S34063 SUNTAC | Alldatasheet
Document overview
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Technical content
1.5 A, Step-Up/Down/
- Operation from 2.5 V to 30 V Input
- Low Standby Current
- Current Limiting
- Output Switch Current to 1.5 A
- Output V oltage Adjustable from 1.25 to 30V
- Frequency Operation from 100Hz to 100 kHz
- Precision 1%Reference
Figure 1. Representative Schematic Diagram This device contains 51 active transistors.
Power Supply Voltage VCC 40 Vdc Comparator Input Voltage Range VIR −0.3 to +40 Vdc Switch Collector Voltage VC(switch) 40 Vdc Switch Emitter Voltage (VPin 1 = 40 V) VE(switch) 40 Vdc Switch Collector to Emitter Voltage VCE(switch) 40 Vdc Driver Collector Voltage VC(driver) 40 Vdc Driver Collector Current (Note 1) IC(driver) 100 mA Switch Current ISW 1.5 A Power Dissipation and Thermal Characteristics Plastic Package, P, P1 Suffix TA = 25°C PD 1.25 W Thermal Resistance R JA 100 °C/W TA = 25°C PD 625 mW Thermal Resistance R JA 160 °C/W Operating Junction Temperature TJ +150 °C Operating Ambient Temperature Range TAS S3406 0 to +70 Storage Temperature Range Tstg −65 to +150 °C http://onsemi.com ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 4], unless otherwise specified.) Characteristics Symbol Min Typ Max Unit OSCILLATOR Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C) fosc 24 33 42 kHz Charge Current (VCC = 5.0 V to 40 V, TA = 25°C) Ichg 24 35 42 A Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) Idischg 140 220 260 A Discharge to Charge Current Ratio (Pin 7 to VCC , TA = 25°C) Idischg/Ichg 5.2 6.5 7.5 − Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C) Vipk(sense) 250 300 350 mV OUTPUT SWITCH (Note 5) Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, 8 connected) VCE(sat) − 1.0 1.3 V Saturation Voltage (Note 6) (ISW = 1.0 A, RPin 8 = 82 to VCC , Forced 20) VCE(sat) − 0.45 0.7 V DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C) hFE 50 75 − − Collector Off−State Current (VCE = 40 V) IC(off) − 0.01 100 A COMPARATOR Threshold Voltage TA = 25°C TA = Tlow to Thigh Vth 1.225 1.21 1.25 1.275 1.29 V Threshold Voltage Line Regulation (VCC = 5.0 V to 40 V) S34063 S33063 Reg line 1.4 1.4 5.0 6.0 mV Input Bias Current (Vin = 0 V) IIB − −20 −400 nA TOTAL DEVICE Supply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC , VPin 5 > Vth, Pin 2 = GND, remaining pins open) ICC − − 4.0 mA
330 C O
28 V/175 mA Vout
Figure 8. Step−Up Converter Figure 9. External Current Boost Connections for IC Peak Greater than 1.5 A
- If the output switch is driven into hard saturation (non−Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
non−Darlington configuration is used, the following output drive condition is recommended.
5.0 V/500 mA
470 C O
Figure 10. Step−Down Converter Figure 11. External Current Boost Connections for IC Peak Greater than 1.5 A