Datasheet > UP1740S

UP1740S

更新时间： 2022-02-26 12:38:41

品牌	Logo	应用领域
力智 - UPI		双倍数据速率
页数	文件大小	规格书
14页	245K
描述
Complete DDR3/ DDR4 Memory Power Solution Converter

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数据手册

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UP1740S 数据手册

Conceptual

Complete DDR3/ DDR4 Memory Power Solution Converter

uP1740S

Features

General Description

Synchronous Buck Converter (VDDQ)

The uP1740S is a high performance synchronous buck

converter with 1.5Asource/sink LDO for memory system

power. It also provides a buffered low noise reference

VTTREF. The uP1740S has wide operation range from

4.5V to 26V for input voltage and 0.75V to 3.3V for memory

output voltage.

Wide Input Voltage Range from 4.5V to 26V

Fast Load Transient Response

Output Current up to 8A

RCOT^TMControl Topology

The synchronous buck of the uP1740S adopts uPI

proprietary robust constant on-time (RCOT^TM) PWM

scheme that features easy-to-use, low external component

count, fast transient response and quasi-constant

frequency operation over the operation range.

Soft-Off in S4/S5 States

Output or Adjustable from 0.75V to 3.3V

POK, OVP, UVP and Thermal Shutdown

LDO (VTT)

1.5A Source/Sink Capability

The 1.5A source/sink LDO for VTT has fast transient

response, requiring only two 10uF of ceramic output

capacitors. In addition, the LDO supply input is available

externally to significantly reduce the total power losses.

The uP1740S supports all the sleep state controls, in S3

state (suspend to RAM) VTT is disable and in S4/S5

(suspend to disk) VDDQ, VTT and VTTREF are soft off.

Requires Only Two 10uF Ceramic Output

Capacitors

Disable in S3 and Soft-Off in S4/S5

Thermal Shutdown

20mV Accuracy

Reference Voltage (VTTREF)

The uP1740S has complete functions including under

voltage protection, over current protection, over voltage

protection, power-up sequencing, power OK output, and

thermal shutdown. The uP1740S is available in WQFN4x4

- 32L package.

20mV Accuracy

Low Noise 10mA Output

RoHS Compliant and Halogen Free

Pin Configuration

Applications

Desktop PCs, Notebooks, and Workstations

Microprocessor and Chipset Supplies

DDR3/DDR3L/DDR4 Memory Power Supplies

SSTL-2 SSTL-18 and HSTL Bus Termination

PHASE

PGND

Exposed Pad II

(VIN)

Ordering Information

BOOT

VTTIN

VTT

Exposed Pad III

(PHASE)

Order Number

uP1740SQMI

Package Type

Remark

WQFN4x4 - 32L

VTTGND

VTTSNS

GND

Exposed Pad I

(VTTGND)

Note:

(1) Please check the sample/production availability with

uPI representatives.

VCC

(2) uPI products are compatible with the current IPC/

JEDEC J-STD-020 requirement. They are halogen-free,

RoHS compliant and 100% matte tin (Sn) plating that are

suitable for use in SnPb or Pb-free soldering processes.

uP1740S-DS-C3100, Dec. 2014

www.upi-semi.com

12 3 4 5 6 7...14

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