Specification	MIC38HC43-1YN

Clock Sync	False
Control Features	Frequency Control
Duty Cycle (Max) [Max]	96 %
Function	Step-Up, Step-Up/Step-Down, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	14-DIP
Package / Case [x]	0.3 "
Package / Case [y]	7.62 mm
Supplier Device Package	14-DIP
Synchronous Rectifier	True
Topology	Boost, Forward Converter, Flyback, Buck
Voltage - Supply (Vcc/Vdd) [Max]	20 V
Voltage - Supply (Vcc/Vdd) [Min]	7.6 V

MIC38HC43 Series

Part	Output Type	Package / Case	Package / Case [y]	Package / Case [x]	Output Configuration	Control Features	Number of Outputs	Topology	Duty Cycle (Max) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Mounting Type	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Function	Output Phases	Package / Case	Package / Case
Microchip Technology MIC38HC43YM-TR	Transistor Driver	8-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount	8-SOIC	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43-1YN	Transistor Driver	14-DIP	7.62 mm	0.3 "	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount	14-DIP	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43BN	Transistor Driver	8-DIP			Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Through Hole	8-DIP	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1	0.3 in	7.62 mm
Microchip Technology MIC38HC43BM-TR	Transistor Driver	8-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount	8-SOIC	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43-1YM	Transistor Driver	14-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount		85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43YM	Transistor Driver	8-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount	8-SOIC	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43BM	Transistor Driver	8-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount	8-SOIC	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43-1BM	Transistor Driver	14-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount		85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43-1BM-TR	Transistor Driver	14-SOIC	3.9 mm	0.154 in	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount		85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1
Microchip Technology MIC38HC43-1BN	Transistor Driver	14-DIP	7.62 mm	0.3 "	Isolation Capable Positive	Frequency Control	1	Boost Buck Flyback Forward Converter	96 %	7.6 V	20 V	Surface Mount Through Hole	14-DIP	85 °C	-40 °C	Step-Down Step-Up Step-Up/Step-Down	1

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 2.37
		25	$ 1.96
		100	$ 1.78
Microchip Direct	TUBE	1	$ 2.37
		25	$ 1.96
		100	$ 1.78
		1000	$ 1.73
		5000	$ 1.71
		10000	$ 1.69
Newark	Each	100	$ 0.82

Description

General part information

MIC38HC43 Series

The MIC38HC4x family are fixed frequency current-mode PWM controllers with 1A drive current capability. BiCMOS devices are pin-compatible with 384x bipolar devices. Their high output drive, with fast rise and fall times, combined with low startup current make it an ideal PWM controller where high efficiency is required.

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 UC384x 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 efficiency, especially at lower supply voltages. The MIC38HC4x also features a trimmed oscillator discharge current and bandgap reference.

Documents

Technical documentation and resources

MIC38HC42/3/4/5 - BiCMOS 1A Current-Mode PWM Controllers

Data Sheets

Product Change Notice EN

Datasheet