Advanced Analog Technology, Inc. AAT1105A Details are subject to change without notice. BUCK_BOOST & BOOST PWM CONTROLLER Features General Description z The AAT1105A provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system. This device offers system engineers the flexibility to tailor-make the power supply circuitry for specific applications. Each channel contains its own error amplifier, PWM comparator, dead–time control (DTC), and output driver. The under-voltage protection, oscillator, short circuit protection (SCP) and voltage reference circuit are the common features for the two channels. The AAT1105A contains one step-up (boost) circuit at channel two (CH2) and one inverting (buck_boost) circuit at channel one (CH1). Dead-time control can be set to provide 0% to 100% dead-time through a resistive divider network. Soft-start can be implemented by paralleling the DTC resistor with a capacitor. Two dead-time control inputs are assigned for CH1 and CH2 individually, and dead-time control inputs can be used to control on / off operation. The compact design and optimized external parts of AAT1105A offers a simple and effective solution. Complete PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost z Under-Voltage Lockout (UVLO) Protection z Totem Pole Output z Output Short Circuit Protection z Dead-Time Control：0% to 100% z Wide Operating Frequency： 10kHz to 800kHz z Shutdown Control z Power Good Protection z VDD Range: 2.6V~6.5V Pin Configuration TOP VIEW Ct 1 16 VREF Rt 2 15 SCP SHDN 3 14 PGO IE1 4 13 IE2 OE1 5 12 OE2 DTC1 6 11 DTC2 OUT1 7 10 OUT2 GND 8 9 VDD (TSSOP-16 PACKAGE) – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 1 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Pin Description Pin No Name Ct 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Rt SHDN IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 PGO SCP VREF I/O Description - External Timing Capacitance - External Timing Resistance I I O I O O I O I O O Shutdown Input Pin（Internal Pull "H"） Inverting Input of Error Amplifier 1 Output for Error Amplifier 1 Output 1 Dead-Time / Soft-Start Setting Output 1 Ground Power Supply Output 2 Output 2 Dead-Time / Soft-Start Setting Output of Error Amplifier 2 Inverting Input of Error Amplifier 2 Power Good Output Pin Timer Latch Setting Reference Voltage (1.293V) Output – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 2 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Absolute Maximum Ratings CHARACTERISTICS Supply Voltage Input Voltage ( IE − , DTC, SHDN) VALUE 7 VDD Output Voltage SYMBOL VDD VI VO VDD +0.3 UNIT V V 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 Vcm Min 2.6 0.3 Unit V V 0 Max 6.5 1.5 VDD VO Oscillator (OSC) Capacitance C OSC 100 15,000 pF Oscillator (OSC) Resistance R OSC 3 50 kΩ Oscillator (OSC) Frequency Output Current, I out1 , I out 2 f OSC 10 800 kHz +50/ − 50 mA Operating Free-Air Temperature TC Supply Voltage, VDD Input Voltage, IE1, IE2 Output Voltage IO − 20 85 V o C – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 3 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) Oscillator Parameter Test Condition Min Typ C OSC = 220pF, R OSC = f OSC 320 400 Frequency 5.6kΩ VDD = 2.6V to 6.0V, TC = 25 oC Frequency Changes with f ∆V 1 VDD C OSC = 220pF, R OSC = 5.6kΩ Max Unit 480 kHz - % Under-Voltage Protection Parameter Test Condition Upper Threshold Voltage Lower Threshold Voltage Hysteresis ( VUPH – VUPL ) VUPH VUPL VHYS Min Typ Max Unit o 1.81 2.03 2.25 V o 1.57 1.79 2.01 V o - 0.24 - V TC = 25 C TC = 25 C TC = 25 C Short Circuit Protection Control Parameter Test Condition Min Typ Max Unit Input Threshold Voltage Vr 2 CH2 1.81 1.29 1.40 V Input Threshold Voltage Short-Circuit Detect Threshold Voltage SCP Terminal Source Current Stand-by Voltage Latch Voltage Vr1 CH1 0.30 0.37 0.44 V Vtscd 0.76 0.85 0.94 V I SCP − 3 .8 − 2 .6 − 1 .4 µA 50 30 100 100 mV mV Min Typ Max Unit - - 0.5 V 2.0 - - V VSTB VLT Shutdown Control Parameter Test Condition Shutdown Enable Voltage Shutdown Release Voltage VSE VSR o TC = 25 C o TC = 25 C Note 1: Typical values of all parameters are specified at TC =25 oC. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 4 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.) Reference Voltage Parameter Test Conditions Min Typ Max Internal Reference Voltage VREFi I REF = −1mA , TC = 25 C 0.622 0.641 0.660 Reference Voltage VREF I REF = −1mA , TC = 25 oC 1.280 1.293 1.306 Input Voltage Regulation VRI Output Regulation VRO o I REF = −1mA , VDD = 2.6V to 6.0V I REF = −0.1mA to − 1 mA Unit V - 1 10 mV - 1 6 mV Min Typ - - 6 mV 0.5 ±15 - ±100 1.5 nA V A VO 70 85 - dB VOS+ 1.7 2.0 - VOS− - 0.2 0.4 EA (Error Amplifier) Parameter Test Condition Input Offset Voltage VIO CH1,CH2, Unity Gain Input Bias Current Input Voltage Range Open-Loop Voltage Amplification I IB VIR CH1, CH2 CH1, CH2 Output Voltage Swing Max Unit V Output Sink Current I OS+ OE=0.65V 3 10 - mA Output Source Current I OS− OE=0.65V - − 65 − 45 µA 60 80 - dB Min Typ - 0.2 Common-Mode Rejection Ratio CMRR PRDB (Power Good Protection) Parameter Test Condition Low Level Output Voltage Vdbl Pull-High R 20 = 100kΩ Max Unit 0.4 – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 5 of 16 V 1.0 V Advanced Analog Technology, Inc. AAT1105A Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.) Dead Time Control & PWM Parameter Test Condition Min Typ Max Unit I IB VDTC = 1.0V Input Bias Current 0.1 1.0 µA V1d 0 Duty = 0%, f OSC = 10kHz 0.92 1.00 1.08 V1d100 Duty = 100%, f OSC = 10kHz 0.48 0.56 0.64 V2d 0 Duty = 0%, f OSC = 10kHz 0.48 0.56 0.64 V2d100 Duty = 100%, f OSC = 10kHz 0.92 1.00 1.08 Latch Input Voltage (DTC1) V1DTC I DTC = 20µA 1.15 1.20 - V Latch Input Voltage (DTC2) Latch Mode Source Current (DTC1) Latch Mode Source Current (DTC2) V2 DTC I DTC = 50µA - 0.2 0.4 V I1DTC DTC1=1.08V - − 45 − 30 µA I 2 DTC DTC2=0.48V 150 200 - µA Input Threshold (DTC1) Voltage Input Threshold (DTC2) Voltage V V Output Stage Parameter Test Condition High-Level Output Voltage VOH I O = − 50 mA Min 1.8 Low-Level Output Voltage VOL I O =+50mA - 0.8 1.2 V Rise Time t RISE C L =1,000pF - 100 - ns Fail Time Leakage Current Capacitance at the Output Pin t FALL I LEAK C L =1,000pF - 100 - ns VO =6.0V - - 5 µA Min Typ - 1.8 - 2.0 CL Typ 2.2 Max Unit V Operating Current Parameter Supply Current Test Condition I DD−OFF I DD−ON Output “OFF” State R OSC = 10kΩ Max Unit mA - – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 6 of 16 V 1.0 mA Advanced Analog Technology, Inc. AAT1105A Block Diagram OE1 IE1 VDD Vr1 VREFi 1.233V Err-Amp SCP Comp OUT1 PWM GND Vr2 UVC VREFi 1.233V VDD OUT2 IE2 OE2 Err-Amp PWM VREF Ct UVC DTC1 OSC Rt DTC2 UVC UVC LATCH VDD LATCH UVLO SCP VDD PGO SCP UVC SHDN SHUTDOWN CONTROL VREF VREF VREF – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 7 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Application Circuit 1 VDD C11 U1 VDD PGO Q1 OUT1 VN1 VN1 R5 D1 OE1 L1 C1 R1 C9 IE1 R2 AAT1105A VREF VP2 L2 R6 OE2 VP2 C2 R3 D2 Q2 IE2 OUT2 R4 C10 SHDN SHDN VREF R7 Ct R9 C5 C20 DTC1 Rt DTC2 C4 GND Ct R8 R10 SCP Rt CSCP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 8 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Application Circuit 2 Optional Circuit 3: for power good protection VDD Optional Circuit: Positive charge pump circuit Q3 R20 C11 VP3 PGO U1 VDD PGO D4 OUT1 VN1 Q1 R5 D1 OE1 R1 L1 C1 VN1 C7 D3 C8 PGO C9 R12 IE1 R2 R11 Q4 AAT1105 VREF L2 VP2 R6 OE2 R3 C2 IE2 Optional Circuit 2: for Vp3 discharge VP2 D2 Q2 OUT2 R4 C10 SHDN SHDN C13 VN2 VREF R7 Ct R9 C5 D6 DTC1 Rt C14 DTC2 C4 GND Ct D5 C20 R8 Optional Circuit : Negative charge pump circuit R10 SCP Rt CSCP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 9 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Buck-Boost（Inverting） Timing Chart （CH1） 1.0V OE DTC 0.37V 0.56V PWM OUTPUT OUTPUT 0.85V SCP tSCP SCP COMP 2.03V VDD LOCKOUT FREE PGO Note: t SCP ≅ C SCP Vr 2 I SCP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 10 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Boost （Step-up）Timing Chart （CH-2） 1.29V 1.0V DTC OE 0.56V PWM OUTPUT OUTPUT 0.85 V SCP tSCP SCP COMP 2.03V VDD LOCKOUT FREE PGO Note: t SCP ≅ C SCP Vr 2 I SCP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 11 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Package Dimension 16-Pin TSSOP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 12 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Package Dimension (Cont.) SYMBOLS DIMENSIONS IN MILLIMETERS DEMINSIONS IN INCHES MIN TYP MAX MIN TYP MAX A 1.05 1.10 1.20 0.041 0.043 0.047 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 ------ 1.00 1.05 ------ 0.039 0.041 b 0.20 0.25 0.28 0.008 0.010 0.011 C ------ 0.127 ------ ------ 0.005 ------ D 4.900 5.075 5.100 0.1930 0.1998 0.2000 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.170 0.173 0.177 e ------ 0.65 ------ ------ 0.026 ------ L 0.50 0.60 0.70 0.020 0.024 0.028 y ------ ------ 0.076 ------ ------ 0.003 θ 0 o 4 o 8 o 0 o 4 o 8o 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 MILLIMETERS] 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 13 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Tape and Reel – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 14 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Tape and Reel (Cont.) NOTE: 1. 2. 3. 4. 5. 6. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2 MILLIMETERS. CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. A 0 AND B 0 MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. K 0 MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF THE CARRIER. POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. Part Marking TSSOP16 Top Marking AAT1105A XXXXXX TSSOP16 Back Marking YYWW – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 15 of 16 V 1.0 Advanced Analog Technology, Inc. AAT1105A Ordering Information – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 16 of 16 V 1.0