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Datasheet Microchip MIC38C42-1YM-TR

MIC38C42A/43A/44A/45A recommended for new designs

Datasheets

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  MIC38C42/3/4/5 - BiCMOS Current-Mode PWM Controllers
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  MIC38C42/3/4/5 Micrel, Inc. MIC38C42/3/4/5
  BiCMOS Current-Mode PWM Controllers General Description Features The MIC38C4x are �xed frequency, high performance, current-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 at 14.5V and operate down to 9V, and the ’43 and
  ’45 versions start at 8.4V with operation down to 7.6V. All
  versions operate up to 20V.
  When compared to bipolar 384x devices operating from a
  15V supply, start-up current has been reduced to 50µA typical
  and operating current has been reduced to 4.0 mA typical.
  Decreased output rise and fall times drive larger MOSFETs,
  and rail-to-rail output capability increases ef�ciency, especially at lower supply voltages. The MIC38C4x also features
  a trimmed oscillator discharge current and bandgap reference.
  The MIC38C4x denotes 8-pin plastic DIP, SOIC, and MSOP
  packages. MIC384Cx-1 denotes 14-pin plastic DIP and
  SOIC packages. 8-pin devices feature small size, while 14pin devices separate the analog and power connections for
  improved perfomance and power dissipation. Fast 40ns output rise and 30ns output fall times –40°C to +85°C temperature range
  meets UC284x speci�cations High-performance, low-power BiCMOS Process Ultralow start-up current (50µA typical) Low operating current (4mA typical) CMOS outputs with rail-to-rail swing ≥ 500kHz current-mode operation Trimmed 5V bandgap reference Pin-for-pin compatible with UC3842/3843/3844/3845(A) Trimmed oscillator discharge current UVLO with hysteresis Low cross-conduction currents Applications Current-mode, off-line, switched-mode power supplies
  Current-mode, dc-to-dc converters.
  Step-down “buck� regulators
  Step-up “boost� regulators
  Flyback, isolated regulators ...

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MIC38C43 MIC38C44 MIC38C45

Moldel Line

• MIC38C42-1YM MIC38C42-1YM-TR MIC38C42AYM MIC38C42AYM-TR MIC38C42AYMM MIC38C42AYMM-TR MIC38C42YM MIC38C42YM-TR MIC38C42YMM MIC38C42YMM-TR MIC38C42YN

Manufacturer's Classification

• Power Management > PWM Controllers > Flyback/Fwd/Push-Pull Products

Other Names:

MIC38C421YMTR, MIC38C42 1YM TR

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