Advanced Analog Technology, Inc. AAT1104/AAT1104A 2-CHANNEL SWITCHING REGULATOR CONTROLLER Features General Description z Complete PWM Power Control Circuitry z Precision Reference：2.505V±1% (25 oC) z Under-voltage Lockout 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 AAT1104/AAT1104A 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. Both channel of AAT1104/AAT1104A can be used for DC/DC converter operations including step-up, step-down, and inverting. 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 AAT1104/AAT1104A offers a simple and cost effective solution. 10kHz to 800kHz z VDD range：4.0V to 6.5V Pin Configuration TOP VIEW CT 1 16 Vref RT 2 15 SCP NON1 3 14 NON2 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 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Pin Description Pin # Name I/O Description 1 CT I External timing capacitance 2 RT I External timing resistance 3 NON1 I Positive input for error amplifier 1 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 NON2 I Positive input for error amplifier 2 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 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC) Output voltage SYMBOL VDD VI VO VALUE 7 VDD VDD +0.3 UNIT V V V Output current IO 120 mA Operating free-air temperature range Tope -20 to 85 o Storage temperature range Tstg -65 to 150 o Power dissipation Pd 500 C C mW Recommended Operating Conditions Supply voltage, VDD Input voltage, IN1, IN2 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 Max 6.5 1.6 VDD Unit V V V CT RT f OSC 100 5.1 15000 50 pF kΩ 10 800 kHz 100 mA IO Tope -20 85 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. o C V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) Oscillator Parameter Test Condition Min Typ Frequency 400 f OSC C T = 220pF, R T = 10kΩ 320 Frequency change with VDD f dV Max Unit 480 KHz 1 VDD = 4.0V to 6.0V, TA = 25 oC C T = 220pF, R T = 10kΩ % 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 o 0.37 TA = 25 C V Short Circuit Protection Control Parameter Test Condition Input threshold voltage Vr1 Short-circuit detect threshold voltage SCP terminal source current Standy Voltage Latch Voltage Vr 2 I SCP Min Typ Max Ch-1, 2 0.95 1.05 1.15 AAT1104A only 1.02 1.48 1.18 1.64 1.34 1.8 AAT1104A only 0.6 -1.5 0.7 -2.5 0.8 -3.5 AAT1104A only -10 -15 50 30 -20 100 100 V V µA VSTB VLT Note1: Typical values of all parameters are specified at Unit mV mV TA =25 oC. – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) (continued) Reference Voltage Parameter Test Conditions Reference voltage Input voltage regulation VREF VRI Output regulation VRO Min Typ Max Unit I REF = −1mA , TA = 25 C I REF = −1mA , VDD = 4.0V to 6.0V I REF = −0.1mA to -3mA 2.48 2.505 1 2.53 5 V mV 1 10 mV Test Condition Min o EA (Error Amplifier) Parameter 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 + Typ 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 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A 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 Vd 0 Duty = 0%, f OSC = 10kHz 1.87 1.97 2.07 Vd100 AAT1104A only Duty = 100%, f OSC = 10kHz 1.85 1.38 2.05 1.48 2.25 1.58 VDT 1.2 2.28 1.45 2.48 1.7 Latch input voltage AAT1104A only IDT = 40µA Latch mode source current IDT DTC1,2=0V -200 -560 Input threshold voltage (DTC) V V µA Output Stage Parameter Saturation voltage Leakage current Test Condition VSAT Ipeak Min Typ 0.8 Max Unit 1.2 V 5 µA Min Max Unit mA mA IO = 75mA（CH-1,2） Vo =6.0V Operating Current Parameter Supply current Test Condition I DD−OFF Output ”OFF “state Typ 1.3 I DD−ON RRT =10kΩ 1.6 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Function Block Diagram FB1 NON1 INV1 OUT1 Scpcomp Err-Amp PWM GND UVC NON2 OUT2 INV2 FB2 Err-Amp PWM Vref CT UVC DTC1 OSC RT Vref UVC UVC DTC2 LATCH UVLO Vref VREF V DD LATCH V DD SCP SCP Vref UVC – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Application Circuit VREF VDD option circuit: charge pump circuit R12 R13 R11 VP3 VDD Q1 OUT1 NON1 VN1 D4 VN1 R5 D1 FB1 L1 C1 R1 C8 Inverting output C9 C7 D3 INV1 R2 VREF VP2 R3 AAT1104 AAT1104A R4 VDD VDD VDD L2 R16 VP2 OUT2 Q3 D2 R17 Q2 NON2 VREF C10 Q4 R6 Step_up output R18 FB2 C2 R14 INV2 R15 VREF C4 CT R7 R9 C5 DTC1 RT DTC2 R8 GND CT R10 SCP RT C3 – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Timing Chart AAT1104 1.97V FB DTC CT 1.05V 1.48V PWMOUTPUT OUTPUT 1.64V SCP tDT SCPCOMP 2.53V Lockout free VDD – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Timing Chart AAT1104A 2.05V FB DTC CT 1.18V 1.45V PWMOUTPUT OUTPUT 0.7V SCP tDT SCPCOMP 2.53V Lockout free VDD – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. V 1.0 Advanced Analog Technology, Inc. AAT1104/AAT1104A Package Dimension (Unit: Mil) 1 E A1 A A2 E D e b 12° y A 1 A 2 b C D E E1 e L y Θ 0 .0 5 0 .5 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 0 .1 5 1 .0 5 0 .2 8 0 .0 0 2 0 .0 0 8 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 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° – 台灣類比科技股份有限公司 – Advanced Analog Technology, Inc. 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 1.0