(Hong Kong)
Product Summary
The LM2594MX-3.3 is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. The LM2594MX-3.3 is available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version, and is packaged in a 8-lead DIP and a 8-lead surface mount package. The LM2594MX-3.3 operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. The applications of LM2594MX-3.3 are: (1)Simple high-efficiency step-dow(buck) regulator; (2)Efficient pre-regulator for linear regulators; (3)On-card switching regulators; (4)Positive to Negative convertor.
Parametrics
LM2594MX-3.3 absolute maximum ratings: (1)Maximum Supply Voltage: 45V; (2)ON /OFF Pin Input Voltage: -0.3 ≤ V ≤ +25V; (3)Feedback Pin Voltage: -0.3 ≤ V ≤+25V; (4)Output Voltage to Ground: -1V; (5)Power Dissipation: Internally limited; (6)Storage Temperature Range: -65℃ to +150℃; (7)ESD Susceptibility: 2 kV; (8)Maximum Junction Temperature: +150℃.
Features
LM2594MX-3.3 features: (1)3.3V, 5V, 12V, and adjustable output versions; (2)Adjustable version output voltage range, 1.2V to 37V (57V for the HV version)±4% max over line and load conditions; (3)Available 8-pin surface mount and DIP-8 package; (4)Guaranteed 0.5A output current; (5)Input voltage range up to 60V; (6)Requires only 4 external components; (7)150 kHz fixed frequency internal oscillator; (8)TTL Shutdown capability; (9)Low power standby mode, IQ typically 85 μA; (10)High Efficiency; (11)Uses readily available standard inductors; (12)Thermal shutdown and current limit protection.
Diagrams
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 LM2594MX-3.3 |
National Semiconductor (TI) |
Switching Converters, Regulators & Controllers |
Data Sheet |
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LM2594MX-3.3/NOPB |
National Semiconductor (TI) |
Switching Converters, Regulators & Controllers |
Data Sheet |
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