LP3990_15 Datasheet, PDF (1/28 Pages) Texas Instruments – LP3990 150-mA Linear Voltage Regulator for Digital Applications

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LP3990
SNVS251J – MAY 2004 – REVISED SEPTEMBER 2014
LP3990 150-mA Linear Voltage Regulator for Digital Applications
1 Features
•1 1% Voltage Accuracy at Room Temperature
• Stable with Ceramic Capacitor
• Logic Controlled Enable
• No Noise Bypass Capacitor Required
• Thermal-Overload and Short-Circuit Protection
• Input Voltage Range, 2 V to 6 V
• Output Voltage Range, 0.8 V to 3.3 V
• Output Current, 150 mA
• Output Stable - Capacitors, 1 µF
• Virtually Zero I_Q (Disabled), < 10 nA
• Very Low I_Q (Enabled), 43 µA
• Low Output Noise, 150 µV_RMS
• PSRR, 55 dB at 1 kHz
• Fast Start-Up, 105 µs
2 Applications
• Cellular Handsets
• Hand-Held Information Appliances
3 Description
The LP3990 regulator is designed to meet the
requirements of portable, battery-powered systems
providing an accurate output voltage, low-noise, and
low-quiescent current. The LP3990 will provide a 0.8-
V output from the low input voltage of 2 V at up to a
150-mA load current. When switched into shutdown
mode via a logic signal at the enable pin (EN), the
power consumption is reduced to virtually zero.
The LP3990 is designed to be stable with space-
saving ceramic capacitors with values as low as 1 µF.
Performance is specified for a –40°C to 125°C
junction temperature range.
For output voltages other than 0.8 V, 1.2 V, 1.35 V,
1.5 V, 1.8 V, 2.5 V, 2.8 V, or 3.3 V, please contact
the Texas Instruments sales office.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
DSBGA (4) 1.324 mm x 1.045 mm (MAX)
LP3990
WSON (6)
2.90 mm x 1.60 mm
SOT-23 (5) 3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
V_IN
IN
OUT
V_OUT
V_EN
GND
C_IN
1 µF
ON
OFF
LP3990
EN
GND
C_OUT
1 µF
GND
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.