LP6285QVF

LP6285 Preliminary Datasheet Multi-Channel DC-DC Converter for LCD Panel General Description Features The LP6285 includes a high-efficiency boost regulator, a VCOM buffer, and dual charge pump controller for active matrix TFT LCDs.   The converter is a high switching frequency current-mode regulator with an integrated N-Channel 200mΩ MOSFET that allows the use of small inductors and ceramic capacitors. The Unity-Gain buffer can drive the VCOM voltage, that features high short-circuit current, fast slew rate and rail-to-rail inputs and outputs. The positive/negative charge pump controller provides regulated Gate-On voltage. The regulation of the charge pump is generated by the internal comparator that senses the output voltage and compares it with an internal reference. Other features include under-voltage protection, short circuit protection, thermal shutdown protection and under-voltage lockout (UVLO). The LP6285 is available in a space saving QFN-16 (0.5mm pitch) package. Order Information LP6285 □ □ □ F: Pb-Free Package Type Wide VIN Range: 2.5V to 5.5V 1.2MHz Current-Mode Boost Regulator  Adjustable Output Voltage (±1%)  Built-In 2.5A, 200mΩ N-MOSFET  Internal Soft-Start  Operation Amplifier for VCOM Buffer  Adjustable Detecting Voltage  Open-Drain Reset Output  VGH and VGL Charge Pump  Under-Voltage Protection  Over-Temperature Protection  Available in QFN-16 (3mm×3mm)  RoHS Compliant  Pb-Free Package Applications   Photo Frame GPS Marking Information Device Marking Package Shipping LP6285 LPS QFN-16 3K/REEL LP6285 YWX Y: Y is year code. W: W is week code. X: X is series number. QVF: QFN-16 LP6285–00 Version 0.1 MAR.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8 LP6285 Preliminary Datasheet Typical Application Circuit L1 10uH AVDD 10V VIN C1 22uF RIN 10Ω R1 75kΩ VIN LX FB COMP CIN 1uF RCOM 10Ω VCOM OPO AVDD REF C6 1uF C3 4.7uF R6 10kΩ R5 75kΩ VGL 7.25V FBN DRVP DRVN C5 2.2uF R2 10kΩ CCOMP 1nF OPP OPI RCOMP 75kΩ C2 22uF C7 0.1uF C8 0.1uF FBP VGH 15.8V R3 150kΩ R4 13kΩ C4 2.2uF AGND PGND Figure 1. Typical Application Circuit of LP6285 Pin Configuration FBN DRVP FBP COMP 16 15 14 13 DRVN 1 12 FB REF 2 11 VIN 10 LX AGND 3 NC 4 EP 9 5 NC 6 7 PGND 8 OPI OPO AVDD Figure 2. QFN-16 Package (3mm x 3mm) Top View LP6285–00 Version 0.1 MAR.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8 LP6285 Preliminary Datasheet Function Block Diagram VIN Control Logic AGND OSC OTP Boost Negative Charge Pump OPI OPO LX FB COMP PGND REF FBN DRVN AVDD Positive Charge Pump FBP DRVP Figure 3. Function Block Diagram LP6285–00 Version 0.1 MAR.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 8 LP6285 Preliminary Datasheet Functional Pin Description Pin NO. Pin Name 1 DRVN 2 REF 3 AGND Analog GND. 4, 5 NC No connection. 6 OPI Unity-Gain OP Input pin. 7 OPO Unity-Gain OP Output pin. 8 AVDD VDD for Source Driver Power. This also supplies the Charge-Pump/OPA power source. 9 PGND Power Ground. 10 LX 11 VIN 12 FB 13 COMP 14 FBP 15 DRVP 16 FBN EP LP6285–00 Version 0.1 MAR.-2017 Description VGL Charge-Pump Regulator Driver Output. Reference Voltage Output. Connect a ceramic capacitor between REF and GND. Boost Regulator Switching Node. Connect the inductor and the schottky diode to LX. Supply Input. The input voltage range is between 2.5V to 5.5V. Connect a ceramic capacitor between VIN and GND. Boost Regulator Feedback Input. Connect to an external resistive voltage divider from the output to FB to set the output voltage. Boost Regulator Error Amplifier Compensation Pin. VGH Charge-Pump Regulator Feedback Input. Connect to an external resistive voltage divider from the VGH to GND to set the output voltage. VGH Charge-Pump Regulator Driver Output. VGL Charge-Pump Regulator Feedback Input. Connect to an external resistive voltage divider from the VGL to REF to set the output voltage. Exposed pad. Connect this pin to other gnd pin. