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UCC2540 Datasheet(PDF) 3 Page - Texas Instruments

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Part No. UCC2540
Description  HIGH EFFICIENCY SECONDARY SIDE SYNCHRONOUS BUCK PWM CONTROLLER
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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UCC2540 Datasheet(HTML) 3 Page - Texas Instruments

 
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UCC2540
SLUS539A − JUNE 2004 − REVISED AUGUST 2004
3
www.ti.com
ORDERING INFORMATION
TA = TJ
HTSSOP−20 (PWP)(1)
TA = TJ
Bulk
−40
°C to +105°C
UCC2540PWP
(1) The PWP package is also available at 70 devices per tube and taped and reeled at
2,000 devices per reel. Add an R suffix to the device type (i.e., UCC2540PWPR). See
the application section of the data sheet for PowerPAD drawing and layout information.
CONNECTION DIAGRAM
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RSET
REF
G2C
SYNCIN
RAMP
GND
VEA−
CEA−
COMP
TR
SWS
BST
G1
SW
VDD
PGND
G2
VDRV
G2S
SS
PWP PACKAGE
(TOP VIEW)
NOTE: The PowerPAD
t is not directly connected to any lead of the package. It is electrically and thermally connected to the substrate of the
device which acts as ground and should be connected to PGND on the PCB. The exposed dimension is 1.3 mm x 1.7 mm. However, the
tolerances can be +1.05 mm / −0.05 mm (+41 mils / −2 mils) due to position and mold flow variation.
THERMAL INFORMATION
PACKAGE
FAMILY
PACKAGE
DESIGNATOR
θJA (°C/W)
(with PowerPAD)
θJC (°C/W)
(without PowerPAD)
θJC (°C/W)
(with PowerPAD)
MAXIMUM DIE
TEMPERATURE
PowerPAD
HTSSOP−20
PWP
22.3 to 32.6
(500 to 0 LFM)
19.9
1.4
125
°C


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