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MIC9130 Datasheet(PDF) 8 Page - Micrel Semiconductor |
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MIC9130 Datasheet(HTML) 8 Page - Micrel Semiconductor |
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8 / 19 page  MIC9130 Micrel, Inc. M9999-040805 8 April 2005 Functional Block Diagram RBIAS 1.21V OUT R S1 S2 Q SR Latch 2 Oscillator SYNC OSC 1.2V PWM COMP R1 R2 S Q Peak Current Limit Max. Duty Cycle 4µA 5V FB VCC PGND 5V ISNS SS VBIAS EN VCC UNDERVOLTAGE LOCKOUT Thermal Shutdown UVLO AGND BIAS REG 0.82V MAXIMUM DUTY CYCLE VCC UVLO LINE UVLO LINE Error Amplifier 1-Shot 5V CPWR Current Limit Selection 40µA 14 7 6 4 5 16 15 11 13 9 12 8 2 1 10 3 Figure 1 1000 10000 100000 1000000 10000 100000 1000000 10000000 FREQUENCY (Hz) Oscillator Frequency vs. RC Values 47pF 100pF 220pF 470pF 680pF 1000pF 2200pF *See applications section for higher switching frequencies |
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