Advanced Analog Technology, Inc. AAT1351 Details are subject to change without notice 2-CHANNEL SWITCHING REGULATOR FEATURES GENERAL DESCRIPTION z Complete PWM Power Control Circuitry z Under-Voltage Lockout (UVLO) Protection z Open Drain Output z Output Short Circuit Protection z Low Dissipation Current：1.6mA z Dead-Time Control：0% to 100% z Wide Operating Frequency： The AAT1351 provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system; this device offers the systems engineer 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 and voltage reference circuit are the common features for the two channels. Both channels of AAT1351 can be used for DC-DC converter operations including step-up, step-down, and inverting. 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 channel 1 (CH1) and channel 2 (CH2) individually, and deadtime control inputs can be used to control on / off operation. With a minimum number of external components, the AAT1351 offers a simple and cost effective solution. 10 kHz to 800 kHz z VDD Range：4.0V to 14.0V PIN CONFIGURATION TOP VIEW Ct 1 16 VREF Rt 2 15 SCP NE1 3 14 NE2 IE1 4 13 IE2 OE1 5 12 OE2 DTC1 6 11 DTC2 OUT1 7 10 OUT2 GND 8 9 VDD SOP-16 PACKAGE – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 1 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 PIN DESCRIPTION PIN NO NAME 1 Ct 2 Rt 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NE1 IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 NE2 SCP VREF I/O DESCRIPTION I External Timing Capacitance I External Timing Resistance I I I I O Noninverting Input of Error Amplifier 1 Inverting Input of Error Amplifier 1 Output of Error Amplifier 1 Output 1 Dead-Time / Soft-Start Setting Output 1 Ground I Power Supply O Output 2 I Output 2 Dead-Time / Soft-Start Setting I Output of Error Amplifier 2 I Inverting Input of Error Amplifier 2 I Noninverting Input of Error Amplifier 2 I Timer Latch Setting O Reference Voltage (2.5V) Output – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 2 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 ABSOLUTE MAXIMUM RATINGS CHARACTERISTICS VALUE 14.0 VDD UNIT V V Output Voltage SYMBOL VDD VI VO VDD +0.3 V Output Current IO 120 mA Operating Free-Air Temperature Range TC − 20 to +85 o Tstorage − 45 to +125 o Pd 500 Supply Voltage Input Voltage ( IE − , DTC) Storage Temperature Range Power Dissipation C C mW RECOMMENDED OPERATING CONDITIONS SYMBOL VDD Vcm MIN 4.0 MAX 14.0 UNIT V 0.5 1.6 V VO 0 VDD V Oscillator (OSC) Capacitance C OSC 100 15,000 pF Oscillator (OSC) Resistance R OSC 5.1 50.0 kΩ Oscillator (OSC) Frequency Output Current, I OUT1 , I OUT 2 f OSC 10 800 kHz IO - 100 mA TC − 20 85 Supply Voltage, VDD Input Voltage, IE1, IE2 Output Voltage Operating Free-Air Temperature o C – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 3 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) OSCILLATOR PARAMETER TEST CONDITION Frequency Frequency Changes with VDD f OSC C OSC = 330pF, R OSC = 10 kΩ f ∆V VDD = 4.0V to 14.0V, TC = 25 oC C OSC = 330pF, R OSC = 10 kΩ UNDER VOLTAGE PROTECTION PARAMETER Upper Threshold Voltage VUPH TEST CONDITION TC = 25 oC Lower Threshold Voltage VUPL TC = 25 oC Hysteresis ( VUPH – VUPL ) VHYS TC = 25 oC SHORT CIRCUIT PROTECTION CONTROL PARAMETER TEST CONDITION Input Threshold Voltage Vr1 Short Circuit Detect Threshold Voltage CH1, CH2 MIN TYP MAX UNIT 160 200 240 kHz - 1 - % MIN TYP MAX UNIT 2.9 V 2.53 V 0.37 V MIN TYP MAX UNIT - 1.18 - V Vr 2 0.65 0.70 0.75 V SCP Terminal Source Current I SCP − 20 − 15 − 10 µA Stand-by Voltage Latch Voltage VSTB VLT - 50 30 100 100 mV mV 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 V1.0 Advanced Analog Technology, Inc. AAT1351 ELECTRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.) REFERENCE VOLTAGE PARAMETER Reference Voltage VREF Input Voltage Regulation VRI Output Regulation VRO EA (ERROR AMPLIFIER) PARAMETER Input Offset Voltage VIO Input Bias Current Input Voltage Range I IB VIR A VO Open-Loop Voltage Gain Output Voltage Swing TEST CONDITION I REF = −1mA , TC = 25 oC I REF = −1mA , VDD = 4.0V to 14.0V I REF = −0.1mA to − 3.0 mA TEST CONDITION CH1, CH2, Unity Gain MIN TYP MAX UNIT 2.4 2.5 2.6 V - 1 5 mV - 1 10 mV MIN TYP MAX UNIT - - 6 mV 0.5 ±15 - ±100 1.6 nA V 70 85 - dB VOS+ 2.3 2.5 - VOS− - 0.7 0.9 CH1, CH2 CH1, CH2 V Output Sink Current I OS+ OE=1.25V 3 20 - mA Output Source Current I OS− OE=1.25V − 75 − 45 - µA 60 80 - dB Common-Mode Rejection Ratio CMRR – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 5 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 ELETRICAL CHARACTERISTICS, VDD = 6.