutdown  Ultra-Fast Response in Line/Load transient  Current Limiting and Thermal Shutdown for battery-powered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The LP3983H also works with low-ESR ceramic capacitors, reducing the amount of board Protection space necessary for power applications, critical in hand-held wireless devices. The LP3983H consumes Applications less than 0.01µA in shutdown mode and has fast  Portable Media Players/MP3 players turn-on time less than 50µs. The other features include  Cellular and Smart mobile phone ultra low dropout voltage, high feedback accuracy,  LCD/ DSC Sensor current limiting protection, and high ripple rejection  Wireless Card ratio. It is available in the 5-lead of SOT23-5 and Typical Application Circuit SOT89-5 packages. Vin LP3983HAB5F VIN OUT 1 2.2uF Order Information LP3983H □ Vout 5 22pF (Option) □ □ □ Chip Enable 3 EN F: Pb-Free Package Type ADJ GN D R1 4 2 R2 B5: SOT23-5 X5: SOT89-5 Output Type A：Adjustable Marking Information Device Marking LPS LP3983HAB5F 1FYWX Package Shipping SOT23-5 3K/REEL SOT89-5 1K/REEL LPS LP3983HAX5F 3983X YWX Marking indication: Y:Year code .W: W is week code. X: X is series number. LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 10 2.2uF Preliminary Datasheet LP3983H Functional Pin Description Package Type Pin Configurations EN GND 3 2 VIN VOUT GND 3 2 1 (MARKING) SOT23-5 / SOT89-5 VIN 1 (MARKING) 4 5 4 5 ADJ VOUT ADJ EN SOT23-5 SOT89-5 Pin Description Pin Name Description SOT23-5 SOT89-5 1 1 VIN Power Input Voltage. 2 2 GND Ground. 3 5 EN 4 4 BP 5 3 VOUT LP3983H-04 Jul.-2018 Chip Enable (Active High). There is an integrated pull low 1M Ω resistor connected to GND when the EN pin is floating. Feedback pin. The reference voltage is 0.8V. Output Voltage. Vout=VFB ×（1+R1/R2）， which VFB = 0.8V Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 10 Preliminary Datasheet LP3983H Function Diagram Absolute Maximum Ratings  Supply Input Voltage --------------------------------------------------------------------------------------- -0.3V to 6.5V  EN Pin Voltage ----------------------------------------------------------------------------------------- -0.3V to Vin+0.3V Power Dissipation, PD @ TA = 25°C  SOT23-5 --------------------------------------------------------------------------------------------------------------- 500mW  SOT89-5 --------------------------------------------------------------------------------------------------------------- 700mW Package Thermal Resistance  SOT23-5, θJA ------------------------------------------------------------------------------------------------------- 195°C/W  SOT89-5, θJA ------------------------------------------------------------------------------------------------------- 165°C/W  Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------ 260°C  Storage Temperature Range -------------------------------------------------------------------------- −40°C to 150°C ESD Susceptibility  HBM (Human Body Mode) --------------------------------------------------------------------------------------------- 2kV  MM(Machine-Mode) --------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions  Supply Input Voltage ------------------------------------------------------------------------------------------- 2.2V to 6V  Operation Ambient Temperature Range ------------------------------------------------------------ −40°C to 85°C LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 10 Preliminary Datasheet LP3983H Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1µF, , TA = 25° C, unless otherwise specified) Parameter Symbol Test Conditions Output Loading Current ILOAD VEN=VIN,VIN>2.5V 600 mA Current Limit ILIM RLOAD = 1Ω 750 mA VFB IOUT=1mA IQ Adjustable voltage reference Quiescent Current Dropout Voltage VDROP Min 0.784 Typ 0.816 V VEN ≥ 1.2V, IOUT = 0mA 75 130 μA IOUT = 200mA, VOUT >2.8V 140 160 mV IOUT = 400mA, VOUT >2.8V 280 320 mV IOUT = 600mA, VOUT >2.8V 420 480 VIN = (VOUT + 1V) to 5.5V, ΔVLINE Load Regulation ΔVLOAD 1mA < IOUT < 300mA Standby Current ISTBY VEN = GND, Shutdown 0.01 EN Input Bias Current IIBSD VEN = 5V 5 VIL VIN=3V to 5.5V, Shutdown VIH VIN=3V to 5.5V, Start-Up EN Voltage Threshold Logic-High Voltage Power Supply f = 217Hz Rejection Rate f = 1kHz Thermal Shutdown Temperature LP3983H-04 Jul.