 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Step-Up DC/DC Converter High Efficiency PFM ST1638 DESCRIPTION The ST1638 is a high efficiency PFM step-up DC/DC converter for application using battery powered devices. Only three external components are required to construct a low ripple, high efficiency converter. ST1638 can start up from 0.9V input voltage with 1mA load. The space saving SOT-89 and SOT-23 packages make ST1638 an ideal choice for spce conscious applications. PIN CONFIGURATION SOT-23-3L SOT-89 VOUT GND SW APPLICATIONS Battery Powered Devices Camera PDA Hand Held Communication Equipment Camcoder Power Source for Applications which Require Higher Voltage than Batteries can Provide SW GND VOUT FEATURES PART MARKING SOT-23-3L SOP-89 Larger than 85% Efficiency Low Startup Voltage, 0.9V at 1mA Low Ripple and Low Noise Low Quiescent Current Minimum Number of External Components SOT-89 and SOT-23 Small Package 638YA YG Year AG Day Code S1638 YW YG Year AG Day Code STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 1 Step-Up DC/DC Converter High Efficiency PFM TYPICAL APPLCTUON CIRCUIT ST1638 TEST CIRCUITS PIN DESCRIPTION Pin 1 2 3 Symbol GND VOUT SW Descripton Ground Output Voltage Switch Voltage STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page2 Step-Up DC/DC Converter High Efficiency PFM BLOCK DIAGRAM ST1638 ORDERING INFORMATION Part Number ST1638-XXS89 ST1638-XXS23 XX: Output Voltage Tape Reel; Pb - Fr Package SOT-89 SOT-23 Part Marking ST1638 1638 STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 3 Step-Up DC/DC Converter High Efficiency PFM ST1638 ABSOULTE MAXIMUN RATINGS ( Ta=25J , unless otherwise specified.) The following ratings designate persistent limits beyond which damage to the device may occur. Symbol VOUT VSW ISW Pd Pj Tstg Tlead Parameter DC Supply Vlotage SW Pin Voltage Switching Current Power Dissipation @ Ta=25J * SOT-89 SOT-23 Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperaature for 10 sec Value 6 6 0.6 0.5 0.25 -40 to 85 -65 to 150 Unit V V A W J J SOT-89 260 J SOT-23 220 Thermal Resistance Junction-Case(*) SOT-89 100 Rc jc J /W SOT-23 95 (*)The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 4 Step-Up DC/DC Converter High Efficiency PFM ST1638 ELECTRICAL CHARACTERISTICS (Ta=25J , Vcc=15V, unless otherwise specified.) Symbol VOUT IIN VSTART VHOLD IIN IS1 IS2 RON ILEAKAGE Fosc DOSC Parameter Output Voltage Accuracy Input Voltage Start Up Voltage Hold On Voltage Input Current at No Load Supply Current Supply Current SW Switch-On Resistance SW Leakage Current Max Oscillator Freq. Oscillator Duty Cycle Efficiency Conditions Min. -2.5 2V 0V 0.7 15 20 9 1 1.3 [ g A Typ. Max. Unit 2.5 % 6 V 0.8 0.9 V V g A 70 g A g A IOUT = 1 mA, VIN: 0/ IOUT = 1 mA, VIN: 2/ IOUT = 0 mA VS = VOUT X 0.95 VS = VOUT + 0.5V VS = VOUT X 0.95, VSW = 0.4V VSW = 6V VS = VOUT X 0.95 VS = VOUT X 0.95 80 65 120 75 85 0.5 160 85 KHz % % STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 5 Step-Up DC/DC Converter High Efficiency PFM SOT- 89 PACKAGE OUTLINE ST1638 STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 6 Green-Mode PWM Controller 300mA Driving Capability SOT-23-3L PACKAGE OUTLINE ST6850 STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA TEL: (650) 9389294 FAX: (650) 9389295 Page 7 |
Price & Availability of ST1638-XXS89
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |