LP38691-ADJ_16 Datasheet, PDF (1/27 Pages) Texas Instruments – 500-mA Low-Dropout CMOS Linear Regulators Stable

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LP38691-ADJ, LP38693-ADJ, LP38691-ADJ-Q1, LP38693-ADJ-Q1
SNVS324K – JANUARY 2005 – REVISED JANUARY 2016
LP3869x-ADJ/Q1 500-mA Low-Dropout CMOS Linear Regulators
Stable With Ceramic Output Capacitors
1 Features
•1 Wide Input Voltage Range: 2.7 V to 10 V
• All WSON Options are Available as AEC-Q100
Grade 1
• Output Voltage Range: 1.25 V to 9 V
• 2% Adjust (ADJ) Pin Voltage Accuracy (25°C)
• Low Dropout Voltage: 250 mV at 500 mA
(Typical, 5-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
• Ground (GND) Pin Current: 55 µA (Typical) at Full
Load
• Enable (EN) Pin (LP38693-ADJ)
2 Applications
• Hard Disk Drives
• Notebook Computers
• Battery-Powered Devices
• Portable Instrumentation
3 Description
The LP3869x-ADJ low-dropout CMOS linear
regulators provide 2% precision reference voltage,
extremely low dropout voltage (250 mV at 500-mA
load current, V_OUT = 5 V), and excellent AC
performance using ultra-low equivalent series
resistance (ESR) ceramic output capacitors.
The low thermal resistance of the WSON and SOT-
223 packages allow use of the full operating current
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, thus
allowing the GND-pin current to remain below 100 µA
regardless of load current, input voltage, or operating
temperature.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP38691-ADJ
WSON (6)
3.00 mm × 3.00 mm
LP38693-ADJ
SOT-223 (5)
WSON (6)
6.50 mm × 3.56 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuits
V_IN
1 PF *
IN
OUT
LP38691
-ADJ
ADJ
GND
R2
V_OUT
R1
1 PF *
V_IN
V_EN
1 PF *
IN
OUT
LP38693
EN _-ADJ
ADJ
GND
R2
V_OUT
R1
1 PF *
V_OUT = V_ADJ × (1 + R1/R2)
* Minimum value required for stability
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.