LM20343MHX/NOPB
Active4.5-36V, 3A CURRENT MODE SYNCHRONOUS BUCK REGULATOR WITH ADJUSTABLE FREQUENCY
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LM20343MHX/NOPB
Active4.5-36V, 3A CURRENT MODE SYNCHRONOUS BUCK REGULATOR WITH ADJUSTABLE FREQUENCY
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM20343MHX/NOPB |
|---|---|
| Current - Output | 3 A |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 20-PowerTSSOP |
| Package / Case | 0.173 in |
| Package / Case [custom] | 4.4 mm |
| Supplier Device Package | 20-HTSSOP |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 36 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Max) [Max] | 28.8 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.79 | |
| 10 | $ 4.30 | |||
| 25 | $ 4.07 | |||
| 100 | $ 3.53 | |||
| 250 | $ 3.35 | |||
| 500 | $ 3.00 | |||
| 1000 | $ 2.53 | |||
| Digi-Reel® | 1 | $ 4.79 | ||
| 10 | $ 4.30 | |||
| 25 | $ 4.07 | |||
| 100 | $ 3.53 | |||
| 250 | $ 3.35 | |||
| 500 | $ 3.00 | |||
| 1000 | $ 2.53 | |||
| Tape & Reel (TR) | 2500 | $ 2.41 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.62 | |
| 100 | $ 3.17 | |||
| 250 | $ 2.22 | |||
| 1000 | $ 1.79 | |||
Description
General part information
LM20343 Series
The LM20343 is a full featured synchronous buck regulator capable of delivering up to 3A of load current. The current mode control loop is externally compensated with only two components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.
The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit.
The frequency of this device can be adjusted from 250 kHz to 1.0 MHz by connecting an external resistor from the RT pin to ground.