The PTHxx050Y are a series of ready-to-use switching regulator modules from Texas Instruments designed specifically for bus termination in DDR and QDR memory applications. Operating from either a 3.3-V, 5-V or 12-V input, the modules generate a V_TT output that will source or sink up to 6 A of current (8 A transient) to accurately track their V_REF input. V_TT is the required bus termination supply voltage, and V_REF is the reference voltage for the memory and chipset bus receiver comparators. V_REF is usually set to half the V_DDQ power supply voltage.

Both the PTHxx050Y series employs an actively switched synchronous rectifier output to provide state-of-the-art step-down switching conversion. The products are small in size (0.87 in × 0.5 in), and are an ideal choice where space, performance, and high efficiency are desired, along with the convenience of a ready-to-use module.

Operating features include an on/off inhibit and output over-current protection (source mode only). The on/off inhibit feature allows the V_TT bus to be turned off to save power in a standby mode of operation.

Package options include both through-hole and surface mount configurations.

• VTT Bus Termination Output (Output Tracks the System VREF)
• 6 A Output Current (8 A Peak)
• 3.3-V, 5-V or 12-V Input Voltage
• DDR and QDR Compatible
• On/Off Inhibit (for VTT Standby)
• Under-Voltage Lockout
• Operating Temp: –40 to +85°C
• Efficiencies up to 88 %
• Output Overcurrent Protection (Non-Latching, Auto-Reset)
• 50 W/in3 Power Density
• Safety Agency Approvals: UL/cUL60950, EN60950, VDE
• Point-of-Load Alliance (POLA?) Compatible

POLA is a trademark of Texas Instruments.

• Iout (Max) (A)
• 6
• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 5.5
• Vout (Min) (V)
• 0.55
• Vout (Max) (V)
• 1.8
• Soft start
• Fixed
• Features
• Enable, Overcurrent protection, Tracking
• Iq (Typ) (uA)
• 10000
• Regulated outputs (#)
• 1
• Switching frequency (Max) (kHz)
• 650
• Switching frequency (Min) (kHz)
• 550
• Duty cycle (Max) (%)
• 100
• Topology
• Buck

PTH05050Y的完整型号有：PTH05050YAH、PTH05050YAS、PTH05050YAZ、PTH05050YAZT，以下是这些产品的关键参数及官网采购报价：

PTH05050YAH，工作温度：-40 to 85，封装：Through-Hole Module (EUU)-6，包装数量MPQ：56个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SN，TI官网PTH05050YAH的批量USD价格：8.47（1000+）

PTH05050YAS，工作温度：-40 to 85，封装：Surface Mount Module (EUV)-6，包装数量MPQ：56个，MSL 等级/回流焊峰值温度：Level-1-235C-UNLIM/Level-3-260C-168HRS，引脚镀层/焊球材料：SNPB，TI官网PTH05050YAS的批量USD价格：8.47（1000+）

PTH05050YAZ，工作温度：-40 to 85，封装：Surface Mount Module (EUV)-6，包装数量MPQ：56个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SNAGCU，TI官网PTH05050YAZ的批量USD价格：8.47（1000+）

PTH05050YAZT，工作温度：-40 to 85，封装：Surface Mount Module (EUV)-6，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SNAGCU，TI官网PTH05050YAZT的批量USD价格：8.47（1000+）

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