LP5305QVF

LP5305 Preliminary Datasheet Over Voltage and Over Current Protection IC General Description Features The LP5305 is a highly integrated circuits, it used to protect low voltage system from abnormal high input voltage. The IC continuously check the input voltage, the input current, and the battery voltage. When the protection status is occur, the power MOS will turn off at the same time. The LP5305 is safety devices to ensure worked against accidents.             In case of the input voltage exceeds a OVP threshold voltage level, the power MOS will turn off within 1μs. The current limit can is adjustable by external resistor between ISET and GND. And the current is also limited to prevent charging the battery with an excessive current. The LP5305 also monitors the Li-ion battery voltage, when the battery voltage exceeds 4.35V, the IC will turn off the MOS. Other features include over temperature protection and under-voltage lockout (UVLO). The LP5305 is available in a space saving DFN-8 package. F: Green Package Type QV: DFN-8 LP5305 Version 0.2 JUN.-2018 Applications    Cell Phones Digital Cameras Portable Instruments Marking Information Order Information LP5305 □□□ Withstand High Input Voltage Up to 26V Adjustable Over Current Protection Input Over Voltage Protection Battery Over Voltage Protection High Accuracy Protection Thresholds Fault Signal Output Enable Control Under Voltage Lockout Output Short-Circuit Protection Over-Temperature Protection Available in DFN-8 RoHS Compliant and Halogen Free Device Marking Package Shipping LP5305 LPS DFN-8 3K/REEL LP5305 YWX Y: Y is year code. W: W is week code. X: X is series number. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8 LP5305 Preliminary Datasheet Typical Application Circuit VBUS VIN VOUT LP5305 Cin Fault BAT EN H/L ISET GND VOUT VDD COUT RPU Fault RBAT RSET Battery Figure 1. Typical Application Circuit of LP5305 . Pin Configuration VIN 1 GND 2 NC 3 Fault 4 Exposed Pad 8 VOUT 7 ISET 6 BAT 5 EN Figure 2. Package Top View LP5305 Version 0.2 JUN.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8 LP5305 Preliminary Datasheet Function Block Diagram VOUT VIN Driver OCP ISET Switch BAT EN UVLO OTP OVP OSC Control Logic Fault GND Fault Figure 3. Function Block Diagram Functional Pin Description Pin NO. DFN8 VIN 1 Power source input. Connect a ceramic capacitor between VIN and GND. GND 2 Ground. NC 3 No connect. Fault 4 Fault output pin. Open-drain output, device status. EN 5 Enable pin. BAT 6 Battery voltage detector input. ISET 7 OCP level setting by an external resistor to GND. VOUT 8 Output through the power MOSFET. EP Description Exposed pad. Connect EP to GND is suggested. LP5305 Version 0.2 JUN.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 8 LP5305 Preliminary Datasheet Absolute Maximum Ratings Note1  VIN to GND -------------------------------------------------------------------------------------------------------- -0.3V to +30V  VOUT to GND ---------------------------------------------------------------------------------------------------- -0.3V to +7V  All Other Pin to GND -------------------------------------------------------------------------------------------- -0.3V to +7V  Operating Junction Temperature Range (TJ) -------------------------------------------------------- -40℃ to 150℃  Operation Ambient Temperature Range ------------------------------------------------------------- -40°C to +105°C  Storage Temperature Range  Maximum Soldering Temperature (at leads, 10sec) ---------------------------------------------------------------------------- -65°C to +150°C ----------------------------------------------- +260°C Note1. Stresses beyond those listed under “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 for extended periods may affect device reliability. Thermal Information  Thermal Resistance DFN-8, θJA -------------------------------------------------------------------------------------------------------------- 76.11 °C/W Recommended Operating Conditions  Input Voltage, VIN ------------------------------------------------------------------------------------------------- 3.3V to 5V  Output Current, IOUT --------------------------------------------------------------------------------------------- 0.3A to 1.5A  OCP Set Resistance, RSET ------------------------------------------------------------------------------------ 15kΩ to 90kΩ  Junction Temperature, TJ -------------------------------------------------------------------------------------- -40°C to 125°C LP5305 Version 0.2 JUN.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 4 of 8 LP5305 Preliminary Datasheet Electrical Characteristics (VIN = 5V, TA = 25°C, Unless Otherwise Specified) Parameter Symbol Test Conditions Min Typ Max Units General Function Power Source Voltage VIN TJ= +25 °C 3.3 5 26 V Input UVLO Threshold VUVLO VIN Rising 2.5 2.7 2.9 V UVLO Threshold Hysteresis ΔVUVLO Power On Deglitch Time Soft Start Time Falling Hysteresis 200 mV TDeglitch 8 ms TSS 8.2 ms Power Source Current IIN VIN=5V, EN=L 400 µA Shutdown Current ISD VIN=5V, EN=H 55 uA Thermal Shutdown Threshold TSD 140 °C Thermal Shutdown Threshold Hysteresis ΔTSD 20 °C Logic Function EN Threshold Voltage VENH 1.4 V VENL IEN 0.4 V EN=2V 15 uA FAULT Output Logic Low Sink 5mA 0.2 V FAULT Logic High Leakage Current Fault=5V EN Input Resistance to GND 10 uA 250 mΩ Power MOS Switch On Resistance RDS(ON) IOUT=1A 160 VLDO VIN=5.7V 5.5 V VIOVP VIN from 5V to 10V 5.85 V Input OVP threshold Hysteresis ΔVIOVP VIN from 10V to 5V 100 mV Input OVP Recovery Delay Time TOVPR 8.2 ms 1 A Regulation Function Output Voltage Regulation Protection Functions Input Over Voltage Protect threshold RSET = 24.9K, 3.3V