| Part Number(s) (NSID) |
Top View | Type | Pins | MSL Rating | Peak Reflow | RoHS Status |
CAD Symbols | Models | Package Marking Format |
|---|---|---|---|---|---|---|---|---|---|
| LM5574MT/NOPB LM5574MT |
 |
TSSOP | 16 | 1 1 |
260 260 |
Detail | Download | N/A |
NSUZXYTT LM5574 MT |
| LM5574MTX/NOPB LM5574MTX |
|
TSSOP | 16 | 1 1 |
260 260 |
Detail | Download | N/A |
NSUZXYTT LM5574 MT |
| LM5574QMT/NOPB |
|
TSSOP | 16 | 1 | 260 | Detail | Download | N/A |
NSUZXYTT LM5574 QMT |
| LM5574QMTX/NOPB |
|
TSSOP | 16 | 1 | 260 | Detail | Download | N/A |
NSUZXYTT LM5574 QMT |
PDF
Description
The LM5574 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 75V, the LM5574 delivers 0.5A of continuous output current with an integrated 750mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM5574 is supported by the full suite of WEBENCH On-Line design tools.
| • | Automotive |
| • | Industrial |
| • | LM5574Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (−40°C to + 125°C operating junction temperature) |
| • | Integrated 75V, 750mΩ N-channel MOSFET |
| • | Ultra-wide input voltage range from 6V to 75V |
| • | Adjustable output voltage as low as 1.225V |
| • | 1.5% feedback reference accuracy |
| • | Operating frequency adjustable between 50kHz and 500kHz with single resistor |
| • | Master or slave frequency synchronization |
| • | Adjustable soft-start |
| • | Emulated current mode control architecture |
| • | Wide bandwidth error amplifier |
| • | Built-in protection |
| • | Automotive Grade product datasheet that is AEC-Q100 grade 0 qualified is available upon request |
| • | (−40°C to + 150°C operating junction temperature) |
Diagrams
Typical Application
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Block Diagram
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Typical Performance 
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