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MIC38C42A Datasheet(PDF) 5 Page - Micrel Semiconductor

Part No. MIC38C42A
Description  BiCMOS Current-Mode PWM Controllers
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC38C42A Datasheet(HTML) 5 Page - Micrel Semiconductor

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MIC38C42A/43A/44A/45A
Micrel, Inc.
April 2005
5
M9999-042205
Parameter
Test Conditions
Min
Typ
Max
Units
Current Sense
Gain
Notes 2, 3
2.85
3.0
3.15
V/V
MaximumThreshold
V
COMP = 5V, Note 2
0.9
1
1.1
V
PSRR
12 ≤ VDD ≤ 18V, Note 2
70
dB
Input Bias Current
–0.1
–2
µA
Delay to Output
120
250
ns
Output
R
DS(ON) High
I
SOURCE = 200mA
20
R
DS(ON) Low
I
SINK = 200mA
11
Rise Time
T
A = 25°C, CL = 1nF
40
80
ns
Fall Time
T
A = 25°C, CL = 1nF
30
60
ns
Undervoltage Lockout
Start Threshold
MIC38C42A/4A
13.5
14.5
15.5
V
MIC38C43A/5A
7.8
8.4
9.0
V
Minimum Operating Voltage
MIC38C42A/4A
8
9
10
V
MIC38C43A/5A
7.0
7.6
8.2
V
Pulse Width Modulator
Maximum Duty Cycle
MIC38C42A/3A
94
96
%
MIC38C44A/5A
46
50
%
Minimum Duty Cycle
0%
Total Standby Current
Start-Up Current
V
DD = 13V for MIC38C42A/44A
100
230
µA
V
DD = 7.5V for MIC38C43A/45A
Operating Supply Current
V
FB = VISNS = 0V
4.0
6.0
mA
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
V
(I
)
0
V
(I
)
0.8V
PIN1
TH
SNS
TH
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.


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