4-Channel Integrated LCD Supply

® ISL97651 Data Sheet March 15, 2007 FN7493.2 4-Channel Integrated LCD Supply The ISL97651 represents a high power, integrated LCD supply IC targeted at large panel LCD displays. The ISL97651 integrates a high power, 4.4A boost converter for AVDD generation, an integrated VON charge pump, a VOFF charge pump driver, VON slicing circuitry and a buck regulator with 2A switch for logic generation. The ISL97651 have been designed for ease of layout and low BOM cost. Supply sequencing is integrated for both AVDD -> VOFF -> VON and AVDD/VOFF -> VON sequences. The TFT power sequence uses a separate enable to the logic buck regulator for maximum flexibility. Peak efficiencies are 90% for boost and 92% for buck while operating from a 4V to 5.5V input supply. The current mode buck offers superior line and load regulation. Available in the 36 Ld QFN package, the ISL97651 is specified for ambient operation over the -40°C to +105°C temperature range. Features • 4V to 5.5V input supply • AVDD boost up to 20V, with integrated 4.4A FET • Integrated VON charge pump, up to 34V out • VOFF charge pump driver, down to -18V • VLOGIC buck down to 1.2V, with integrated 2A FET • Automatic start-up sequencing - AVDD -> VOFF -> VON or AVDD/VOFF -> VON - Independent logic enable • VON slicing • Thermally enhanced thin QFN package (6mmx6mm) • Pb-free plus anneal available (RoHS compliant) Applications • LCD monitors (15”+) • LCD-TVs (40”+) Pinout ISL97651 (36 LD TQFN) TOP VIEW 29 CDEL 31 DELB 33 VIN2 32 CM1 34 FBB 30 ENL 36 NC 28 NC 35 EN • Notebook displays (up to 16”) • Industrial/medical LCD displays Ordering Information 27 AGND 26 PGND1 25 PGND2 24 VINL VIN1 1 LX1 2 LX2 3 CB 4 LXL 5 VSUP 6 FBL 7 CM2 8 CTL 9 NC 10 COM 12 POUT 13 C1- 14 C1+ 15 C2- 16 C2+ 17 DRN 11 NC 18 THERMAL PAD PART NUMBER (Note) ISL97651ARTZ-T PART MARKING ISL976 51ARTZ TAPE & PACKAGE PKG. REEL (Pb-Free) DWG. # 13” 36 Ld 6x6 (4k pcs) TQFN 13” 36 Ld 6x6 (1k pcs) TQFN L36.6x6 L36.6x6 ISL97651ARTZ-TK ISL976 51ARTZ 23 NOUT 22 PGND3 21 FBN 20 VREF 19 FBP NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL97651 Absolute Maximum Ratings (TA = +25°C) Maximum Pin Voltages, All Pins Except Below . . . . . . . . . . . . . 6.5V LX1, LX2, VSUP, NOUT, DELB, C1-, C2- . . . . . . . . . . . . . . . . .24V C1- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14V CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13V DRN, COM, POUT, C1+, C2+ . . . . . . . . . . . . . . . . . . . . . . . . .36V CB-VINL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V Thermal Information Thermal Resistance θJA (°C/W) θJC (°C/W) 6x6 QFN Package (Notes 1, 2) . . . . . . 30 2.5 Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Power Dissipation TA ≤ +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3W TA = +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.8W TA = +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3W TA = +100°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.8W Recommended Operating Conditions Input Voltage Range, VIN . . . . . . . . . . . . . . . . . . . . . . . . . 4V to 5.5V Boost Output Voltage Range, AVDD . . . . . . . . . . . . . . . . . . . . +20V VON Output Range, VON . . . . . . . . . . . . . . . . . . . . . . +15V to +32V VOFF Output Range, VOFF . . . . . . . . . . . . . . . . . . . . . . -15V to -5V Logic Output Voltage Range, VLOGIC . . . . . . . . . . . +1.5V to +3.3V Input Capacitance, CIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 x 10µF Boost Inductor, L1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3µH to 10µH Output Capacitance, COUT . . . . . . . . . . . . . . . . . . . . . . . . 2 x 22µF Buck Inductor, L2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3µH to 10µH Operating Ambient Temperature Range . . . . . . . . -40°C to +105°C Operating Junction Temperature . . . . . . . . . . . . . . -40°C to +125°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. +150°C max junction temperature is intended for short periods of time to prevent shortening the lifetime. Operation close to +150°C junction may trigger the shutdown of the device even before +150°C, since this number is specified as typical. NOTES: 1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 2. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications PARAMETER SUPPLY PINS VIN VINL VSUP IVIN VIN = 5V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over-temperature from -40°C to +105°C, unless otherwise stated. CONDITIONS MIN TYP MAX UNIT DESCRIPTION Supply Voltage (VIN1 and VIN2) Logic Supply Voltage Charge Pumps and VON Slice Positive Supply Quiescent Current into VIN Enabled, No switching Disabled 4 4 4 5 5 5.5 5.5 20 3 10 V V V mA µA mA µA mA µA V V V V kHz IINL Logic Supply Current Enabled, No switching Disabled 0.4 1.0 10 0.5 10 ISUP VSUP Supply Current Enabled, No switching and VPOUT = VSUP Disabled VLOR VLOF VREF Undervoltage lockout threshold Undervoltage lockout threshold Reference Voltage VIN rising VIN falling TA = +25°C 2.0 1.9 1.19 1.187 2.75 2.2 1.205 1.205 1200 2.9 2.5 1.235 1.238 1400 fOSC Oscillator Frequency 1010 AVDD BOOST DMax, Maximum Duty Cycle: Minimum 84% VBOOST IBOOST Boost Output Range Boost Switch Current Current limit 1.25*VIN 4.4 4.8 20 6.3 V A 2 FN7493.2 March 15, 2007 ISL97651 Electrical Specifications PARAMETER EFFBOOST rDS(ON) ΔVBOOST/ΔVIN ΔVBOOST/ΔIOUT VFBB VIN = 5V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over-temperature from -40°C to +105°C, unless otherwise stated. (Continued) CONDITIONS See graphs and component recommendations MIN TYP 90 70 PI mode, R1 = 10k and C3 = 4.7nF over a load range of 0mA to 300mA (tested), 0-ILIMIT_ONSET (by design) TA = +25°C 1.192 1.188 ACCBOOST tSS AVDD Output Accuracy Soft-start Period for AVDD TA = +25°C CDEL = 220nF -1.5 9.6 0.4 0.1 1.205 1.205 100 1.5 0.5 1.218 1.222 +1.5 MAX UNIT % mΩ %/V % V V % ms DESCRIPTION Peak Efficiency Switch ON-Resistance Line Regulation Load Regulation Boost Feedback Voltage VLOGIC BUCK DMAX_buck typical maximum duty cycle = 0.85*(VINL-ILOAD*0.3) ILOAD_min, Minimum 1mA for VINL-VBUCK >1.5V, 5mA otherwise VBUCK IBUCK EFFBUCK RDS-ONBK ΔVBUCK/ΔVIN ΔVBUCK/ΔIOUT VFBL Buck Output Voltage Buck Switch Current Peak Efficiency Switch ON-Resistance Line Regulation Load Regulation FBL Regulation Voltage PI mode, R1 = 2k and C3 = 4.7nF over a load range of 0mA to 300mA (tested), 0-ILIMIT_ONSET (by design) IDRVL = 1mA, TA = +25°C IDRVL = 1mA ACCLOGIC tSS(L) VLOGIC Output Accuracy Soft-Start Period for V(Logic) TA = +25°C C(VREF) = 220nF (Note - no soft-start if EN asserted HIGH before ENB) 1.176 1.174 -2 0.5 Output current = 0.5A Current limit See graphs and component recommendations VREF 2.0 2.7 92 200 0.1 0.04 1.2 1.2 455 1 0.5 1.224 1.226 +2 4 V A % mΩ %/V % V V % ms NEGATIVE (VOFF) CHARGE PUMP VOFF ILOAD_NCP_MIN rON(NOUT)H rON(NOUT)L IPU(NOUT)LIM IPD(NOUT)LIM I(NOUT)LEAK VFBN VOFF Output Voltage Range External Load Driving Capability High-Side Driver ON-Resistance at NOUT Low-Side Driver ON-Resistance at NOUT Pull-up Current Limit in NOUT Pull-down Current Limit in NOUT Leakage Current in NOUT FBN Regulation Voltage 2X Charge Pump VSUP > 5V I(NOUT) = +60mA I(NOUT) = -60mA V(NOUT) = 0V to V(SUP)-0.5V V(NOUT) = 0.36V to V(VSUP) V(FBN) < 0 or EN = LOW IDRVN = 0.2mA, TA = +25°C IDRVN = 0.2mA ACCN D_NCP_max rPD(FBN)OFF VOFF Output Accuracy Max Duty Cycle of the Negative Charge Pump Pull-Down Resistance, Not Active I(FBN) = 500µA 2 IOFF = 1mA, TA = +25°C -2 0.173 0.171 -3 50 3 4 0.203 0.203 60 270 -200 -60 2 0.233 0.235 +3 -VSUP+1.4V 30 10 5 0 V mA Ω Ω mA mA µA V V % % kΩ 3 FN7493.2 March 15, 2007 ISL97651 Electrical Specifications PARAMETER VIN = 5V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over-temperature from -40°C to +105°C, unless otherwise stated. (Continued) CONDITIONS MIN TYP MAX UNIT DESCRIPTION POSITIVE (VON) CHARGE PUMP VON ILOAD_PCP_MIN VON Output Voltage Range External Load Driving Capability 2X or 3X Charge Pump VON = 25V (2X Charge Pump) VON = 34V (3X Charge Pump) rON(VSUP_SW) rON(C1/2-)H rON(C1/2-)L IPU(VSUP_SW) IPU(C1/2-) IPD(C1/2-) I(POUT)LEAK VFBP ON-Resistance of VSUP Input Switch I(SWITCH) = +40mA High-Side Driver ON-Resistance at C1- and C2Low-Side Driver ON-Resistance at C1- and C2Pull-Up Current Limit in VSUP Input Switch I(C1/2-) = +40mA I(C1/2-) = -40mA V(C2+) = 0V to V(SUP) - 0.4V - V(DIODE) 40 40 VSUP + 2V 20 20 10 10 4 100 100 -100 -5 1.176 1.172 -2 50