-2018 IOUT = 1mA 10Hz to 100kHz, IOUT=200mA Output Noise Voltage COUT=1µF PSRR Units 0.8 Line Regulation Logic-Low Max COUT=1µF, IOUT=10mA TSD Email: marketing@lowpowersemi.com 0.2 % 2 % 1 μA nA 0.4 VIN+ 1.4 0.3 V V 100 uVRMS −70 dB −58 dB 150 °C www.lowpowersemi.com Page 4 of 10 Preliminary Datasheet LP3983H Typical Operating Characteristics LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 5 of 10 Preliminary Datasheet LP3983H EN Soft Start Function (VIN=5V，VOUT=3.3V，CIN=1uF，COUT=4.7uF) EN Voltage Output Voltage LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 6 of 10 Preliminary Datasheet LP3983H Applications Information Like any low-dropout regulator, the external capacitors used with the LP3983H must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1µF on the LP3983H input and the amount of capacitance can be increased without limit. The input capacitor must be located a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. There is a special attention which is the input capacitance should not be less than output capacitance. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor with larger value and lower ESR (equivalent series Enable Function The LP3983H features an LDO regulator enable/disable function. To assure the LDO regulator will switch on, the EN turn on control level must be greater than 1.4 volts but not above Vin+0.3V. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below 0.4 volts. For protecting the system, the LP3983H have a 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. Feedback Capacitor and Voltage resistance) provides better PSRR and line-transient For adjustable version, connecting a 22pF between response. The output capacitor must meet both output pin and FB pin significantly reduces output requirements for minimum amount of capacitance voltage ripple, it is critical that the capacitor and ESR in all LDOs application. The LP3983H is connection should be direct and PCB traces should designed specifically to work with low ESR ceramic be as short as possible. The output voltage of output capacitor in space-saving and performance LDO could be set by the formula below: consideration. Using a ceramic capacitor whose value is at least 1µF with ESR is > 25mΩ on the LP3983H output ensures stability. The LP3983H 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 LP3983H and returned to a clean analog ground. Vout=VFB ×（1+R1/R2） which VFB = 0.8V VOUT(V) 1.2 1.5 1.8 2 2.5 2.8 3 3.3 3.5 4 4.2 4.5 R2(KΩ) R1(KΩ) 51 25.5 51 44.6 51 63.8 47 70.5 47 99.9 47 117.5 33 90.8 33 103.1 33 111.4 33 132.0 33 140.3 33 152.6 Considering the practical application, we may add a small capacitor with R1 in parallel which could be 22pF or 47pF. LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 7 of 10 Preliminary Datasheet The maximum power dissipation can be calculated Thermal Considerations(for SOT23-5) Thermal protection limits power dissipation in LP3983H. When the operation junction temperature exceeds 150°C, the OTP circuit starts the thermal shutdown function turn the pass element off. The pass element turns on again after the junction temperature cools by 25°C. For continue operation, do not exceed absolute maximum operation junction temperature 150°C. The power dissipation definition in device is: 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 LP3983H temperature difference between junction and ambient. by following formula: PD(MAX) = ( TJ(MAX) − TA ) /θJA Where TJ(MAX) is the maximum operation junction temperature 150°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of LP3983H, where TJ(MAX) is the maximum junction temperature of the die (150°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for SOT23-5 package is 195°C/W. PD = (150°C−25°C) / 195 = 641mW (SOT23-5) The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. Considering the PCB thermal feather, the PD(MAX) may be higher than 500mW. LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 8 of 10 Preliminary Datasheet LP3983H Packaging Information SOT23-5 LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 9 of 10 Preliminary Datasheet LP3983H SOT89-5 LP3983H-04 Jul.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 10 of 10