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LTC2979 Datasheet(PDF) 3 Page - Linear Technology

Part No. LTC2979
Description  16-Channel PMBus Low-Voltage Power System Manager
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2979 Datasheet(HTML) 3 Page - Linear Technology

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LTC2979
3
2979f
For more information www.linear.com/LTC2979
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. VDD33 = 3.3V, VIN_SNS = 12V, VDD25 and REF pins floating, unless
otherwise indicated. (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Characteristics
IVDD33
VDD33 Supply Current
3.13V ≤ VDD33 ≤ 3.47V
l
10
13
mA
VUVLO_VDD33 VDD33 Undervoltage Lockout
VDD33 Ramping Up
l
2.35
2.55
2.8
V
VDD33 Undervoltage Lockout
Hysteresis
120
mV
VDD33
Supply Input Operating Range
l
3.13
3.47
V
VDD25
Regulator Output Voltage
3.13V ≤ VDD33 ≤ 3.47V
l
2.35
2.5
2.6
V
Regulator Output Short-Circuit Current VDD33 = 3.47V, VDD25 = 0V
l
30
55
80
mA
tINIT
Initialization Time
Time from VIN Applied Until the TON_DELAY
Timer Starts
30
ms
Voltage Reference Characteristics
VREF
Output Voltage (Note 4)
VREF = VREFP – VREFM, 0 < IREFP < 100µA
1.232
V
Temperature Coefficient
3
ppm/°C
Hysteresis
(Note 5)
100
ppm
ADC Characteristics
VIN_ADC
Voltage Sense Input Range
Differential Voltage:
VIN_ADC = (VSENSEPn – VSENSEMn)
l
0
6
V
Single-Ended Voltage: VSENSEMn
l
–0.1
0.1
V
Current Sense Input Range (Odd
Numbered Channels Only)
Single-Ended Voltage: VSENSEPn, VSENSEMn
l
–0.1
6
V
Differential Voltage: VIN_ADC
l
–170
170
mV
N_ADC
Voltage Sense Resolution (Uses L16
Format)
0V ≤ VIN_ADC ≤ 6V
Mfr_config_adc_hires = 0
122
µV/LSB
Current Sense Resolution (Odd
Numbered Channels Only)
0mV ≤ |VIN_ADC| < 16mV (Note 6)
16mV ≤ |VIN_ADC| < 32mV
32mV ≤ |VIN_ADC| < 63.9mV
63.9mV ≤ |VIN_ADC| < 127.9mV
127.9mV ≤ |VIN_ADC|
Mfr_config_adc_hires = 1
15.625
31.25
62.5
125
250
µV/LSB
µV/LSB
µV/LSB
µV/LSB
µV/LSB
TUE_ADC_
VOLT_SNS
Total Unadjusted Error (Note 4)
Voltage Sense Mode VIN_ADC ≥ 1V
l
±0.5
% of
Reading
Voltage Sense Mode 0 ≤ VIN_ADC ≤ 1V
l
±5.0
mV
TUE_ADC_
CURR_SNS
Total Unadjusted Error (Note 4)
Current Sense Mode, Odd Numbered
Channels Only, 20mV ≤ VIN_ADC ≤ 170mV
l
±0.7
% of
Reading
Current Sense Mode, Odd Numbered
Channels Only, VIN_ADC ≤ 20mV
l
±140
µV
VOS_ADC
Offset Error
Current Sense Mode, Odd Numbered
Channels Only
l
±100
µV
tCONV_ADC
Conversion Time
Voltage Sense Mode (Note 7)
6.15
ms
Current Sense Mode (Note 7)
24.6
ms
Temperature Input (Note 7)
24.6
ms
tUPDATE_ADC Update Time
Odd Numbered Channels in Current Sense
Mode (Note 7)
160
ms
CIN_ADC
Input Sampling Capacitance
1
pF


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