The SG1843L is a current mode PWM controller designed for off-line fixed-frequency switching power supplies. It features a low start-up current of less than 1mA and includes automatic feed-forward compensation, pulse-by-pulse current limiting, and under-voltage lockout. The device operates at a frequency of 500kHz and is optimized for driving N-channel MOSFETs with a high-current totem-pole output capable of 1A peak. The SG1843L is specified for a military temperature range of -55¬8C to 125¬8C, making it suitable for demanding applications. Its internal bandgap reference is trimmed to ¬±1% over temperature, ensuring stable performance. This controller is ideal for engineers looking for a reliable solution in power supply design with enhanced load response characteristics and built-in protection features.
Win Source Part Number: 1250177-SG1843L
Category: Integrated Circuits (ICs)>PMIC - Voltage Regulators - DC DC Switching Controllers
Series: Military, MIL-STD-883
Package: Tray
Standard Package: 50
Mounting: SMD (SMT)
Output Type: Transistor Driver
Function: Step-Down
Topology: Buck
Frequency - Switching: 100Hz ~ 500kHz
Number of Outputs: 1
Output Configuration: Positive
Synchronous Rectifier: No
Output Phases: 1
Duty Cycle (Max): 95%
Clock Sync: No
Package / Case: 20-CLCC
Supplier Device Package: 20-CLCC (8.89x8.89)
Temperature Range - Operating: -55°C ~ 125°C (TA)
Supply Voltage - Operating: 30V
ECCN: EAR99
Fake Threat In the Open Market: 50 pct.
HTSUS: 8542.39.0001
Mfr: Microchip Technology
Other Names: 150-SG1843L
Base Product Number: SG1843
Buck Regulator Positive Output Step-Down DC-DC Controller IC 20-CLCC (8.89x8.89)
CURRENT MODE PWMS, HIGH-RELIABIL
Buck Regulator Positive Output Step-Down DC-DC Controller IC 20-CLCC (8.89x8.89)
| Win Source Electronics | DigiKey | Lingto Electronic Limited | Quarktwin Technology Ltd. | |
|---|---|---|---|---|
| Product Category | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators |
| Product Number | 1250177-SG1843L | 150-SG1843L-ND | SG1843L | SG1843L |
| Product Name | Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Controllers | DC DC Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers | DC DC Switching Controllers |
| Configuration / Function | Buck | Buck | ||
| Output Voltage Type | Transistor Driver | Fixed; Transistor Driver | ||
| Package Type | Other; Tray | Other; 20-CLCC | Other; 20-CLCC | |
| Special Features | Multiple Outputs; Synchronous Rectification | |||
| fsw | 0.1000 to 500 kHz | 0.1000 to 500 kHz | 0.1000 to 500 kHz | 0.1000 to 500 kHz |
