AN8017SA-E1 Panasonic

Voltage Regulators AN8017SA 1.8-volt 2-channel step-up DC-DC converter control IC Overview Unit: mm The AN8017SA is a two-channel PWM DC-DC con- verter control IC that features low-voltage operation. 5.000.20 This IC can obtain the step-up voltage with a small 16 9 number of external components. (1.0) The minimum operating voltage is as low as 1.8 V so that it can operate with two dry batteries. In addition, since it uses the 16-pin surface mounting type package 0 to 10 with 0.65 mm pitch, it is suitable for a miniaturized highly 0.500.20 18 efficient potable power supply. Features (0.225) 0.65 Wide operating supply voltage range (1.8 V to 14 V) Seating plane +0.10 0.22 0.05 Incorporating a high precision reference voltage circuit (allowance: 2%) SSOP016-P-0225A Control in a wide output frequency range is possible (20 kHz to 1 MHz) Note) The package of this product will be changed Built-in wideband error amplifier to lead-free type (SSOP016-P-0225E). See the (single gain bandwidth: 10 MHz typical) package dimensions section later of this A built-in timer latch short-circuit protection circuit datasheet. (charge current: 1.1 A typical) Incorporating an under-voltage lock-out circuit (U.V.L.O.) (circuit operation-starting voltage: 1.67 V typical) Dead-time is variable Flatness of switching current can be obtained by staggering the turn-on timing of each channel Built-in unlatch function When DT1 pin is low level or DT2 pin is high level, independent turn-off is possible. Incorporating an on/off control function (active-high control input, standby mode current: 1 A maximum) Parallel operation is possible Totem pole output Output source-current: 50 mA maximum (Constant current output with a less supply voltage fluctuation is possible by connecting an external resistor to pin 6 and pin 11) Output sink-current: +80 mA maximum Applications LCD displays, digital still cameras, and PDAs Publication date: November 2001 SDH00007CEB 1 Maintenance/ Discontinued Please visit following URL about latest information. AN8017SA Block Diagram 1.19 V V REF 15 On/off Reference Triangular wave V Off CC voltage source control oscillation 6 V RB1 REF 0.9 V 4 FB1 0.2 V PWM1 Unlatch1 Error amp.1 7 3 Out1 IN1 U.V.L.O. H 1.19 V L Latch V 0.9 V CC R 11 Q RB2 13 S FB2 S.C.P. comp. V REF Error 0.22 V PWM2 amp.2 14 10 IN+2 Out2 0.9 V 0.9 V 1.19 V V REF Unlatch2 8 GND Pin Descriptions Pin No. Symbol Description Pin No. Symbol Description 8 GND Grounding pin 1 OSC Pin for connecting a oscillation timing resistor and capacitor 9V Power supply voltage application pin CC 10 Out2 Out2 block push-pull type output pin 2 S.C.P. Pin for connecting the time constant set- ting capacitor for short-circuit protection 11 RB2 Out2 block output source current setting resistor connection pin 3IN1 Inverting input pin to error amplifier 1 block 12 DT2 PWM2 block dead-time setting pin 4 FB1 Output pin of error amplifier 1 block 13 FB2 Output pin of error amplifier 2 block 5 DT1 PWM1 block dead-time setting pin 14 IN+2 Error amplifier 2 block noninverting input pin 6 RB1 Out1 block output source current setting resistor connection pin 15 Off On/off control pin 7 Out1 Out1 block push-pull type output pin 16 V Reference voltage output pin REF SDH00007CEB 2 Maintenance/ Discontinued Please visit following URL about latest information.