Product Summary
The LTC1699EMS8-81#TR is a precision (±0.35% max), digitally programmed resistor divider 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 LTC1699EMS8-81#TR incorporates 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 RUN/SS inputs. Applications are intel desktop pentium iii power supply, intel mobile pentium power supply with intel speedstep technology, desktop amd athlopower supply, software programmable remote power supply, power supplies with voltage margining.
Parametrics
LTC1699EMS8-81#TR absolute maximum ratings: (1)Supply Voltage (VCC): 7V; (2)All Pins : –0.3V to 7V; (3)Operating Temperature; (4)Range (Note 2): –40℃ to 85℃; (5)Junction Temperature : 125℃; (6)Storage Temperature : -65℃ to 150℃; (7)Lead Temperature (Soldering, 10 sec): 300℃.
Features
LTC1699EMS8-81#TR features: (1)Fully Compliant with Intel 5-Bit Mobile (LTC1699-80)and Desktop VRM8.4 (LTC1699-81)and VRM9.0 (LTC1699-82)VID Specifications; (2)Precisio±0.35% Programmable Resistor Divider for Use with 0.8V Referenced DC/DC Converters; (3)Two Different Divider Settings CaBe Stored Using a 2-Wire SMBus Serial Interface (Rev 1.1); (4)Built-ISafeguards Minimize Misprogramming Due to Bus Conflicts; (5)Three Open-DraiPins (CPU_ON, IO_ON, CLK_ON)and a Global Control Pi(VRON)to Shutdowor Soft-Start 3 DC/DC Converters Simultaneously; (6)PGOOD Piand 50ms PGOOD Timer; (7)Available iMSOP-8 and SSOP-16 Package.
Diagrams
Image | Part No | Mfg | Description | Pricing (USD) |
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LTC1699EMS8-81#TR |
IC PROGRAMMER VOLT SMBUS 8MSOP |
Data Sheet |
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LTC1699EMS8-81#TRPBF |
IC PROGRAMMER VOLT SMBUS 8MSOP |
Data Sheet |
Negotiable |
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