AAT1100 ANALOGICTECH | Alldatasheet
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Technical content
Features
z Complete PWM Power Control Circuitry z Precision Reference：1.25V±1% (25 oC) z Low Operating Voltage：2.5V to 7.0V z Under-Voltage Lockout Protection z Totem Pole Output z Output Short Circuit Protection z Low Dissipation Current： 2.5mA at 500 kHz and 50% Duty Cycle z Separate On / Off Control for CH1, CH3 Pair and CH2 (Refer to Function Table) z Dead Time Control：0 to 100% z Wide Operating Frequency：50 kHz to 1MHz z Minimized External Components Pin Configuration IE2 OE 2 OUT2 OUT3 OUT1 SCP GND OE3 IE1 IE3 OE 1 OSC DTC2 DTC13 TOP VIEW (TSSOP-16 PACKAGE) DD V REF V General Description The AAT1100 provides an integrated triple-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system; this device offers system engineer the flexibility to custom-make the power supply circuitry to a specific application. 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 common features of the three channels. The AAT1100 contains two boost circuits (CH1, CH3) and a buck-boost circuit (CH2). DTC can be set to provide 0% to 100% dead-time through a divider network. Soft-Start can be implemented by paralleling the DTC resistor with a capacitor. Two DTC inputs are assigned for CH1, CH3 pair and CH2 individually, and DTC inputs can be used to control on / off operation. In addition, this device can operate from 2.5V to 7.0V supply voltages to achieve efficient operation in low power system. With a minimal number of external components, the AAT1100 offers a simple and cost effective solution.
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 2 of 15 V 1.0 AAT1100 Function Table Output Condition CH1 CH2 CH3 DTC13 > 0.3V, DTC2 > 0.3V ON ”High” ON ”Low” ON ”High” DTC13 > 0.3V, DTC2 < 0.2V ON ”High” OFF ”High” ON ”High” DTC13 < 0.2V, DTC2 > 0.3V OFF ”Low” ON ”Low” OFF ”Low” DTC13 < 0.2V, DTC2 < 0.2V OFF ”Low” OFF ”High” OFF ”Low” Pin Description Pin No Name I/O
Description
I Inverting Input Terminal of Error Amplifier 2 (EA2) OE2 I/O Output of Error Amplifier 2 (EA2) DD V I Supply Voltage OUT2 O Channel 2 Output OUT3 O Channel 3 Output OUT1 O Channel 1 Output GND Ground SCP I Short Circuit Protection REF V O Reference Voltage Output DTC13 I Dead-Time Control of Channel 1, 3 (CH1, CH3) DTC2 I Dead-Time Control of Channel 2 (CH2) OSC I Frequency Setting Capacitor & Resistor Input OE1 I/O Output of Error Amplifier 1 (EA1) IE1 I Inverting Input Terminal of Error Amplifier 1 (EA1) IE3 I Inverting Input Terminal of Error Amplifier 3 (EA3) OE3 I/O Output of Error Amplifier 3 (EA3)
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 3 of 15 V 1.0 AAT1100 Absolute Maximum Ratings Characteristics Symbol Value Unit Supply Voltage DD V V Input Voltage (IE1, IE2, IE3, DTC13, DTC2) I V DD V V Output Voltage O V DD V +0.3 V CH1, CH3 41 + mA Output Current CH2 O I 21 + mA Sink ( w t s 2µ , Duty≦10%) +200 Output Peak Current Source ( w t s 2µ , Duty≦10%) opeak I 200 mA Operating Temperature Range C T to oC Storage Temperature Range storage T 125 to oC Recommended Operating Conditions Symbol Min Max Unit Supply Voltage, DD V DD V 2.5 7.0 V Input Voltage, IE1, IE3 I V 0.95 1.55 V Input Voltage, IE2 I V 0.4 1.0 V Output Voltage O V DD V V Oscillator (OSC) Capacitance OSC C 1,800 pF Oscillator (OSC) Resistance (Note 1) OSC R kΩ Oscillator (OSC) Frequency OSC f 1,000 kHz Output Current (CH1, CH3) O I 40 + mA Output Current, (CHl, CH2) O I 20 + mA Output Current of Error Amplifier 1, 2 and 3 (EA1, EA1, EA3) OE I µA Operating Temperature C T oC Note 1: The rise and fall times of oscillator wave form will be equal at OSC resistor ( OSC R ) =7 kΩtheoretically.
