LP38690-ADJ Datasheet, PDF (1/22 Pages) Texas Instruments – LP38692-ADJ 1A Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

LP38690-ADJ, LP38692-ADJ
www.ti.com
SNVS323H – DECEMBER 2004 – REVISED APRIL 2013
LP38690-ADJ
LP38692-ADJ 1A Low Dropout CMOS Linear Regulators with Adjustable Output
Stable with Ceramic Output Capacitors
Check for Samples: LP38690-ADJ, LP38692-ADJ
FEATURES
1
•2 Output Voltage Range of 1.25V - 9V
• 2.5% Adjust Pin Voltage Accuracy (25°C)
• Low Dropout Voltage: 450mV @ 1A (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 (LP38692-ADJ)
APPLICATIONS
• Hard Disk Drives
• Notebook Computers
• Battery Powered Devices
• Portable Instrumentation
DESCRIPTION
The LP38690/2-ADJ low dropout CMOS linear
regulators provide 2.5% precision reference voltage,
extremely low dropout voltage (450mV @ 1A 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: 450 mV (typ) @ 1A (typ. 5V out).
Ground Pin Current: 55 µA (typ) at full load.
Adjust Pin Voltage: 2.5% (25°C) accuracy.
Typical Application Circuits
V_IN
1 PF *
V_IN
V_OUT
LP38690
-ADJ
ADJ
GND
R2
V_OUT
R1
1 PF *
V_IN
V_EN
1 PF *
V_IN
V_OUT
LP38692
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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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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