Motorola MC33023P, MC33023DW, MC34023P, MC33023DWR2 Datasheet

High Speed Single-Ended

PWM Controller

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 current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

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

•Fully±Latched Logic with Double Pulse Suppression

•Latching PWM for Cycle±By±Cycle Current Limiting

•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

•Functionally Similar to the UC3823

		Simplified Application
	16	5.1V	15
	Vref
		Reference	VCC
	4
	Clock
	5	UVLO
	RT	Oscillator
	6
	CT
			13
	7		VC
	Ramp		14

Error Amp	3	Latching	12	Output
Output		PWM		Power
Noninverting	2	Error		Ground
		Amp
Input
Inverting	1		11
Input				Current
	8		9	Limit Ref
Soft±Start		Soft±Start		Current
				Limit/
				Shutdown
		10 Ground

This device contains 176 active transistors.

Order this document by MC34023/D

MC34023

MC33023

16

1

P SUFFIX

PLASTIC PACKAGE

CASE 648

16

1

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SO±16L)

PIN CONNECTIONS

Error Amp
Inverting Input	1					16	Vref
Error Amp							V
	2					15
Noninverting Input							CC
Error Amp Output	3					14	Output
Clock	4					13	VC
RT	5					12	Power Ground
							Current Limit
CT	6					11
							Reference
Ramp	7					10	Ground
							Current Limit/
Soft±Start	8					9
							Shutdown
		(Top View)

ORDERING INFORMATION

		Operating
	Device	Temperature Range	Package
	MC33023P	TA = ± 40° to +105°C	Plastic DIP
	MC33023DW		SO±16L
	MC34023P	TA = 0° to +70°C	Plastic DIP

Motorola, Inc. 1996

Rev 2

MC34023 MC33023

MAXIMUM RATINGS

Rating	Symbol	Value	Unit
Power Supply Voltage	VCC	30	V
Output Driver Supply Voltage	VC	20	V
Output Current, Source or Sink (Note 1)	IO		A
DC		0.5
Pulsed (0.5 μs)		2.0
Current Sense, Soft±Start, Ramp, and Error Amp Inputs	Vin	± 0.3 to +7.0	V
Error Amp Output and Soft±Start Sink Current	IO	10	mA
Clock and RT Output Current	ICO	5.0	mA
Power Dissipation and Thermal Characteristics
SO±16L Package (Case 751G)
Maximum Power Dissipation @ TA = + 25°C	PD	862	mW
Thermal Resistance, Junction±to±Air	RθJA	145	°C/W
DIP Package (Case 648)		1.25	W
Maximum Power Dissipation @ TA = + 25°C	PD
Thermal Resistance, Junction±to±Air	RθJA	100	°C/W
Operating Junction Temperature	TJ	+150	°C
Operating Ambient Temperature (Note 2)			°C
MC34023	TA	0 to +70
MC33023		± 40 to +105
Storage Temperature Range	Tstg	± 55 to +150	°C

ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 kΩ, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 2], unless otherwise noted.)

Characteristic			Symbol		Min	Typ	Max	Unit
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = + 25°C)			Vref		5.05	5.1	5.15	V
Line Regulation (VCC = 10 V to 30 V)			Regline		±	2.0	15	mV
Load Regulation (IO = 1.0 mA to 10 mA)			Regload		±	2.0	15	mV
Temperature Stability			TS		±	0.2	±	mV/°C
Total Output Variation over Line, Load, and Temperature			Vref		4.95	±	5.25	V
Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = + 25°C)			Vn		±	50	±	μV
Long Term Stability (TA = +125°C for 1000 Hours)			S		±	5.0	±	mV
Output Short Circuit Current			ISC		± 30	± 65	±100	mA
OSCILLATOR SECTION
Frequency								kHz
TJ = + 25°C			fosc		380	400	420
Line (VCC = 10 V to 30 V) and Temperature (TA = Tlow to Thigh)					370	400	430
Frequency Change with Voltage (VCC = 10 V to 30 V)			fosc/	V	±	0.2	1.0	%
Frequency Change with Temperature (TA = Tlow to Thigh)			fosc/	T	±	2.0	±	%
Sawtooth Peak Voltage			VOSC(P)		2.6	2.8	3.0	V
Sawtooth Valley Voltage			VOSC(V)		0.7	1.0	1.25	V
Clock Output Voltage								V
High State			VOH		3.9	4.5	±
Low State			VOL		±	2.3	2.9
NOTES: 1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for MC34023	Thigh	= +70°C for MC34023
= ± 40°C for MC33023		= +105°C for MC33023

2	MOTOROLA ANALOG IC DEVICE DATA

MC34023 MC33023

ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 kΩ, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 2], unless otherwise noted.)

