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| Advanced Analog Technology, Inc. AAT1118 Details are subject to change without notice. ADJUSTABLE TRIPLE-CHANNEL TFT LCD DC-DC CONVERTER Features Built in 1.6A, 0.2 Switching NMOS Fault and Thermal Protection Internal Soft-Start Function Internal Power Up Sequencing Dual Adjustable Charge Pump Output Positive Output to 40V Negative Output to - 40V Power Good Output TSSOP-16 Package General Description The AAT1118 is an adjustable triple-channel TFT LCD DC-DC converter that provides one current mode PWM, one positive charge pump and one negative charge pump. Built-in functions include soft-start and power up sequencing. When power is turned on, soft-start avoids inrush current. Power up sequencing feature provides compensation for LCD panel to maintain a smooth voltage during a turn-on cycle. The DC-DC converter consists of an on-chip voltage reference, error amplifier, current sense, pulse width modulation controller, under-voltage lockout protection, thermal detect, soft-start, and fault protection circuit. When the two charge pumps are in operation, the output voltage would be doubled and the generated VP3 and VP2 could switch on or off TFT gate. With the minimal external components, the AAT1118 offers a simple and economical solution for TFT LCD power. Pin Configuration (Top View) (TSSOP-16 Package) - - - Advanced Analog Technology, Inc. - Page 1 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Ordering Information DEVICE TYPE AAT1118 PART NUMBER AAT1118-T1-T TEMP. RANGE -40 C to +85 C MARKING DESCRIPTION 1. Part Name 2. Lot No. (6~9 digits) PACKAGE PACKING MARKING AAT1118 XXXXXX T1:TSSOP16 T: Tape and reel NOTE: All AAT Products are Lead Free and Halogen Free. Description PIN NO. NAME I/O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PGO IN1 EO O I I O I I I O O O HV Switch Output Inverting Input Pin of PWM Error Amplifier Output Pin of PWM Error Amplifier Power Supply Ground Reference Voltage Output Charge Pump Channel 3 Feedback Input Charge Pump Channel 2 Feedback Input Shutdown Control Pin; High for Enable Charge Pump Channel 2 Output High Voltage Power Supply Charge Pump Channel 3 Output High Voltage Power Supply Ground Switch Pin SW MOS Ground DESCRIPTION VDD GND VREF IN3 IN2 SHDN OUT2 VDD1 OUT3 VDD2 GND2 SW GND1 - - - Advanced Analog Technology, Inc. - Page 2 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Absolute Maximum Ratings PARAMETER SYMBOL VALUE 7 18 16 VDD +0.3 UNIT V V V V V V VDD to GND SW to GND VDD VSW VDD1 , VDD2 to GND Input Voltage 1 (IN1, IN2, IN3, SHDN) Output Voltage 1 (EO, VREF ) Output Voltage 2 (OUT2, OUT3, SW, PGO) Operating Free-Air Temperature Range Storage Temperature Range VDDH V I1 VO1 VO2 TC VDD +0.3 VDDH +0.3 - 40 to + 85 - 45 to + 125 C C mW Tstorage Pd Power Dissipation 750 - - - Advanced Analog Technology, Inc. - Page 3 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Electrical Characteristics, VDD= 3.3V, VDDH= 10V Operating Power PARAMETER Input Supply Voltage Range VDD Under Voltage Lockout SYMBOL VDD VUVLO TEST CONDITION Falling Rising MIN TYP MAX UNIT 5.5 V 2.6 2.1 2.2 2.3 V 2.5 V 2.3 2.4 6 14 0.5 3 0.1 160 0.8 6 10.0 V mA mA A Regulated Output Voltage Range Quiescent Current Shutdown Current Thermal Shutdown VP1 I VDD I SHDN VIN1 =1.3V, not switching VIN1 =1.1V, switching VSHDN =GND C Reference Voltage PARAMETER Reference Voltage Line Regulation Load Regulation SYMBOL TEST CONDITION VREF IVref = 100A IVref = 100A, VRI VDD =2.5V~5V VRO IVref = 0~100A MIN TYP MAX UNIT 1.238 1.250 1.262 V 2 1 5 5 mV mV EA (Error Amplifier) PARAMETER Feedback Voltage Input Bias Current Feedback-Voltage Line Regulation Transconductance Voltage Gain Fault Detect Trigger Voltage SYMBOL VIN1 TEST CONDITION Level to VEO =1.24V VIN1=1.24V MIN TYP MAX UNIT V nA % /V produce 1.238 1.250 1.262 0 0.05 70 105 1,500 1.07 1.10 1.14 40 0.15 I B1 VRI gm AV VFI - - - Advanced Analog Technology, Inc. - Page 4 of 14 V 2.0011 V5.5 < 240 A /V V /V V ecudorp ot leveL VEO =1.24V VDD I=5A < V6.2 Advanced Analog Technology, Inc. AAT1118 Electrical Characteristics, VDD= 3.3V, VDDH= 10V Oscillator PARAMETER Oscillation Frequency Maximum Duty Cycle SYMBOL f OSC TEST CONDITION MIN 1,100 79 TYP 1,320 85 MAX 1,600 92 UNIT kHz % D MAX N-Channel Switch PARAMETER Current Limit On-Resistance Leakage Current SYMBOL TEST CONDITION I SW =1.2A VSW =12V MIN 1.1 TYP 1.6 0.28 0.01 MAX 2.1 0.50 20.00 UNIT A A I LIM R ON I SWOFF Control Inputs Characteristics PARAMETER Input Low Voltage Input High Voltage Hysteresis SHDN Pull Up Current SYMBOL TEST CONDITION MIN TYP VIL VIH VHYS 0.7 VDD 0.1 VDD 0.001 MAX 0.3 VDD UNIT V V V I PH 1.000 A - - - Advanced Analog Technology, Inc. - Page 5 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Electrical Characteristics, VDD= 3.3V, VDDH= 10V Soft Start & Fault Detect Time PARAMETER Channel 1 Soft Start Time Channel 2 Soft Start Time Channel 3 Soft Start Time During Fault Protect Trigger Time IN1 Fault Protection Voltage IN2 Fault Protection Voltage IN3 Fault Protection Voltage SYMBOL t SS1 t SS2 t SS3 TEST CONDITION MIN TYP 14 3.5 3.5 83 MAX UNIT ms ms ms ms t FP VF1 VF2 VF3 1.05 0.08 1.05 1.10 0.13 1.10 1.15 0.18 1.15 V V V - - - Advanced Analog Technology, Inc. - Page 6 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Electrical Characteristics, VDD= 3.3V, VDDH= 10V Charge Pump Regulator Characteristics PARAMETER VDD1 Input Supply Range VDD2 Input Supply Range IN2 Threshold Voltage IN3 Threshold Voltage IN2 Input Bias Current IN3 Input Bias Current Charge Pump Frequency SYMBOL TEST CONDITION MIN 6 6 - 50 TYP MAX 15 15 UNIT V V mV V nA nA kHz VDD1 VDD2 IN2 IN3 0 1.25 50 1.30 50 50 1.20 VIN2= - 0.05V V IN3= - 1.5V - 50 - 50 I B2 I B3 f OSCP R ONP2 540 640 3 3 3 3 740 20 20 20 20 30 mA OUT2 Switch R-on R ONN2 R ONP3 OUT3 Switch R-on R Continuous Output Current ONN3 I OUT - - - Advanced Analog Technology, Inc. - Page 7 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 BLOCK DIAGRAM AAT1118 EO SHDN Thermal SHDN Error Amplifier VDD SHDN SW IN1 Comparator Bandgap & Soft Start VREF PGO 1.24v Control Logic Driver Clock GND1 Slope Compensation Current sense GND Oscillator OSC VDD2 EN3 OUT3 OSC IN1 Power Up Sequence Fault Detect EN1 VDD1 EN2 OSC OUT2 GND2 1.24v GND2 IN3 IN2 - - - Advanced Analog Technology, Inc. - Page 8 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Typical Operating Characteristics (VIN = 3.3V, TC = +25C, unless otherwise noted.) 10.04 100 10.02 10 9.98 9.96 85 95 90 9.94 9.92 9.9 9.88 70 80 75 9.86 9.84 0 100 200 300 400 500 600 700 800 65 0 100 200 300 400 500 90 100 95 90 85 85 80 75 80 70 75 65 70 65 0 100 200 300 400 500 60 0 50 100 150 200 250 300 350 -5.8 55 -5.85 50 45 -5.9 40 -5.95 35 30 -6 25 -6.05 0 5 10 15 20 25 30 35 40 20 0 5 10 15 20 25 30 35 40 - - - Advanced Analog Technology, Inc. - Page 9 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Typical Operating Characteristics (Continued) (VIN = 3.3V, TC = +25C, unless otherwise noted.) 18.05 18 17.95 17.9 80 75 70 65 60 17.85 55 17.8 50 17.75 17.7 0 2 4 6 8 10 12 14 16 18 20 45 40 0 2 4 6 8 10 12 14 16 18 20 1.2 1.15 1.1 1.05 1 0.95 0.9 0.85 2.5 3 3.5 4 4.5 5 5.5 - - - Advanced Analog Technology, Inc. - Page 10 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Typical Operating Characteristics (Continued) (VIN = 3.3V, TC = +25C, unless otherwise noted.) - - - Advanced Analog Technology, Inc. - Page 11 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Application Circuit AAT1118 - - - Advanced Analog Technology, Inc. - Page 12 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Timing Chart AAT1118 V DD SHDN 90% 9V V P1 0V V P2 -8V 25V V P3 0V 14ms Max. 3.5ms 3.5ms PGO - - - Advanced Analog Technology, Inc. - Page 13 of 14 V 2.0011 Advanced Analog Technology, Inc. AAT1118 Package Dimension 16-Pin TSSOP Symbol A A1 A2 b C D E E1 e L y Dimensions In Millimeters Min TYP Max 1.05 1.10 1.20 0.05 0.10 0.15 -----1.00 1.05 0.20 0.25 0.28 -----0.127 -----4.900 5.075 5.100 6.2 6.4 6.6 4.3 4.4 4.5 -----0.65 -----0.5 0.6 0.7 ----------0.076 0 4 8 Dimensions In Inches Min TYP Max 0.041 0.043 0.047 0.002 0.004 0.006 -----0.039 0.041 0.008 0.010 0.011 -----0.005 -----0.1930 0.1998 0.2000 0.244 0.252 0.260 0.170 0.173 0.177 -----0.026 -----0.020 0.024 0.028 ----------0.003 0 4 8 - - - Advanced Analog Technology, Inc. - Page 14 of 14 V 2.0011 |
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