MC34063ABD-TR Model Information

General Information

• Order Code: MC34063ABD-TR
• Description: DC-DC Converter Control Circuit
• Package Type: SO-8
• Operating Temperature Range: -40°C to 85°C
• Revision: Rev 13
• Date: January 2025

Features

• Output switch current in excess of 1.5 A
• 2% reference accuracy
• Low quiescent current: 2.5 mA (typ.)
• Operating from 3 V to 40 V
• Frequency operation to 100 kHz
• Active current limiting

Pin Configuration

• Pin 1 (SWC): Switch collector
• Pin 2 (SWE): Switch emitter
• Pin 3 (TC): Timing capacitor
• Pin 4 (GND): Ground
• Pin 5 (CII): Comparator inverting input
• Pin 6 (VCC): Voltage supply
• Pin 7 (IPK): IPK sense
• Pin 8 (DRC): Voltage driver collector

Maximum Ratings

• Power Supply Voltage (VCC): 50 V
• Comparator Input Voltage Range (VIR): -0.3 to 40 V
• Switch Collector Voltage (VSWC): 40 V
• Switch Emitter Voltage (VSWE): 40 V
• Switch Collector to Emitter Voltage (VCE): 40 V
• Driver Collector Voltage (VDC): 40 V
• Driver Collector Current (IDC): 100 mA
• Switch Current (ISW): 1.5 A
• Power Dissipation (PTOT): 0.625 W (SO-8)
• Operating Junction Temperature (TJ): 150°C
• Storage Temperature Range (TSTG): -40 to 150°C
• Operating Ambient Temperature Range (TOP): -40 to 85°C

Electrical Characteristics

Oscillator

• Frequency (fOSC): 24 kHz to 42 kHz (VPIN5 = 0V, CT = 1 nF, TA = 25°C)
• Charge Current (ICHG): 24 µA to 42 µA (VCC = 5 to 40V, TA = 25°C)
• Discharge Current (IDISCHG): 140 µA to 260 µA (VCC = 5 to 40V, TA = 25°C)
• Discharge to Charge Current Ratio (IDISCHG/ICHG): 5.2 to 7.5 µA (PIN 7 = VCC, TA = 25°C)
• Current Limit Sense Voltage (VIPK(sense)): 250 mV to 350 mV (ICHG = IDISCHG, TA = 25°C)

Output Switch

• Saturation Voltage (VCE(sat)): 1 V to 1.3 V (ISW = 1 A, PIN 1, 8 connected)
• Saturation Voltage (VCE(sat)): 0.45 V to 0.7 V (ISW = 1 A, RPIN8 = 82 Ω to VCC)
• DC Current Gain (hFE): 50 to 120 (ISW = 1 A, VCE = 5 V, TA = 25°C)
• Collector Off-State Current (IC(off)): 0.01 µA to 100 µA (VCE = 40 V)

Comparator

• Threshold Voltage (VTH): 1.225 V to 1.275 V (TA = 25°C)
• Threshold Voltage Line Regulation (Regline): 1 mV to 10 mV (VCC = 3 to 40 V)
• Input Bias Current (IIB): -5 nA to -400 nA (VIN = 0 V)

Thermal Data

• Thermal Resistance Junction-Ambient (RthJA): 160 °C/W (SO-8)
• Thermal Resistance Junction-Case (RthJC): 20 °C/W (SO-8)

Typical Performance Characteristics

• Emitter Follower Configuration Output Saturation Voltage: 1.4 V to 1.75 V (Vcc = 5V, Ia = 25 mA)
• Common Emitter Configuration Output Switch Saturation Voltage: 0.2 V to 0.8 V (Vcc = 5V, IC = 1 A)
• Output Switch ON-OFF Time: 50 ns to 200 ns (Vcc = 5V, CT = 1 nF)
• Darlington Configuration Collector-Emitter Saturation Voltage (VCEsat): 0.4 V to 0.8 V (TA = 25°C)
• Current Limit Sense Voltage (VIPK) vs. Temperature: 250 mV to 350 mV (TA = 25°C)
• Reference Voltage vs. Temperature: 1.225 V to 1.275 V (Vcc = 5V)
• Bias Current vs. Temperature: -5 nA to -400 nA (TA = 25°C)
• Supply Current vs. Temperature: 2.5 mA to 4 mA (TA = 25°C)
• Supply Current vs. Input Voltage: 2.5 mA to 4 mA (Vcc = 5V)

Typical Application Circuits

Step-Up Converter

• Output Voltage (VOUT): 28 V
• Output Current (IO): 175 mA
• Line Regulation: 30 mV (VIN = 8 to 16 V, IO = 175 mA)
• Load Regulation: 10 mV (VIN = 12 V, IO = 75 to 175 mA)
• Output Ripple: 300 mV (VIN = 12 V, IO = 175 mA)
• Efficiency: 89% (VIN = 12 V, IO = 175 mA)

Step-Down Converter

• Output Voltage (VOUT): 5 V
• Output Current (IO): 500 mA
• Line Regulation: 5 mV (VIN = 15 to 25 V, IO = 500 mA)
• Load Regulation: 30 mV (VIN = 25 V, IO = 50 to 500 mA)
• Output Ripple: 100 mV (VIN = 25 V, IO = 500 mA)
• Efficiency: 80% (VIN = 25 V, IO = 500 mA)
• Short Circuit Current (ISC): 1.2 A (VIN = 25 V, RLOAD = 0.1 Ω)

Voltage Inverting Converter

• Output Voltage (VOUT): 12 V
• Output Current (IO): 100 mA
• Line Regulation: 15 mV (VIN = 4.5 to 6 V, IO = 100 mA)
• Load Regulation: 20 mV (VIN = 5 V, IO = 10 to 100 mA)
• Output Ripple: 230 mV (VIN = 5 V, IO = 100 mA)
• Efficiency: 58% (VIN = 5 V, IO = 100 mA)
• Short Circuit Current (ISC): 0.9 A (VIN = 5 V, RLOAD = 0.1 Ω)

Package Mechanical Data

• Package Type: SO-8
• Dimensions:A: 1.35 mm to 1.75 mmA1: 0.10 mm to 0.25 mmA2: 1.10 mm to 1.65 mmB: 0.33 mm to 0.51 mmC: 0.19 mm to 0.25 mmD: 4.80 mm to 5.00 mmE: 3.80 mm to 4.00 mme: 1.27 mmH: 5.80 mm to 6.20 mmh: 0.25 mm to 0.50 mmL: 0.40 mm to 1.27 mmk: 8° (max.)

Tape and Reel Data

• Tape Width (A): 12.8 mm to 13.2 mm
• Reel Diameter (C): 20.2 mm
• Reel Width (N): 60 mm
• Tape Length (T): 22.4 mm
• Reel Height (Ao): 8.1 mm to 8.5 mm
• Reel Width (Bo): 5.5 mm to 5.9 mm
• Reel Height (Ko): 2.1 mm to 2.3 mm
• Reel Width (Po): 3.9 mm to 4.1 mm
• Reel Height (P): 7.9 mm to 8.1 mm

Revision History

• 20-Nov-2007: Revision 10 - Added Table 1.
• 24-Apr-2013: Revision 11 - Removed note in Table 1.
• 11-Feb-2020: Revision 12 - Corrected a typo on Regline parameter (from 5 mV Max. to 10 mV Max.) in Table 7: Comparator.
• 14-Jan-2025: Revision 13 - Updated Note in Table 8.