MIC38C42A Просмотр технического описания (PDF) - Micrel
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MIC38C42A Datasheet PDF : 9 Pages
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MIC38C42A/43A/44A/45A
Absolute Maximum Ratings
Supply Voltage (VDD) .................................................... 20V
Switch Supply Voltage (VD) .......................................... 20V
Current Sense Voltage (VISNS) ..................... –0.3V to 5.5V
Feedback Voltage (VFB) ................................ –0.3V to 5.5V
Output Current (IOUT) ................................................... 0.5A
Storage Temperature (TA) ....................... –65°C to +150°C
Micrel, Inc.
Operating Ratings
Junction Temperature (TJ) ........................................ 150°C
Package Thermal Resistance
8-Pin MM8™ (θJA) ............................................. 250°C/W
8-Pin SOIC (θJA) ............................................... 170°C/W
Electrical Characteristics(Note 6)
VDD = 15V, Note 4; RT = 11.0k; CT = 3.3nF; –40°C ≤ TA ≤ 85°C; unless noted
Parameter
Test Conditions
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temp. Stability
TA = 25°C, IO = 1mA
12V ≤ VDD ≤ 18V, IO = 5µA
1 ≤ IO ≤ 20mA
Note 1
Total Output Variation
Line, Load, Temp., Note 1
Output Noise Voltage
Long Term Stability
Output Short Circuit
10Hz ≤ f ≤ 10kHz, TA = 25°C, Note 1
TA = 125°C, 1000 hrs., Note 1
Oscillator Section
Initial Accuracy
Voltage Stability
Temp. Stability
Clock Ramp
Reset Current
TA = 25°C, Note 5
12 ≤ VDD ≤ 18V
TMIN ≤ TA ≤ TMAX, Note 1
TA = 25°C, VRT/CT = 2V, Note 1
Amplitude
Error Amp Section
VRT/CT peak to peak
Input Voltage
Input Bias Current
AVOL
Unity Gain Bandwidth
VCOMP = 2.5V
VFB = 5.0V
2 ≤ VO ≤ 4V
Note 1
PSRR
Output Sink Current
Output Source Current
VOUT High
VOUT Low
12 ≤ VDD ≤ 18V
VFB = 2.7V, VCOMP = 1.1V
VFB = 2.3V, VCOMP = 5V
VFB = 2.3V, RL = 15k to ground
VFB = 2.7V, RL = 15k to VREF
M9999-042205
4
Min Typ Max Units
4.90 5.00 5.10
V
2
20
mV
1
25
mV
0.2
mV/°C
4.82
5.18
V
50
µV
5
25
mV
–30 –80 –180 mA
47
53
59 kHz
0.2
1.0
%
0.04
%/°C
7.7
8.4
9.0
mA
1.9
Vp-p
2.4 2.50 2.58
V
–0.1 –2
µA
65
90
dB
0.7
1.0
MHz
60
dB
2
14
mA
–0.3 –1
mA
5
6.8
V
0.1
1.1
V
April 2005
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