Advanced Analog Technology, Inc. AAT1106 Preliminary and Provisional 2-CHANNEL STEP-UP PWM CONTROLLERS Features General Description z Complete PWM Power Control Circuitry z Under-voltage Lockout Protection z Totem pole Output z Output Short Circuit Protection z Dead Time Control：0 to 100% z Wide Operating Frequency： The AAT1106 series provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system, this device offers the systems engineer the flexibility to tailor the power supply circuitry to a specific application. Each channel contains its own error amplifier, PWM comparator, dead–time control and output driver. The under-voltage protection, oscillator, short circuit protection and voltage reference circuit are common for the two channels. The AAT1106 contains two boost (step-up) exclusive circuit. Dead-time control (DTC) can be set to provide 0% to 100% dead time by resistive divider network. Soft start can be implemented by paralleling the DTC resistor with a capacitor. Two dead time control inputs are assigned for Ch-1 and Ch-2 individually, and dead time control inputs can be used to control on / off operation. With a minimum number of external components, the AAT1106 series offers a simple and cost effective solution. 10kHz to 800kHz z Shut Down Control z Power Good Protection Pin Configuration TOP VIEW CT 1 16 Vref RT 2 15 SCP SHDN 3 14 PRDB INV1 4 13 INV2 FB1 5 12 FB2 DTC1 6 11 DTC2 OUT1 7 10 OUT2 GND 8 9 VDD (TSSOP-16 PACKAGE) *Spec is subject to change without notice in this document. – – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Pin Description Pin # Name – I/O Description 1 CT I External timing capacitance 2 RT I External timing resistance 3 SHDN I Shut down input pin（internal pull "H"） 4 INV1 I Negative input for error amplifier 1 5 FB1 I Output for error amplifier 1 6 DTC1 I Output 1 dead time / soft start setting 7 OUT1 O Output 1 8 GND 9 VDD 10 OUT2 O Output 2 11 DTC2 I Output 2 dead time / soft start setting 12 FB2 I Output for error amplifier 2 13 INV2 I Negative input for error amplifier 2 14 PRDB I Power good output pin 15 SCP I Timer latch setting 16 Vref O Reference voltage (2.505V) output Ground I Power supply – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC, SHDN) Output voltage SYMBOL VDD VI VO VALUE 7 VDD VDD +0.3 UNIT V V V Output current IO -120/+120 mA Operating free-air temperature range Tope -20 to 85 o o Storage temperature range Tstg -65 to 150 Power dissipation Pd 500 C C mW Recommended Operating Conditions Supply voltage, VDD Input voltage, INV1, INV2 Output voltage OSC capacitor OSC resistor (Note 1) Oscillator frequency Output current, Iout1, Iout2 Operating free-air temperature – Symbol VDD Vcm VO Min 4.0 0.5 0 CT RT f OSC 100 5.1 10 IO Tope -20 Max 6.5 1.6 VDD 15000 50 800 Unit V V V +50/-50 mA 85 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – pF kΩ kHz o C V 0.1 Advanced Analog Technology, Inc. AAT1106 Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) Oscillator Parameter Test Condition Frequency f OSC C T = 220pF, R T = 10kΩ Frequency change with VDD f dV VDD = 4.0V to 6.0V, TA = 25 oC C T = 220pF, R T = 10kΩ Min 320 Typ 400 Max Unit 480 KHz 1 % Under-voltage Protection Parameter Test Condition o Min Typ Max Unit Upper threshold voltage VUPH TA = 25 C 2.6 2.9 3.2 V Lower threshold voltage VUPL TA = 25 oC 2.23 2.53 2.83 V Hysteresis ( VUPH – VUPL ) VHYS TA = 25 oC 0.37 V Short Circuit Protection Control Parameter Test Condition Ch-1, 2 Min Typ Max 2.1 2.4 2.65 Unit Input threshold voltage Vr1 Short-circuit detect threshold voltage SCP terminal source current Vr 2 1.48 1.64 1.8 V V I SCP VSTB VLT -1.5 -2.5 -3.5 µA 50 30 100 100 mV mV Typ Max Unit Standy Voltage Latch Voltage Shun Down Control（Internal pull "H"） Parameter Test Condition Shut