AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Features General Description • Low start-up power supply voltage :1.4V(CH4) • Wide supply voltage range from 1.8V to 7V (CH1~4) • High speed operation is possible: Maximum 1 MHz • Supports for down and up/down Zeta conversion (CH1) • Supports for up, flyback and up/down SEPIC conversion (CH2,3,4) • Totem-pole type output for MOSFET • Built-in On/Off function • Built-in Short-Circuit Protection The AT1382B is a 4-channel PWM DC/DC control IC for low voltage applications with a soft start function and short circuit detection function. This IC is ideal for up conversion, down conversion, and up/down conversion (using a step-up/stepdown Zeta(CH1) and SEPIC(CH2,3,4) system with free input and output settings). Four channels can be built in the LQFP48 package, each channel be controlled, and soft-start. Applications The AT1382B include one comparator to generate low-battery warning outputs. It also contains a gain block that can be used with an external P-channel MOSFET to make a low-dropout linear regulator. • Digital Cameras • CCD Imaging Devices • Camcorders Pin Assignment Ordering Information Part number AT1382B Package LQFP48 Marking AT1382BF Aimtron reserves the right without notice to change this circuitry and specifications. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 1 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Pin Description Pin No. Pin name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 DTC4 FB4 IN4 CS4 CTL4 DTC3 FB3 IN3 CS3 CTL3 CSCP VREF GND GND VBG VCC VCC POR RT CT VB CTL ENLD CT2 CTL2 CS2 IN2 FB2 DTC2 CTL1 CS1 IN1 FB1 DTC1 LBI LBO AI AO OUT1_1 OUT1_2 OUT2_1 OUT2_2 N.C. PVCC N.C. PGND OUT3 OUT4 I/O I O I I I O I I O P P TEST P P TEST O I I TEST I I O I I I O I I O I O O O O O P P O O Function CH4 Dead Time Control CH4 Error Amplifier Output CH4 Error Amplifier Inverted Input CH4 Soft Start Setting Capacitor CH4 ON/OFF Control CH3 Dead Time Control CH3 Error Amplifier Output CH3 Error Amplifier Inverted Input CH3 Soft Start Setting Capacitor CH3 ON/OFF Control Timer Latch Short-Circuit Detection Capacitor Input Reference 0.9V Output Ground Ground Reference Test Pin Power Supply Power Supply Pre-OSC Change to Main-OSC Indicator Oscillation Frequency Setting Resistor Oscillation Frequency Setting Capacitor Reference 1.8V Output Power Supply Control Gain Block Enable Input Triangular wave OSC Inverted output Test Pin CH2 ON/OFF Control CH2 Soft Start Setting Capacitor CH2 Error Amplifier Inverted Input CH2 Error Amplifier Output CH2 Dead Time Control CH1 ON/OFF Control CH1 Soft Start Setting Capacitor CH1 Error Amplifier Inverted Input CH1 Error Amplifier Output CH1 Dead Time Control Low Battery Detected Input Low Battery Indicator LDO Regulated Input LDO Drive Output CH1 Main Side Output CH1 Synchronous Rectifier Side Output CH2 Main Side Output CH2 Synchronous Rectifier Side Output Drive Output Block Power Supply Drive Output Block Ground CH3 Output CH4 Output 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 2 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Block Diagram 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 3 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Absolute Maximum Ratings Parameter Symbol Condition Vcc -- Power supply voltage Rating Min Max Unit -- 8 V Output current Io