IP35063 SEME-LAB | Alldatasheet

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Technical content

J Package – 8 Pin Ceramic DIP N Package – 8 Pin Plastic DIP Part J–Pack N–Pack D–8 Temp. Number 8 Pin 8 Pin 8 Pin Range IP35063 ✔ -55 to +125°C IP33063 ✔✔✔ -40 to +85°C IP34063 ✔✔✔ 0 to +70°C

FEATURES

  • Operation from 2.5 to 40V input
  • Low Standby Current
  • Current Limiting
  • Output switch current of 1.5A
  • Output voltage adjustable from 1.25 to 40V
  • Operating frequency from 100Hz to 100kHz
  • Direct replacement for MC34063/MC34063A series Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage Switch Collector to Emitter Voltage Driver Collector Voltage Switch Current Power Dissipation @ T amb = 25°C Ceramic Packages Plastic Packages Derate above 25°C Operating Junction Temperature Ceramic Packages Plastic Packages Operating Ambient Temperature Range See Table Above Storage Temperature Range +40V –0.3V to +40V 40V 40V 40V 40V 1.5A 1.25W 10mW/°C 150°C 125°C See Table Above –65 to 150°C ABSOLUTE MAXIMUM RATINGS VCC SWITCH COLLECTOR SWITCH EMITTER TIMING CAPACITOR GND Ipk SENSE DRIVER COLLECTOR COMPARATOR INVERTING INPUT DC–DC CONVERTER CONTROL CIRCUIT Order Information Note: To order, add the package identifier to the part number. eg. IP35063D–8

Parameter Test Conditions Min. Typ. Max. Units 20 35 50 150 200 250 0.5 6.0 250 300 350 1 1.3 0.45 0.7 35 120 1.18 1.25 1.32 0.04 0.2 40 400 2.4 3.5 Charging Current Discharge Current Voltage Swing Discharge to Charge Current Ratio Current Limit Sense Voltage Saturation Voltage, Darlington Connection * Saturation Voltage * DC Current Gain Collector Off–State Current Threshold Voltage * Threshold Voltage Line Regulation * Input Bias Current * Supply Current * V CC = 5 to 40V VCC = 5 to 40V Ipk(sense)= VCC Ichg = Idischg ISW = 1.0A ISW = 1.0A IC(Driver)= 50mA (Forced β = 20) ISW = 1.0A , VCE = 5.0V VCE = 40V VCC = 3 to 40V VIN = 0V VCC = 5 to 40V C T = 0.001µF Ipk(sense)= VCC VPIN 5> Vth Pin 2 = Gnd , Remaining Pins Open. µA µA Vpp mV V V nA V mV/V nA mA ELECTRICAL CHARACTERISTICS (Test Parameters unless otherwise stated : VCC = 5V , TJ = 25°C) OUTPUT SWITCH COMPARATOR TOTAL DEVICE OSCILLATOR NOTES * Applies over full operating temperature range (see order information). 1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω Switch Collector Switch Emitter Timing Capacitor Gnd Driver Collector I Sensepk V CC Comparator Inverting Input

DESCRIPTION

The IP34063 series of control circuits contains all the functions required to implement DC–DC converters. Included are internal voltage reference, comparator, controlled duty cycle oscillator with current limit circuit, driver, and high current output switch. This series was specifically designed to be incorporated in Step-Down (Buck) and Step-Up (Boost) applications with a minimum number of external components.

(tON + tOFF )MAX C T Ipk(switch) R SC L(MIN) C O VOUT + VF VIN(MAX) - VSAT - VOUT fMIN 4 x 10-5tON

2 IOUT(MAX)

0.33 / Ipk(switch) VIN(MAX) - VSAT - VOUT tON(MAX)Ipk(switch) Ipk(switch)(tON + tOFF )

8 Vripple(p–p)

VOUT + VF - VIN(MIN) VIN(MIN)- VSAT fMIN 4 x 10-5tON tON + tOFF2 IOUT(MAX) tOFF 0.33 / Ipk(switch) VIN(MIN)- VSAT tON(MAX)Ipk(switch) IOUT tON Vripple DESIGN FORMULA TABLE Calculation Step–Down Step–Up KEY VSAT — Saturation voltage of the output switch. VF — Forward voltage drop of the ringback rectifier. The following power supply characteristics must be chosen:– VIN — Nominal input voltage. If this voltage is not constant, then use VIN(MAX) for step–down and VIN(Min) for step–up converter. R2VOUT — Desired output voltage, VOUT = 1.25 1 + .R1 IOUT — Desired output current. fMIN — Minimum desired output switching frequency at the selected values for VIN and IO . Vripple(p–p)— Desired peak–to–peak output ripple voltage. In practice, the calculated value will need to be increased due to the capacitors equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. ( )

1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω 1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω Ipk V CC 2.2K 47K 28V 175mA V OUT 1500 µF 100 µF 0.22 Ω 12V V IN 180 Ω L 170 µH 1N5819 R SC C O 1500pF C T C T 1.2K 3.3K 470pF C T100 µF 0.33 Ω L 220 µH 1N5822 Ipk V CC 5.0V 500mA V OUT 25V V IN 470 µF C O R SC C T Step–Down Converter Step–Up Converter 1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω 1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω V IN R SC V OUT V IN R SC V OUT Step–Down, External NPN Switch Step–Up, External NPN Switch 1.25 V REFERENCE REGULATOR COMPARATOR OSCILLATOR S R Q 170 Ω 1.25 V REFERENCE REGULATOR COMPARATOR OSCI LLATOR S R Q 170 Ω V IN R SC V OUT V IN R SC V OUT R – 0 FOR CONSTANT V IN Step–Down, External PNP Saturated Switch Step–Up, External NPN Saturated Switch External Current Boost Connections for IC > 1.5A

TYPICAL PERFORMANCE CHARACTERISTICS 0.50.2 5 25 0 1 0 0 2011 00.1 100 500 1000 200 OSCILLATOR TIMING CAPACITOR (nF)C T OUTPUT SWITCH ON–OFF TIME ( µs) V = 5VCC pk(sense)I = VCC Pin 5 = Gnd ton toff Output Switch On–Off Time vs Oscillator Timing Capacitor Standby Supply Current vs Supply Voltage SUPPLY CURRENT (mA)ICC 400 3.2 2.4 1.6 0.8 5 10 25 30 3515 20 SUPPLY VOLTAGE (V)V CC Pin 2 = Gnd pk(sense)I = VCC C = 0.001µFT 1.2 1.3 1.5 1.4 1.6 1.1 1.0 SATURATION VOLTAGE (V)VCE(sat) EMITTER CURRENT (A)IE V = 5VCC Pin 3,5 = Gnd Pin 1,7,8 = VCC Emitter–Follower Configuration Output Switch Saturation Voltage vs Emitter Current Common–Emitter Configuration Output Switch Saturation Voltage vs Collector Current SATURATION VOLTAGE (V)VCE(sat) COLLECTOR CURRENT (A)IC 0.4 0.6 1.0 0.8 1.2 0.2 V = 5VCC Pin 2,3,5 = Gnd Pin 7 = VCC DARLINGTON CONNECTION FORCED β = 20