SG1843L-DESC

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Microchip Technology

CURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 8V UVLO - 55°C TO125°C

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SG1843L-DESC

Active

Microchip Technology

CURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 8V UVLO - 55°C TO125°C

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Description Specifications Series Pricing CAD Documents

Description

General part information

SG1843 Series

The SG1842/43 family of control IC's provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components.

Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch. The band-gap reference is trimmed to ±1% over temperature.

Oscillator discharge current is trimmed to less than ±10%. The SG1842/43 has under-voltage lockout, current limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET. The output is low in the off state to provide direct interface to an N-channel device. The SG1842/43 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2842/43 is specified for the industrial range of -25°C to 85°C, and the SG3842/43 is designed for the commercial range of 0°C to 70°C.

Technical Specifications

Parameters and characteristics for this part

Specification	SG1843L-DESC

Clock Sync	No
Duty Cycle (Max)	95 %
Frequency - Switching (Max)	500 kHz
Frequency - Switching (Min)	100 Hz
Function	Step-Down
Grade	Military
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-55 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	20-CLCC
Package Length	8.89 mm
Package Name	20-CLCC
Package Width	8.89 mm
Qualification	MIL-STD-883
Synchronous Rectifier	No
Topology	Buck
Voltage - Supply (Vcc/Vdd)	30 V

SG1843 Series

Part	Clock Sync	Topology	Package Width	Package Name	Package Length	Function	Mounting Type	Voltage - Supply (Vcc/Vdd)	Number of Outputs	Grade	Synchronous Rectifier	Output Configuration	Frequency - Switching (Max)	Frequency - Switching (Min)	Operating Temperature (Max)	Operating Temperature (Min)	Duty Cycle (Max)	Package / Case	Output Phases	Output Type	Qualification	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum
Microchip Technology SG1843L	No	Buck	8.89 mm	20-CLCC	8.89 mm	Step-Down	Surface Mount	30 V	1	Military	No	Positive	500 kHz	100 Hz	125 °C	-55 °C	95 %	20-CLCC	1	Transistor Driver	MIL-STD-883
Microchip Technology SG1843Y-DESC	No	Buck	7.62 mm	8-CDIP 8-CERDIP	0.3 in	Step-Down	Through Hole		1	Military	No	Positive	500 kHz	1 Hz	125 °C	-55 °C	95 %		1	Transistor Driver	MIL-STD-883B	30 V	7.6 V
Microchip Technology SG1843L-DESC	No	Buck	8.89 mm	20-CLCC	8.89 mm	Step-Down	Surface Mount	30 V	1	Military	No	Positive	500 kHz	100 Hz	125 °C	-55 °C	95 %	20-CLCC	1	Transistor Driver	MIL-STD-883
Microchip Technology SG1843L-883B	No	Buck	8.89 mm	20-CLCC	8.89 mm	Step-Down	Surface Mount	30 V	1	Military	No	Positive	500 kHz	100 Hz	125 °C	-55 °C	95 %	20-CLCC	1	Transistor Driver	MIL-STD-883
Microchip Technology SG1843	No	Buck				Step-Down		30 V	1	Military	No	Positive	500 kHz	100 Hz	125 °C	-55 °C	95 %		1	Transistor Driver	MIL-STD-883
Microchip Technology SG1843Y-883B	No	Buck	7.62 mm	8-CDIP 8-CERDIP	0.3 in	Step-Down	Through Hole		1	Military	No	Positive	500 kHz	1 Hz	125 °C	-55 °C	95 %		1	Transistor Driver	MIL-STD-883B	30 V	7.6 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Garden Grove AS9100D (SG Products)

TN-206:Voltage-Mode, Current-Mode (and Hysteretic Control)

SG1524 - Galvanically Isolated Gate Driver Design

SG1842 SG1843 Datasheet

SG1843L-DESC | Datasheet