Features and Benefits
- Tiny Surface Mount, 4mm × 4mm × 4.32mm LGA Package
- Silent Switcher®2 Architecture
- Ultralow EMI Noise
- Input Voltage Range: 2.25V to 5.5V
- Output Voltage Range: 0.5V to VIN
- 10A DC Output Current
- Current Mode Control, Fast Transient Response
- Multiphase Parallel Current Sharing with Multiple LTM4658s
- Output Soft-Start with Voltage Tracking
- External Frequency Synchronization
- Selectable Pulse-Skipping Mode
- Power Good Indicator
- Die Temperature Monitoring Output
- Overvoltage, Overcurrent and Overtemperature Protection
The LTM4658 is a complete 10A step-down switching mode μModule® regulator in a tiny 4mm × 4mm × 4.32mm LGA package. Included in the package are the switching controller, power MOSFETs, inductor and all support components. Operating over an input voltage range of 2.25V to 5.5V, the LTM4658 supports an output voltage range of 0.5V to VIN set by external resistors. Its high efficiency design delivers 10A continuous output current. Only ceramic input and output capacitors are needed.
The LTM4658 employs a Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at high switching frequencies.
The LTM4658 also supports frequency synchronization, multiphase operation, selectable pulse-skipping mode operation, output voltage tracking for supply rail sequencing. Its high switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent and overtemperature protection. The LTM4658 is Pb-Free and RoHS compliant.
- Telecom, Datacom, Networking System
- Optical Module
- Industrial Equipment
- Point-of-Load Regulation
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 2861A features the LTM4658, a high efficiency, 10A step-down power μModule® regulator. The input voltage range is from 2.25V to 5.5V. The output voltage range is 0.5V to VIN. Derating may be necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2861A offers the SSTT pin allowing the user to program output tracking, soft-start period and die temperature monitoring.
The MODE/SYNC pin either synchronizes the switching frequency to an external clock, is a clock output, or sets the PWM mode. It can be externally synchronized to a clock from 1MHz to 2.25MHz. The PWM modes of operation are forced continues mode for low noise or pulse-skipping (PS) mode for high efficiency at light load. The LTM4658 defaults to forced continues mode during synchronization. The LTM4658 operates in pulse-skipping mode when both the FREQ and MODE/SYNC pins are connected to VIN.
LTM4658 has internal compensation circuit which guarantees sufficient stability margins and good transient performance with a wide range of output capacitors, even with all ceramic output capacitors.
For output loads that demand more than 10A of current, multiple LTM4658s can be paralleled to run out of phase to provide more output current without increasing input and output voltage ripples.
The LTM4658 data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit DC2861A.
Tools & Simulations
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