LP6498AB6F

Preliminary Datasheet LP6498A 600KHz 36V/1.2A Synchronous Step-down Converter General Description The LP6498A  Input Voltage Range: 4.5V to 30V  Output Voltage Range: 0.8V to 12V 4.5V to 30V.1.2A continuous output current .The  1200mA Load Current converter  Up to 93% Efficiency  600KHz Switching Frequency minimum number of readily available standard  Short Circuit Protection external components.over current protection and  Thermal Fault Protection  S O T 2 3 - 6 Package  RoHS Compliant and 100% Lead (Pb)-Free regulator is from a Features synchronous a high step-down voltage input supply.Operating with an input voltage range from integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. LP6498A Requires a thermal shutdown . output short circuit protection. The LP6498A converters are available in the industry standard SOT23-6 packages. Typical Application Circuit Order Information LP6498A □ □ VIN □ F: Pb-Free Vout VIN SW 22uF 15uH 22uF Package Type EN NC GND FB R1 B6:SOT23-6 R2 Applications Marking Information  Car Charger / Adaptor  Pre-Regulator for Linear Regulators  Distributed Power Systems  USB Dedicated Charging Ports (DCP) LP6498A-00 Mar.-2018 Device LP6498AB6F Marking LPS AOYWX Package SOT23-6 Shipping 3K/REEL Marking indication: Y: Year code. W: Week code. X: Batch numbers. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 7 Preliminary Datasheet LP6498A Functional Pin Description Package Type SOT23-6(Top View) Pin Configurations NC 1 6 SW GND 2 5 VIN FB 3 4 EN Pin Description PIN Name Description 1 NC No connection. 2 GND Ground. 3 FB 4 EN Enable Pin 5 VIN Voltage supply. 6 SW Switch Mode Connection to Inductor. This pin connects to the drains of the Feedback Input. Vout = ( R1 + 1) × VFB R2 internal main and synchronous power MOSFET switches. LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 7 Preliminary Datasheet LP6498A Function Diagram VIN CURRENT SENSE EN REF LDO PG OSC ISUM SOFT START 0.8V SW EA FB PWM CONTROL LOGIC DRIVER NG PROTECT GND Absolute Maximum Ratings Note 1  VIN\SW \EN to GND ---------------------------------------------------------------------------------------------- -0.3V to 36V  VOUT\LED\RV\FB to GND--------------------------------------------------------------------------------------- -0.3V to 6.5V  Maximum Junction Temperature -------------------------------------------------------------------------------------- 150°C  Storage Temperature ------------------------------------------------------------------------------------------ -65℃ to 165℃  Operating Ambient Temperature Range (TA) ------------------------------------------------------------- -20℃ to 85°C  Maximum Soldering Temperature (at leads, 10 sec) ------------------------------------------------------------- 260°C 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 (SOT23-6, PD, TA=25℃) ------------------------------------------------------------ 0.6W  Thermal Resistance (SOT23-6, θJA) ------------------------------------------------------------------------------ 200℃/W ESD Susceptibility  HBM(Human Body Mode) -------------------------------------------------------------------------------------------------- 2KV  MM(Machine Mode) --------------------------------------------------------------------------------------------------------- 200V LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 7 Preliminary Datasheet LP6498A Electrical Characteristics VIN=12V, VEN=5V, TA=25℃, unless otherwise noted Symbol Parameter Condition Min Typ VIN Input Voltage 4.5 VFB Feedback Threshold Voltage Accuracy 0.784 IQ Quiescent Current Iload=0mA 8 mA VUVLO VIN Under Voltage Lockout Threshold VIN Rising 4 V VUVLO-HYS UVLO Hysteresis 0.5 V ILIM P-Channel Current Limit 0.8 TJ=25℃ 2.4 TJ=150℃ 1.6 Max Units 30 V 0.816 V A RDS(ON)_H High-Side Switch On Resistance 240 mΩ RDS(ON)_L Low-Side Switch On Resistance 130 mΩ THICCUP Hiccup Time 6 mS TSS Soft-start Time 0.8 mS fOSC Oscillator Frequency 600 KHz tSD Over-Temperature Shutdown Threshold 150 ℃ THYS Over-Temperature Shutdown Hysteresis 20 ℃ LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 4 of 7 Preliminary Datasheet LP6498A Typical Operating Characteristics Efficiency VS Iout 100 90 80 Efficiency(%) 70 60 50 40 VIN=8V 30 VIN=12V 20 VIN=18V 10 VIN=24V 0 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 IOut(A) LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 5 of 7 Preliminary Datasheet LP6498A Operation Information Layout Guidance Functional Description When laying out the PCB board, the following layout guideline The LP6498A is a switch-mode step-down DC-DC converter. The device operates at a fixed 600KHz switching frequency, and uses a slope compensated current mode architecture. This step-down DC-DC converter can supply up to 1.2A output current at input voltage range from 4.5V to 30V. It minimizes external component size and optimizes efficiency at the heavy load range. The integrated slope compensation allows the device to remain stable over a wider range of inductor values so that smaller values (6.8μH to 22μH) with should be followed to ensure proper operation of the LP6498A: 1. The power traces, including the GND trace, the SW trace and the IN trace should be kept short, direct and wide to allow large current flow. The L connection to the SW pins should be as short as possible. Use several VIN pads when routing between layers. 2. The input capacitor (CIN) should connect as closely as possible to VIN and GND to get good power filtering. lower DCR can be used to achieve higher efficiency. LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 6 of 7 Preliminary Datasheet LP6498A Packaging Information SOT23-6 LP6498A-00 Mar.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 7 of 7