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Features: . Synchronous Buck Controller (VDDQ) Wide-Input Voltage Range: 3.0-V to 28-V DCAP(TM) Mode with 100-ns Load Step Re-sponse 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) or Adjust...

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SeekIC No. : 004526847 Detail

TPS51116: Features: . Synchronous Buck Controller (VDDQ) Wide-Input Voltage Range: 3.0-V to 28-V DCAP(TM) Mode with 100-ns Load Step Re-sponse Current Mode Option Supports Ceramic Output Capacitors Supports S...

TPS51116 Data Sheet

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Part Number:: TPS51116
Supply Ability:: 5000

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Product Details

Description

Features:

. Synchronous Buck Controller (VDDQ)
Wide-Input Voltage Range: 3.0-V to 28-V
DCAP(TM) Mode with 100-ns Load Step Re-sponse
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) or Adjustable Output (1.5-V to 3.0-V)
Equipped with Powergood, Overvoltage Pro- tection 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-F Ceramic Output Ca-pacitor
Buffered Low Noise 10-mA Output
Accuracy ±20 mV for both VREF and VTT
Supports High-Z in S3 and Soft-Off in S4/S5
Thermal Shutdown

Application

. DDR/DDR2 Memory Power Supplies
. SSTL-2 SSTL-18 and HSTL Termination

Pinout

Connection Diagram

Specifications

		TPS51116	UNITS
VIN Input voltage range	VBST	-0.3 to 36	V
	VBST wrt LL	-0.3 to 6
	CS, MODE, S3, S5, VTTSNS, VDDQSNS, V5IN, VLDOIN, VDDQSET	-0.3 to 6
	PGND, VTTGND	-0.3 to 0.3
VOUT Output voltage range	DRVH	-1.0 to 36	V
	LL	-1.0 to 30
	COMP, DRVL, PGOOD, VTT, VTTREF	-0.3 to 6
T_A Operating ambient temperature range		-40 to 85	°C
T_stgStorage temperature		-55 to 150

Description

The TPS51116 provides a complete power supply for both DDR/SSTL-2 and DDR2/SSTL-18 memory sys- tems. 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 control- ler runs fixed 400kHz pseudo-constant frequency PWM with an adaptive on-time control that can be configured in D-CAP(TM) 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-F (2 * 10 F) 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). The TPS51116 has all of the protection features including thermal shutdown and is in a 20-pin HTSSOP PowerPAD(TM) package.

TPS51116

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