MIC38C42A/43A/44A/45A
Parameter
Current Sense
Gain
MaximumThreshold
PSRR
Input Bias Current
Delay to Output
Output
R
DS(ON)
High
R
DS(ON)
Low
Rise Time
Fall Time
Undervoltage Lockout
Start Threshold
MIC38C42A/4A
MIC38C43A/5A
Minimum Operating Voltage
MIC38C42A/4A
MIC38C43A/5A
Pulse Width Modulator
Maximum Duty Cycle
MIC38C42A/3A
MIC38C44A/5A
Minimum Duty Cycle
Total Standby Current
Start-Up Current
V
DD
= 13V for MIC38C42A/44A
V
DD
= 7.5V for MIC38C43A/45A
V
FB
= V
ISNS
= 0V
100
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
20
11
40
30
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
80
60
ns
ns
15.5
9.0
10
8.2
V
V
V
V
%
%
0
%
230
µA
mA
Operating Supply Current
4.0
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 MIC38C42 and MIC38C43. Output frequency for the MIC38C44A, and
MIC38C45A equals one half the oscillator frequency.
Note 6:
Specification for packaged product only.
April 2005
5
M9999-042205
MICREL [ MICREL SEMICONDUCTOR ]
