LM22674MR-5.0/NOPB
Active4.5V TO 42V, 500MA SIMPLE SWITCHER® BUCK CONVERTER WITH PRECISION ENABLE
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LM22674MR-5.0/NOPB
Active4.5V TO 42V, 500MA SIMPLE SWITCHER® BUCK CONVERTER WITH PRECISION ENABLE
Technical Specifications
Parameters and characteristics for this part
| Specification | LM22674MR-5.0/NOPB |
|---|---|
| Current - Output | 500 mA |
| Frequency - Switching | 500 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 | 1.81 mOhm |
| Package / Case | 8-PowerSOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 8-SO PowerPad |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 42 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Min/Fixed) | 5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 3.89 | |
| 10 | $ 3.49 | |||
| 95 | $ 2.86 | |||
| 285 | $ 2.71 | |||
| 570 | $ 2.43 | |||
| 1045 | $ 2.05 | |||
| 2565 | $ 1.95 | |||
| 5035 | $ 1.88 | |||
| Texas Instruments | TUBE | 1 | $ 2.93 | |
| 100 | $ 2.57 | |||
| 250 | $ 1.80 | |||
| 1000 | $ 1.45 | |||
Description
General part information
LM22674-Q1 Series
The LM22674 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 500 mA of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22674 also has built in thermal shutdown, and current limiting to protect against accidental overloads.
The LM22674 device is a member of Texas Instruments’ SIMPLE SWITCHER®family. The SIMPLE SWITCHER®concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH®design tool. TI’s WEBENCH®tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.
The LM22674 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 500 mA of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22674 also has built in thermal shutdown, and current limiting to protect against accidental overloads.
Documents
Technical documentation and resources
