Advanced Analog Technology, Inc. AAT1109 Details are subject to change without notice. ONE-CHANNEL STEP-UP PWM CONTROLLER FEATURES GENERAL DESCRIPTION z Under-Voltage Lockout (UVLO) Protection z Totem Pole Output z Output Short Circuit Protection z Soft-Start Function z Wide Operating Frequency： The AAT1109 is a one-channel step-up PWM controller incorporating a soft-start and a short circuit protection (SCP) function. This device consists of an on-chip voltage reference, error amplifier, pulse width modulation controller, under-voltage lockout protection, soft-start, and short circuit protection circuits. Switching frequency up to 1MHz is set by an external resistor and capacitor. Soft-start time can be implemented by the SCP capacitor. Additionally, a chip-enable feature is also provided to power down and reduce the current supply to 10µA . With the minimal external components, 10 kHz to 1MHz z Shutdown Control z Low Dissipation Current : Typical 1.6mA in Operation z SOP-8 & TSSOP-8 Package Available PIN CONFIGURATION the AAT1109 offers a simple and economical solution. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 1 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 NAME I/O DESCRIPTION CE I Chip Enable Input Pin（Internal Pull "H"） SCP I Soft-Start and SCP Capacitor Connection Pin VDD - Power Supply OUT O Totem Pole Type Output Pin GND - Ground OSC O Capacitor and Resistor Connection Pin for Setting the Oscillation Frequency OE O Output Pin of Error Amplifier I Inverting Input Pin of Error Amplifier IE ABSOLUTE MAXIMUM RATINGS CHARACTERISTICS Supply Voltage SYMBOL VDD VALUE 7 UNIT V Output Current IO − 120 / + 120 mA Operating Free-Air Temperature Range TC − 20 to + 85 o Tstorage − 45 to + 125 o Pd 500 Storage Temperature Range Power Dissipation C C mW RECOMMENDED OPERATING CONDITIONS SYMBOL VDD VI C OSC MIN 2.6 0.5 MAX 6.5 1.6 100 10,000 UNIT V V pF Oscillator (OSC) Resistance R OSC 1.0 10.0 kΩ Oscillator (OSC) Frequency f OSC 10 1,000 kHz + 30 / − 30 mA Supply Voltage Error Amplifier Input Voltage Oscillator (OSC) Capacitance Output Current IO Operating Free-Air Temperature TC − 20 + 85 o C – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 2 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 ELECTRICAL CHARACTERISTICS, VDD = 3.3V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) OSCILLATOR PARAMETER SYMBOL Oscillation Frequency f OSC Frequency Variation with Temperature f ∆T Frequency Input Stability f ∆V TEST CONDITION C OSC =270pF R OSC = 4.2kΩ MIN TYP MAX UNIT 400 500 TC = −20 o C to o + 85 C VDD = 2.6V to 6.5V 600 kHz 5 % 1 % UNDER-VOLTAGE PROTECTION PARAMETER TEST CONDITION Upper Threshold Voltage VUPH TC = 25 C MIN TYP MAX UNIT V 2.12 2.47 2.85 Lower Threshold Voltage VUPL 1.96 2.28 Hysteresis (VUPH − VUPL ) TC = 25o C VHYS TC = 25o C 0.19 o Note 1: Typical values of all parameters are specified at TC V 2.63 V = 25o C . SHORT CIRCUIT PROTECTION CONTROL PARAMETER TEST CONDITION Input Threshold Voltage Short-Circuit Detection Threshold Voltage Charging Current MIN TYP MAX UNIT Vr1 1.160 1.262 1.360 V Vr 2 1.160 1.262 1.360 V − 2.15 − 1.50 − 1.00 µA I SCP VSCP = 0V I CS TEST CONDITION VSCP = 0V SOFT-START PARAMETER Charging Current Voltage at Soft-Start Completion Vts MIN TYP MAX UNIT − 2.15 − 1.50 − 1.00 µA 1.160 1.262 1.360 V SHUTDOWN CONTROL PARAMETER TEST CONDITION Shutdown Enable Voltage VSE Shutdown Release Voltage VSR MIN TYP MAX UNIT 0.5 2.0 V V – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 3 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 ELECTRICAL