MIC38HC42 データシートの表示（PDF） - Micrel
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MIC38HC42 Datasheet PDF : 8 Pages
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MIC38HC42/3/4/5
Micrel, Inc.
Parameter
Test Conditions
Min Typ Max Units
Current Sense
Gain
Notes 2, 3
2.85 3.0 3.15 V/V
MaximumThreshold
PSRR
Input Bias Current
VCOMP = 5V, Note 2
12 ≤ VDD ≤ 18V, Note 2
0.9
1
1.1
V
70
dB
–0.1 –2
µA
Delay to Output
120 250
ns
Output
RDS(ON) ‘HC’ High
RDS(ON) ‘HC’ Low
Rise Time
Fall Time
Undervoltage Lockout
ISOURCE = 200mA
ISINK = 200mA
TA = 25°C, CL = 1nF
TA = 25°C, CL = 1nF
10
Ω
5.5
Ω
20
50
ns
15
40
ns
Start Threshold
MIC38HC42/4
13.5 14.5 15.5
V
MIC38HC43/5
7.8
8.4
9.0
V
Minimum Operating Voltage
MIC38HC42/4
8
9
10
V
MIC38HC43/5
7.0
7.6
8.2
V
Pulse Width Modulator
Maximum Duty Cycle
MIC38HC42/3
94
96
%
MIC38HC44/5
46
50
%
Minimum Duty Cycle
0
%
Total Standby Current
Start-Up Current
VDD = 13V, 38HC42/44
VDD = 7.5V, 38HC43/45
50
200
µA
Operating Supply Current
VFB = VISNS = 0V
4.0
6.0
mA
Zener Voltage (VDD)
IDD = 25mA, Note 6
Note 1: These parameters, although guaranteed, are not 100% tested in production.
Note 2: Parameter measured at trip point of latch with VEA = 0.
Note 3: Gain defined as:
30
37
V
A=
∆ VPIN1 ;
VTH (ISNS )
0
≤
VTH (ISNS )
≤
0.8V
Note 4: Adjust VDD above the start threshold before setting at 15V.
Note 5: Output frequency equals oscillator frequency for the MIC38HC42 and MIC38HC43. Output frequency for the MIC38HC44, and
MIC38HC45 equals one half the oscillator frequency.
Note 6: On 8-pin version, 20V is maximum input on pin 7, as this is also the supply pin for the output stage. On 14-pin version, 40V is
maximum for pin 12 and 20V maximum for pin 11.
April 2005
5
M9999-042205
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