TPSM846C23 4.5V to 15V Input, 0.35V to 2.0V Output, 35A PMBus Power Module |


4.5V to 15V Input, 0.35V to 2.0V Output, 35A PMBus Power Module


Recommended alternative parts

  • TPSM846C24  -  Pin-compatible version of TPSM846C23 without PMBus


The TPSM846C23 is a 35-A fixed-frequency, PMBus-compliant, step-down power module, with PMBus commands that allow for the configuration, control, and monitoring of key power regulator functions. The module incorporates the controller, power MOSFETs, inductor, and associated components into a rugged, thermally enhanced, surface-mount package. The user supplies the input and output capacitors along with a few other passive components to set the operating parameters of the module. Two modules can be configured to work in parallel to provide up to a 70-A, two-phase power solution.

The PMBus interface provides for converter configuration of output voltage, UVLO, soft start, soft stop, overcurrent, and thermal shutdown parameters. The interface also provides support for telemetry that can report the actual output voltage, output current, and device temperature. Standard PMBus warning and fault functions are also supported. The device supports PMBus communication speeds up to 400 kHz and supports a subset of the commands in the PMBus 1.3 specification.

The 15-mm × 16-mm component footprint is easy to solder onto a printed circuit board and allows a compact, point-of-load design.


  • Complete Integrated PMBus™ Power Solution
  • Pin Compatible With TPSM846C24 (non-PMBus)
  • Stackable up to 70 A With Current Sharing
  • Output Voltage Range 0.35 V to 2 V
  • Output Voltage Accuracy as Tight as 0.5%
  • 15 mm × 16 mm Footprint (6.4 Max Height)
  • 300-kHz to 1-MHz Switching Frequency
  • Synchronization to an External Clock
  • Differential Remote Sense
  • Power-Good Output
  • Prebias Output Monotonic Start-Up
  • PMBus Telemetry: Current, Voltage, Temperature
  • Programmable Protection and Fault Response
  • Programmable UVLO, Soft Start/Stop, Delays
  • Operating IC Junction Range: –40°C to +125°C
  • Operating Ambient Range: –40°C to +105°C
  • Enhanced Thermal Performance: 8.7°C/W
  • Meets EN55022 Class A Emissions
  • Create a Custom Design Using the TPSM846C23 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck modules (integrated inductor)

Iout (Max) (A)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Soft Start
Regulated Outputs (#)
Package Size: mm2:W x L (PKG)
Switching Frequency (Max) (kHz)
Switching Frequency (Min) (kHz)
Switching Frequency (Typ) (kHz)
Operating Temperature Range (C)
Duty Cycle (Max) (%)
Package Group
TPSM846C23 LMZ31520 LMZ31530 TPSM846C24
35     20     30     35    
4.5     3     3     4.5    
15     14.5     14.5     15    
0.35     0.6     0.6     0.5    
2     3.6     3.6     2    
Adjustable     Adjustable     Adjustable     Fixed    
Current Sharing
EMI Tested
Frequency Synchronization
Phase Interleaving
Power Good
Remote Sense
EMI Tested
Light Load Efficiency
Power Good
Remote Sense    
EMI Tested
Light Load Efficiency
Power Good
Remote Sense    
Current Sharing
EMI Tested
Frequency Synchronization
Output Discharge
Power Good
Remote Sense    
1     1     1     1    
See datasheet (QFM)     72BQFN: 240 mm2: 15 x 16 (BQFN | 72)     72BQFN: 240 mm2: 15 x 16 (BQFN | 72)     See datasheet (QFM)    
1000     850     850     1000    
300     300     300     300    
500     500     500     500    
Buck     Buck     Buck     Buck    
-40 to 105     -40 to 85     -40 to 85     -40 to 105    
83     80     80     83    
QFM | 59     BQFN | 72     BQFN | 72     QFM | 59    
Catalog     Catalog     Catalog     Catalog    
Module     Module     Module     Module    

Design tool

WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPSM846C23

  Min   Max Range
Vin  V 4.5 to 15.0V
Vout  V 0.35 to 2V
Iout  A ≤ 35A
Ambient Temp  °C -40 to 105°C

Footprint BOM Cost Efficiency

Preview design