CHARACTERISTICS, VDD = 3.3V (UNLESS OTHERWISE SPECIFIED (SEE NOTE 1) IDLE PERIOD ADJUSTMENT SECTION PARAMETER t Duty Maximum Duty Cycle TEST CONTION MIN TYP MAX UNIT , C OSC = 270pF 75 85 93 % R OSC = 4.2kΩ , VOE = 1.12V EA (ERROR AMPLIFIER) PARAMETER Input Threshold Voltage VT Input Stability VT Variation with Temperature Input Bias Current VT TEST CONDITION VOE = 0.7V TYP MAX UNIT 1.249 1.262 1.275 V mV VT∆V VDD = 2.6 to 6.5V 2 VT∆T TC = −20 o C to + 85o C 1 IB VOS+ Output Voltage Swing MIN 0.1 1.4 VOS− 8 % 1.0 1.7 0.05 0.20 µA V Output Sink Current I OS+ VOE = 0.7V 3 20 Output Source Current I OS− VOE = 0.7V − 45 − 75 mA µA Open-Loop Voltage Gain A VO 70 85 dB OUTPUT SECTION PARAMETER TEST CONDITION TYP MAX UNIT High-Level Output Voltage VOH I o = −30mA Low-Level Output Voltage VOL I o = +30mA 0.8 Rise Time t RISE C L = 1,000pF 100 ns Fall Time t FALL C L = 1,000pF 100 ns 1.9 2.3 V 1.2 V OPERATING CURRENT PARAMETER Supply Current TEST CONDITION MIN TYP MAX UNIT I DD−OFF Output ”OFF” State 1.3 mA I DD−ON R OSC = 4.2kΩ 1.6 mA – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 4 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 HOW TO SET THE TIME CONSTANT FOR SOFT-START AND SHORT CIRCUIT PROTECTION 1. Soft-Start AAT1109 operates in soft-start mode. The PWM comparator monitors the voltage at soft-start setting and SCP pin, which varies proportionally to each other. This proportion relation controls the ON duty of the OUT pin and activates the soft-start operation. In the Soft-start mode, the voltage at SCP pin ( VSCP ) is input to the PWM comparator, so that the ON duty of the OUT pin is determined by the VSCP . When the soft-started mode is completed, its setting voltage remains high and the circuit enters the output short circuit protection wait state while VSCP remains low. Soft-Start Time t s (sec ) ~ 0.84 × CSCP (µF) 2. Short Circuit Protection In response to a sudden drop of the switching regulator output, the device locks the error amplifier, OE pin, at VOS+ , and starts feeding currents into the capacitor at SCP pin to achieve in a voltage value of approximately 0.84V at this pin. This chain reaction protects the circuit by keeping the SCP pin and output pin low. Users could reverse this process by restarting the device. Short Circuit Detection Time t SCP (sec ) ~ 0.84 × CSCP (µF ) – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 5 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 BLOCK DIAGRAM V DD CE C h ip E n a b le GND IREF VREF 1 .2 6 V SCP C om p. LA TCH CE S o ft-S ta rt SCP SCP OSC OSC UVC UVC CE UVLO VREF V DD V REF PW M Com p. 1 .2 6 V CE OE CE DTC 0 .7 6 5 V V DD V REF 1 .2 6 V E rr-A m p OUT IE UVC CE – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 6 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 APPLICATION CIRCUIT 1 BOOST (STEP-UP) – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 7 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 APPLICATION CIRCUIT 2 (WITH CHARGE PUMP) V OUT VP ≅ 3 * Vout V N ≅ − V out – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 8 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 BOOST （STEP-UP）TIMING CHART – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 9 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PACKAGE DIMENSION 8-PIN SOP θ SYMBOLS DIMENSIONS IN MILLIMETERS DEMINSIONS IN INCHES MIN TYP MAX MIN TYP MAX A 1.47 1.60 1.73 0.058 0.063 0.068 A1 0.10 --- 0.22 0.004 --- 0.008 A2 --- 1.45 --- --- 0.057 --- b 0.33 0.41 0.51 0.013 0.016 0.020 C 0.19 0.20 0.25 0.0075 0.008 0.0098 D 4.80 4.85 4.95 0.189 0.191 0.195 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e --- 1.27 --- --- 0.050 --- L 0.38 0.71 1.27 0.015 0.028 0.050 y --- --- 0.076 --- --- 0 θ 0 --- 0 0 --- 0 – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 10 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 TAPE AND REEL 8-PIN SOP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 11 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 TAPE AND REEL 8-PIN SOP (CONT.) NOTE: 1. