鈥?/div>
Precision 1% Reference
Over-Current Sense Threshold Accurate to
5%
Programmable Duty-Ratio Over-Current
Protection
D
D
D
D
D
D
D
D
4.5 V to 36 V Operation
100 mA Output Drive, Source or Sink
Under-Voltage Lockout
Adjustable Current Limit to Current Sense
Ratio
Separate +V
IN
terminal
Programmable Driver Current Limit
Access to VREF and E/A(+)
Logic-Level Disable Input
DW PACKAGE
(TOP VIEW)
鈥?Component qualification in accordance with JEDEC and industry
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life. Such qualification
testing should not be viewed as justifying use of this component
beyond specified performance and environmental limits.
+V
IN
Comp/Shutdown
E/A(+)
+2V REF
GND
Logic Disable
Limit
Source
NC = No Connect
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7
8
16
15
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9
Current Sense(+)
Current Sense(鈥?
Timer RC
NC
V
ADJ
NC
Sink
E/A(鈥?
description
The UC2832 series of precision linear regulators include all the control functions required in the design of very
low dropout linear regulators. Additionally, they feature an innovative duty-ratio current limiting technique which
provides peak load capability while limiting the average power dissipation of the external pass transistor during
fault conditions. When the load current reaches an accurately programmed threshold, a gated-astable timer is
enabled, which switches the regulator鈥檚 pass device off and on at an externally programmable duty-ratio. During
the on-time of the pass element, the output current is limited to a value slightly higher than the trip threshold
of the duty-ratio timer. The constant-current-limit is programmable on the UC2832 to allow higher peak current
during the on-time of the pass device. With duty-ratio control, high initial load demands and short circuit
protection may both be accommodated without extra heat sinking or foldback current limiting. Additionally, if the
timer pin is grounded, the duty-ratio timer is disabled, and the IC operates in constant-voltage/constant-current
regulating mode.
These IC鈥檚 include a 2 Volt (鹵1%) reference, error amplifier, UVLO, and a high current driver that has both source
and sink outputs, allowing the use of either NPN or PNP external pass transistors. Safe operation is assured
by the inclusion of under-voltage lockout (UVLO) and thermal shutdown.
ORDERING INFORMATION
鈥?/div>
TA
鈥?0擄C to 105擄C
PACKAGE摟
SOP 鈥?DW
Tape and reel
ORDERABLE
PART NUMBER
UC2832TDWREP
TOP-SIDE
MARKING
UC2832TEP
鈥?0擄C to 105擄C
SOP 鈥?DW
Tube
UC2832TDWEP
UC2832TEP
鈥?Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
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