Datasheet

LTC2991
32
2991fd
For more information www.linear.com/LTC2991
 LINEAR TECHNOLOGY CORPORATION 2011
LT 0314 REV D • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com/LTC2991
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC2990 Quad I
2
C Temperature, Voltage and
Current Monitor
Remote and Internal Temperatures, 14-Bit Voltages and Current, Internal 10ppm/°C
Reference
LTC2997 Remote/Internal Temperature Sensor Temperature to Voltage with Integrated 1.8V Voltage Reference, ±1°C Accuracy
LTC6102/LTC6102HV Precision Zero Drift Current Sense
Amplifier
5V to 100V, 105V Absolute Maximum (LTC6102HV)
LTC1392 Micropower Temperature, Power Supply
and Differential Voltage Monitor
Complete Ambient Temperature Sensor Onboard
LTC2970 Dual I
2
C Power Supply Monitor and
Margining Controller
Integrated Reference and On-Chip Temperature Sensor
Sequence, Trim, Margin and Supervise Eight Power Supplies
LTC2977 Octal PMBus Power Supply Manager
with EEPROM
Integrated Reference and On-Chip T
emperature Sensor and Fault Logging
LTC2945 High Voltage I
2
C Power Monitor 0V to 80V Range, 12-Bit Voltage and Current. Measurement with 0.75% TUE I
2
C Interface
Calculates 24-Bit Power Value, Stores Minimum and Maximum Values
LTC2487 16-Bit 2-, 4-Channel Delta Sigma ADC
with PGA, Easy Drive™ and I
2
C Interface
Internal Temperature Sensor
LM134 Constant Current Source and
Temperature Sensor
Can Be Used as Linear Temperature Sensor
Parasitic Resistance Voltage and Current Monitoring with Temperature Compensation
V
CC
V1
2.1k 2.1k
LTC2991
INDUCTOR WITH
R
PARASITIC
R
PARASITIC
~ 4000ppm/°C
I
LOAD
BUCK
REGULATOR
2-WIRE I
2
C
INTERFACE
5V
GND
THERMAL
COUPLING
CONTROL REGISTER 0x06: 0xA1:
T
AMBIENT
REG 1A, 1B: 0.0625°C/LSB
V
LOAD
REG 0A, 0B: 305µV/LSB
I
LOAD
REG 0C, 0D: 190.75µA/LSB
T
RPARASITIC
REG 1A, 1B: 0.0625°C/LSB
V
CC
REG 1C, 1D: 2.5V + 305.18µV/LSB
QUIET NODE
SWITCHING
WAVEFORM
MMBT3904
VOLTAGE, CURRENT AND TEMPERATURE CONFIGURATION
SDA
SCL
ADR0
ADR1
ADR2
V3
V4
V2
2991 TA12
T
AMBIENT
1µF
1µF
1µF
OTHER APPS
V5 TO V8
4
1µF
5V