LTC4449 datasheet(8/108 Pages) LINER

8 / 108 page

LTC3882-1

Rev A

For more information www.analog.com

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3882-1 is tested under pulsed load conditions such that

TJ ≈ TA. The LTC3882-1E is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the –40°C to 125°C operating

junction temperature range are assured by design, characterization and

correlation with statistical process controls. The LTC3882-1I is guaranteed

over the full –40°C to 125°C operating junction temperature range.

Junction temperature TJ is calculated in °C from the ambient temperature

TA and power dissipation PD according to the formula:

TJ = TA + (PD • θJA)

where θJA is the package thermal impedance. Note that the maximum

ambient temperature consistent with these specifications is determined by

specific operating conditions in conjunction with board layout, the rated

package thermal impedance and other environmental factors. Refer to the

Applications Information section.

Note 3: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. The maximum

rated junction temperature will be exceeded when this protection is active.

Continuous operation above the specified absolute maximum operating

junction temperature may impair device reliability or permanently damage

the device.

Note 4: EEPROM endurance, retention and mass write times are

guaranteed by design, characterization and correlation with statistical

process controls. Minimum retention applies only for devices cycled less

than the minimum endurance specification. EEPROM read commands

(e.g. RESTORE_USER_ALL) are valid over the entire specified operating

junction temperature range.

Note 5: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to GND unless otherwise

specified.

Note 6: Minimum EEPROM endurance, retention and mass write time

specifications apply when writing data with 3.15V ≤ VDD33 ≤ 3.45V.

EEPROM read commands are valid over the entire specified VDD33

operating range.

Note 7: Specified VOUT error with AVP = 0% requires servo mode to be

set with MFR_PWM_MODE_LTC3882-1 command bit 6. Performance is

guaranteed by testing the LTC3882-1 in a feedback loop that servos VOUT

to a specified value.

Note 8: ADC tested with PWMs disabled. Comparable capability

demonstrated by in-circuit evaluations. Total Unadjusted Error includes all

gain and linearity errors, as well as offsets.

Note 9: Internal 32-bit calculations using 16-bit ADC results are limited to

10-bit resolution by PMBus Linear 11-bit data format.

Note 10: Limits guaranteed by TSNS voltage and current measurements

during test, including ADC readback.

Note 11: Data conversion is done in round robin fashion. All inputs signals

are continuously scanned in sequence resulting in a typical conversion

latency of 90ms.

Note 12: Guaranteed by design.

Note 13: Do not apply a voltage or current source directly to these pins.

They should only be connected to passive RC loads, otherwise permanent

damage may occur.

Note 14: Do not apply a voltage source to this pin unless shorted to VCC.

See Electrical Characteristics for applicable limits beyond which permanent

damage may occur.

LTC4449 Datasheet(PDF) 8 Page - Linear Technology

LTC4449 Datasheet(HTML) 8 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL