XM981A 60V 6A Charge Pump
ENABLES 48V TO 12V CONVERSION WITHOUT INDUCTORS
The move toward 48-volt power distribution is driven by practical electrical constraints rather than design aesthetics. As system power demands increase, higher bus voltages help limit current levels, reducing resistive losses and allowing smaller, lighter cabling which is a significant advantage in industrial and telecom hardware. However, much of the existing electronics ecosystem still relies on 12-volt rails, and redesigning established architectures simply to accept a higher input voltage is often inefficient and costly.
We address this challenge with the XM981A, which produces a regulated output equal to one quarter of the input voltage across a 20V–60V range, achieving this conversion without relying on an inductor
KEY FEATURES:
- Ideal for 48V-to-12V Intermediate Bus
- Data Centres, Telecom, Networking, PoE
- Industrial Automation and Building Systems
- Medical and Test Equipment
- LED signage and Optical Systems
- High Efficiency, Compact and Low-Profile
- 96.5% (VIN=48V, VOUT=12V, IOUT=2.4A)
- 95.0% (VIN=48V, VOUT=12V, IOUT=6A)
- Compact and Low-Profile
- No Inductor Required
- 11.5 x 9.5 x 2.1mm
- Simplifies layout and dramatically reduces design time
KEY ELECTRICAL PARAMETERS:
| SERIES | XM981AB403112-G | Evaluation Board | |
| Data Sheet |  |
|
|
| Output Current | 6.0A | ||
| Divider Ratio | 4 | ||
| VIN Range | 20 V ~ 60 V | ||
| VOUT Range | Vin/4 | ||
| Efficiency [%] | (48VIN/12VOUT) | ||
|
Protection Circuits |
Over Temperature Protection | ||
| Over Current Protection | |||
| UVLO | |||
|
Additional Features |
Enabled | ||
| Power Good | |||
| Parallel Operation | |||
| Frequency Synchronization | |||
| Operating temperature [degC] | -40 ~ 105℃ | ||
| Package |
LGA-52C01 |
||
TYPICAL APPLICATION CIRCUIT
PACKAGE
11.5 x 9.5 x 2.1mm
HIGH EFFICIENCY & IMPROVING TEMPERATURE RISING
TOREX’s charge pump architecture achieves low power loss as shown in the efficiency graph
Generates less heat, enabling smaller package size
MIGRATING 12V-INPUT DEVICES TO 48V SYSTEMS
Connect the existing 12V system downstream of the XM981A for smooth transition to 48V input
SCALING CURRENT WITHOUT REDESIGNING THE RAIL
- Up to four modules in parallel
- Automatic synchronisation via SYNC/SYNCSEL pins
- Optimised for even current/thermal distribution on PCB
Each XM981A can deliver output currents of up to 6A. The design supports paralleling as many as four IC’s, allowing total output capability to reach 24A when properly configured.
This scalable approach eliminates the need to switch to an entirely new regulator as power demands grow so rather than redesigning the power architecture, engineers can simply add additional modules and divide the load between them.
Operating devices in parallel does, however, require careful attention to PCB layout and thermal management. Proper current sharing and balanced trace routing become increasingly critical when multiple regulators operate together.
Even so, the ability to expand output capacity while retaining the same 48V-to-12V conversion architecture provides valuable flexibility as system power requirements increase
SAMPLES & EVALUATION BOARDS – AVAILABLE NOW
We have test samples and both single module and 4 module parallel evaluation boards ready to ship.
These boards make it easy to:
- Validate electrical performance
- Test thermal behaviour
- Evaluate parallel operation
- Measure transient response, ripple, and efficiency under real conditions