LP5922 Datasheet, PDF (1/24 Pages) Texas Instruments – 2-A Low-Noise, Adjustable LDO With Low Input- and Output-Voltage Capability

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LP5922
SNVSAG0 – NOVEMBER 2016
LP5922 2-A Low-Noise, Adjustable LDO With Low Input- and Output-Voltage Capability
1 Features
•1 Wide Input Voltage Range: 1.3 V to 6 V
• Low V_IN Voltage Without Extra Bias Voltage
• Adjustable Output Voltage: 0.5 V to 5 V
• Low Dropout: 200 mV at 2-A Load
• Low Output Voltage Noise: 25 μV_RMS
• Output Current: 2 A
• –40˚C to +125°C Operating Junction Temperature
• Programmable Soft Start Limits Inrush Current
• 3-mm × 3-mm × 0.75-mm 10-Pin WSON Package
• Thermal-Overload and Short-Circuit Protection
• Output Voltage Tolerance: ±1.5%
• Shutdown Supply Current : 0.1 μA
• PSRR: 70 dB at 1 kHz
• Power Good Output
2 Applications
• Space-Constrained Applications
• Noise- and Ripple-Sensitive High Current Analog
or RF Systems
• Target Sectors
– Medical, Test and Measurement Equipment
– Portable and Consumer electronics
– Telecom and Networking Cards
– Wireless Infrastructure
– Industrial Applications
• Typical Systems
– Radio Transceivers, Power Amplifiers,
PLL/Synthesizer, Clocking, VCO, GPRS, 3G
Modules, FPGAs, DSP, GPUs, and others
Simplified Schematic
V_IN
2.5 V
IN
OUT
IN
OUT
LP5922
V_IN
FB
V_OUT
1.8 V
3 Description
The LP5922 is 2-A low dropout (LDO) linear regulator
with 200-mV typical dropout voltage at maximum
current levels. The LP5922 device can operate from a
voltage rail down to 1.3 V without additional bias
supply. System efficiency is maximized and power
dissipation minimized by the low dropout and low V_IN
capability. The device also features low quiescent
current and very low shutdown current.
The LP5922 device was designed to have high PSRR
and low output noise to support sensitive analog
applications without additional filtering. The output
noise can be reduced even further by implementing a
small capacitor on the SS/NR pin.
The output voltage is adjustable from 0.5 V to 5 V by
an external resistor divider. Enable pin, adjustable
soft start and optional Power Good features help with
system power sequencing. Inrush current is
controlled with the soft start and the device has short
circuit and thermal protections.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP5922
WSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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PSRR
0
-20
-40
PG
GND
-60
EN
SS/NR
Copyright © 2016, Texas Instruments Incorporated
-80
-100
10 20 100
I_OUT = 1 mA
I_OUT = 1 A
I_OUT = 2 A
1000 10000 100000 1000000 1E+7
Frequency (Hz)
D014
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.