MC34025, MC33025
ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 kW, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values
TA is the operating ambient temperature range that applies [Note 4], unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage
Input Bias Current
Input Offset Current
Open−Loop Voltage Gain (VO = 1.0 V to 4.0 V)
Gain Bandwidth Product (TJ = + 25°C)
Common Mode Rejection Ratio (VCM = 1.5 V to 5.5 V)
Power Supply Rejection Ratio (VCC = 10 V to 30 V)
Output Current,
Source (VO = 4.0 V)
Sink (VO = 1.0 V)
Output Voltage Swing,
High State (IO = − 0.5 mA)
Low State (IO = 1.0 mA)
Slew Rate
VIO
IIB
IIO
AVOL
GBW
CMRR
PSRR
ISource
ISink
VOH
VOL
SR
−
−
15
mV
−
0.6
3.0
mA
−
0.1
1.0
mA
60
95
−
dB
4.0
8.3
−
MHz
75
95
−
dB
85
110
−
dB
0.5
3.0
1.0
3.6
−
mA
−
4.5
4.75
5.0
V
0
0.4
1.0
6.0
12
−
V/ms
PWM COMPARATOR SECTION
Ramp Input Bias Current
Duty Cycle of Each Output,
Maximum
Minimum
Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V)
Propagation Delay (Ramp Input to Output, TJ = + 25°C)
SOFT−START SECTION
Charge Current (VSoft−Start = 0.5 V)
Discharge Current (VSoft−Start = 1.5 V)
CURRENT SENSE SECTION
Input Bias Current (Pin 9(12) = 0 V to 4.0 V)
Current Limit Comparator Threshold
Shutdown Comparator Threshold
Propagation Delay (Current Limit/Shutdown to Output, TJ = + 25°C)
OUTPUT SECTION
Output Voltage
Low State
High State
(ISink = 20 mA)
(ISink = 200 mA)
(ISource = 20 mA)
(ISource = 200 mA)
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 0.5 mA)
Output Leakage Current (VC = 20 V)
Output Voltage Rise Time (CL = 1.0 nF, TJ = + 25°C)
Output Voltage Fall Time (CL = 1.0 nF, TJ = + 25°C)
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (VCC Increasing)
UVLO Hysteresis Voltage (VCC Decreasing After Turn−On)
TOTAL DEVICE
Power Supply Current
Startup (VCC = 8.0 V)
Operating
IIB
DC(max)
DC(min)
Vth
tPLH(in/out)
Ichg
Idischg
IIB
Vth
Vth
tPLH(in/out)
VOL
VOH
VOL(UVLO)
IL
tr
tf
Vth(on)
VH
ICC
−
40
−
1.1
−
3.0
1.0
−
0.9
1.25
−
−
−
13
12
−
−
−
−
8.8
0.4
−
−
− 0.5
45
−
1.25
60
9.0
4.0
−
1.0
1.40
50
0.25
1.2
13.5
13
0.25
100
30
30
9.2
0.8
0.5
25
− 5.0
mA
−
%
0
1.4
V
100
ns
20
mA
−
mA
15
mA
1.10
V
1.55
80
ns
V
0.4
2.2
−
−
1.0
V
500
mA
60
ns
60
ns
9.6
V
1.2
V
mA
1.2
35
3. Maximum package power dissipation limits must be observed.
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for MC34025
Tlow = − 40°C for MC33025
Thigh = +70°C for MC34025
Thigh = +105°C for MC33025
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