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MIC38HC43YN Datasheet(PDF) 5 Page - Micrel Semiconductor

Part # MIC38HC43YN
Description  BiCMOS 1A Current-Mode PWM Controllers
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC38HC43YN Datasheet(HTML) 5 Page - Micrel Semiconductor

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MIC38HC42/3/4/5
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) ‘HC’ High
I
SOURCE = 200mA
10
R
DS(ON) ‘HC’ Low
I
SINK = 200mA
5.5
Rise Time
T
A = 25°C, CL = 1nF
20
50
ns
Fall Time
T
A = 25°C, CL = 1nF
15
40
ns
Undervoltage Lockout
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
V
DD = 13V, 38HC42/44
50
200
µA
V
DD = 7.5V, 38HC43/45
Operating Supply Current
V
FB = VISNS = 0V
4.0
6.0
mA
Zener Voltage (V
DD)IDD = 25mA, Note 6
30
37
V
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 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.


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