Motorola MC34167TH, MC34167TV, MC34167D2T, MC33167TH, MC33167TV Datasheet

						Order this document by MC34167/D
					MC34167
Power	Switching	Regulators			MC33167
The MC34167, MC33167 series are high performance fixed frequency
power switching regulators that contain the primary functions required for
dc±to±dc converters. This series was specifically designed to be					POWER SWITCHING
incorporated in step±down and voltage±inverting configurations with a
minimum number	of external components	and can	also be	used cost		REGULATORS
effectively in step±up applications.
These devices consist of an internal temperature compensated						SEMICONDUCTOR
reference, fixed frequency oscillator with on±chip timing components,
latching pulse width modulator for single pulse metering, high gain error						TECHNICAL DATA
amplifier, and a high current output switch.
Protective features consist of cycle±by±cycle current limiting,
undervoltage lockout, and thermal shutdown. Also included is a low power					TH SUFFIX
standby mode that reduces power supply current to 36 μA.
• Output Switch Current in Excess of 5.0 A					PLASTIC PACKAGE
					CASE 314A
• Fixed Frequency Oscillator (72 kHz) with On±Chip Timing
• Provides 5.05 V Output without External Resistor Divider							1
• Precision 2% Reference							5
• 0% to 95% Output Duty Cycle					1		TV SUFFIX
• Cycle±by±Cycle Current Limiting
							PLASTIC PACKAGE
• Undervoltage Lockout with Hysteresis						5	CASE 314B
• Internal Thermal Shutdown					Heatsink surface connected to Pin 3.
• Operation from 7.5 V to 40 V
• Standby Mode Reduces Power Supply Current to 36 μA					T SUFFIX
• Economical 5±Lead TO±220 Package with Two Optional Leadforms					PLASTIC PACKAGE
					CASE 314D
• Also Available in Surface Mount D2PAK Package							1
							5
					Pin	1.	Voltage Feedback Input
						2.	Switch Output
						3.	Ground
	Simplified Block Diagram					4.	Input Voltage/VCC
						5.	Compensation/Standby
	(Step Down Application)		Vin
	ILIMIT		4				D2T SUFFIX
							PLASTIC PACKAGE
							CASE 936A
Oscillator					1		(D2PAK)
	S				5
	Q		2		Heatsink surface (shown as terminal 6
	R				in case outline drawing) is connected to Pin 3.
PWM
	UVLO				ORDERING INFORMATION
Thermal				L			Operating
					Device	Temperature Range		Package
	Reference
					MC33167D2T			Surface Mount
	EA				MC33167T	TA = ± 40° to +85°C		Straight Lead
			1		MC33167TH			Horiz. Mount
				VO
					MC33167TV			Vertical Mount
				5.05 V/5.0 A
					MC34167D2T			Surface Mount
3	5				MC34167T		TA = 0° to + 70°C	Straight Lead
					MC34167TH			Horiz. Mount
	This device contains 143 active transistors.				MC34167TV			Vertical Mount

Motorola, Inc. 1996

Rev 3

MC34167 MC33167

MAXIMUM RATINGS

Rating	Symbol	Value	Unit
Power Supply Input Voltage	VCC	40	V
Switch Output Voltage Range	VO(switch)	±2.0 to + Vin	V
Voltage Feedback and Compensation Input	VFB, VComp	±1.0 to + 7.0	V
Voltage Range
Power Dissipation
Case 314A, 314B and 314D (TA = +25°C)	PD	Internally Limited	W
Thermal Resistance, Junction±to±Ambient	θJA	65	°C/W
Thermal Resistance, Junction±to±Case	θJC	5.0	°C/W
Case 936A (D2PAK) (T = +25°C)	P	Internally Limited	W
A	D
Thermal Resistance, Junction±to±Ambient	θJA	70	°C/W
Thermal Resistance, Junction±to±Case	θJC	5.0	°C/W
Operating Junction Temperature	TJ	+150	°C
Operating Ambient Temperature (Note 3)	TA		°C
MC34167		0 to + 70
MC33167		± 40 to + 85
Storage Temperature Range	Tstg	± 65 to +150	°C

ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TA = +25°C, for min/max values TA is the operating ambient temperature range that applies [Notes 2, 3], unless otherwise noted.)

