Datasheet

LM2678
www.ti.com SNVS029I –MARCH 2000–REVISED APRIL 2013
Operating Ratings
Supply Voltage 8V to 40V
Junction Temperature Range (T
J
) −40°C to 125°C
Electrical Characteristics
LM2678-3.3
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.
Parameter Test Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 8V to 40V, 100mA ≤ I
OUT
≤ 5A 3.3 3.234/3.201 3.366/3.399 V
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 ensured 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 ensured via correlation using
standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
LM2678-5.0
Parameter Test Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 8V to 40V, 100mA ≤ I
OUT
≤ 5A 5.0 4.900/4.850 5.100/5.150 V
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 ensured 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 ensured via correlation using
standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
LM2678-12
Parameter Test Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
OUT
Output Voltage V
IN
= 15V to 40V, 100mA ≤ I
OUT
≤ 5A 12 11.76/11.64 12.24/12.36 V
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 ensured 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 ensured via correlation using
standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
LM2678-ADJ
Parameter Test Conditions Typ
(1)
Min
(2)
Max
(2)
Units
V
FB
Feedback Voltage V
IN
= 8V to 40V, 100mA ≤ I
OUT
≤ 5A
1.21 1.186/1.174 1.234/1.246 V
V
OUT
Programmed for 5V
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 ensured 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 ensured via correlation using
standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
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