SLLS636N December   2004  – January 2015 MC33063A , MC34063A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Description
  3. 3 Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics—Oscillator
    6. 6.6 Electrical Characteristics—Output Switch
    7. 6.7 Electrical Characteristics—Comparator
    8. 6.8 Electrical Characteristics—Total Device
    9. 6.9 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Standard operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 External Switch Configurations for Higher Peak Current
    2. 8.2 Typical Application
      1. 8.2.1 Voltage-Inverting Converter Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Performance
      2. 8.2.2 Step-Up Converter Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Performance
      3. 8.2.3 Step-Down Converter Application
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Performance
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC Supply voltage 40 V
VIR Comparator inverting input voltage range –0.3 40 V
VC(switch) Switch collector voltage 40 V
VE(switch) Switch emitter voltage VPIN1 = 40 V 40 V
VCE(switch) Switch collector to switch emitter voltage 40 V
VC(driver) Driver collector voltage 40 V
IC(driver) Driver collector current 100 mA
ISW Switch current 1.5 A
TJ Operating virtual junction temperature 150 °C
Tstg Storage temperature range –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 2500 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) 1500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN MAX UNIT
VCC Supply voltage 3 40 V
TA Operating free-air temperature MC33063A –40 85 °C
MC34063A 0 70

6.4 Thermal Information

THERMAL METRIC(1) MC33063A UNIT
D DRJ P
8 PINS
RθJA Junction-to-ambient thermal resistance 97 41 85 °C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).

6.5 Electrical Characteristics—Oscillator

VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TA MIN TYP MAX UNIT
fosc Oscillator frequency VPIN5 = 0 V, CT = 1 nF 25°C 24 33 42 kHz
Ichg Charge current VCC = 5 V to 40 V 25°C 24 35 42 μA
Idischg Discharge current VCC = 5 V to 40 V 25°C 140 220 260 μA
Idischg/Ichg Discharge-to-charge current ratio VPIN7 = VCC 25°C 5.2 6.5 7.5 —
VIpk Current-limit sense voltage Idischg = Ichg 25°C 250 300 350 mV

6.6 Electrical Characteristics—Output Switch

VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)(1)
PARAMETER TEST CONDITIONS TA MIN TYP MAX UNIT
VCE(sat) Saturation voltage –
Darlington connection		 ISW = 1 A, pins 1 and 8 connected Full range 1 1.3 V
VCE(sat) Saturation voltage –
non-Darlington connection(2)		 ISW = 1 A, RPIN8 = 82 Ω to VCC,
forced β ∼ 20		 Full range 0.45 0.7 V
hFE DC current gain ISW = 1 A, VCE = 5 V 25°C 50 75 —
IC(off) Collector off-state current VCE = 40 V Full range 0.01 100 μA
(1) Low duty-cycle pulse testing is used to maintain junction temperature as close to ambient temperature as possible.
(2) In the non-Darlington configuration, if the output switch is driven into hard saturation at low switch currents (≤300 mA) and high driver currents (≥30 mA), it may take up to 2 μs for the switch to come out of saturation. This condition effectively shortens the off time at frequencies ≥30 kHz, becoming magnified as temperature increases. The following output drive condition is recommended in the non-Darlington configuration:
Forced β of output switch = IC,SW / (IC,driver – 7 mA) ≥ 10, where ∼7 mA is required by the 100-Ω resistor in the emitter of the driver to forward bias the Vbe of the switch.

6.7 Electrical Characteristics—Comparator

VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TA MIN TYP MAX UNIT
Vth Threshold voltage 25°C 1.225 1.25 1.275 V
Full range 1.21 1.29
ΔVth Threshold-voltage line regulation VCC = 5 V to 40 V Full range 1.4 5 mV
IIB Input bias current VIN = 0 V Full range –20 –400 nA

6.8 Electrical Characteristics—Total Device

VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS TA MIN MAX UNIT
ICC Supply current VCC = 5 V to 40 V, CT = 1 nF,
VPIN7 = VCC, VPIN5 > Vth,
VPIN2 = GND, All other pins open		 Full range 4 mA

6.9 Typical Characteristics

g_t_onoff_c_osctim_lls636.gifFigure 1. Output Switch On-Off Time vs
Oscillator Timing Capacitor
g_vce_ic_lls636.gifFigure 3. Output Switch Saturation Voltage vs
Collector Current (Common-Emitter Configuration)
g_vce_ie_lls636.gifFigure 2. Output Switch Saturation Voltage vs
Emitter Current (Emitter-Follower Configuration)
g_icc_vcc_lls636.gifFigure 4. Standby Supply Current vs Supply Voltage