LP3987-1.5B3A POWER [Lowpower Semiconductor inc], LP3987-1.5B3A Datasheet

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LP3987-1.5B3A

Manufacturer Part Number
LP3987-1.5B3A
Description
300mA,Ultra-LowNoise Ultra-fast CMOS LDO Regrlator
Manufacturer
POWER [Lowpower Semiconductor inc]
Datasheet
General Description
The LP3987 is designed for portable RF and
wireless applications with demanding performance
and space requirements. The LP3987 performance
is optimized for battery-powered systems to deliver
ultra low noise and low quiescent current. A noise
bypass pin is available for further reduction of
output noise. Regulator ground current increases
only slightly in dropout, further prolonging the
battery life. The LP3987 also works with low-ESR
ceramic capacitors, reducing the amount of board
space necessary for power applications, critical in
hand-held wireless devices. The LP3987 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. Available in the 5-lead of
SOT-23 packages.
Pin Configurations
Typical Application Circuit
LP3987-datasheet Oct.-2003
SOT-23-5
300mA,Ultra-LowNoise
SOT-23
Ultra-fast CMOS LDO Regrlator
Features
Applications
Ordering Information
SOT23-5(B5) Type:
Type
Voltage(V) 1.5 1.8 2.5 2.7 2.8 2.85 3.0 3.3
SOT23 (B3) Type:
Type
Voltage(V) 1.5 1.8 2.0 2.1 2.5 2.8
Note:
1.
2. 2.85V output order is LP3987-HB5F.
1-1
Output Voltage range from 1.5V to 3.3V;
Ultra-Low-Noise for RF Application
2.5V- 6V Input Voltage Range
Low Dropout : 220mV @ 300mA
High PSSR:-80dB at 1KHz
< 0.01 A Standby Current When
Shutdown
TTL-Logic-Controlled Shutdown Input
Custom Voltage Available
Ultra-Fast Response in Line/Load
Transient
Quick Start-Up (Typically 50 s)
Current Limiting and Thermal Shutdown
Protection
PMP/PDA/MP3 players
Cellular and Mobile phone
RF Module
Sensor Module
LP3987 - □□ □ □□
A
A
B
B
C
C
D
D
Output Voltage:
Package Type
B5: SOT-23-5
B3: SOT-23
LP3987
F:PB-Free
E
E
H
H
F
F
3.0 3.3
G
G

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LP3987-1.5B3A Summary of contents

Page 1

... General Description The LP3987 is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3987 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life ...

Page 2

... 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 LP3987-datasheet Oct.-2003 2-2 LP3987 ...

Page 3

... Line Regulation Load Regulation Standby Current EN Input Bias Current Logic-Low Voltage EN Threshold Logic-High Voltage Output Noise Voltage Power Supply f = 100Hz f = Rejection Rate 10kHz Thermal Shutdown Temperature LP3987-datasheet Oct.-2003 Symbol Test Conditions I = 1mA ΔV OUT OUT 1Ω LIM LOAD ≥ ...

Page 4

... Typical Operating Characteristics LP3987-datasheet Oct.-2003 4-4 LP3987 ...

Page 5

... LP3987-datasheet Oct.-2003 5-5 LP3987 ...

Page 6

... ESR is > 25mΩ on the LP3987 output ensures stability. The LP3987 still works well with output capacitor of other types due to the wide stable ESR range. Figure 1 shows the curves of allowable ESR range as a function of load current for various output capacitor values ...

Page 7

... TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating specification of LP3987, where TJ(MAX) is the maximum junction temperature of the die (125°C) LP3987-datasheet Oct.-2003 and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for SOT-23-5 package is 250° ...

Page 8

... Package Information LP3987-datasheet Oct.-2003 8-8 LP3987 ...

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