LP38693SD-ADJ Datasheet, PDF (1/22 Pages) Texas Instruments – LP38693-ADJ 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

LP38691-ADJ, LP38693-ADJ
www.ti.com
SNVS324I – JANUARY 2005 – REVISED APRIL 2013
LP38691-ADJ
LP38693-ADJ 500mA Low Dropout CMOS Linear Regulators with Adjustable Output
Stable with Ceramic Output Capacitors
Check for Samples: LP38691-ADJ, LP38693-ADJ
FEATURES
1
•2 All WSON Options are Available as AEC-Q100
Grade 1
• Output Voltage Range of 1.25V - 9V
• 2.0% Adjust Pin Voltage Accuracy (25°C)
• Low Dropout Voltage: 250mV @ 500mA (typ,
5V out)
• Wide Input Voltage Range (2.7V to 10V)
• Precision (Trimmed) Bandgap Reference
• Ensured Specs for -40°C to +125°C
• 1µA Off-State Quiescent Current
• Thermal Overload Protection
• Foldback Current Limiting
• SOT-223 and 6-Lead WSON Packages
• Enable Pin (LP38693-ADJ)
APPLICATIONS
• Hard Disk Drives
• Notebook Computers
• Battery Powered Devices
• Portable Instrumentation
DESCRIPTION
The LP38691/3-ADJ low dropout CMOS linear
regulators provide 2.0% precision reference voltage,
extremely low dropout voltage (250mV @ 500mA
load current, V_OUT = 5V) and excellent AC
performance utilizing ultra low 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: 250 mV (typ) @ 500mA (typ. 5V
out).
Ground Pin Current: 55 µA (typ) at full load.
Adjust Pin Voltage: 2.0% (25°C) accuracy.
Typical Application Circuits
V_IN
1 PF *
V_IN
V_OUT
LP38691
-ADJ
ADJ
GND
R2
V_OUT
R1
1 PF *
V_IN
V_EN
1 PF *
V_IN
V_OUT
LP38693
V_{EN -ADJ}
ADJ
GND
R2
V_OUT
R1
1 PF *
V_OUT = V_ADJ x (1 + R1/R2)
*Minimum value required for stability.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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