Voltage; Input Voltage And Limits - Analog Devices LTM4683 Manual

PMBus COMMAND DETAILS
FREQUENCY_SWITCH
The FREQUENCY_SWITCH command sets the switching frequency, in kHz, of the LTM4683.
Supported Frequencies
VALUE [15:0]
0x0000
0xF3E8
0xFABC
0xFB52
0xFBE8
0x023F
0x028A
0x02EE
0x03E8
The part must be in the Off state to process this command. The RUN pin must be low, or both channels must be com-
manded off. If the part is in the RUN state and this command is written, the command will be NACK'd and a BUSY
fault will be asserted. When the part is commanded off, and the frequency is changed, a PLL_UNLOCK status may be
detected as the PLL locks onto the new frequency.
This command has two data bytes and is formatted in Linear_5s_11s format.

VOLTAGE

Input Voltage and Limits

COMMAND NAME CMD CODE DESCRIPTION
VIN_OV_FAULT_LIMIT 0x55
VIN_UV_WARN_LIMIT 0x58
VIN_ON 0x35
VIN_OFF 0x36
MFR_ICHIP_CAL_GAIN 0xF7
VIN_OV_FAULT_LIMIT
The VIN_OV_FAULT_LIMIT command sets the value of the input voltage measured by the ADC, in volts, that causes
an input overvoltage fault.
This command has two data bytes in Linear_5s_11s format.
RESULTING FREQUENCY (TYP)
(kHz)
External Oscillator
250
350
425
500
575
650
750
1000
Input supply overvoltage fault limit.
Input supply undervoltage warning limit.
Input voltage at which the unit should start
power conversion.
Input voltage at which the unit should stop
power conversion.
The resistance value of the V
element in milliohms
For more information
TYPE PAGED
R/W N
Word
R/W N
Word
R/W N
Word
R/W N
Word
pin filter R/W N
IN
Word
www.analog.com
LTM4683
DATA
FORMAT UNITS NVM
L11 V Y
L11 V Y
L11 V Y
L11 V Y
L11 mΩ Y
DEFAULT
VALUE
15.5
0xD3E0
4.65
0xCA54
4.75
0xCA60
4.50
0xCA40
1000
0x03E8
Rev. 0
91