Characteristic			Symbol	Min	Typ	Max	Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage			VIO	±	±	15	mV
Input Bias Current			IIB	±	0.6	3.0	μA
Input Offset Current			IIO	±	0.1	1.0	μA
Open±Loop Voltage Gain (VO = 1.0 V to 4.0 V)			AVOL	60	95	±	dB
Gain Bandwidth Product (TJ = + 25°C)			GBW	4.0	8.3	±	MHz
Common Mode Rejection Ratio (VCM = 1.5 V to 5.5 V)			CMRR	75	95	±	dB
Power Supply Rejection Ratio (VCC = 10 V to 30 V)			PSRR	85	110	±	dB
Output Current, Source (VO = 4.0 V)			ISource	0.5	3.0	±	mA
Sink (VO = 1.0 V)			ISink	1.0	3.6	±
Output Voltage Swing, High State (IO = ± 0.5 mA)			VOH	4.5	4.75	5.0	V
Low State (IO = 1 mA)			VOL	0	0.4	1.0
Slew Rate			SR	6.0	12	±	V/μs
PWM COMPARATOR SECTION
Ramp Input Bias Current			IIB	±	± 0.5	± 5.0	μA
Duty Cycle, Maximum			DC(max)	80	90	±	%
Minimum			DC(min)	±	±	0
Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V)			Vth	1.1	1.25	1.4	V
Propagation Delay (Ramp Input to Output, TJ = + 25°C)			tPLH(in/out)	±	60	100	ns
SOFT±START SECTION
Charge Current (VSoft±Start = 0.5 V)			Ichg	3.0	9.0	20	μA
Discharge Current (VSoft±Start = 1.5 V)			Idischg	1.0	4.0	±	mA
CURRENT SENSE SECTION
Input Bias Current (Pin 9(12) = 0 V to 4.0 V)			IIB	±	±	15	μA
Current Limit Comparator Input Offset Voltage (Pin 11(14) = 1.1 V)			VIO	±	±	45	mV
Current Limit Reference Input Common Mode Range (Pin 11(14))			VCMR	1.0	±	1.25	V
Shutdown Comparator Threshold			Vth	1.25	1.40	1.55	V
Propagation Delay (Current Limit/Shutdown to Output, TJ = + 25°C)			tPLH(in/out)	±	50	80	ns
OUTPUT SECTION
Output Voltage							V
Low State (ISink = 20 mA)			VOL	±	0.25	0.4
(ISink = 200 mA)				±	1.2	2.2
High State (ISource = 20 mA)			VOH	13	13.5	±
(ISource = 200 mA)				12	13	±
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 0.5 mA)			VOL(UVLO)	±	0.25	1.0	V
Output Leakage Current (VC = 20 V)			IL	±	100	500	μA
Output Voltage Rise Time (CL = 1.0 nF, TJ = + 25°C)			tr	±	30	60	ns
Output Voltage Fall Time (CL = 1.0 nF, TJ = + 25°C)			tf	±	30	60	ns
UNDERVOLTAGE LOCKOUT SECTION
Start±Up Threshold (VCC Increasing)			Vth(on)	8.8	9.2	9.6	V
UVLO Hysteresis Voltage (VCC Decreasing After Turn±On)			VH	0.4	0.8	1.2	V
TOTAL DEVICE
Power Supply Current			ICC				mA
Start±Up (VCC = 8.0 V)				±	0.5	1.2
Operating				±	20	30
NOTES: 1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for MC34023	Thigh	= +70°C for MC34023
= ± 40°C for MC33023		= +105°C for MC33023

MOTOROLA ANALOG IC DEVICE DATA	3

MC34023 MC33023

Figure 1. Timing Resistor versus

Oscillator Frequency

	100 k						VCC = 15 V
		1	3	5	7	9
							TA	= + 25°C
(Ω)			2	4	6	8
RESISTOR		CT =
	10 k	1. 100 nF
		2.	47 nF
		3.	22 nF
, TIMING
		4.	10 nF
		5.	4.7 nF
		6.	2.2 nF
T
		7. 1.0 nF
R	1.0 k
		8.	470 pF
		9.	220 pF
	470100		1000		104	105	106	107
			fosc, OSCILLATOR FREQUENCY (Hz)

Figure 2. Oscillator Frequency versus Temperature

	1200						RT = 1.2 k
(kHz)
	1000				1.0 MHz		CT = 1.0 nF
FREQUENCY
	800
	600	VCC = 15 V
, OSCILLATOR							RT = 3.6 k
					400 kHz
	400						CT = 1.0 nF
	200						RT = 36 k
osc						50 kHz	C = 1.0 nF
f							T
	0	± 25	0	25	50	75	100	125
	± 55
			TA, AMBIENT TEMPERATURE (°C)

