SLUS872 – JANUARY 2009...............................................................................................................................................................................................
www.ti.com
ORDERING INFORMATION
(1)
T
A
–55°C to 125°C
(1)
(2)
PACKAGE
(2)
CDIP – JG
ORDERABLE PART NUMBER
5962-8670409VPA
TOP-SIDE MARKING
UC1843A-SP
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at
www.ti.com.
Package drawings, thermal data, and symbolization are available at
www.ti.com/packaging.
ABSOLUTE MAXIMUM RATINGS
(1) (2)
over operating free-air temperature range (unless otherwise noted)
V
CC
I
O
V
I
P
D
T
stg
T
lead
(1)
(2)
Supply voltage, low-impedance source
Supply current
Output current
Output energy (capacitive load)
Input voltage (V
FB
, I
SENSE
)
Error amplifier output sink current
Power dissipation (T
A
= 25°C)
Storage temperature range
Lead temperature (soldering, 10 seconds)
30 V
Self limiting
±1 A
5
µJ
–0.3 V to 6.3 V
10 mA
1W
–65°C to 150°C
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 ground. Currents are positive into, negative out of the specified terminal.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (T
A
= T
J
= –55°C to 125°C), unless otherwise noted.
MIN
V
CC
Supply voltage
Sink/source output current (continuous or time average)
SLUS872 – JANUARY 2009...............................................................................................................................................................................................
www.ti.com
APPLICATION INFORMATION
Amp can Source and Sink up to 0.5mA, and Sink up to 2mA.
Figure 1. Error Amplifier Configuration
During UVLO, the Output is low.
Figure 2. Undervoltage Lockout
Peak Current (I
S
) is Determined By The Formula
1.0V
I
SMAX
′
RS
A small RC filter may be required to suppress switch transients.
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