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LR9908 Datasheet(PDF) 3 Page - Leshan Radio Company |
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LR9908 Datasheet(HTML) 3 Page - Leshan Radio Company |
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3 / 8 page  Absolute Maximum Ratings (Unless otherwise specified, Ta=25℃) Parameter Symbol Ratings Unit VOUT pin voltage VOUT VSS－0.3 ~ VSS＋8 V EN pin voltage EN VSS－0.3 ~ VSS＋8 V Power dissipation SOT-23-5 PD 250 mW SOT-89-5 500 mW Operating temperature Topr － 40 ~＋85 ℃ Storage temperature Tstg － 40 ~＋125 ℃ Electrical Characteristics (Unless otherwise specified, Ta =25℃) Parameter Symbol Conditions Min. Typ. Max. Unit Feedback Voltage VFB － VFB(s) × 0.98 VFB VFB(s) × 1.02 V Input voltage VIN － － － 8 V Oscillation start voltage VST No external parts, voltage applied to VOUT LX pulled up to VOUT via 300Ω resistor 0.8 V Current consumption 1 ISS1 VCC=5V, Continuously Switching － 30 40 µA Current consumption 2 ISS2 VCC=5V, FB=2.5V, No Switching － 5 10 µA Shut Down Current ISSS VCC=5V,VEN=0 V － － 0.5 µA Line regulation ∆VOUT1 VIN= 0.4×VOUT～0.6×VOUT （ VOUT=5V） － 20 50 mV Load regulation ∆VOUT2 IOUT= 10 µA ~ 50mA（VOUT=5V） － 20 50 mV Oscillation frequency fOSC 100 kHz Duty ratio 1 Duty1 VOUT= 0.95×VOUT， measure waveform at LX pin 70 78 85 % Duty ratio 2 Duty2 Measure waveform at LX pin with light load － 66 － % Efficiency EFFI 85 % Shutdown pin input voltage VSH VOUT=0.95×VOUT， judge oscillation at EXT pin 0.75 － － V VSL1 VOUT= 0.95×VOUT， judge stop at EXT pin － － 0.3 V Shutdown pin input current ISH VEN＝8V － － 0.1 µA ISL VEN＝0V － － 0.1 µA Remark：1、VIN =VOUT(S) ×0.6 applied, IOUT=VOUT(S) / 250 Ω 2、Shutdown function built-in type: EN pin is connected to VOUT 3、VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage. LESHAN RADIO COMPANY, LTD. 3/8 |
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