MIC38HC42/3/4/5
Parameter
Current Sense
Gain
MaximumThreshold
PSRR
Input Bias Current
Delay to Output
Output
R
DS(ON)
‘HC’ High
R
DS(ON)
‘HC’ Low
Rise Time
Fall Time
Undervoltage Lockout
Start Threshold
MIC38HC42/4
MIC38HC43/5
Minimum Operating Voltage
MIC38HC42/4
MIC38HC43/5
Pulse Width Modulator
Maximum Duty Cycle
MIC38HC42/3
MIC38HC44/5
Minimum Duty Cycle
Total Standby Current
Start-Up Current
V
DD
= 13V, 38HC42/44
V
DD
= 7.5V, 38HC43/45
V
FB
= V
ISNS
= 0V
I
DD
= 25mA,
Note 6
30
50
94
46
96
50
13.5
7.8
8
7.0
14.5
8.4
9
7.6
I
SOURCE
= 200mA
I
SINK
= 200mA
T
A
= 25°C, C
L
= 1nF
T
A
= 25°C, C
L
= 1nF
10
5.5
20
15
Notes 2, 3
V
COMP
= 5V,
Note 2
12
≤
V
DD
≤
18V,
Note 2
2.85
0.9
3.0
1
70
–0.1
120
Test Conditions
Min
Typ
Micrel, Inc.
Max
Units
3.15
1.1
V/V
V
dB
–2
250
µA
ns
Ω
Ω
50
40
ns
ns
15.5
9.0
10
8.2
V
V
V
V
%
%
0
%
200
µA
mA
V
Operating Supply Current
Zener Voltage (V
DD
)
4.0
37
6.0
Note 1:
These parameters, although guaranteed, are not 100% tested in production.
Note 2:
Parameter measured at trip point of latch with V
EA
= 0.
Note 3:
Gain defined as:
A =
∆
V
PIN1
;
0
≤
V
TH
(I
SNS
)
≤
0.8V
V
TH
(I
SNS
)
Note 4:
Adjust V
DD
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
MICREL [ MICREL SEMICONDUCTOR ]
