DDR1, DDR2,  DDR3 Switcher and LDO - TPS51116

TPS51116 (ACTIVE)

DDR1, DDR2, DDR3 Switcher and LDO

Description

The TPS51116 provides a complete power supply for DDR/SSTL-2, DDR2/SSTL-18, DDR3/SSTL-15, and LPDDR3 memory systems. It integrates a synchronous buck controller with a 3-A sink/source tracking linear regulator and buffered low noise reference. The TPS51116 offers the lowest total solution cost in systems where space is at a premium. The TPS51116 synchronous controller runs fixed 400-kHz, pseudo-constant frequency PWM with an adaptive on-time control that can be configured in D-CAP Mode for ease of use and fastest transient response or in current mode to support ceramic output capacitors. The 3-A sink/source LDO maintains fast transient response only requiring 20-μF (2 × 10 μF) of ceramic output capacitance. In addition, the LDO supply input is available externally to significantly reduce the total power losses. The TPS51116 supports all of the sleep state controls placing VTT at high-Z in S3 (suspend to RAM) and discharging VDDQ, VTT and VTTREF (soft-off) in S4/S5 (suspend to disk). TPS51116 has all of the protection features including thermal shutdown and is offered in both a 20-pin HTSSOP PowerPAD package and 24-pin 4×4 QFN.

Features

  • Synchronous Buck Controller (VDDQ)
    • Wide-Input Voltage Range: 3.0-V to 28-V
    • D−CAP™ Mode with 100-ns Load Step Response
    • Current Mode Option Supports Ceramic Output Capacitors
    • Supports Soft-Off in S4/S5 States
    • Current Sensing from RDS(on) or Resistor
    • 2.5-V (DDR), 1.8-V (DDR2), Adjustable to
      1.5-V (DDR3) or 1.2-V (LPDDR3) or
      Output Range 0.75-V to 3.0-V
    • Equipped with Powergood, Overvoltage Protection and Undervoltage Protection
  • 3-A LDO (VTT), Buffered Reference (VREF)
    • Capable to Sink and Source 3 A
    • LDO Input Available to Optimize Power Losses
    • Requires only 20-μF Ceramic Output Capacitor
    • Buffered Low Noise 10-mA VREF Output
    • Accuracy ±20 mV for both VREF and VTT
    • Supports High-Z in S3 and Soft-Off in S4/S5
    • Thermal Shutdown

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Parametrics Compare all products in DDR Memory Power Solutions

 
DDR Memory Type
Control Mode
Iout VDDQ (Max) (A)
Iout VTT (Max) (A)
Iq (Typ) (mA)
Output
Vin (Min) (V)
Vin (Max) (V)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS51116 TPS51216 TPS51716 TPS51916 TPS59116
DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
DDR
DDR2
DDR3
DDR3L
DDR4
LPDDR2
LPDDR3    
Current Mode
D-CAP
S4/S5    
D-CAP
S4/S5    
D-CAP2
S3
S4/S5    
D-CAP
D-CAP2
S3
S4/S5    
Current Mode
D-CAP    
25     25     25     25     25    
3     2     2     2     3    
0.8     0.6     0.6     0.6     0.8    
VDDQ
VTT
VREF    
VDDQ
VTT
VREF    
VDDQ
VTT
VREF    
VDDQ
VTT
VREF    
VDDQ
VTT
VREF    
3     3     3     3     3    
28     28     28     28     28    
Complete Solution
Shutdown Pin for S3    
Shutdown Pin for S3     Complete Solution     Complete Solution     Shutdown Pin for S3    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
20HTSSOP
24VQFN    
20WQFN     20WQFN     20WQFN     24VQFN    
1.05 | 1ku     1.00 | 1ku     1.10 | 1ku     1.50 | 1ku     1.16 | 1ku    

Other qualified versions of TPS51116

Version Part Number Definition
Enhanced Product TPS51116-EP Supports Defense, Aerospace and Medical Applications
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