HN9261/A HN9261/A PFM Step-up DC/DC Converter Product Description The HN9261 series are PFM Step-up DC/DC ICs (pulse voltage regulators) with output voltages 1.5; 2.5; 3.3; 5.0V. The ICs of pulse voltage regulators are purposed for use in power supply sources of consumer & industrial electronic devices with battery-power sourcing. The application of this ICs permit to keep constant output voltage of power supply source even in the case of low charge level of the battery. The HN9261 consists of an oscillator, a PFM control circuit, a driver transistor (LX switch), a reference voltage unit, an error amplifier, resistors for voltage detection, and a LX switch protection circuit. A low ripple and high efficiency step-up DC/DC converter can be constructed of this HN9261 with only three external components. The HN9261A provides with a drive pin (EXT) for an external transistor, so that a power transistor can be externally applied. Therefore, the HN9261A IC is recommended for applications where large currents are required. EN pin enables circuit to set the standby supply current at a maximum of 0.5μȺ. Features Applications • Minimal Number of External Components ( Only • Power source for battery powered systems an inductor, a diode, and a capacitor) • Power source for cameras, VCRs, PDAs, • Ultra Low Input Current ( 5μȺ at Switch Off State) pagers, electronic data banks, and hand-held • High Output Voltage Accuracy ± 2% communications equipment • Low Ripple and Low Noise • Portable consumer equipment instrumentation • Low Start-up Voltage, 0.85V at 1mA • Power source for applications, which require . • 75% Efficiency with Low Cost Inductor • Low Temperature-Drift +50 ppm/°C higher voltage than that of batteries used in the applicances Ordering Information Pin Configurations (TOP VIEW) HN9261/APackage Type M : SOT-23-5 S : SOT-89 Operating Temperature Range C : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Output Voltage 15 : 1.5V 25 : 2.5V 33 : 3.3V 50 : 5.0V Use external switch Use internal switch Pin Description Pin Number 1 2 3 1 GND VOUT LX (TAB) 2 3 GND VOUT EXT (TAB) HN9261 HN9261A SOT-89 LX GND EXT GND 5 4 5 4 Pin Name Pin Function 2 1 CE Chip Enable Input (Active High) EN VOUT NC EN VOUT NC 2 VOUT Output Voltage HN9261 HN9261A 3 2 3 SOT-89 SOT-25 2 3 NC No Connected 1 4 GND Ground (Common) 3 5 LX Switching Pin 3 5 EXT External Control SOT-23-5 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 1 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Typical Application Circuit L1 D1 27uH 1N5819 VIN VOUT CO 22uF VIN ZTX 650 HN9261ACX EXT VOUT GND Tr Rb 300 Figure 1 L1 EN VOUT VIN Cb 0.01uF CO 22uF EXT ZTX 650 GND Tr Rb 300 EN Figure 3 + NC VIN 1N5819 HN9261ACB VOUT NC + 100uH D1 27uH 1N5819 HN9261CB LX VOUT VOUT CO 22uF Figure 2 D1 L1 + 100uH 1N5819 Cb 0.01uF + HN9261CX LX VOUT GND L1 D1 VOUT CO 22uF GND Figure 4 D1 1N5819 27uH VIN NC EN EN + HN9261CB LX VOUT L1 VOUT CO 22uF GND Figure 5 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 2 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Function Block Diagram VLX Limiter LX Vref LXSW Buffer VOUT GND - VFM Control + Error Amp. EXT OSC 100kHz Chip Enable EN Notes: (1) LX Pin...... only for 9261- CX and 9261- (2) EXT Pin.... only for 9261A(3) EN Pin...... only for 9261- CB CX and 9261ACB and 9261A- CB CB Absolute Maximum Ratings yOutput Voltage ------------------------------------------------------------------------------------------------------ 8V yLX Pin Voltage ------------------------------------------------------------------------------------------------------ 8V yEXT Pin Voltage ---------------------------------------------------------------------------------------------------- –0.3 to VOUT +0.3V yEN Pin Voltage ------------------------------------------------------------------------------------------------------ –0.3 to VOUT +0.3V yLX Pin Output Current -------------------------------------------------------------------------------------------- 250mA yEXT Pin Current ---------------------------------------------------------------------------------------------------- ±50mA o yPower Dissipation, PD @TA=25 C SOT-89 ---------------------------------------------------------------------------------------------------------------- 0.5W SOT-23 ---------------------------------------------------------------------------------------------------------------- 0.25W yPackage Thermal Resistance o SOT-89, șJC ---------------------------------------------------------------------------------------------------------- 100 C/W o SOT-89, șJA ---------------------------------------------------------------------------------------------------------- 300 C/W o SOT-23, șJA ---------------------------------------------------------------------------------------------------------- 250 C/W yOperation Temperature Range ---------------------------------------------------------------------------------- –20 to +85 oC o yStorage Temperature Range ------------------------------------------------------------------------------------- 165 C yLead Temperature Range (Soldering, 10sec.) --------------------------------------------------------------- 260 oC 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 3 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Electrical Characteristics (TA = 25ć, Parameter Output Voltage Accuracy For HN9261 application without external input transistor ) Symbol ¨VOUT Test Conditions Input Voltage VIN Start-up Voltage VST IOUT = 1mA; VIN: 0 ė 2V Hold-on Voltage VHO IOUT = 1mA; VIN: 2 ė 0V Min -2 Typ 0.85 Max +2 Units % 7,0 V 1,0 0,7 V V (1) HN9261-15 HN9261-25(2) Input Current 1 (2) HN9261-33 IIN1 To be measured at VIN at no load HN9261-50(3) 15 18 18 24 5 8 6 10 μA (1) HN9261-15 HN9261-25(2) Input Current 2 (2) HN9261-33 IIN2 To be measured at VOUT in switch off condition HN9261-50(3) HN9261-15 HN9261-25 60 ISWITCHING VLX = 0.4 V ILEAKAGE VEN-H VEN-L VLX = 6 V VIN = VOUT x 0.9 VIN = VOUT x 0.9 EN High Level Input Current IEN-H EN = VOUT - EN Low Level Input Current IEN-L EN = 0 V -0.5 Maximum Oscillator Frequency FMAX LX Switching Current HN9261-33 HN9261-50 LX Leakage Current EN High level voltage EN Low level voltage DOSC Oscillator Duty Cycle μA mA 80 0.5 0.4xVOUT 0.2 On (VLX "L") Side 0.5 μA V V μA μA 80 120 160 KHz 65 75 85 % (1) HN9261-15 HN9261-25(2) Efficiency 75 Ș (2) HN9261-33 HN9261-50(3) VLX Voltage Limit % 85 VLX LX switch on 0.65 0.8 1.0 V Note: (1) Unless otherwise provided, VIN=1.4V, IOUT=10mA, and External Circuit of Typical Application (2) Unless otherwise provided, VIN=1.8V, IOUT=10mA, and External Circuit of Typical Application (3) Unless otherwise provided, VIN=3.0V, IOUT=10mA, and External Circuit of Typical Application 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 4 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Electrical Characteristics (TA = 25ć, Parameter Output Voltage Accuracy For HN9261A application with external input transistor) Symbol ¨VOUT Input Voltage VIN Start-up Voltage VST Test Conditions Min -2 Typ IOUT = 1mA; VIN: 0 ė 2V Max +2 Units % 7,0 V 0.85 1,0 V 30 50 60 90 6 10 (1) HN9261A-15 (2) HN9261A-25 Input Current 1 (2) HN9261A-33 IIN1 To be measured at VIN at no load IIN2 To be measured at VOUT in switch off condition HN9261A-50(3) Input Current 2 μA μA HN9261A-15 EXT "H" Ouput Current HN9261A-25 HN9261A-33 HN9261A-50 HN9261A-15 EXT "L" Ouput Current HN9261A-25 IEXT-H -1.5 VEXT = VOUT - 0.4 V mA -2 1.5 HN9261A-33 HN9261A-50 EN High level voltage EN Low level voltage IEXT-L VEXT = 0.4 V VEN-H VEN-L VIN = VOUT x 0.9 VIN = VOUT x 0.9 EN High Level Input Current IEN-H EN = VOUT - EN Low Level Input Current IEN-L EN = 0 V -0.5 Maximum Oscillator Frequency FMAX 80 120 160 KHz Oscillator Duty Cycle DOSC On (VLX "L") Side 65 75 85 % mA 2 0.4xVOUT 0.2 0.5 V V μA μA (1) HN9261A-15 HN9261A-25(2) Efficiency (2) HN9261A-33 75 Ș HN9261A-50(3) VLX Voltage Limit % 85 VLX LX switch on 0.65 0.8 1.0 V Note: (1) Unless otherwise provided, VIN=1.4V, IOUT=10mA, and External Circuit of Typical Application (2) Unless otherwise provided, VIN=1.8V, IOUT=10mA, and External Circuit of Typical Application (3) Unless otherwise provided, VIN=3.0V, IOUT=10mA, and External Circuit of Typical Application 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 5 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Outline Dimension SOT-89-3 Surface Mount D D1 A B C C1 e e H A b Symbol b b1 Dimensions In Millimeters Min Max Min Max A 1.397 1.600 0.055 0.063 b 0.356 0.483 0.014 0.019 B 2.388 2.591 0.094 0.102 b1 0.406 0.533 0.016 0.021 C 3.937 4.242 0.155 0.167 C1 0.787 1.194 0.031 0.047 D 4.394 4.597 0.173 0.181 D1 1.397 1.753 0.055 0.069 e 1.448 1.549 0.057 0.061 H 0.356 0.432 0.014 0.017 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, Dimensions In Inches BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 6 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM HN9261/A Outline Dimension SOT-23-5 Surface Mount H D L B C b A A1 e Symbol Dimensions In Millimeters Min Max Min Max A 0.889 1.295 0.035 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.356 0.559 0.014 0.022 C 2.591 2.997 0.102 0.118 D 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008 ADD.: RM. 4004, Dimensions In Inches BLOCK B, NEW WORLD CENTRE, 电话(TEL.): (86)-25-68853600 NO. 88 ZHUJIANG ROAD, 7 NANJING 210008, CHINA 传真(FAX): (86)-25-68853600-810 WEB-SITE: WWW.HN-ELEC.COM