Single Phase D-CAP and D-CAP2 Controller with 2-bit Flexible VID Controller - TPS51518


Single Phase D-CAP and D-CAP2 Controller with 2-bit Flexible VID Controller



The TPS51518 is a single phase, D-CAP™/ D-CAP2™ synchronous buck controller with 2-bit VID inputs which can select up to four independent externally programmable output voltage levels where full external programmability in the voltage level, step setting and voltage transition slew rate is desired. It is used for GFX applications where multiple voltage levels are desired.

The TPS51518 supports all POS/SPCAP and/or all ceramic MLCC output capacitor options in applications where remote sense is a requirement. Tight DC load regulation is achieved through external programmable integrator capacitor.

The TPS51518 provides full protection suite, including OVP, OCL, 5-V UVLO and thermal shutdown. It supports the conversion voltage up to 28 V, and output voltages adjustable from 0.5 V to 2 V.

The TPS51518 is available in the 3 mm × 3 mm, QFN, 0.4-mm pitch package and is specified from –10°C to 105°C.


  • Differential Voltage Feedback
  • DC Compensation for Accurate Regulation
  • Wide Input Voltage Range: 3 V to 28 V
  • Flexible, 2-Bit VID Supports Output Voltage from 0.5 V to 2.0 V
  • Adaptive On-Time Modulation with Selectable Control Architecture
    • D-CAP Mode at 350 kHz for Fast Transient Response
    • D-CAP2 Mode at 350 kHz for Ultra-Low/Low ESR Output Capacitor
  • 4700 ppm/°C, Low-Side RDS(on) Current Sensing
  • Programmable Soft-Start Time and Output Voltage Transition Time
  • Built-In Output Discharge
  • Power Good Output
  • Integrated Boost Switch
  • Built-In OVP/UVP/OCP
  • Thermal Shutdown (Non-latched)
  • 3 mm × 3 mm, 20-Pin, QFN (RUK) Package

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Parametrics Compare all products in Buck Controller (External Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Special Features
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
TPS51518 TPS40197 TPS51513 TPS51727
3     4.5     3     4.5    
28     14     28     28    
0.5     0.9     0.7     0.4    
2     1.2     1.05     1.25    
20     6     25      
1     1     1     1    
  520     500      
350     520     500     500    
  2.5     2      
Power Good     Dynamic Voltage Scaling
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Dynamic Voltage Scaling
Light Load Efficiency
Power Good
Synchronous Rectification    
Power Good    
20     85     90     20    
-10 to 105     -40 to 85     -10 to 100     -10 to 100    
Catalog     Catalog     Catalog     Catalog    
WQFN     VQFN     VQFN     VQFN    
1.45 | 1ku     1.70 | 1ku     1.30 | 1ku     1.30 | 1ku    

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