Preliminary Datasheet
LP3987H
600mA,Ultra-low noise, Ultra-Fast CMOS LDO Regulator
General Description
The LP3987H is designed for portable RF and wireless
applications with demanding performance and space
requirements. The LP3987H performance is optimized
for battery-powered systems to deliver ultra low noise
and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging
the battery life. The LP3987H also works with low-ESR
ceramic capacitors, reducing the amount of board
space necessary for power applications, critical in
hand-held wireless devices. The LP3987H consumes
less than 0.01µA in shutdown mode and has fast
turn-on time less than 20µs. 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
packages.
ON
OFF
VIN
Cin
GND
NC
VIN
VOUT
Cout
VOUT
Features
Ultra-Low-Noise for RF Application
2.5V- 6.5V Input Voltage Range
Low Dropout : 400mV @ 500mA
High PSSR:-80dB at 1KHz
< 0.01uA Standby Current When Shutdown
TTL-Logic-Controlled Shutdown Input
Ultra-Fast Response in Line/Load transient
Current Limiting and Thermal Shutdown
Protection
Quick start-up (typically 20uS)
Typical Application Circuit
EN
Ordering Information
LP3987H
□ □
□ □
□
Applications
F: Pb-Free
Portable Media Players/MP3 players
Cellular and Smart mobile phone
Sensor Module
RF Module
Package Type
B5: SOT23-5
Output Voltage Type
Pin Configurations
VIN
1
5
VOUT
12: 1.2V
15: 1.5V
18:
1.8V
GND
2
Top View
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
EN
3
4
NC
SOT-23-5
Marking Information
Device
LP3987H
Marking
Package
SOT23-5
Shipping
3K/REEL
LP3987H – 02
Version 1.2
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 9
Preliminary Datasheet
Absolute Maximum Ratings
LP3987H
Supply Input Voltage----------------------------------------------------------------------------------------------------------6V
Power Dissipation, PD @ TA = 25°C
SOT23-5 ------------------------------------------------------------------------------------------------------------------455mW
Package Thermal Resistance
SOT23-5, θJA ----------------------------------------------------------------------------------------------------------250°C/W
Lead Temperature (Soldering, 10 sec.) -----------------------------------------------------------------------------260°C
Storage Temperature Range ----------------------------------------------------------------------------- −65°C to 150°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 to 5.5V
Operation Junction Temperature Range ------------------------------------------------------------- −40°C to 125°C
Operation Ambient Temperature Range--------------------------------------------------------------- −40°C to 85°C
LP3987H – 02
Version 1.2
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 3 of 9
Preliminary Datasheet
Electrical Characteristics
(VIN = VOUT + 1V, Cin = Cout = 1µF, TA = 25° C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Output 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
T
SD
PSRR
Cout = 1µF,
I
OUT
= 10mA
V
IH
Symbol
ΔV
OUT
Iout
I
LIM
I
Q
V
DROP
ΔV
LINE
ΔLOAD
I
STBY
I
IBSD
V
IL
Test Conditions
I
OUT
= 1mA
VEN=VIN, VIN>2.5V
R
LOAD
= 1Ω
VEN≥1.4V,Output floating
I
OUT
=100mA,VOUT> 2.8V
I
OUT
=300mA,VOUT> 2.8V
VIN=(VOUT+1V) to 5.5V,
I
OUT
= 1mA
1mA < I
OUT
< 300mA
VEN = GND, Shutdown
VEN = GND or VIN
VIN = 3V to 5.5V,
Shutdown
VIN = 3V to 5.5V,
Start-Up
10Hz to 100kHz,
I
OUT
=200mA, Cout=1µF
1.4
100
-80
-68
165
0.01
0
Min
−2
Typ.
--
600
800
90
50
150
130
68
200
0.2
0.2
1
100
0.4
Max
+2
LP3987H
Units
%
mA
mA
μA
mV
%
%
μA
nA
V
uVRMS
dB
°C
Thermal Shutdown Temperature
LP3987H – 02
Version 1.2
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 9
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