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MIC38C42 Datasheet(PDF) 5 Page - Micrel Semiconductor

Part No. MIC38C42
Description  BiCMOS Current-Mode PWM Controllers
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC38C42 Datasheet(HTML) 5 Page - Micrel Semiconductor

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MIC38C42/3/4/5
Micrel, Inc.
July 2005
5
M9999-072805
Parameter
Test Conditions
Min
Typ
Max
Units
Current Sense
Gain
Notes 2, 3
2.85
3.0
3.15
V/V
MaximumThreshold
VCOMP = 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
RDS(ON) High
ISOURCE = 200mA
20
Ω
RDS(ON) Low
ISINK = 200mA
11
Ω
Rise Time
TA = 25°C, CL = 1nF
40
80
ns
Fall Time
TA = 25°C, CL = 1nF
30
60
ns
Undervoltage Lockout
Start Threshold
MIC38C42/4
13.5
14.5
15.5
V
MIC38C43/5
7.8
8.4
9.0
V
Minimum Operating Voltage
MIC38C42/4
8
9
10
V
MIC38C43/5
7.0
7.6
8.2
V
Pulse Width Modulator
Maximum Duty Cycle
MIC38C42/3
94
96
%
MIC38C44/5
46
50
%
Minimum Duty Cycle
0
%
Total Standby Current
Start-Up Current
VDD = 13V for MIC38C42/44
50
200
µA
VDD = 7.5V for MIC38C43/45
Operating Supply Current
VFB = VISNS = 0V
4.0
6.0
mA
Zener Voltage (VDD)
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 VEA = 0.
Note 3: Gain defined as:
∆VPIN1
A =
; 0 ≤ VTH (ISNS) ≤ 0.8V
VTH (ISNS)
Note 4: Adjust VDD above the start threshold before setting at 15V.
Note 5: Output frequency equals oscillator frequency for the MIC38C42 and MIC38C43. Output frequency for the MIC38C44, and
MIC38C45 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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