AT1388 Preliminary Product Information 6-Channel DC-DC Converter for DSC Features General Description * Low start-up power supply voltage :1.4V(CH6) * Wide supply voltage range from 2.5V to 7V (CH1~6) * High speed operation is possible: Maximum 1 MHz * Supports for up, flyback and up/down SEPIC conversion (CH2,3,4,5,6) * Supports for down and up/down Zeta conversion (CH1) * Synchronized rectification on CH1,CH2 * Totem-pole type output for MOSFET * Built-in On/Off function * Built-in Short-Circuit Protection. The AT1388 is a 6-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 SEPIC ,Zeta system with free input and output settings). 6 channels can be built in the LQFP48 package, each channel be controlled, and soft-start. The AT1388 include one comparator to generate low-battery warning outputs. It also contains two high efficiency topology by using synchronous rectification PWM(It can be disable by floating OUT1_2,OUT2_2.) Applications * Digital Cameras * CCD Imaging Devices * Camcorders Pin Assignment Ordering Information Part number AT1388 Package LQFP48 Marking AT1388F 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: service@aimtron.com.tw 1 AT1388 Preliminary Product Information 6-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 SS6 FB6 IN6 DTC5 SS5 FB5 IN5N IN5P DTC4 SS4 FB4 IN4 DTC3 SS3 FB3 IN3 CTL6 CTL5 VREG AGND VCC CTL4 CT CTL CSCP CTL3 CTL2 CTL1 IN2 FB2 SS2 DTC2 IN1 FB1 SS1 DTC1 LBI LBO OUT1_1 OUT1_2 OUT2_1 OUT2_2 PVCC PGND OUT3 OUT4 OUT5 OUT6 I/O I I I I I I I I I I I I I I I I I I O P P I I I I I I I I I I I I I I O O O O O P P O O O O Function CH6 Soft Start Setting Capacitor CH6 Error Amplifier Output CH6 Error Amplifier Inverted Input CH5 Dead Time Control CH5 Soft Start Setting Capacitor CH5 Error Amplifier Output CH5 Error Amplifier Negative Input CH5 Error Amplifier Positive Input CH4 Dead Time Control CH4 Soft Start Setting Capacitor CH4 Error Amplifier Output CH4 Error Amplifier Inverted Input CH3 Dead Time Control CH3 Soft Start Setting Capacitor CH3 Error Amplifier Output CH3 Error Amplifier Inverted Input CH6 ON/OFF Control Input CH5 ON/OFF Control Input 2.3V Regulator Output Power Ground Power Supply CH4 ON/OFF Control Input Oscillation Frequency Setting Capacitor Power Control Input Timer Latch Short-Circuit Detection Capacitor Input CH3 ON/OFF Control Input CH2 ON/OFF Control Input CH1 ON/OFF Control Input CH2 Error Amplifier Inverted Input CH2 Error Amplifier Output CH2 Soft Start Setting Capacitor CH2 Dead Time Control CH1 Error Amplifier Inverted Input CH1 Error Amplifier Output CH1 Soft Start Setting Capacitor CH1 Dead Time Control Low Battery Detector Input Low Battery Indicator 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 CH5 Output CH6 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: service@aimtron.com.tw 2 AT1388 Preliminary Product Information 6-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: service@aimtron.com.tw 3 AT1388 Preliminary Product Information 6-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, Duty5% -- 200 mA Power dissipation PD Ta25 (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 Unit Condition Min Typ Max Startup power supply voltage Vcc CH6 1.4 -- 7 V Power supply voltage Vcc CH1 to CH6 2.5 5.0 7 V Regulator voltage output current IOR VREG pin -10 -- 0 mA Input voltage VIN IN1 to IN6 pins 0 -- Vcc-1.8 V Control input voltage VCTL CTL pin 0 -- 7 V OUT pin (CH1 to CH5) -- 2 15 mA OUT pin (CH6) 1 2 15 mA Output current Io Oscillator fOSC -- 100 500 1000 kHz Timing capacitor CT -- 47 82 560 pF Cs CH1 to CH5 -- 0.1 1.0 F CSS6 CH6 -- 0.1 1.0 F Soft start capacitor Short detection capacitor CCSCP -- -- 0.1 1.0 F VREG pin capacitor CVREG -- 0.082 0.1 -- F TA -- -30 25 85 Operating ambient temperature 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: service@aimtron.com.tw 4 AT1388 Preliminary Product Information 6-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] Regulator voltage Output voltage temperature stability VREG VREF TA = -30 to 85 /VREF 2.2 2.3 2.4 V - 0.5 - % Input stability Line VCC=2.5V to 7V -10 - 10 mV Load stability Load VREG=0mA to -10mA -10 - 10 mV Short circuit output current IOSC VREG=2.0V - - -100 mA Under voltage