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SC4808B-2 Datasheet(PDF) 3 Page - Semtech Corporation |
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SC4808B-2 Datasheet(HTML) 3 Page - Semtech Corporation |
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3 / 28 page  3 © 2009 Semtech Corp. www.semtech.com SC4808B-2 POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified: VCC = 12V; CL = 100pF; T A = -40°C to 105°C Parameter Test Conditions Min Typ Max Unit VCC Under Voltage Lockout Start Threshold 4.0 4.40 4.5 V Hysteresis 100 140 200 mV Line Under Voltage Lockout Start Threshold R23 = 14k Ω, R33 = 10kΩ (see page 11) -3% VREF +3% V Hysteresis R23 = 14k Ω, R33 = 10kΩ (see page 11) 5.6% of VREF mV Soft Start Internal Soft Start Ramp 200 µs/V Soft Start Duration Rcs = 1k Ω (See formula in the application information section on page 18) 12 µs Soft Start Delay 140 µs Oscillator Oscillator Frequency R osc = 11k Ω, Cosc = 200pF 450 500 550 KHz Oscillator Ramp VREF/2 +0.25 V RC pin to GND capacitance 22 pF Oscillator Frequency Range 50 1000 KHz Sync/CLOCK Clock SYNC Threshold 1.0 V Sync Frequency Range F osc *1.3 KHz Bandgap Reference Voltage 2.970 3.125 3.280 V ReferenceCurrent 5 mA Overall Startup Current VCC < start threshold 150 µA Operating Supply Current FB = 0V, CS = 0V 7 mA VCC Zener Shunt Voltage IDD = 10mA 16 V Parameter Test Conditions Min Typ Max Unit VCC Under Voltage Lockout Start Threshold 4.0 4.40 4.5 V Hysteresis 100 140 200 mV Line Under Voltage Lockout Start Threshold R23 = 14k Ω, R33 = 10kΩ (see page 11) -3% VREF +3% V Hysteresis R23 = 14k Ω, R33 = 10kΩ (see page 11) 5.6% of VREF mV Soft Start Internal Soft Start Ramp 200 µs/V Soft Start Duration Rcs = 1k Ω (See formula in the application information section on page 18) 12 µs Soft Start Delay 140 µs Oscillator Oscillator Frequency R osc = 11k Ω, Cosc = 200pF 450 500 550 KHz Oscillator Ramp VREF/2 +0.25 V RC pin to GND capacitance 22 pF Oscillator Frequency Range 50 1000 KHz Sync/CLOCK Clock SYNC Threshold 1.0 V Sync Frequency Range F osc *1.3 KHz Bandgap Reference Voltage 2.970 3.125 3.280 V ReferenceCurrent 5 mA Overall Startup Current VCC < start threshold 150 µA Operating Supply Current FB = 0V, CS = 0V 7 mA VCC Zener Shunt Voltage IDD = 10mA 16 V Parameter Test Conditions Min Typ Max Unit VCC Under Voltage Lockout Start Threshold 4.0 4.40 4.5 V Hysteresis 100 140 200 mV Line Under Voltage Lockout Start Threshold R23 = 14k Ω, R33 = 10kΩ (see page 11) -3% VREF +3% V Hysteresis R23 = 14k Ω, R33 = 10kΩ (see page 11) 5.6% of VREF mV Soft Start Internal Soft Start Ramp 200 µs/V Soft Start Duration Rcs = 1k Ω (See formula in the application information section on page 18) 12 µs Soft Start Delay 140 µs Oscillator Oscillator Frequency R osc = 11k Ω, Cosc = 200pF 450 500 550 KHz Oscillator Ramp VREF/2 +0.25 V RC pin to GND capacitance 22 pF Oscillator Frequency Range 50 1000 KHz Sync/CLOCK Clock SYNC Threshold 1.0 V Sync Frequency Range F osc *1.3 KHz Bandgap Reference Voltage 2.970 3.125 3.280 V ReferenceCurrent 5 mA Overall Startup Current VCC < start threshold 150 µA Operating Supply Current FB = 0V, CS = 0V 7 mA VCC Zener Shunt Voltage IDD = 10mA 16 V |
Similar Part No. - SC4808B-2_09 |
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Similar Description - SC4808B-2_09 |
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