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2 MILLIMETERS. 2. CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS 3. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. 4. A 0 AND B 0 ARE MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. 5. K 0 IS MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF 6. THE CARRIER. POCKET POSITION RELATIVE TO SPROCKET HOLE IS MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 12 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PACKAGE DIMENSION TSSOP-8 – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 13 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PACKAGE DIMENSION TSSOP-8 SYMBOL A A1 A2 b C D E E1 e L y θ DIMENSION IN MILLIMETERS MIN TYP MAX 1.05 1.10 1.20 0.05 0.10 0.15 ----1.00 1.05 0.25 ----0.30 ----0.127 ----2.90 3.05 3.10 6.20 6.40 6.60 4.30 4.40 4.50 ----0.65 ----0.50 0.60 0.70 --------0.076 o o 0 8o 4 DIMENSION IN INCHES MIN TYP MAX 0.041 0.043 0.047 0.002 0.004 0.006 ----0.039 0.041 0.010 ----0.012 ----0.005 ----0.114 0.120 0.122 0.244 0.252 0.260 0.169 0.173 0.177 ----0.026 ----0.020 0.024 0.028 --------0.003 o o 0 8o 4 NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS. 2. LEAD FRAME MATERIAL: OLIN C7025/EFTEC 64T. 3. DIMENSION “D” DOES NOT INCLUDE MOLD FLASH, TIE BAR BURRS AND GATE BURRS. MOLD FLASH, TIE BAR BURRS AND GATE BURRS SHALL NOT EXCEED 0.006” [0.15 MILLIMETERS] PER END. DIMENSION “E1” DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010” [0.25 MILLIMETERS] PER SIDE. 4. DIMENSION “b” DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.003” [0.08 MILLIMETERS] TOTAL IN EXCESS OF THE “b” DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSION AND AN ADJACENT LEAD TO BE 0.0028” [0.07 MILLIMETERS]. 5. TOLERANCE: ± 0.010” [0.25 MILLIMETERES] UNLESS OTHERWISE SPECIFIED. 6. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC. 7. REFERENCE DOCUMENT: JEDEC SPEC MO-153. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 14 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 TAPE AND REEL TSSOP-8 – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 15 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 TAPE AND REEL TSSOP-8 (CONT.) X.XXX X ± 0.0025 ± 0.006 X.XXX ± 0.025 X.XX ± 0.10 X.X ± 0.25 X UNIT: MILLIMETERS NOTE: 1. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2 MILLIMETERS. 2. CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS. 3. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. 4. A 0 AND B 0 ARE MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. 5. K 0 IS MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF THE CARRIER. 6. POCKET POSITION RELATIVE TO SPROCKET HOLE IS MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 16 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PART MARKING SOP8 TOP MARKING AAT1109 XXXXXX SOP8 BACK MARKING YYWW PART MARKING TSSOP8 TOP MARKING AAT1109 XXXXXX TSSOP8 BACK MARKING YYWW – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 17 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 ORDERING INFORMATION – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 18 of 18 V 1.0