900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

UCC384-ADJ Datasheet Preview

UCC384-ADJ Datasheet

Low-Dropout 0.5-A Negative Linear Regulator

No Preview Available !

UCC284–5, UCC284–12, UCC284–ADJ, UCC384–5, UCC384–12, UCC384–ADJ
LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
D Precision Negative Series Pass Voltage
Regulation
D 0.2 V Dropout at 0.5 A
D Wide Input Voltage Range –3.2 V to –15 V
D Low Quiescent Current Irrespective of Load
D Simple Logic Shutdown Interfacing
D –5 V, –12 V, and Adjustable Output
D 2.5% Duty Cycle Short Circuit Protection
description
SLUS234D – JANUARY 2000 – REVISED FEBRUARY 2002
DP PACKAGE
(FRONT VIEW)
VOUTS 1
8 SD/CT
VIN 2
7 VIN
VIN 3
6 VIN
GND 4
5 VOUT
The UCC384-x family of negative linear-series pass regulators is tailored for low-dropout applications where
low-quiescent power is important. Fabricated with a BCDMOS technology ideally suited for low input-to-output
differential applications, the UCC384-x passes 0.5 A while requiring only 0.2 V of input-voltage headroom.
Dropout voltage decreases linearly with output current, so that dropout at 50 mA is less than 20 mV.
Quiescent current consumption for the device under normal (non-dropout) conditions is typically 200 µA. An
integrated charge pump is internally enabled only when the device is operating near dropout with low VIN. This
ensured that the device meets the dropout specifications even for maximum load current and a VIN of –3.2 V
with only a modest increase in quiescent current. Quiescent current is always less than 350 µA, with the charge
pump enabled. The quiescent current of the UCC384 does not increase with load current.
Short-circuit current is internally limited. The device responds to a sustained overcurrent condition by turning
off after a tON delay. The device then stays off for a period, tOFF, that is 40 times the tON delay. The device then
begins pulsing on and off at the tON/tOFF duty cycle of 2.5%. This drastically reduces the power dissipation during
short circuit such that heat sinking, if at all required, must only accommodate normal operation. An external
capacitor sets the on time. The off time is always 40 times tON.
The UCCx84-x can be shutdown to 45 µA (maximum) by pulling the SD/CT pin more positive than –0.7 V. To
allow for simpler interfacing, the SD/CT pin may be pulled up to 6 V above the ground pin without turning on
clamping diodes.
Internal power dissipation is further controlled with thermal-overload protection circuitry. Thermal shutdown
occurs if the junction temperature exceeds 140°C. The chip remains off until the temperature has dropped 20°C
(TJ = 120°C).
AVAILABLE OPTIONS
OUTPUT VOLTAGE (V)
PACKAGE DEVICES
TA TYP
(SOIC) DP
–5 UCC284DP–5
– 40°C to 85°C
–12
ADJ
UCC284DP–12
UCC284DP–ADJ
–5 UCC384DP–5
0°C to 70°C
–12
UCC384DP–12
ADJ UCC384DP–ADJ
All package types are available taped and reeled. Add TR suffix to device type
(e.g. UCC284DP–5TR) to order quantities of 3000 devices per reel.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2000, Texas Instruments Incorporated
1




etcTI

UCC384-ADJ Datasheet Preview

UCC384-ADJ Datasheet

Low-Dropout 0.5-A Negative Linear Regulator

No Preview Available !

UCC2845, UCC28412, UCC284ADJ, UCC3845, UCC38412, UCC384ADJ
LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
SLUS234D JANUARY 2000 REVISED FEBRUARY 2002
functional block diagram
1µA
DISCHARGE
0.7 V
+
50 k
SHUTDOWN 2.2 V
1.25 V
UCC384ADJ
UCC3845
UCC38412
R1 R2
0 OPEN
375K 125K
375K 43.6K
(+)
4 GND
R2
SD/CT 8
1.6 V
+
2.6 V +
SQ
RQ
TON
TOFF
40 µA
CHARGE
VIN 2
VIN 3
VIN 6
VIN 7
()
OVERCURRENT
700 mA
+
THERMAL
SHUTDOWN
UVLO
VPUMP
+
GM
R1
1 VOUTS
5 VOUT
()
UDG99030
absolute maximum ratings over operating free-air temperature (unless otherwise noted)Ĕ}
Input voltage range, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 V
Shutdown voltage range, SD/CT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V to 6 V
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 150°C
Storage temperature range Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead temperature (Soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
Stresses beyond those listed under absolute maximum ratingsmay 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 conditionsis 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 and negative out of the specified terminals.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number UCC384-ADJ
Description Low-Dropout 0.5-A Negative Linear Regulator
Maker etcTI
PDF Download

UCC384-ADJ Datasheet PDF






Similar Datasheet

1 UCC384-ADJ Low-Dropout 0.5-A Negative Linear Regulator
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy