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MIC38HC42 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC38HC42
Description  BiCMOS 1A Current-Mode PWM Controllers
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC38HC42 Datasheet(HTML) 3 Page - Micrel Semiconductor

  MIC38HC42 Datasheet HTML 1Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 2Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 3Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 4Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 5Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 6Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 7Page - Micrel Semiconductor MIC38HC42 Datasheet HTML 8Page - Micrel Semiconductor  
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MIC38HC42/3/4/5
Micrel, Inc.
April 2005
3
M9999-042205
Pin Description
Pin Number
Pin Number
Pin Name
Pin Function
N, M, MM
-1BN, -1BM
11
COMP
Compensation: Connect external compensation network to modify the error
amplifier output.
2NC
Not internally connected.
23
FB
Feedback (Input): Error amplifier input. Feedback is 2.5V at desired output
voltage.
4NC
Not internally connected.
35
ISNS
Current Sense (Input): Current sense comparator input. Connect to current
sensing resistor or current transformer.
6NC
Not internally connected.
47
RT/CT
Timing Resistor/Timing Capacitor: Connect external RC network to select
switching frequency.
5
GND
Ground: Combined analog and power ground.
8
PGND
Power Ground: N-channel driver transistor ground.
9
AGND
Analog Ground: Controller circuitry ground.
610
OUT
Power Output: Totem-pole output.
11
VD
Power Supply (Input): P-channel driver transistor supply input. Return to
power ground (PGND).
712
VDD
Analog Supply (Input): Controller circuitry supply input. Return to analog
ground (AGND).
13
NC
Not internally connected.
814
VREF
5V Reference (Output): Connect external RC network.
1
2
3
4
8
7
6
5
COMP
FB
ISNS
RT/CT
VREF
VDD
OUT
GND
MIC38HC4x
2
NC
NC
13
3
FB
VDD
12
4
NC
VD
11
5
ISNS
OUT
10
6
NC
AGND
9
7
RT/CT
PGND
8
1
COMP
VREF
14
MIC38HC4x-1
8-Pin DIP (N)
8-Lead SOIC (M)
14-Pin DIP (-1BN)
14-Lead SOIC (-1BM)
Pin Configuration


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