Preliminary Datasheet LP6496 Wide Range Synchronous Buck Controller General Description Features The LP6496 is a synchronous step down regulator Wide Input Voltage Range: 8V ～ 40V with CC control from a high voltage input supply. Up to 94% Efficiency Operating with an input voltage 8V~40V, the LP6496 No Loop Compensation Required CC/CV control Programmable CC Current stabilization. Thermal Shutdown The LP6496 requires a minimum number of readily Available in SOP8 Package achieves 5A continuous output current with excellent load and line regulation. Current mode operation provides fast transient response and eases loop available standard external components. Other features include cable compensation, programmable Typical Application Circuit current limit and thermal shutdown. The LP6496 converters are available in the industry standard SOP8 packages. 47uH VIN 100uF VBUS+ 1uF 10uF HG VIN 470uF SW LG 180k Order Information FB LP6496 □ □ □ □ F: Pb-Free 24k VBUS- Package Type GND CS Rsen 12mR SO: SOP8 Current Sense Voltage A: VCS=53mV Marking Information B: VCS=65mV Device Marking LP6496A LPS Applications Shipping SOP8 2.5K/REEL Y:Production year W:Production week X:Production batch LP6496 LP6496B Car Charger / Adaptor LED Driver Pre-Regulator for Linear Regulators Distributed Power Systems Battery Charger LP6496-02 Package XXX Marking indication: jun.-2017 Email: [email protected] 1 of 6 Preliminary Datasheet LP6496 Functional Pin Description Package Type Pin Configurations SOP8 HG 1 8 VIN LG 2 7 GND SW 3 6 CS GND 4 5 FB Pin Description Pin Name Description 1 HG PMOS Gate Drive. 2 LG NMOS Gate Drive. 3 SW Switch PIN. 4 GND Power Ground. 5 FB Voltage Feedback. The feedback voltage is 0.6V. 6 CS Output Current Sense. 7 GND Ground 8 VIN Input Supply Voltage. Function Diagram VIN CURRENT SENSE REF LDO PG OSC VSUM SOFT START SW 0.6V EA FB BUFF PWM COMP LOGIC · DRIVER NG CABLE COMPENSATION PROTECT 54mV/66mV EA CS HICCUP LOGIC GND LP6496-00 Jun.-2017 Email: [email protected] www.lowpowersemi.com Page 2 of 6 Preliminary Datasheet LP6496 Absolute Maximum Ratings Note 1 VIN to GND ------------------------------------------------------------------------------------------------------ -0.3V to +43V SW to GND ------------------------------------------------------------------------------------------------------ -0.3V to +43V HG to GND ------------------------------------------------------------------------------------------------------ VIN-6V to VIN All other pin to GND ----------------------------------------------------------------------------------------------0.3V to +6V Storage temperature range------------------------------------------------------------------------------ -55℃ to +150℃ Maximum Operating Junction temperature ----------------------------------------------------------------------- 150℃ Maximum Soldering Temperature (at leads, 10 sec) ---------------------------------------------------------- 260℃ Note 1. 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 Maximum Power Dissipation ( PD,TA=25℃) --------------------------------------------------------------------- 1.5W Thermal Resistance (θJA) ------------------------------------------------------------------------------------------ 80℃/W ESD Susceptibility HBM(Human Body Mode) --------------------------------------------------------------------------------------------- 2KV MM(Machine Mode) --------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions Operating Junction Temperature Range (TJ) ------------------------------------------------------ -40℃ to 150℃ Ambient Temperature Range --------------------------------------------------------------------------- -40℃ to 85℃ LP6496-00 Jun.-2017 Email: [email protected] www.lowpowersemi.com Page 3 of 6 Preliminary Datasheet LP6496 Electrical Characteristics VIN=12V，TA=25℃, unless otherwise noted Parameter Symbol Condition IQ Min Typ Max Units No switching，VFB=0.8V 0.73 1 mA ISW Switching，Iload=0A 10 20 mA VIN_UVLO VIN rising 7.3 8 V Supply Current VIN Under Voltage Lockout Threshold Rising VIN Under Voltage Lockout Threshold Hysteresis VIN OVP Voltage Lockout Threshold Rising VIN OVP Voltage Lockout Threshold Hysteresis 6.6 VIN_HYS VIN_OVP 1 VIN rising 40 VIN_HYS1 VFB=0.6V 41 V 42 V 2.7 V 180 KHz Oscillator Frequency FSW Maximum Duty Cycle DMAX FB Voltage Reference VREF OVP Voltage Reference VOVP 0.706 V SCP voltage Reference VREF_SCP 0.395 V CS Voltage Reference VCS 0.588 0.6 98 % 0.612 V LP6496A 48 53 58 mV LP6496B 58 65 72 mV Line Compensation Current IFB 1.5 uA SCP Frequency FSW1 61 KHz RPMOS=60m，Duty=50% 4.7 A Current Limit ILIMIT RPMOS=30m，Duty=50% 9.3 A Temp rising 150 ℃ Thermal Shutdown TOTP Thermal Shutdown Hysteresis TOTP_HYS 15 ℃ Hiccup Time tHICCUP 260 ms Soft-start Time tSS 2.7 ms LP6496-00 Jun.-2017 Email: [email protected] www.lowpowersemi.com Page 4 of 6 Preliminary Datasheet LP6496 Application Information The LP6496 operates by a constant frequency, current mode architecture. The output voltage is set by an external divider returned to the FB pin. An error amplifier compares the divided output voltage with a reference voltage of 0.6V and adjusts the peak inductor current accordingly. the output node to the FB pin. It is recommended to use divider resistors with 1% tolerance or better. To improve efficiency at very light loads consider using regulator is more susceptible to noise and voltage The total power dissipation in LP6496 is limited by a protection The output voltage is set with a resistor divider from larger value resistors. If the values are too high the Thermal Protection thermal Setting Output Voltage circuit. When the device temperature rises to approximately 150℃, this circuit turns off the output, allowing the IC to cool. The errors from the FB input current are noticeable. For most applications, a resistor in the 10kΩ to 1MΩ range is suggested for RUP and RDN. The output voltage is established by the following equations thermal protection circuit can protect the device from being damaged by overheating in the event of fault conditions. Continuously running the LP6496 into thermal shutdown degrades device reliability. Where VREF is 0.6V. Output Cable Resistance Compensation To compensate for resistive voltage drop across the Current Limit The Current limit is set by outside resistance (RSEN), When the CS voltage larger than 53mV/65mV, the current limit is happened that driver can be turned off. The current limit set according to the following equation: IOUT = VCS / RSEN LP6496-00 VOUT = 0.6V •（1 + RUP / RDN） Jun.-2017 charger's output cable, the LP6496 integrates a simple, user-programmable cable voltage drop compensation using the impedance at the FB pin. The delta VOUT rises when the feedback resistance RSEN value rises, use the equation below: ΔVOUT(mV)=IOUT(A)•RSEN(mΩ)•RUP(KΩ) /40 KΩ Email: [email protected] www.lowpowersemi.com Page 5 of 6 Preliminary Datasheet LP6496 Packaging Information LP6496-00 Jun.-2017 Email: [email protected] www.lowpowersemi.com Page 6 of 6