Datasheet

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SLUS212E − NOVEMBER 1999 − REVISED FEBRUARY 2004
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
VIN 7.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage 1.2 V to −6.0 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction temperature −55°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (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.
AVAILABLE OPTIONS
(1)
PACKAGED DEVICES
T
J
TO-220 (T) TO−263 (TD)
(2)
T
J
OUTPUT VOLTAGE OUTPUT VOLTAGE
1.5 V 2.1 V 2.5 V 1.2 V or ADJ 1.5 V 2.1 V 2.5 V 1.2 V or ADJ
–40°C to 100°C 285T-1 285T-2 285T-3 285T-ADJ 285TD-1 285TD-2 285TD-3 285TD-ADJ
0°C to 100°C 385T-1 385T-2 385T-3 385T-ADJ 385TD-1 385TD-2 385TD-3 385TD-ADJ
1. For more package and ordering information, see the Package Option Addendum located at the end of this data sheet.
2. For 50 piece reel, add KTTT (e.g., UC285TDKTTT−1); for 500 piece reel, add TR (e.g., UC285TDTR−1).
electrical characteristics unless otherwise stated, these parameters apply for T
A
= −40°C to 100°C
for the UC285-x series and 0°C to 100°C for the UC385-x, VB = 5 V; VIN = 3.3 V, VOUT = 2.5 V, T
A
= T
J
.
PARAMETER TEST CONDITION MIN TYP MAX UNIT
UC385-3 Fixed 2.5 V, 5-A Family
Output voltage
UC385-3 I
VOUT
= 100 mA 2.475 2.5 2.525 V
Output voltage
UC285-3 I
VOUT
= 100 mA 2.45 2.5 2.525 V
Load regulation I
VOUT
= 10 mA to 5 A 0.5 4 mV
VIN PSRR 80 110 dB
VB PSRR 50 65 dB
VIN dropout voltage (VIN - VOUT)
I
VOUT
= 5 A, T
J
= 25°C 350 425 mV
VIN dropout voltage (VIN - VOUT)
UC385-3 I
VOUT
= 5 A 350 490 mV
UC285-3 I
VOUT
= 5 A 350 500 mV
VB dropout (VB - VOUT)
UC385-3 I
VOUT
= 5 A 1.8 2.1 V
VB dropout (VB - VOUT)
UC285-3 I
VOUT
= 5 A 1.8 2.2 V
Short circuit current limit 5.1 7.5 A
VB current
I
VOUT
= 10 mA 8 15 mA
VB current
I
VOUT
= 5 A 40 100 mA
VIN current I
VOUT
= 5 A 4.9 4.96 A
UC385-2 Fixed 2.1 V, 5-A Family
Output voltage
UC385-2 I
VOUT
= 100 mA 2.079 2.1 2.121 V
Output voltage
UC285-2 I
VOUT
= 100 mA 2.058 2.1 2.121 V
Load regulation I
VOUT
= 10 mA to 5 A 0.5 4 mV
VIN PSRR 80 110 dB
VB PSRR 50 67 dB