MC34167 MC33167
MAXIMUM RATINGS
Rating
Power Supply Input Voltage
Switch Output Voltage Range
Voltage Feedback and Compensation Input
Voltage Range
Power Dissipation
Case 314A, 314B and 314D (TA = +25°C)
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 936A (D2PAK) (TA = +25°C)
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Operating Junction Temperature
Operating Ambient Temperature (Note 3)
MC34167
MC33167
Storage Temperature Range
Symbol
VCC
VO(switch)
VFB, VComp
Value
40
–2.0 to + Vin
–1.0 to + 7.0
Unit
V
V
V
PD
θ
JA
θ
JC
PD
θ
JA
θ
JC
TJ
TA
Internally Limited
65
5.0
Internally Limited
70
5.0
+150
0 to + 70
– 40 to + 85
W
°C/W
°C/W
W
°C/W
°C/W
°C
°C
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
OSCILLATOR
Frequency (VCC = 7.5 V to 40 V)
ERROR AMPLIFIER
Voltage Feedback Input Threshold
TA =+ 25°C
TA = Tlow to Thigh
VFB(th)
Regline
IIB
PSRR
VOH
VOL
DC(max)
DC(min)
Vsat
Isw(off)
Ipk(switch)
tr
tf
Vth(UVLO)
VH(UVLO)
ICC
–
–
36
40
100
60
4.95
4.85
–
–
60
4.2
–
5.05
–
0.03
0.15
80
4.9
1.6
5.15
5.20
0.078
1.0
–
–
1.9
V
%/V
µA
dB
V
TA = +25°C
TA = Tlow to Thigh
fOSC
65
62
72
–
79
81
kHz
Symbol
Min
Typ
Max
Unit
Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C)
Input Bias Current (VFB = VFB(th) + 0.15 V)
Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)
Output Voltage Swing
PWM COMPARATOR
Duty Cycle (VCC = 20 V)
SWITCH OUTPUT
Output Voltage Source Saturation (VCC = 7.5 V, ISource = 5.0 A)
Off–State Leakage (VCC = 40 V, Pin 2 = Gnd)
Current Limit Threshold (VCC = 7.5 V)
Switching Times (VCC = 40 V, Ipk = 5.0 A, L = 225
µH,
TA = +25°C)
Output Voltage Rise Time
Output Voltage Fall Time
UNDERVOLTAGE LOCKOUT
Startup Threshold (VCC Increasing, TA = +25°C)
Hysteresis (VCC Decreasing, TA = +25°C)
TOTAL DEVICE
Power Supply Current (TA = +25°C )
Standby (VCC = 12 V, VComp < 0.15 V)
Operating (VCC = 40 V, Pin 1 = Gnd for maximum duty cycle)
Maximum (VFB = 0 V)
Minimum (VComp = 1.9 V)
High State (ISource = 75
µA,
VFB = 4.5 V)
Low State (ISink = 0.4 mA, VFB = 5.5 V)
92
0
95
0
100
0
%
–
–
5.5
–
–
(VCC –1.5)
0
6.5
100
50
(VCC –1.8)
100
8.0
200
100
V
µA
A
ns
5.5
0.6
5.9
0.9
6.3
1.2
V
V
µA
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. T
low
= 0°C for MC34167
T
high
= + 70°C for MC34167
= – 40°C for MC33167
= + 85°C for MC33167
2
MOTOROLA ANALOG IC DEVICE DATA
ONSEMI [ ON SEMICONDUCTOR ]
