SC1631 Semtech Corporation, SC1631 Datasheet
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SC1631
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SC1631 Summary of contents
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... January 29, 1998 DESCRIPTION The SC1631 is a high efficiency step up DC-DC converter. Only four external components are required to deliver a fixed voltage of 3V, 3.3V, or 5V. Efficiency beyond 87% can be easily achieved at 100mA load with 2. input voltages. A logic-controlled shutdown mode is provided for power saving. Switch current limit can be programmed with a resistor ...
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... Shutdown Mode Current Recovery Time from Shutdown Efficiency SC1631/SC1631-3 SC1631-5 Line Regulation SC1631 SC1631-3 SC1631-5 Load Regulation SC1631/SC1631-3 SC1631-5 Oscillator Frequency LBI Pin Trip Point LBO “On Resistance” SW “On Resistance” SC1631/SC1631-3 SC1631-5 SW Off Leakage Input Pin Bias Current Output Pin Leakage © ...
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... January 29, 1998 TYPICAL PERFORMANCE CHARACTERISTICS © 1997 SEMTECH CORP. LOW VOLTAGE STEP-UP DC-DC CONVERTER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1631 ...
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... January 29, 1998 TYPICAL PERFORMANCE CHARACTERISTICS (cont.) TYPICAL APPLICATION CIRCUIT © 1997 SEMTECH CORP. LOW VOLTAGE STEP-UP DC-DC CONVERTER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1631 ...
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... January 29, 1998 APPLICATION EXAMPLES Figure 3. 1-Cell Input 3V Output Step-Up Converter © 1997 SEMTECH CORP. LOW VOLTAGE STEP-UP DC-DC CONVERTER Figure 1. 3V Output Step-Up Converter Figure 2. 5V Output Step-Up Converter 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1631 ...
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... January 29, 1998 APPLICATION EXAMPLES (cont.) Figure 4. 1-Cell Input 5V Output Step-Up Converter Figure 5. 4-Cell Input Step-Up/Step-Down Converter Figure 6. Low Supply Current Burst Mode Step-Up Converter © 1997 SEMTECH CORP. LOW VOLTAGE STEP-UP DC-DC CONVERTER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1631 ...
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... It serves to protect the IC and inductor, as well as to improve efficiency and output ripple. However, the supply ca- pability of the SC1631 is limited by the current limit resistor (see typical per- formance characteristics). The I pin should be shorted to V switch peak current is not required. ...