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 4 of 8 LP6285 Preliminary Datasheet Absolute Maximum Ratings Note 1  VIN to GND -------------------------------------------------------------------------------------------------------- −0.3V to +7V  AVDD, LX to GND ----------------------------------------------------------------------------------------------- −0.3V to +20V  FB, FBP, FBN, COMP, REF to GND ----------------------------------------------------------------------- −0.3V to (VIN + 0.3V)  OPI, OPO, DRVP, DRVN to GND -------------------------------------------------------------------------- −0.3V to (AVDD + 0.3V)  PGND to GND ---------------------------------------------------------------------------------------------------- −0.3V to +0.3V  Operating Junction Temperature Range (TJ)  Operation Ambient Temperature Range -------------------------------------------------------------- −40°C to +85°C  Storage Temperature Range ---------------------------------------------------------------------------- −65°C to +150°C  Maximum Soldering Temperature (at leads, 10sec) ----------------------------------------------- +260°C  Maximum Junction Temperature ----------------------------------------------------------------------- +150°C ------------------------------------------------------ −40°C to +150°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. LP6285–00 Version 0.1 MAR.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 5 of 8 LP6285 Preliminary Datasheet Electrical Characteristics (VIN =3.3V, VAVDD =10V, TA=25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units General VIN Input Supply Voltage AVDD VIN 2.5 5.5 V AVDD 6 18 V 18 20 V AVDD Over Voltage Protect VOVP Boost Switching Frequenc y FLX 1 1.2 1.4 MHz Charge Pump Frequenc y FCP 500 600 700 kHz VFB=1.3V, LX no Switching 0.3 0.6 mA VFB=1.1V, LX Switching 0.8 2 mA 0.6 0.9 mA 2 2.2 V VIN Supply Current AVDD Operation Current IQ IAVDD Input UVLO Threshold VUVLO(VTH) VIN Rising UVLO Threshold Hysteresis VUVLO(HYS) Falling Hysteresis Reference Voltage VREF Thermal Shutdown Threshold TSD 1.8 100 1.176 Thermal Shutdown Hysteresis 1.2 mV 1.224 V 150 °C 30 °C Boost Regulator Maximum Duty-Cycle DMAX 86 90 94 % Feedback Voltage VFB 1.188 1.2 1.212 V Transcocnductance Gm Voltage Gain ΔI=5uA 70 uA/V AV 700 V/V RDS(ON) 200 Current Limit ILimit 2.5 LX Leak Current ILeak Internal Soft Start Time TSS UVP Fault Protection Voltage VUVP UVP Fault Delay Short Circuit Protection Voltage Switch-ON Resistance LP6285–00 Version 0.1 MAR.-2017 LX Off. 0.01 500 mΩ A 1 uA 10 ms 0.95 V TUVP 100 ms VSCP 100 mV VFB Falling Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 6 of 8 LP6285 Preliminary Datasheet Electrical Characteristics (Continued) (VIN =3.3V, VAVDD =10V, TA=25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Charge Pump Charge Pump Soft Start Time Positive Feedback Voltage TSS_CP 3.4 VFBP 1.176 1.2 1.224 V 3 20 Ω 3 20 Ω 240 270 mV RDS_DRVN1 3 20 Ω RDS_DRVN2 3 20 Ω 2 15 mV RDS_DRVP1 AVDD=10V, IDRVP=20mA DRVP Switch ON Resistance RDS_DRVP2 Negative Feedback Voltage ms VFBN 210 DRVN Switch ON Resistance Operation Amplifier Input Offset Voltage VOS VOPO=VAVDD/2 ILoad = 500uA Output Voltage Swing High VOH ILoad = 5mA AVDD - 20 AVDD - 200 ILoad = -500uA Output Voltage Swing Low Short Circuit Current Slew Rate LP6285–00 Version 0.1 MAR.-2017 VOL VOP_Short AVDD -5 AVDD - 50 mV 5 20 ILoad = -5mA 150 200 VOPO=VAVDD/2 ±100 mA 12 V/us SR Email: marketing@lowpowersemi.com 8 www.lowpowersemi.com Page 7 of 8 LP6285 Preliminary Datasheet Outline Information QFN-16 Package (3×3) pitch 0.5 (Unit: mm) D2 E D LPS LP6285 YWX A1 2 E2 Ne b e Nd C SYMBOL A LP6285–00 Version 0.1 MAR.-2017 h 1 L A h DIMENSION IN MILLIMETER MIN NOM MAX 0.700 0.750 0.800 A1 --- 0.020 0.050 b 0.180 0.250 0.300 C 0.180 0.200 0.250 D 2.900 3.000 3.100 D2 1.550 1.650 1.750 E 2.900 3.000 3.100 E2 1.550 1.650 1.750 e 0.500 BSC Nd 1.500 BSC Ne 1.500 BSC L 0.350 0.400 0.450 h 0.200 0.250 0.300 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 8 of 8