Output pin -- 20 mA Output peak current Io Output pin, Duty≦5% -- 200 mA Power dissipation PD Ta≦25℃ (LQFP-48P) -- 860 mW Operation temperature Topr -- -30 85 ℃ Storage temperature Tstg -- -55 125 ℃ *Semiconductor devices can be permanently damaged by application of stress in excess of absolute ratings. Do not exceed these ratings. Recommended Operating Conditions Value Parameter Symbol Condition Unit Min Typ Max Startup power supply voltage Vcc CH4 1.4 -- 7 V Power supply voltage Vcc CH4 CH1 to CH3 1.5 1.8 5.0 5.0 7 7 V V Reference voltage output current IOR VREF pin -1 -- 0 mA VB pin output current IB VB pin -0.5 -- 0 mA Input voltage VIN IN1 to IN4 pins 0 -- Vcc-1.8 V Control input voltage VCTL CTL pin 0 -- 7 V OUT pin (CH1 to CH3) -- 2 15 mA OUT pin (CH4) 1 2 15 mA Output current Io Oscillator fOSC -- 100 500 1000 kHz Timing capacitor CT -- 47 100 560 pF Timing resistor RT -- 8.2 18 100 kΩ Cs CH1 to CH3 -- 0.027 1.0 μF CH4 -- 0.47 1.0 μF Soft start capacitor CCS4 Short detection capacitor CSCP -- -- 0.1 1.0 μF VB pin capacitor CVB -- 0.082 0.1 -- μF Operating ambient temperature Ta -- -30 25 85 ℃ 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 4 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Electrical Characteristics (Ta=25℃, VCC=PVCC=5V) Parameter Symbol Condition Measure result Unit Min. Typ. Max. Reference voltage block [REF] Reference voltage Output voltage temperature stability VREF △VREF Ta = -30℃ to 85℃ /VREF 0.88 0.90 0.92 V - 0.5 - % Input stability Line VCC=1.8V to 7V -10 - 10 mV Load stability Load VREF=0mA to –1mA -10 - 10 mV Shout circuit output current IOSC VREF=0.7V -20 -5 -1 mA Under voltage lockout block [U.V.L.O] Threshold voltage(CH1~CH3) VTH 1.5 1.6 1.7 V Hysteresis width(CH1~CH3) VH - 0.2 - V Reset voltage(CH1~CH3) VRST 1.6 1.7 1.8 V CH4 Pre-OSC change to MainOSC threshold VTH2 - 1.7 - V VSTB - 50 100 mV ICS -6.0 -5.0 -4.0 μA Threshold voltage VTH 0.65 0.70 0.75 V Input standby voltage VSTB - 50 100 mV Input latch voltage VI - 50 100 mV Input source current ICSCP -1.4 -1.0 -0.6 μA 450 500 550 kHz Soft start block [CS] Input standby voltage Charge current Short circuit detection block [SCP] Triangular wave oscillator block [OSC] Oscillator frequency fOSC CT=100pF, RT=20kΩ Frequency stability for voltage △f /fdv VCC=1.8V to 7V - 1 10 % Frequency stability for temperature △f /fdt Ta=-30℃ to 85℃ - 1 - % 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 5 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Parameter Symbol Condition Measure result Unit Min. Typ. Max. Error amplifier block [Error Amp](CH1~CH4) Threshold voltage VT temperature stability VTH FB=0.9V 0.69 0.70 0.71 V △VT/VT Ta = -30℃ to 85℃ - 0.5 - % -320 -80 - nA Input bias current IB IN=0V Voltage gain AV DC - 100 - dB Frequency bandwidth BW AV=0dB - 10 - MHz VOH 1.3 1.4 - V VOL - 50 200 mV - -4.0 -1.0 mA 70 140 - μA CH1 to CH4 0.65 0.7 0.75 V IN=0V -320 -80 - nA Duty = 0 % 0.25 0.3 - V - 0.75 0.80 V 0.20 0.25 - - 0.65 0.70 -1.0 -0.3 - μA - -130 -80 mA 65 100 - mA Output voltage Output source current Output sink current ISOURCE FB=0.5V ISINK FB=0.5V Short detect comparator [SCP Comp] Threshold voltage VTH Input bias current IB PWM Comp. [PWM Comp] Threshold voltage(CH4) Threshold voltage(CH1~3) Input current VT0 VTmax VT0 Duty = 100 % Duty = 0 % VTmax Duty = 100 % IDTC DTC=0.4V Output block (CH1,2) [Pin 