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.) DEAD-TIME CONTROL & PWM PARAMETER I IB Input Bias Current TEST CONDITION VDTC = 2V MIN TYP MAX UNIT - 0.1 1.0 Vd 0 Duty = 0%, f OSC = 10kHz 1.79 1.97 2.15 Input Threshold Voltage (DTC) µA V Vd100 Duty = 100%, f OSC = 10kHz 1.32 1.48 1.64 Latch Input Voltage VDTC IDT = 40µA 2.28 2.48 - V Latch Mode Source Current I DTC − 560 − 200 - µA OUTPUT STAGE PARAMETER Saturation Voltage VSAT Leakage Current I LEAK OPERATING CURRENT PARAMETER Supply Current DTC1, DTC2=0V TEST CONDITION MIN IO = 75mA（CH1, CH2） VO =14.0V - TEST CONDITION MIN TYP MAX UNIT 0.8 1.2 - 5 V µA TYP MAX UNIT I DD−OFF Output “OFF” State - 1.3 1.8 mA I DD−ON R OSC = 10kΩ - 1.6 2.4 mA – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 6 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 BLOCK DIAGRAM OE1 NE1 IE1 OUT1 SCP Comp Err-Amp PWM GND UVC NE2 OUT2 IE2 Err-Amp OE2 PWM V REF Ct UVC DTC1 OSC Rt V REF UVC UVC DTC2 LATCH V DD UVLO V DD LATCH SCP V REF SCP V REF V REF UVC – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 7 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 APPLICATION CIRCUIT VREF – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 8 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 TIMGING CHART 2.05V OE DTC 1.18V 1.45V PWM OUTPUT OUTPUT 0.7V SCP tSCP SCP COMP 2.53V VDD LOCKOUT FREE 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 9 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 PACKAGE DIMENSION 16-PIN SOP – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 10 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 PACKAGE DIMENSION (CONT.) – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 11 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 PACKAGE DIMENSION (CONT.) SYMBOLS A A1 A2 b C D E E1 e L y θ DIMENSIONS IN MILLIMETERS MIN TYP MAX 1.47 1.60 1.73 0.10 -----0.25 -----1.45 -----0.33 0.41 0.51 0.19 0.20 0.25 9.80 9.91 10.01 5.79 5.99 6.20 3.81 3.91 3.99 -----1.27 -----0.38 0.71 1.27 ----------0.076 o -----0 8o DEMINSIONS IN INCHES MIN TYP MAX 0.058 0.063 0.068 0.004 -----0.010 -----0.057 -----0.013 0.016 0.020 0.0075 0.0080 0.0098 0.386 0.390 0.394 0.228 0.236 0.244 0.150 0.154 0.157 -----0.050 -----0.015 0.028 0.050 ---------0.003 o -----0 8o NOTE: 1. 2. 3. 4. 5. 6. 7. CONTROLLING DIMENSION: INCH LEAD FRAME MATERIAL: COPPER 194 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 SAHLL NOT EXCEED 0.010” [0.25 MILLIMETERS] PER SIDE. 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]. TOLERANCE: ± 0.010” [0.25 MILLIMETERS] UNLESS OTHERWISE SPECIFIED. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC. REFERENCE DOCUMENT: JEDEC SPEC MS-012 – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 12 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 TAPE AND REEL – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 13 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 TAPE AND REEL (CONT.) X.XXX X ± 0.0025 X.XXX ± 0.006 X.XX ± 0.025 X.X ± 0.10 X ± 0.25 UNIT: MILLIMETERS NOTE: 1. 2. 3. 4. 5. 6. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2. CHAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS. MATERIAL: 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. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 14 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 PART MARKING SOP16 TOP MARKING AAT1351 BXXXXX.X YYWW TAIWAN LOT NO. DATE CODE (0416 = 16th week of Year 2004) NOTE: SOP16 HAS NO BACK MARKING. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 15 of 16 V1.0 Advanced Analog Technology, Inc. AAT1351 ORDERING INFORMATION – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 16 of 16 V1.0