lockout block [U.V.L.O] Threshold voltage(CH1~CH5) VTH 2.0 2.2 2.4 V CH6 Pre-OSC change to MainOSC threshold VTH2 - 2.5 - V VH - 0.2 - V VSTB - 50 100 mV ICS -1.5 -1.0 -0.8 A 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 A 450 500 550 kHz Hysteresis width(CH1~CH5) Soft start block [CS] Input standby voltage Charge current Short circuit detection block [SCP] Triangular wave oscillator block [OSC] Oscillator frequency fOSC CT=82pF Frequency stability for voltage f /fdv VCC=2.5V to 7V - 1 10 % Frequency stability for temperature f /fdt TA=-30 to 85 - 1 - % FB=0.7V 0.68 0.70 0.72 V VT/VT TA = -30 to 85 - 0.5 - % -320 -80 - nA Error amplifier block [Error Amp](CH1~CH5) Threshold voltage VT temperature stability Input bias current VTH IB IN=0V 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: service@aimtron.com.tw 5 AT1388 Preliminary Product Information 6-Channel DC-DC Converter for DSC Voltage gain AV DC - 100 - dB Frequency bandwidth BW AV=0dB - 10 - MHz VOH 1.0 1.2 - V VOL - 50 200 mV - -4.0 -1.0 mA 70 140 - A CH1 to CH4 0.65 0.7 0.75 V IN=0V -320 -80 - nA Duty = 0 % 0.25 0.3 - V - 0.80 0.85 V -1.0 -0.3 - A - -130 -80 mA 65 100 - mA Output voltage Output source current ISOURCE FB=0.5V Output sink current ISINK FB=0.5V Short detect comparator [SCP Comp] Threshold voltage VTH Input bias current IB PWM Comp. [PWM Comp] VT0 Threshold voltage(CH1~6) Input current VTmax Duty = 100 % IDTC DTC=0.5V Output block (CH1 to CH5) [Pin 39,41,45,46,47] Output source current ISOURCE Duty95%, OUT=0V ISINK Duty5%, OUT=5V ROH OUT = -15mA - 18 30 ROL OUT = 15mA - 16 25 ISOURCE Duty95%, OUT=0V - -130 -80 mA 65 100 - mA Output sink current Output ON resistor Output block (CH1,2 ) [Pin 40,42] Output source current Output sink current Output ON resistor ISINK Duty5%, OUT=5V ROH OUT = -15mA - 18 30 ROL OUT = 15mA - 16 25 ISOURCE Duty95%, OUT=0V - -260 -160 mA 150 260 - mA Output block (CH6) [Pin 48] Output source current Output sink current Output ON resistor ISINK Duty5%, OUT=5V ROH OUT = -15mA - 9 15 ROL OUT = 15mA - 9 15 VIH Active mode 1.3 - 7 V VIL Standby mode 0 - 0.7 V VIH Active mode 1.3 - 7 V VIL Standby mode 0 - 0.7 V ICTL CTL = 5V - 5 20 A Control block [CTL] CTL input voltage CTL1 to CTL6 input voltage Input current 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: service@aimtron.com.tw 6 AT1388 Preliminary Product Information 6-Channel DC-DC Converter for DSC Low battery detect block [LBI, LBO] LBI detect threshold 1.20 Detect Hysteresis -50 1.22 1.24 V +50 mV LBO output voltage low Isink=1mA - - 0.4 V LBO output high leakage VLBO=5V - 0.01 1 A - 1 10 A - 200 250 A - 5 7 mA - 2 2.5 mA General(Output no Load) CTL=CTL1=CTL2=CTL 3=CTL4=CTL5=CTL6=0 V CTL=0V, Icss(o) CTL1=CTL2=CTL3=CT L4=CTL5=CTL6="H" CTL=CTL1=CTL2=CTL Icc1 3=CTL4=CTL5=CTL6=" H" CTL="H" Icc2 CTL1=CTL2=CTL3=CT L4=CTL5=CTL6="L" Icss Standby current Power supply current Power supply current 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: service@aimtron.com.tw 7 AT1388 Preliminary Product Information 6-Channel DC-DC Converter for DSC Application Circuit 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: service@aimtron.com.tw 8 AT1388 Preliminary Product Information 6-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: service@aimtron.com.tw 9 AT1388 Preliminary Product Information 6-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: service@aimtron.com.tw 10 AT1388 Preliminary Product Information 6-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: service@aimtron.com.tw 11 AT1388 Preliminary Product Information 6-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(180C to peak) 5C/second max. 120 seconds max. Preheat Temperature(12520C) 10~150 seconds Temperature maintained above 180C 10~20 seconds Time within 5C of actual Peak Temperature Peak Temperature Range(Note 1) 219~225C or 235~240C Cooling Rate 6C /second max. 6 minutes max. Time 25C to Peak Temperature VPR 10C/second max. 60 seconds 219~225C or 235~240C 10C/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 219~225C VPR 219~225C IR/Convection 219~225C Convection 235~240C VPR 235~240C IR/Convection 235~240C 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: service@aimtron.com.tw 12