40,42] Output source current Output sink current Output ON resistor ISOURCE Duty≧95%, OUT=0V ISINK Duty≦5%, OUT=5V ROH OUT = -15mA - 18 30 Ω ROL OUT = 15mA - 16 25 Ω ISOURCE Duty≧95%, OUT=0V - -130 -80 mA 65 100 - mA Output block (CH1 to CH3) [Pin 39,41,47] Output source current Output sink current Output ON resistor ISINK Duty≦5%, OUT=5V ROH OUT = -15mA - 18 30 Ω ROL OUT = 15mA - 16 25 Ω 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 6 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Parameter Symbol Condition Measure result Unit Min. Typ Max. Output block (CH4) [Pin 48] Output source current ISOURCE Duty≧95%, OUT=0V Output sink current Output ON resistor - -260 -160 mA 150 260 - mA ISINK Duty≦5%, OUT=5V ROH OUT = -15mA - 9 15 Ω ROL OUT = 15mA - 9 15 Ω VIH Active mode 1.3 - 7 V VIL Standby mode 0 - 0.8 V VIH Active mode 1.3 - 7 V VIL Standby mode 0 - 0.8 V ICTL CTL = 5V - 5 20 μA 1.20 1.22 1.24 V -0.1 - 1.3 V - - 100 nA 70 100 140 V/V Control block [CTL] CTL input voltage CTL1 to CTL4 input voltage Input current Analog gain block [AO,AI] AI feedback regulation voltage VAO=VOUT-1.22V AI input common-mode range AI input current VAI=1.32V AI to AO voltage gain AO output sink current VAI=1V, VAO=2V 0.5 2.5 - mA AO output source current VAI=1.5V, VAO=2V 0.5 2.5 - mA 1.2 - 7 V 0 - 0.8 V LBI detect threshold 1.20 1.22 1.24 V Detect Hysteresis -50 +50 mV ENLD enable VIH Active mode ENLD disable VIL Standby mode Low battery detect block [LBI, LBO] LBO output voltage low Isink=1mA - - 0.4 V LBO output high leakage VLBO=5V - 0.01 1 μA - - 10 μA - - 10 μA - 3 6 mA General Icss Standby current Power supply current CTL=0V CTL=0V Icss(o) CTL1=CTL2=CTL3= CTL4="H" CTL=CTL1=CTL2=C Icc TL3=CTL4=ENLD=" H" 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 7 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Typical Application For 4 pcs AA Battery 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 8 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 9 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Typical Characteristics 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 10 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 11 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Package Outline LQFP48 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 12 AT1382B Preliminary Product Information 4-Channel DC-DC Converter for DSC Reflow Condition (IR/Convection or VPR Reflow) Reference JEDEC Standard J-STD-020A Classification Reflow Profiles Convection or IR/Convction Average Heating Rate(180°C to peak) 5°C/second max. 120 seconds max. Preheat Temperature(125±20°C) 10~150 seconds Temperature maintained above 180°C 10~20 seconds Time within 5°C of actual Peak Temperature Peak Temperature Range(Note 1) 219~225°C or 235~240°C Cooling Rate 6°C /second max. 6 minutes max. Time 25°C to Peak Temperature VPR 10°C/second max. 60 seconds 219~225°C or 235~240°C 10°C/second max. *1 The maximum peak temperatures for IR and VP reflow are depending on package dimensions. Package Reflow Conditions Pkg. Thickness ≥2.5mm Pkg. Thickness <2.5mm Pkg. Thickness <2.5mm and and and all bags 3 Pkg. Volume ≥350 mm Pkg. Volume <350 mm3 Convection 219~225°C VPR 219~225°C IR/Convection 219~225°C Convection 235~240°C VPR 235~240°C IR/Convection 235~240°C 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 13