SLUS495H − SEPTEMBER 2001 − REVISED AUGUST 2007
UCC29002
UCC29002/1
UCC39002
DESCRIPTION (continued)
The functionality of the UCC29002/1 differs slightly compared to the UCC39002. The UCC39002 will force the
maximum adjustment range at start up to quickly engage load sharing; the UCC29002/1 ADJ amplifier will
operate in a linear mode during start up, resulting in a more gradual load sharing at turn on.
During transient conditions while adding or removing power supplies, the UCC39002 protects the system by
keeping the load share bus disconnected from the remaining supplies. By disabling the adjust function in case
a short of the load share bus occurs to either GND or the supply rail, it also provides protection for the system
against erroneous output voltage adjustment.
The UCC39002 also meets Intel’s SSI (Server System Infrastructure) loadshare specifications of a single-line
load share bus and scalable load share voltage for any level of output currents.
The UCC39002 family is offered in 8-pin MSOP (DGK), SOIC (D), and PDIP (P) packages.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
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Supply voltage, current limited (V
DD
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 15 V
Supply voltage, voltage source (V
DD
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 13.5 V
Input voltage, current sense amplifier (V
CS+
, V
CS−
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V
DD
+ 0.3 V
Current sense amplifier output voltage (V
CSO
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V
DD
Load share bus voltage (V
LS
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V
DD
Supply current (I
DD
+ I
ZENER
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Adjust pin input voltage (V
ADJ
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
EAO
+1 V < V
ADJ
≤
V
DD
Adjust pin sink current (I
ADJ
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 mA
Operating junction temperature range, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C
Storage temperature range T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Lead Temperature, T
sol
(Soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
§ All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal.
SOIC (D) OR MSOP (DGK) PACKAGE
(TOP VIEW)
PDIP (P) PACKAGE
(TOP VIEW)
CS−
CS+
VDD
GND
1
2
3
4
8
7
6
5
CSO
LS
EAO
ADJ
CS−
CS+
VDD
GND
1
2
3
4
8
7
6
5
CSO
LS
EAO
ADJ
AVAILABLE OPTIONS
PACKAGED DEVICES
TA = TJ
SOIC−8
(D)
†
UCC29002D
−40°C to 105°C
UCC29002D/1
MSOP−8
(DGK)
†
UCC29002DGK
UCC29002DGK/1
PDIP−8
(P)
UCC29002P
NA
0°C to 70°C
UCC39002D
UCC39002DGK
UCC39002P
† The D and DGK packages are available taped and reeled. Add R suffix to device type (e.g.
UCC39002DR) to order quantities of 2,500 devices per reel.
2
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