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 4 of 15 V 1.0 AAT1100 Electrical Characteristics, 3.3V VDD = C T = 25 oC (Unless Otherwise Specified) Oscillator Parameter Test Condition Min Typ Max Unit Oscillator Frequency OSC f OSC C = 130pF, OSC R = 7 Ω k 400 500 600 kHz Oscillator Output Voltage at High OSCH V OSC C = 130pF, OSC R = 7 Ω k 0.95 1.00 1.05 V Oscillator Output Voltage at Low OSCL V OSC C = 130pF, OSC R = 7 Ω k 0.35 0.40 0.45 V Frequency Change with DD V V DD V = 2.5V to 7V, OSC C = 130pF, OSC R = 7 Ω k Frequency Change with Temperature T (Note 2) Oscillator Output Current OSC I 180 200 220 A µ Under-Voltage Protection Parameter Test Condition Min Typ Max Unit Upper Threshold Voltage UPH V 2.2 2.3 2.4 V Lower Threshold Voltage UPL V 2.0 2.1 2.2 V Hysteresis ( UPH V UPL V HYS V 0.1 0.2 0.3 V Short Circuit Protection Control Parameter Test Condition Min Typ Max Unit r V CH1, CH3 1.10 1.15 1.20 Input Threshold Voltage r V CH2 0.20 0.25 0.30 V Latch Reset Threshold Voltage R V 0.8 1.5 1.8 V Short Circuit Detect Threshold Voltage r V 1.20 1.25 1.30 V SCP Terminal Source Current SCP I A µ Note 2: The deviation is defined as the difference between the maximum and minimum values obtained over the recommended temperature range (-20 oC to 85 oC).
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 5 of 15 V 1.0 AAT1100 Electrical Characteristics, DD V = 3.3V; C T = 25 oC (Unless Otherwise Specified) (Cont.) Reference Voltage Parameter Test Conditions Min Typ Max Unit Reference Voltage REF V mA IREF 1.237 1.250 1.263 V Short Circuit Output Current OS I REF V mA Input Voltage Regulation RI V mA IREF DD V = 2.5V to 7V mV Output Regulation RO V mA 1.0 IREF to mA mV Reference Voltage Change with Temperature R V mA IREF (Note 3) mV EA (Error Amplifier) Parameter Test Condition Min Typ Max Unit Input Offset Voltage IO V CH1,CH3, Unity Gain mV CH1,CH3, I V = 0.95V to 1.55V ±10 ±20 Input Bias Current IB I CH2, I V = 0.4V to 1.0V ±10 ±20 nA CH1, CH3 0.95 1.55 Input Voltage Range IR V CH2 0.4 1.0 V Open-Loop Voltage Gain VO A OE R = 200 Ω k dB Unity-Gain Bandwidth BW MHz OS V V VI A IO µ 1.2 Output Voltage Swing OS V V VI mA 2.0 IO = 0.2 V Output Sink Current OS I V VI V 2.0 VO = 0.2 1.0 mA Output Source Current OS I V VI V 2.1 VO = 100 A µ CH2, Unity Gain, C T = 25 oC 678 700 722 Input Bias Voltage r V CH2, Unity Gain 665 700 735 mV Note 3: The parameter R V is defined as the difference between the maximum and minimum values obtained over the recommended temperature range (-20 oC to 85 oC).