Characteristic		Symbol	Min	Typ	Max	Unit
OSCILLATOR
Frequency (VCC = 7.5 V to 40 V)	TA = +25°C	fOSC	65	72	79	kHz
	TA = Tlow to Thigh		62	±	81
ERROR AMPLIFIER
Voltage Feedback Input Threshold	TA =+ 25°C	VFB(th)	4.95	5.05	5.15	V
	TA = Tlow to Thigh		4.85	±	5.20
Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C)		Regline	±	0.03	0.078	%/V
Input Bias Current (VFB = VFB(th) + 0.15 V)		IIB	±	0.15	1.0	μA
Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)		PSRR	60	80	±	dB
Output Voltage Swing High State (ISource = 75 μA, VFB = 4.5 V)		VOH	4.2	4.9	±	V
Low State (ISink = 0.4 mA, VFB = 5.5 V)		VOL	±	1.6	1.9
PWM COMPARATOR
Duty Cycle (VCC = 20 V)	Maximum (VFB = 0 V)	DC(max)	92	95	100	%
	Minimum (VComp = 1.9 V)	DC(min)	0	0	0
SWITCH OUTPUT
Output Voltage Source Saturation (VCC = 7.5 V, ISource = 5.0 A)		Vsat	±	(VCC ±1.5)	(VCC ±1.8)	V
Off±State Leakage (VCC = 40 V, Pin 2 = Gnd)		Isw(off)	±	0	100	μA
Current Limit Threshold (VCC = 7.5 V)		Ipk(switch)	5.5	6.5	8.0	A
Switching Times (VCC = 40 V, Ipk = 5.0 A, L = 225 μH, TA = +25°C)						ns
Output Voltage Rise Time		tr	±	100	200
Output Voltage Fall Time		tf	±	50	100
UNDERVOLTAGE LOCKOUT
Startup Threshold (VCC Increasing, TA = +25°C)		Vth(UVLO)	5.5	5.9	6.3	V
Hysteresis (VCC Decreasing, TA = +25°C)		VH(UVLO)	0.6	0.9	1.2	V
TOTAL DEVICE
Power Supply Current (TA = +25°C )		ICC				μA
Standby (VCC = 12 V, VComp < 0.15 V)			±	36	100
Operating (VCC = 40 V, Pin 1 = Gnd for maximum duty cycle)			±	40	60	mA
NOTES: 1. Maximum package power dissipation limits must be observed to prevent thermal shutdown activation.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. Tlow = 0°C for MC34167	Thigh = + 70°C for MC34167
= ± 40°C for MC33167	= + 85°C for MC33167

2	MOTOROLA ANALOG IC DEVICE DATA

MC34167 MC33167

(V)			Figure 1. Voltage Feedback Input Threshold
					versus Temperature
THRESHOLD	5.17
	5.25
INPUT			VCC =	12 V			VFB(th)	Max = 5.15 V
	5.09
FEEDBACK							VFB(th) Typ = 5.05 V
	5.01
VOLTAGE,							VFB(th) Min = 4.95 V
	4.93
FB(th)
	± 55		± 25		0	25	50		75	100	125
V	4.85				TA, AMBIENT TEMPERATURE (°C)

Figure 3. Error Amp Open Loop Gain and

Phase versus Frequency

			Figure 2. Voltage Feedback Input Bias
					Current versus Temperature
(nA)	100
	80											VCC = 12 V
												VFB = VFB(th)
CURRENTBIAS
	60
, INPUT	40
	20
IB
I
	0
			± 25		0		25		50		75		100	125
	± 55

TA, AMBIENT TEMPERATURE (°C)

Figure 4. Error Amp Output Saturation

versus Sink Current

GAINVOLTAGELOOPOPEN, (dB)	100				VCC = 12 V		0		VOLTAGESATURATIONOUTPUT(V)	2.0
								(DEGREES)PHASEEXCESS		0.4				TA = +25°C
	80				VComp = 3.25 V		30
			Gain		RL = 100 k					1.6
					TA = +25°C
	60						60
										1.2
	40					Phase	90
										0.8
	20						120
														VCC = 12 V
														VFB = 5.5 V
VOL	0						150	φ,	,
									sat
A	± 20						180		V	0
		100	1.0 k	10 k	100 k	1.0 M					0.4	0.8	1.2	1.6	2.0
	10						10 M			0
			f, FREQUENCY (Hz)									ISink, OUTPUT SINK CURRENT (mA)

