LTC1699-81 SMBus VID Voltage Programmers

The LTC®1699-80, LTC1699-81 and LTC1699-82 are precision (±0.35% max), digitally programmed resistor dividers that comply with Intel 5-bit mobile (LTC1699-80), desktop VRM8.4 (LTC1699-81) and VRM9.0 (LTC1699-82) VID specifications. Each IC can switch the output of a DC/DC converter between two set voltages. A digital input pin, SEL, selects one of two divider settings stored into registers via a 2-wire SMBus interface.

The SMBus interface uses Write Word protocol to setup the registers and to turn the DC/DC converters on or off. Read Word protocol is used to verify register contents and to return the On/Off status of the converters. The LTC1699-80, LTC1699-81 and LTC1699-82 incorporate safeguards against errors due to bus conflicts.

Three open-drain N-channel outputs (CPU_ON, IO_ON and CLK_ON) are provided to turn DC/DC converter supplies on or off via their RUB/SS inputs. A global control pin, VRON is used to turn the converters on or off simultaneously. An internal timer pulls the PGOOD pin low for 50µs if the divider setting changes or the converters are turned on via the SMBus and the VRON pin

产品特点 Features

Fully Compliant with Intel 5-Bit Mobile (LTC1699-80) and Desktop VRM8.4 (LTC1699-81) and VRM9.0 (LTC1699-82) VID Specificatio
Precision ±0.35% Programmable Resistor Divider for Use with 0.8V Referenced DC/DC Converters
Two Different Divider Settings Can Be Stored Using a 2-Wire SMBus Serial Interface (Rev 1.1)
Built-In Safeguards Minimize Misprogramming Due to Bus Conflicts
Three Open-Drain Pins (CPU_ON, IO_ON, CLK_ON) and a Global Control Pin (VRON) to Shutdown or Soft-Start 3 DC/DC Converters Simul
PGOOD Pin and 50µs PGOOD Timer
Available in MSOP-8 and SSOP-16 Package

参数

应用

Intel Desktop Pentium® III Power Supply
Intel Mobile Pentium® Power Supply with Intel SpeedStep™ Technology
Desktop AMD Athlon™ Power Supply
Software Programmable Remote Power Supply
Power Supplies with Voltage Margining

典型应用图

LTC1699-81 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1699EGN-80	SSOP	16	E	$2.80	$2.50
LTC1699EGN-80#PBF	SSOP	16	E	$2.80	$2.50
LTC1699EGN-80#TR	SSOP	16	E		$2.61
LTC1699EGN-80#TRPBF	SSOP	16	E		$2.61
LTC1699EGN-81	SSOP	16	E	$2.80	$2.50
LTC1699EGN-81#PBF	SSOP	16	E	$2.80	$2.50
LTC1699EGN-81#TR	SSOP	16	E		$2.61
LTC1699EGN-81#TRPBF	SSOP	16	E		$2.61
LTC1699EGN-82	SSOP	16	E	$2.80	$2.50
LTC1699EGN-82#PBF	SSOP	16	E	$2.80	$2.50
LTC1699EGN-82#TR	SSOP	16	E		$2.61
LTC1699EGN-82#TRPBF	SSOP	16	E		$2.61
LTC1699EMS8-80	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-80#PBF	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-80#TR	MSOP	8	E		$2.21
LTC1699EMS8-80#TRPBF	MSOP	8	E		$2.21
LTC1699EMS8-81	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-81#PBF	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-81#TR	MSOP	8	E		$2.21
LTC1699EMS8-81#TRPBF	MSOP	8	E		$2.21
LTC1699EMS8-82	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-82#PBF	MSOP	8	E	$2.40	$2.15
LTC1699EMS8-82#TR	MSOP	8	E		$2.21
LTC1699EMS8-82#TRPBF	MSOP	8	E		$2.21

LTC1699-81 数据手册及相关资料下载

数据手册(英文) : LTC1699 Series - SMBus VID Voltage Programmers.PDF
设计要点 (英文) : DN117 - 70mOhm Protected Load Management Switch.PDF
设计要点 (英文) : DN279 - Microprocessor Core Supply Voltage Set by I2C Bus Without VID Lines.PDF
可靠性数据 : R421 Reliability Data .PDF