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 6 of 15 V 1.0 AAT1100 Electrical Characteristics, DD V = 3.3V; C T = 25 oC (Unless Otherwise Specified) (Cont.) Dead-Time Control Parameter Test Condition Min Typ Max Unit BDT I DTC V = 0.35V to 1.05V 200 nA Input Bias Current BDT I DTC V = 0.35V to 1.05V ±20 nA d V Duty = 0%, OSC f = 500kHz 0.3 0.4 0.5 Input Threshold Voltage (DTC 13) 100 d V Duty = 100%, OSC f = 500kHz 0.9 1.0 1.1 V d V Duty = 0%, OSC f = 500kHz 0.3 0.4 0.5 Input Threshold Voltage (DTC2) 100 d V Duty = 100%, OSC f = 500kHz 0.9 1.0 1.1 V Channel On / Off Threshold Voltage r V 0.2 0.25 0.3 V Output Stage Parameter Test Condition Min Typ Max Unit mA IO (CH2) 2.90 3.05 High-Level Output Voltage OH V mA IO (CH1, CH3) 1.9 2.2 V mA IO = (CH1, CH3) 0.2 0.4 Low-Level Output Voltage OL V mA IO = (CH2) 0.3 0.6 V Rise Time RISE t pF 000 CL 130 ns Fall Time FALL t pF 000 CL ns Operating Current Parameter Test Condition Min Typ Max Unit OFF DD I Output ”OFF” State 2.5 4.0 mA Supply Current ON DD I OSC f = 500 kHz, Duty = 50%, No Load 3.5 5.0 mA
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 7 of 15 V 1.0 AAT1100 Block Diagram O E 1 IE 1 E A 1 E A 2 O E 2 IE 2 E A 3 O E 3 IE 3 U V C D T C 1 3 P W M C 1 P W M C 2 P W M C 3 O S C U V C R R E N 1 3 U V C N O E 1 O E 3 O E 2 E N 2 L a tc h E N 1 3 O U T 1 E N 2 L a tc h O U T 2 O S C E N 1 3 L a tc h O U T 3 U V C U V L O U V C N G N D S C P L a tc h D T C 2 U V C N S C P 2 µ A D T C 2 N R E F V V 2 5 V r V V r V 2 5 V r V 2 5 V R E F = V V r V 2 5 V re f = V 1 5 V 1 r = V 2 5 V r V 2 5 V r D D V D D V R E F V R E F V Note: All voltage and current values in block diagram are nominal.
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 8 of 15 V 1.0 AAT1100 Application Circuit A A T 1100 V p1 O U T 1 O U T 2 O U T 3 D T C 13 D T C 2 O E 1 IE 1 O E 3 IE 3 O E 2 IE 2 O SC SC P G N D C D L Q V p3 C D L Q V n2 C D L Q C R R C R C R R V p1 C R C R R V p3 C R C R R V N 2 C O SC R O SC R EF V R E F V D D V D D V D D V D D V D D V S C P C V R E F C
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 9 of 15 V 1.0 AAT1100 Timing Chart O E1 or O E3 O SC DTC13 OUT1 or OUT3 R egulation O utput 1.0V 0.4V O E1 or O E3 OSC + (N ote 4) DTC 13 1.25V 1.25V V O L 100% off Tim ing Chart for CH 1 or CH 3 (Short Circuit Protect Tim e)=0.625*Cscp.*106 (sec) V V 1 r = DD V DD V D TC V O H V reg O V scp t scp t DD V U PH V REF V r V SCP N ote 4 : + Oscillator w ave form is illustrated as a triangle w ave form . How ever it is actually determ ined by tim e constant of tim ing resistor and capacitor connected to OSC term inal.
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 10 of 15 V 1.0 AAT1100 Timing Chart V U PH O E 2 O SC D T C 2N O U T 2 R eg ula tion O utput 1 .0V 0 .4 V 1.25 V 1 .25 V 10 0% off T im in g C h art for C H 2 (S hort C ircuit P rotect T im e)=0.625*C scp.*10 6 (sec) D T C 2 N O E 2 O SC + (N ote 4) D T C 2 D T C 2 D T C 2N D D V R E F V r V scp t scp t reg o V O L V O H V V 2 5 V 2 r = D D V SC P
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 11 of 15 V 1.0 AAT1100 Package Dimension 16-PIN TSSOP
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 12 of 15 V 1.0 AAT1100 Package Dimension (Cont.) DIMENSIONS IN MILLIMETERS DEMINSIONS IN INCHES SYMBOLS MIN TYP MAX MIN TYP MAX A 1.05 1.10 1.20 0.041 0.043 0.047 0.05 0.10 0.15 0.002 0.004 0.006 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 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 o o o o 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.
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 13 of 15 V 1.0 AAT1100 Tape and Reel
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 14 of 15 V 1.0 AAT1100 Tape and Reel (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. A AND B MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. K 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 MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. Part Marking TSSOP16 Top Marking AAT1100 XXXXXX TSSOP16 Back Marking YYWW
Advanced Analog Technology, Inc. – 台灣類比科技股份有限公司 – – Advanced Analog Technology, Inc. – Page 15 of 15 V 1.0 AAT1100