Preliminary Datasheet
LP3992
300mA,Ultra-low noise, Small Package
Ultra-Fast CMOS LDO Regulator
General Description
The LP3992 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The LP3992 performance is optimized
for battery-powered systems to deliver ultra low noise
and low quiescent current. The LP3992 also works
with low-ESR ceramic capacitors, reducing the amount
of board space necessary for power applications,
critical in hand-held wireless devices. The LP3992
consumes less than 0.01µA in shutdown mode and
has fast turn-on time less than 50µs. The other
features include ultra low dropout voltage, high output
accuracy, current limiting protection, and high ripple
rejection ratio. It is available in the 5-lead of SOT23-5
and TSOT23-5 packages.
Features
Ultra-Low-Noise for RF Application
2.5V- 5.5V Input Voltage Range
Low Dropout : 220mV @ 300mA
1.2V, 1.5V, 1.8V, 2.5V, 2.8V,3.0V,3.3V, 3.6V and
5V Fixed
300mA Output Current
High PSSR:-76dB at 1KHz
< 0.01uA Standby Current When Shutdown
Available in SOT23-5 and TSOT23-5 Package
TTL-Logic-Controlled Shutdown Input
Ultra-Fast Response in Line/Load transient
Current Limiting and Thermal Shutdown
Protection
Quick start-up (typically 50uS)
Order Information
LP3992
□ □ □ □ □
F: Pb-Free
Package Type
B3: SOT23-3
B5: SOT23-5
J5: TSOT23-5
Output Type
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
36: 3.6V
50: 5.0V
Applications
Portable Media Players/MP3 players
Cellular and Smart mobile phone
LCD
DSC Sensor
Wireless Card
Typical Application Circuit
LP3992-05
May.-2017
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 9
Preliminary Datasheet
Marking Information
Device
LP3992-12B5F
LP3992
Marking
LPS
1BYWX
Package
SOT23-3
SOT23-5
TSOT23-5
SOT23-3
SOT23-5
TSOT23-5
SOT23-3
SOT23-5
TSOT23-5
SOT23-3
SOT23-5
TSOT23-5
Shipping
3K/REEL
Device
LP3992-28B5F
Marking
LPS
1HYWX
Package
SOT23-3
SOT23-5
TSOT23-5
SOT23-3
SOT23-5
TSOT23-5
SOT23-3
SOT23-5
TSOT23-5
Shipping
3K/REEL
LP3992-15B5F
LPS
1NYWX
3K/REEL
LP3992-30B5F
LPS
1GYWX
3K/REEL
LP3992-18B5F
LPS
1CYWX
3K/REEL
LP3992-33B5F
LPS
1EYWX
3K/REEL
LP3992-25B5F
LPS
1DYWX
3K/REEL
Y: Y is year code. W: W is week code. X: X is series number.
Functional Pin Description
Package Type
Top View
Pin Configurations
Top View
TSOT23-5
SOT-23-5
SOT-23-3
VIN
1
5
VOUT
2
VOUT
GND
2
VIN
3
EN
3
4
NC
1
GND
TSOT23-5/SOT-23-5
SOT-23-3
Pin Description
Pin
SOT23-5
1
2
3
4
5
2
SOT23-3
3
1
Name
VIN
GND
EN
NC
VOUT
Description
Power Input Voltage.
Ground.
Chip Enable (Active High).
No Connection.
Output Voltage.
LP3992-05
May.-2017
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 2 of 9
Preliminary Datasheet
Function Diagram
LP3992
Absolute Maximum Ratings
Supply Input Voltage --------------------------------------------------------------------------------------------------- 6.5V
Other Pin Voltage ------------------------------------------------------------------------------------- -0.3V to VIN+0.3V
Power Dissipation, PD @ TA = 25°C
T/SOT23-5 ----------------------------------------------------------------------------------------------------------
500mW
SOT23-3 --------------------------------------------------------------------------------------------------------------- 500mW
Package Thermal Resistance
Thermal Resistance(SOT23-5/SOT23) (JA) --------------------------------------------------------------- 195℃/W
Thermal Resistance(SOT23-5/SOT23) (JC)
-----------------------------------------------------------------
60℃/W
Maximum Junction Temperature ---------------------------------------------------------------------------------- 150°C
Maximum Soldering Temperature (at leads, 10 sec) -------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------- −65°C to 165°C
ESD Susceptibility
HBM (Human Body Mode) --------------------------------------------------------------------------------------------- 2kV
MM(Machine-Mode) --------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
Supply Input Voltage ---------------------------------------------------------------------------------------- 2.5V to 5.5V
EN Input Voltage ------------------------------------------------------------------------------------------- 0V toVin+0.3V
Operation Junction Temperature Range ----------------------------------------------------------- −40°C to 125°C
Operation Ambient Temperature Range ------------------------------------------------------------ −40°C to 85°C
LP3992-05
May.-2017
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 3 of 9
Preliminary Datasheet
Electrical Characteristics
(LP3992-33B5F,VIN = VOUT + 1V, CIN = COUT = 1µF, TA = 25° C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Output Voltage
Output Loading Current
Current Limit
Quiescent Current
Dropout Voltage
Line Regulation
Load Regulation
Standby Current
EN Input Bias Current
Logic-Low
EN Threshold
Voltage
Logic-High
Voltage
Output Noise Voltage
Power Supply
Rejection Rate
f = 1kHz
f = 10kHz
TSD
Symbol
ΔVOUT
VOUT
I
LOAD
ILIM
IQ
VDROP
ΔVLINE
ΔLOAD
ISTBY
IIBSD
VIL
VIH
Test Conditions
IOUT = 1mA
IOUT = 1mA
VEN=VIN,VIN>2.5V
RLOAD = 1Ω
VEN ≥ 1.2V, IOUT = 0mA
IOUT = 200mA, VOUT > 2.8V
IOUT = 300mA, VOUT > 2.8V
VIN = (VOUT + 1V) to 5.5V,
IOUT = 50mA
1mA < IOUT < 300mA
VEN = GND, Shutdown
VEN = 3V
VIN = 3V to 5.5V, Shutdown
VIN = 3V to 5.5V, Start-Up
10Hz to 100kHz, IOUT =
200mA, COUT = 1µF
COUT = 1µF,
IOUT = 100mA
1.4
300
-76
−65
150
0.01
1.5
300
420
450
75
130
220
Min
−3
Typ.
--
3.33
LP3992
Max
+3
Units
%
V
mA
mA
130
200
300
0.2
2
1
3.5
0.4
VIN+
0.3
μA
mV
%/V
%/A
μA
μA
V
uVRMS
dB
°C
Thermal Shutdown Temperature
LP3992-05
May.-2017
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 9
Preliminary Datasheet
Typical Operating Characteristics
LP3992
LP3992-05
May.-2017
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 5 of 9
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