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Part Number: MNLM1575
Description: The LM1575 regulator is a monolithic integrated circuit that provides all the active functions from a ...
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MNLM1575
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General Description
MNLM1575 General Description
The LM1575 regulator is a monolithic integrated circuit that provides all the active functions from a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation.
Requiring a minimum number of external components, this regulator is simple to use and includes internal frequency compensation and a fixed-frequency oscillator.
The LM1575 offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM1575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed +4% tolerance on output voltage within specified input voltage and output load conditions, and +10% on the oscillator frequency. External shutdown is included, featuring 50uA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
MNLM1575 Maximum Ratings
Maximum Supply Voltage
.................... 45V
ON/OFF Pin Input Voltage
.............. -0.3V <V< +Vin
Output Voltage to Ground
(Steady State)............... -1V
Power Dissipation.........(Note 2, 3)
Internally Limited
Storage Temperature Range
............-65 C < Ta < +150 C
Lead Temperature
(Soldering, 10 seconds)
METAL CAN................ 300 C
CERDIP .................. 260 C
CERAMIC SOIC ..............260 C
Maximum Junction Temperature....150 C
.................... 45V
ON/OFF Pin Input Voltage
.............. -0.3V <V< +Vin
Output Voltage to Ground
(Steady State)............... -1V
Power Dissipation.........(Note 2, 3)
Internally Limited
Storage Temperature Range
............-65 C < Ta < +150 C
Lead Temperature
(Soldering, 10 seconds)
METAL CAN................ 300 C
CERDIP .................. 260 C
CERAMIC SOIC ..............260 C
Maximum Junction Temperature....150 C
MNLM1575 Features
·Adjustable version output voltage range, 1.23V to 37V +4% max over line and load conditions
·Guaranteed 1A output current
·Requires only 4 external components
·52KHz fixed frequency internal oscillator
·TTL shutdown capability, low power standby mode
·High efficiency
·Uses readily available standard inductors
·Thermal shutdown and current limit protection
·Guaranteed 1A output current
·Requires only 4 external components
·52KHz fixed frequency internal oscillator
·TTL shutdown capability, low power standby mode
·High efficiency
·Uses readily available standard inductors
·Thermal shutdown and current limit protection
MNLM1575 Typical Application
· Simple high·efficiency step·down (buck) regulator
· Efficient pre·regulator for linear regulators
· On·card switching regulators
· Positive to negative converted (Buck·Boost)
· Efficient pre·regulator for linear regulators
· On·card switching regulators
· Positive to negative converted (Buck·Boost)
MNLM1575-12-X REV 0C0
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- Datasheet: MNLM1575-12-X REV 0C0
- File Size: 95972 KB
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