Datasheet

LM2677
www.ti.com SNVS077I –MAY 2004–REVISED JUNE 2012
Absolute Maximum Ratings
(1)(2)
Input Supply Voltage 45V
ON/OFF Pin Voltage −0.1V to 6V
Switch Voltage to Ground
(3)
−1V to V
IN
Boost Pin Voltage V
SW
+ 8V
Feedback Pin Voltage −0.3V to 14V
Power Dissipation Internally Limited
ESD
(4)
2 kV
Storage Temperature Range −65°C to 150°C
Soldering Temperature Wave 4 sec, 260°C
Infrared 10 sec, 240°C
Vapor Phase 75 sec, 219°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions under
which of the device is ensured. Operating Ratings do not imply ensured performance limits. For ensured performance limits and
associated test condition, see the electrical Characteristics tables.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The absolute maximum specification of the 'Switch Voltage to Ground' applies to DC voltage. An extended negative voltage limit of -10V
applies to a pulse of up to 20 ns, -6V of 60 ns and -3V of up to 100 ns.
(4) ESD was applied using the human-body model, a 100pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Operating Ratings
Supply Voltage 8V to 40V
Junction Temperature Range (T
J
) −40°C to 125°C
LM2677-3.3 Electrical Characteristics
Limits appearing in bold type face apply over the entire junction temperature range of operation, −40°C to 125°C.
Specifications appearing in normal type apply for T
A
= T
J
= 25°C. Sync pin open circuited.
Symbol Parameter Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 8V to 40V, 100mA ≤ I
OUT
≤ 5A 3.3 3.234 3.366 V
3.201 3.399
η Efficiency V
IN
= 12V, I
LOAD
= 5A 82 %
(1) Typical values are determined with T
A
= T
J
= 25°C and represent the most likely norm.
(2) All limits are specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature
limits are 100% tested during production with T
A
= T
J
= 25°C. All limits at temperature extremes are guaranteed via correlation using
standard standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
LM2677-5.0 Electrical Characteristics
Symbol Parameter Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 8V to 40V, 100mA ≤ I
OUT
≤ 5A 5.0 4.900 5.100 V
4.850 5.150
η Efficiency V
IN
= 12V, I
LOAD
= 5A 84 %
(1) Typical values are determined with T
A
= T
J
= 25°C and represent the most likely norm.
(2) All limits are specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature
limits are 100% tested during production with T
A
= T
J
= 25°C. All limits at temperature extremes are guaranteed via correlation using
standard standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
LM2677-12 Electrical Characteristics
Symbol Parameter Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 15V to 40V, 100mA ≤ I
OUT
≤ 5A 12 11.76 12.24 V
11.64 12.36
η Efficiency V
IN
= 24V, I
LOAD
= 5A 92 %
(1) Typical values are determined with T
A
= T
J
= 25°C and represent the most likely norm.
(2) All limits are specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature
limits are 100% tested during production with T
A
= T
J
= 25°C. All limits at temperature extremes are guaranteed via correlation using
standard standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
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