Motorola MC34023 MC33023 Data Sheet / Manual
Summary
These high-speed pulse width modulator controllers in the MC34023 series are specialized for designing efficient Off-Line and DC-to-DC converter applications. Offering cost-effective performance with minimal external components, the IC integrates a temperature-compensated reference, wide bandwidth error amplifier, and protective features like UVLO and cycle-by-cycle current limiting. This manual provides detailed technical specifications, electrical characteristics, operational parameters, and configuration guides for designers building advanced power control systems.
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The MC34023 series are high speed, fixed frequency, single–ended pulse width modulator controllers optimized for high frequency operation. They are specifically designed for Off–Line and DC–to–DC converter applications offering the designer a cost–effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high speed
P SUFFIX
current sensing comparator, and a high current totem pole output ideally
PLASTIC PACKAGE
suited for driving a power MOSFET.
CASE 648
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle–by–cycle current limiting, and a latch for single pulse metering. The flexibility of this series allows it to be easily configured for either current mode or voltage mode control. 50 ns Propagation Delay to Output High Current Totem Pole Output Wide Bandwidth Error Amplifier
DW SUFFIX
Fully–Latched Logic with Double Pulse Suppression
PLASTIC PACKAGE
Latching PWM for Cycle–By–Cycle Current Limiting CASE 751G
(SO–16L)
Soft–Start Control with Latched Overcurrent Reset Input Undervoltage Lockout with Hysteresis Low Start–Up Current (500 µA Typ) Internally Trimmed Reference with Undervoltage Lockout 90% Maximum Duty Cycle (Externally Adjustable) Precision Trimmed Oscillator
Voltage or Current Mode Operation to 1.0 MHz PIN CONNECTIONS
Functionally Similar to the UC3823
Error Amp
Inverting Input Vref
Error Amp
Noninverting Input
Simplified Application Error Amp Output Output
Clock VC
5.1V RT Power Ground
Reference
VCC Current Limit
Clock Reference Ramp Ground
RT Current Limit/
Soft–Start
Oscillator Shutdown
(Top View)
Output
Error Amp Latching Output PWM Power
Error
Noninverting Ground
Input
ORDERING INFORMATION
Inverting Input Current Operating
Limit Ref Device Temperature Range Package Soft–Start Current
Soft–Start
Limit/ MC33023P Plastic DIP Shutdown TA = –40° to +105°C
MC33023DW SO–16L
Ground10
MC34023P TA = 0° to +70°C Plastic DIP
This device contains 176 active transistors.
Motorola, Inc. 1996 Rev 2
1MOTOROLA ANALOG IC DEVICE DATA
Page Summary Contents For Motorola MC34023 MC33023 Data Sheet / Manual
Manual Details
| Brand | Motorola |
|---|---|
| Pages | 19 |
| File Size | 474.72 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What applications are the MC34023 series optimized for?
They are optimized for Off-Line and DC-to-DC converter applications, designed to be cost-effective with minimal external components.
Does the device offer multiple control options?
Yes, it allows easy configuration for either current mode or voltage mode control. It also supports Voltage or Current Mode Operation up to 1.0 MHz.
What protective features are included with this series?
It includes protective features such as input and reference undervoltage lockouts (UVLO) both with hysteresis, cycle-by-cycle current limiting, and a latch for single pulse metering.
What is the operating temperature range for the MC33023?
The MC33023 device operates in the temperature range of –40° to +105°C.