LP38690-ADJ_16 Datasheet, PDF (1/27 Pages) Texas Instruments – 1-A Low Dropout CMOS Linear Regulator

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LP38690-ADJ, LP38692-ADJ
SNVS323I – DECEMBER 2004 – REVISED FEBRUARY 2016
LP3869x-ADJ 1-A Low Dropout CMOS Linear Regulator With Adjustable Output -
Stable With Ceramic Output Capacitors
1 Features
•1 Input Voltage Range: 2.7 V to 10 V
• Output Voltage Range: 1.25 V to 9 V
• 2.5% Adjust Pin Voltage Accuracy (25°C)
• Low Dropout Voltage: 450 mV at 1 A (5-V Typical
V_OUT)
• Precision (Trimmed) Bandgap Reference
• Ensured Specs for –40°C to +125°C
• 1-µA Off-State Quiescent Current
• Thermal Overload Protection
• Foldback Current Limiting
• Enable (EN) Pin (LP38692-ADJ)
• 5-Pin SOT-223 and 6-Pin WSON Packages
2 Applications
• Hard Disk Drives
• Notebook Computers
• Battery-Powered Devices
• Portable Instrumentation
3 Description
The LP38690-ADJ and LP38692-ADJ low dropout
CMOS linear regulators provide 2.5% precision
reference voltage, extremely low dropout voltage
(450 mV at 1-A load current, V_OUT = 5 V) and
excellent AC performance utilizing ultralow equivalent
series resistance (ESR) ceramic output capacitors.
The low thermal resistance of the WSON and SOT-
223 packages allow the full operating current to be
used even in high ambient temperature
environments.
The use of a PMOS power transistor means that no
DC base drive current is required to bias it allowing
ground pin current to remain below 100 µA
regardless of load current, input voltage, or operating
temperature.
• Dropout Voltage: 450 mV (typical) at 1 A (typical
5-V out)
• Ground Pin Current: 55 µA (typical) at full load
• Adjust Pin Voltage: 2.5% (25°C) accuracy
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP38690-ADJ
LP38692-ADJ
WSON (6)
3.00 mm × 3.00 mm
LP38692-ADJ
SOT-223 (5)
6.50 mm × 3.56 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic LP38690-ADJ
V_IN
V_OUT
IN
OUT
LP38690
-ADJ
R1
GND ^ADJ
R2
Simplified Schematic LP38692-ADJ
V_IN
V_OUT
IN
OUT
LP38692
V_EN
EN _-ADJ
ADJ
R1
GND
R2
V_OUT = V_ADJ × (1 + R1/R2)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.