UCC386_08 Datasheet, PDF (1/9 Pages) Texas Instruments – LOW-DROPOUT 200mA LINEAR REGULATOR

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UCC386, UCC387, UCC388
LOWĆDROPOUT 200ĆmA LINEAR REGULATOR
D Precision Positive Linear Voltage Regulator
D 0.2 V Dropout at 200 mA
D Ensured Reverse Input/Output Voltage
Isolation with Low Leakage
D Adjustable Output Voltage (Down to 1.25 V)
D Load Independent Low Quiescent Current
(10 A typical)
D Load Regulation of 5 mV from 0 mA to
200 mA
D Logic Shutdown Capability
D Shutdown Quiescent Current Below 2 A
D Short Circuit Protection - Duty Cycle
Limiting
D Remote Load Voltage Sense for Accurate
Load Regulation
SLUS377B - JULY 1999 - REVISED MAY 2000
SOIC
DP PACKAGES
(TOP VIEW)
VOUT
1
8
VIN
GND
2
7
GND
GND
3
6
GND
VSENSE
4
5
OFFB
TSSOP
PW PACKAGES
(TOP VIEW)
VIN
1
8
OFFB
N/C
2
7
N/C
N/C
3
6
VSENSE
VOUT
4
5
GND
description
The UCC386/7/8 positive linear pass regulator series is tailored for low-dropout applications where extremely
low quiescent power is required. Fabricated with BiCMOS technology ideally suited for low input to output
differential applications, the UCC386/7/8 will pass 200 mA while requiring only 200 mV of input voltage
headroom. Quiescent current is typically less than 10 µA. To prevent reverse current conduction, on-chip
circuitry limits the minimum forward voltage to 50 mV typical. Once the forward voltage limit is reached, the
input-output differential voltage is maintained as the input voltage drops until undervoltage lockout disables the
regulator.
block diagram and application circuit
SWITCH CONTROL
LOAD
R1
UCC386 1.025 m
UCC387 1.875 m
UCC388 0
R2
625 k
625 k
OPEN
RS1
RS2
VOUT
1
VIN
8
+
+
GND
2
–
+ _{1.25 V}
GND
3
OVERCURRENT,
HICCUP CONTROL
& THERMAL
VSENSE
R1
R2
4
SHUTDOWN
GND
7
GND
6
OFFB
5
UCC388 ONLY
FROM OPEN DRAIN
SHUTDOWN COMMAND
UDG-98087
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.
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Copyright © 2000, Texas Instruments Incorporated
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