peculiarity
2 C compatible interface
V OUT1 = 1V to 2V at 50 mV steps
V OUT2 = 1.8V to 3.3V at 100 mV levels
Automatic PFM/PWM mode switching and forced PWM low-noise operation mode
Spread spectrum capability, using Comet I 2
600 mA load per channel
PWM Fixed Switching Frequency of 2 MHz (Typical)
Efficient internal synchronous rectification
Internal soft start
Power-on reset function, two outputs
2.7V ≤ V IN ≤ 5.5V
Works from a single lithium-ion battery or 3 NiMH/NiCd batteries and 3.3V/5.5V fixed rails
2.2μH inductor, 4.7μF input per channel and 10μF output capacitor
16-Pin LLP Package (4 mm x 5 mm× 0.8 mm)
20-bump micro SMD package (3.0 mm× 2.0 mm× 0.6 mm)
illustrate
The LM3370 is a dual, step-down DC-to-DC converter optimized for ultra-low voltage circuit power from a single lithium-ion battery ranging from 2.7V to 5.5V input rails. It provides a 600 mAh load with two outputs per channel. The output voltage varies from 1V to 3.3V and can be dynamically controlled using an I2C-compatible interface. This dynamic voltage amp allows the processor to achieve the highest performance and lowest power consumption. The 2C compatible interface can also be used to control automatic PFM-PWM/PWM mode selection and other performance-enhancing features.
The LM3370 offers superior performance and the performance of a portable system with complex power management requirements. Intelligent PWM Low Noise and PFM Low Current modes automatically switch to provide improved system efficiency. Internal synchronous rectification increases the efficiency of the converter without the use of further external devices.
There is a power-on reset function, the output voltage level of the display to avoid accidental power loss losses. Enable each output independently, allowing for simple and efficient power sequencing.
The LM3370 is a 4 mm, 5 mm 16-pin non-pull LLP and 20-bump micro SMD in 3.0 mm× 2.0 mm× 0.6 mm package. The high switching frequency of 2 MHz (typical) allows for the use of tiny surface-mount components, including 2.2μH inductors.
The fixed voltage with a default of 2 output voltage combinations can be customized to suit the requirements of the system, contacted by the National Semiconductor Corporation.
apply
Baseband processor
Application Processor (Video, Audio)
I/O power supply
FPGA power supplies and CPLDs