down enable voltage VsdL TA = 25 C Shut down release voltage VsdH TA = 25 oC Note1 : Typical values of all parameters are specified at – Min o 0.5 2.0 V V TA =25 oC. – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) (continued) Reference Voltage Parameter Test Conditions Min o Typ Max Internal reference Voltage Vrefi I REF = −1mA , TA = 25 C 1.220 Reference voltage VREF I REF = −1mA , TA = 25 oC 2.430 2.505 2.580 Input voltage regulation VRI 1 Output regulation VRO I REF = −1mA , VDD = 4.0V to 6.0V I REF = −0.1mA to -1mA 1.233 1.246 5 1 Unit V mV mV EA (Error Amplifier) Parameter Test Condition Input offset voltage VIO Ch-1,2, AV=1 Input bias current Input voltage range Open-loop voltage amplification Output voltage swing I IB VIR A VD Ch-1,2 Ch-1,2 VOM + Min Max Unit 6 mV ±15 ±100 1.6 0.5 70 85 nA V dB 2.3 2.5 V 0.7 VOM − 0.9 Output sink current I OM + FB=1.25V 3 20 mA Output source current I OM − FB=1.25V -45 -75 µA 60 80 dB Common-mode rejection ratio CMRR – Typ – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) (continued) Dead Time Control & PWM Parameter Test Condition Min Typ Max Unit 0.1 1 µA Input bias current I BDT VDTC = 2V Input threshold voltage (DTC) Vd 0 Duty = 0%, f OSC = 10kHz Vd100 Duty = 100%, Latch input voltage VDT f OSC = 10kHz IDT = 100µA Latch mode source current IDT DTC1,2=2.0V 1.38 1.48 1.58 1.87 1.97 2.07 0.1 0.3 200 500 V V µA Output Stage Parameter Test Condition High-level output voltage Low-level output voltage Rise time Fail time Leakage current VOH VOL Trise Tfail Ipeak IO=-50mA IO=+50mA CL=1000pF CL=1000pF Vo =6.0V Min 3.6 Typ 4.0 0.8 100 100 Max Unit V 1.2 V nS nS 5 µA Min Max Unit mA mA Operating Current Parameter Supply current – Test Condition I DD−OFF Output ”OFF” state Typ 1.8 I DD−ON PRT =10 k 2.0 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Function Block Diagram FB1 VDD INV1 Scpcomp Err-Amp 1.233V Vrefi OUT1 PWM GND Vr1 VDD UVC Vrefi 1.233V OUT2 INV2 FB2 Err-Amp PWM DTC1 CT UVC DTC2 OSC RT UVC UVC LATCH VDD LATCH SCP UVLO VDD PRDB SCP UVC SHDN sdc Vref VREF Vref SHUT_DOWN CONTROL – – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Application Circuit 1 VDDP VDD C11 L1 VP1 U1 VDD VP1 C1 D1 PRDB OUT1 R5 Q1 C9 FB1 R1 INV1 R2 VP2 VDDP L2 C2 R6 D2 FB2 VP2 AAT1106 R3 Q2 INV2 R4 C10 OUT2 SHDN SHDN VREF R7 CT R9 C20 DTC1 RT DTC2 GND SCP C4 CT RT R8 R10 C5 C3 – – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Application Circuit 2 option circuit 3: for power good protection Q3 R20 VP1 C7 D1 PRDB OUT1 R5 D4 D3 L1 PRDB VDD C8 C11 U1 C1 VN3 VDDP VDD VP1 option circuit 1: charge pump circuit Q1 C9 FB1 R1 INV1 R2 VP2 VDDP L2 R6 C2 D2 FB2 R3 VP2 AAT1106 Q2 INV2 R4 OUT2 C10 PRDB SHDN R12 SHDN R11 VREF R7 CT R9 C20 Q4 DTC1 option circuit 2: for Vp3 discharge RT DTC2 GND SCP C4 CT RT R8 R10 C5 C3 – – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Boost （Step-up）Timing Chart 2.4V 1.97V DTC CT FB 1.48V PWMOUTPUT OUTPUT 1.64V SCP tDT SCPCOMP 2.53V VDD Lockout free PRDB – – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – V 0.1 Advanced Analog Technology, Inc. AAT1106 Package Dimension (Unit: Mil) D E 1 E A 2 A 1 A 12° e b y D IM E N S IO N S A A 1 A 2 b C D E E 1 e L y Θ – M IN 1 .0 5 0 .0 5 IN M IL L IM E T E R S 0 .5 N O M 1 .1 0 0 .1 0 1 .0 0 0 .2 5 0 .1 2 7 5 .0 7 5 6 .4 0 4 .4 0 0 .6 5 0 .6 0 0° 4° 0 .2 0 4 .9 0 6 .2 0 4 .3 0 M 1 0 1 0 A .2 .1 .0 .2 X 0 5 5 8 D IM E N S IO N S M IN 0 .0 4 1 0 .0 0 2 IN 5 .1 0 6 .6 0 4 .5 0 0 .1 9 3 0 .2 4 4 0 .1 7 0 0 .7 0 0 .0 7 6 8° 0 .0 2 N O M 0 .0 4 3 0 .0 0 4 0 .0 3 9 0 .0 1 0 0 .0 0 5 0 .1 9 9 8 0 .2 5 2 0 .1 7 3 0 .0 2 6 0 .0 2 4 0° 4° 0 .0 0 8 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. – IN C H E S M A X 0 .0 4 7 0 .0 0 6 0 .0 4 1 0 .0 1 1 0 .2 0 0 0 .2 6 0 0 .1 7 7 0 .0 2 8 0 .0 0 3 8° V 0.1