Summary of LTM4623 – Ultrathin 20VIN, 3A Step-Down DC/DC μModule (Power Module) Regulator
The LTM4623 is an ultrathin 3A step-down DC/DC μModule regulator offering a compact solution in less than 1cm². It features a wide input voltage range (4V–20V, or down to 2.375V with bias), adjustable output from 0.6V to 5.5V, and comprehensive protection against overvoltage, overcurrent, and overtemperature. The module integrates all necessary components for high efficiency and fast transient response within a tiny LGA or BGA package.
Parts used in the LTM4623 Project:
- LTM4623 Power Module
- Switching Controller
- Power FETs
- Inductor
- Support Components
- Single External Resistor
- Ceramic Input Capacitors
- Ceramic Output Capacitors
- External Bias Supply
Features
- <2mm Height, Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2(Dual-Sided PCB)
- Wide Input Voltage Range: 4V to 20V
- Input Voltage Down to 2.375V with External Bias
- 0.6V to 5.5V Output Voltage
- 3A DC Output Current
- ±1.5% Maximum Total DC Output Voltage Error
- Current Mode Control, Fast Transient Response
- Low EMI EN55022 Class B Compliant
- External Frequency Synchronization
- Multiphase Operation with Current Sharing
- Output Voltage Tracking
- Selectable Discontinuous Mode
- Power Good Indicator
- Overvoltage, Overcurrent and Overtemperature Protection
- Ultrathin (6.25mm × 6.25mm × 1.82mm) LGA Package and (6.25mm × 6.25mm × 2.42mm) BGA Package
Typical Application
Description
The LTM®4623 is a complete 3A step-down switching mode μModule (power module) regulator in a tiny ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA packages. Included in the package are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of 4V to 20V or 2.375V to 20V with an external bias supply, the LTM4623 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 3A continuous output current. Only ceramic input and output capacitors are needed.
The LTM4623 supports selectable discontinuous mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent and overtemperature protection.
The LTM4623 is available with SnPb (BGA) or RoHS compliant terminal finish.
For more detail: LTM4623 – Ultrathin 20VIN, 3A Step-Down DC/DC μModule (Power Module) Regulator
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What is the maximum total DC output voltage error?
The maximum total DC output voltage error is ±1.5%. -
Can the input voltage go as low as 2.375V?
Yes, the input voltage can go down to 2.375V when using an external bias supply. -
How do I set the output voltage?
The output voltage is set by a single external resistor. -
Does the LTM4623 require any specific capacitors?
Only ceramic input and output capacitors are needed for this design. -
What types of packages are available for this regulator?
It is available in an ultrathin 6.25mm × 6.25mm × 1.82mm LGA package and a 6.25mm × 6.25mm × 2.42mm BGA package. -
Does the device support output voltage tracking?
Yes, the LTM4623 supports output voltage tracking for supply rail sequencing. -
Is the device compliant with EMI standards?
Yes, it is Low EMI EN55022 Class B Compliant. -
What fault protections are included?
Fault protection features include overvoltage, overcurrent, and overtemperature protection.