Figure 5. Oscillator Frequency Change

Figure 6. Switch Output Duty Cycle

f OSC, OSCILLATOR FREQUENCY CHANGE (%)

versus Temperature

versus Compensation Voltage

4.0

VCC = 12 V

0

± 4.0

± 8.0

± 12

± 55 ± 25 0 25 50 75 100 125

(%)	100
CYCLE	80	VCC = 12 V
		TA = +25°C
DUTY	60
OUTPUT	40
DC, SWITCH	20
	0
		2.0	2.5	3.0	3.5	4.0	4.5
	1.5

TA, AMBIENT TEMPERATURE (°C)

VComp, COMPENSATION VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA	3

MC34167 MC33167

Figure 7. Switch Output Source Saturation

(V)				versus Source Current
SATURATION	0					TA = +25°C
					VCC
SOURCE	± 0.5
	±1.0
OUTPUT	±1.5
	± 2.0
SWITCH,
	± 2.5
sat± 3.0
			2.0		4.0	6.0			8.0
V	0

ISource, SWITCH OUTPUT SOURCE CURRENT (A)

Figure 9. Switch Output Current Limit

Threshold versus Temperature

(A)	7.2
THRESHOLDLIMIT											VCC	= 12 V
											Pins	1, 2, 3 =		Gnd
	6.8
, CURRENT	6.4
	6.0
pk(switch)	5.6
I			± 25		0		25		50		75		100		125
	± 55

TA, AMBIENT TEMPERATURE (°C)

(V)				Figure 11. Undervoltage Lockout
	6.0			Thresholds versus Temperature
THRESHOLD									VCC Increasing
	6.5
									Startup	Threshold
LOCKOUT	5.5
UNDERVOLTAGE,									Turn±Off Threshold
	5.0								VCC Decreasing
th(UVLO)	4.5
	4.0
					TA,	AMBIENT		TEMPERATURE (°C)
	± 55		± 25		0		25		50		75	100		125
V

Figure 8. Negative Switch Output Voltage

versus Temperature

0

(V)

Gnd

± 0.2

VOLTAGE

VCC =

12 V

± 0.4

Pin 5 = 2.0 V

Pins 1, 3 = Gnd

OUTPUT

± 0.6

Pin 2 Driven Negative

Isw

= 100

μA

SWITCH,

± 0.8

Isw = 10 mA

sw

±1.0

V

±1.2

± 25

0

25

50

75

100

125

± 55

TA, AMBIENT TEMPERATURE (°C)

Figure 10. Standby Supply Current

versus Supply Voltage

	160
			Pin 4	= VCC
A)		Pins 1,		3, 5 = Gnd
	120		Pin 2	Open
(μ
			TA =	+25°C
CURRENT	80
,SUPPLY	40
CC
I
	0
		10				20		30		40
	0

VCC, SUPPLY VOLTAGE (V)

Figure 12. Operating Supply Current

versus Supply Voltage

	50
(mA)	40
CURRENT	30
SUPPLY	20			Pin 4 = VCC
				Pins 1, 3 = Gnd
,				Pins 2, 5 Open
CC	10
				TA = +25°C
I
	0	10	20	30	40
	0

VCC, SUPPLY VOLTAGE (V)

4	MOTOROLA ANALOG IC DEVICE DATA

		MC34167 MC33167
Figure 13. MC34167 Representative Block Diagram
						Vin
+			Current			4
			Sense
						Input Voltage/VCC
Oscillator						Cin
		S
CT						Switch
		Q
						Output
		R				2
Pulse Width				Undervoltage
		PWM Latch
Modulator				Lockout
		Thermal						L
		Shutdown		5.05 V
			+	Reference
					+	Voltage
				Error
		100 μA				Feedback
				Amp
						Input
						1	R2	VO
			120					CO
Gnd	3	Compensation	5	CF	RF

=					R1
	Sink Only
	Positive True Logic

Figure 14. Timing Diagram

4.1 V

Timing Capacitor CT

Compensation

2.3 V

ON

Switch Output

OFF

MOTOROLA ANALOG IC DEVICE DATA	5