MIC38C44BM TR Micrel Inc, MIC38C44BM TR Datasheet
MIC38C44BM TR
Specifications of MIC38C44BM TR
MIC38C44BMTR
Related parts for MIC38C44BM TR
MIC38C44BM TR Summary of contents
Page 1
MIC38C42/3/4/5 General Description The MIC38C4x are fixed frequency, high performance, cur- rent-mode PWM controllers. Micrel’s BiCMOS devices are pin compatible with 384x bipolar devices but feature several improvements. Undervoltage lockout circuitry allows the ’42 and ’44 versions to start up ...
Page 2
MIC38C42/3/4/5 Ordering Information Part Number* Standard Pb-Free MIC38C42BN MIC38C42YN MIC38C43BN MIC38C43YN MIC38C44BN MIC38C44YN MIC38C45BN MIC38C45YN MIC38C42-1BN Contact Factory MIC38C43-1BN Contact Factory MIC38C44-1BN MIC38C44-1YN MIC38C45-1BN Contact Factory MIC38C42BM MIC38C42YM MIC38C43BM MIC38C43YM MIC38C44BM MIC38C44YM MIC38C45BM MIC38C45YM MIC38C42BMM MIC38C42YMM MIC38C43BMM MIC38C43YMM MIC38C44BMM MIC38C44YMM ...
Page 3
MIC38C42/3/4/5 Pin Configuration MIC38C4x 8-Pin DIP (N) 8-Pin SOIC (M) 8-Pin MSOP (MM) Pin Description Pin Number Pin Number Pin Name ...
Page 4
MIC38C42/3/4/5 Absolute Maximum Ratings Zener Current (V ) ................................................... 30mA DD Operation at ≥18V may require special precautions (Note 6). Supply Voltage (V ), Note 6 ........................................ 20V DD Switch Supply Voltage (V ) ........................................... 20V D Current Sense Voltage ...
Page 5
MIC38C42/3/4/5 Parameter Test Conditions Current Sense Gain Notes 2, 3 MaximumThreshold V COMP PSRR 12 ≤ V Input Bias Current Delay to Output Output R High I DS(ON) SOURCE R Low I DS(ON) SINK Rise Time T A Fall Time ...
Page 6
MIC38C42/3/4/5 Typical Characteristics Oscillator Frequency Configuration 100 200pF 470pF 1nF 10 1.8nF 4.7nF 10nF V = 15V 1x10 1x10 5x10 OSCILLATOR FREQUENCY (Hz) Current Sense Amplifier vs. Error Amplifier Output 1.2 1.0 125°C 0.8 0.6 ...
Page 7
MIC38C42/3/4/5 Application Information Familiarity with 384x converter designs is assumed. The MIC38C4x has been designed to be compatible with 384xA series controllers. MIC38C4x Advantages Start-up Current Start-up current has been reduced to an ultra-low 50µA (typi- cal) permitting higher-valued, lower-wattage, ...
Page 8
MIC38C42/3/4/5 Test Conditions Line Regulation V = 26V to 80V Load Regulation V = 48V 0. Efficiency V = 48V Output Ripple V = 48V, I ...
Page 9
MIC38C42/3/4/5 Package Information 0.018 (0.57) .235 (5.969) .215 (5.461) .160 MAX (4.064) .160 (4.064) .100 (2.540) September 2007 PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 ...
Page 10
MIC38C42/3/4/5 M9999-091107 8-Pin SOIC (M) 8-Pin MSOP (MM) 10 Micrel, Inc. September 2007 ...
Page 11
... MIC38C42/3/4/5 MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...