Figure 3. Error Amp Open Loop Gain and	Figure 4. PWM Comparator Zero Duty Cycle
Phase versus Frequency	Threshold Voltage versus Temperature

(dB)	120							0		1.30
GAIN	100								(V)	1.28
								45°C)			VCC = 15 V
,OPEN LOOP VOLTAGE	80				Gain				CYCLE
										1.26	Pin 7(9) = 0 V
	60
									DUTY
			Phase
	40							90		1.24
								θ,EXCESSPHASE(	,ZERO
	20
									TH
VOL	0							135	V	1.22
A
	± 20	10	100	1.0 k	10 k	100 k	1.0 M	10 M		1.20	± 25	0	25	50	75	100	125
										± 55
				f, FREQUENCY (Hz)								TA, AMBIENT TEMPERATURE (°C)

	Figure 5. Error Amp Small Signal	Figure 6. Error Amp Large Signal
	Transient Response	Transient Response
2.55	V	3.0 V
2.5	V	2.5 V
2.45	V	2.0 V
	0.1 μs/DIV	0.1 μs/DIV

4	MOTOROLA ANALOG IC DEVICE DATA

MC34023 MC33023

Figure 7. Reference Voltage Change

Figure 8. Reference Short Circuit Current

			versus Source Current				SHORT CIRCUIT CURRENT (mA)			versus Temperature
REFERENCE VOLTAGE CHANGE (mV)	0							66
	± 5.0		TA = ± 55°C					65.6	VCC = 15 V
		VCC = 15 V
	± 10
					°			65.2
			°
	± 15		TA = +125 C		TA = + 25 C
	± 20							64.8
	± 25							64.4
,							REFERENCE,
ref
V	± 30							64
		10	20	30	40	50	SC
	0							± 55	± 25	0	25	50	75	100	125
							I
			ISource, SOURCE CURRENT (mA)							TA, AMBIENT TEMPERATURE (°C)

Figure 9. Reference Line Regulation

Figure 10. Reference Load Regulation

2.0 mV/DIV

2.0 mV/DIV

Vref LINE REGULATION 10 V to 24 V	Vref LOAD REGULATION 1.0 mA to 10 mA
(2.0 ms/DIV)	(2.0 ms/DIV)

Figure 11. Current Limit Comparator Input

(mV)		Offset Voltage versus Temperature
	100
VOLTAGE
	60	VCC = 15 V
INPUT OFFSET		Pin 11(14) = 1.1 V
	20
	± 20
LIMIT
,CURRENT	± 60
	± 100	± 25	0	25	50	75	100	125
IO	± 55
V			TA, AMBIENT TEMPERATURE (°C)

Figure 12. Shutdown Comparator Threshold

Voltage versus Temperature

	1.50
(V)	1.46	VCC = 15 V
VOLTAGE
	1.42
,THRESHOLD	1.38
	1.34
th
V
	1.30
	± 55	± 25	0	25	50	75	100	125
			TA, AMBIENT TEMPERATURE (°C)

MOTOROLA ANALOG IC DEVICE DATA	5

MC34023 MC33023

I chg, SOFT-START CHARGE CURRENT (μ A)

Figure 13. Soft±Start Charge Current	Figure 14. Output Saturation Voltage
versus Temperature	versus Load Current

10							(V)	0				Source Saturation
	VCC = 15 V								80	μs Pulsed Load
							VOLTAGE					(Load to Ground)
9.5								± 1.0	VCC = 15 V
9.0							SATURATION	2.0	120 Hz Rate
								± 2.0
									T	= 25°C
8.5									A
8.0							OUTPUT,
7.5								1.0					Sink Saturation
							sat					Ground	(Load to V		)
7.0							V	0							CC
± 55	± 25	0	25	50	75	100	125		0	0.2	0.4		0.6	0.8	1.0
		TA, AMBIENT TEMPERATURE (°C)									IO, OUTPUT LOAD CURRENT (A)

Figure 15. Drive Output Rise and Fall Time

Figure 16. Drive Output Rise and Fall Time

OUTPUT RISE & FALL TIME 1.0 nF LOAD	OUTPUT RISE & FALL TIME 10 nF LOAD
50 ns/DIV	50 ns/DIV

Figure 17. Supply Voltage versus Supply Current

	30
(mA)	25	RT = 3.65 kΩ
		CT = 1.0 nF
CURRENT	20
	15			VCC Increasing
, SUPPLY	10	VCC Decreasing
CC	5.0
I
	0
	0	4.0	8.0	12	16	20
		VCC, SUPPLY VOLTAGE (V)

6	MOTOROLA ANALOG IC DEVICE DATA