LM3679UR-1.2/NOPB
Active3MHZ, 350MA MINIATURE STEP-DOWN DC-DC CONVERTER FOR ULTRA LOW PROFILE APPLICATIONS
Deep-Dive with AI
Search across all available documentation for this part.
LM3679UR-1.2/NOPB
Active3MHZ, 350MA MINIATURE STEP-DOWN DC-DC CONVERTER FOR ULTRA LOW PROFILE APPLICATIONS
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3679UR-1.2/NOPB |
|---|---|
| Current - Output | 350 mA |
| Frequency - Switching | 3 MHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Output Configuration | Positive |
| Output Type | 1.81 mOhm |
| Package / Case | DSBGA, 5-XFBGA |
| Supplier Device Package | 5-DSBGA (1.47x1.02) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 5.5 V |
| Voltage - Input (Min) [Min] | 2.5 V |
| Voltage - Output (Min/Fixed) | 1.2 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 | $ 2.19 | |
| 10 | $ 1.41 | |||
| 25 | $ 1.20 | |||
| 100 | $ 0.96 | |||
| Digi-Reel® | 1 | $ 2.19 | ||
| 10 | $ 1.41 | |||
| 25 | $ 1.20 | |||
| 100 | $ 0.96 | |||
| Tape & Reel (TR) | 250 | $ 0.85 | ||
| 500 | $ 0.78 | |||
| 750 | $ 0.74 | |||
| 1250 | $ 0.70 | |||
| 1750 | $ 0.68 | |||
| 2500 | $ 0.66 | |||
| 6250 | $ 0.61 | |||
| 12500 | $ 0.58 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.12 | |
| 100 | $ 0.86 | |||
| 250 | $ 0.63 | |||
| 1000 | $ 0.45 | |||
Description
General part information
LM3679 Series
The LM3679 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5V to 5.5V. It provides up to 350mA load current, over the entire input voltage range. The LM3679 output voltage can be configured to 1.2V, 1.5V, or 1.8V.
The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode operation, the device operates at a fixed-frequency of 3 MHz (typ). PWM mode drives loads from ~ 80mA to 350mA max. Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ) during light load and standby operation. Internal synchronous rectification provides high efficiency. In shutdown mode (Enable pin pulled low), the device turns off and reduces battery consumption to 0.01 µA (typ).
The LM3679 is available in a lead-free (No PB) 5-bump micro SMD package, 0.6mm height, and in an ultra thin 0.3mm height UR package. Using the UR package along with specific external components, allows for a low profile solution size with a max height of 0.55mm. A switching frequency of 3 MHz (typ) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required. .
Documents
Technical documentation and resources
