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MC34167_05 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. MC34167_05
Description  5.0 A, Step−Up/Down/Inverting Switching Regulators
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC34167, MC33167
http://onsemi.com
3
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 4, 5), unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (VCC = 7.5 V to 40 V)
TA = +25°C
TA = Tlow to Thigh
fOSC
65
62
72
79
81
kHz
ERROR AMPLIFIER
Voltage Feedback Input Threshold
TA =+ 25°C
TA = Tlow to Thigh
VFB(th)
4.95
4.85
5.05
5.15
5.20
V
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
mA
Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz)
PSRR
60
80
dB
Output Voltage Swing
High State (ISource = 75 mA, VFB = 4.5 V)
Low State (ISink = 0.4 mA, VFB = 5.5 V)
VOH
VOL
4.2
4.9
1.6
1.9
V
PWM COMPARATOR
Duty Cycle (VCC = 20 V)
Maximum (VFB = 0 V)
Minimum (VComp = 1.9 V)
DC(max)
DC(min)
92
0
95
0
100
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
mA
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 mH, TA = +25°C)
Output Voltage Rise Time
Output Voltage Fall Time
tr
tf
100
50
200
100
ns
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 )
Standby (VCC = 12 V, VComp < 0.15 V)
Operating (VCC = 40 V, Pin 1 = GND for maximum duty cycle)
ICC
36
40
100
60
mA
mA
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
5. Tlow =0°C for MC34167
Thigh = + 70°C for MC34167
=− 40
°C for MC33167
= + 85
°C for MC33167




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