LP38512-1.8 반도체 회로 부품 판매점
1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator
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 National Semiconductor |
May 14, 2008
LP38512-1.8
1.5A Fast-Transient Response Low-Dropout Linear
Voltage Regulator with Error Flag
General Description
The LP38512-1.8 Fast-Transient Response Low-Dropout
Voltage Regulator offers the highest-performance in meeting
AC and DC accuracy requirements for powering Digital
Cores. The LP38512-1.8 uses a proprietary control loop that
enables extremely fast response to change in line conditions
and load demands. Output Voltage DC accuracy is guaran-
teed at 2.5% over line, load and full temperature range from
-40°C to +125°C. The LP38512-1.8 is designed for inputs
from the 2.5V, 3.3V, and 5.0V rail, is stable with 10 μF ceramic
capacitors, and has a fixed 1.8V output. An Error Flag feature
monitors the output voltage and notifies the system processor
when the output voltage falls more than 15% below the nom-
inal value. The LP38512-1.8 provides excellent transient per-
formance to meet the demand of high performance digital
core ASICs, DSPs, and FPGAs found in highly-intensive ap-
plications such as servers, routers/switches, and base sta-
tions.
Features
■ 2.25V to 5.5V Input Voltage Range
■ 1.8V Fixed Output Voltage
■ 1.5A Output Load Current
■ ±2.5% Accuracy over Line, Load, and Full-Temperature
Range from -40°C to +125°C
■ Stable with tiny 10 µF ceramic capacitors
■ 0.20% Output Voltage Load Regulation from 10 mA to
1.5A
■ Enable pin
■ Error Flag Indicates Status of Output Voltage
■ 1uA of Quiescent current in Shutdown
■ 40dB of PSRR at 100 kHz
■ Over-Temperature and Over-Current Protection
■ TO-263 and TO-263 THIN Surface Mount Packages
Applications
■ Digital Core ASICs, FPGAs, and DSPs
■ Servers
■ Routers and Switches
■ Base Stations
■ Storage Area Networks
■ DDR2 Memory
Typical Application Circuit
20183001
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Ordering Information
TABLE 1. Package Marking and Ordering Information
Output
Voltage
1.8
Order Number
LP38512TJ-1.8
LP38512TJX-1.8
LP38512TS-1.8
LP38512TSX-1.8
Package Type
TO263-5 THIN
TO263-5 THIN
TO263-5
TO263-5
Package Marking
LP38512TJ-1.8
LP38512TJ-1.8
LP38512TS-1.8
LP38512TS-1.8
Connection Diagrams
Supplied As:
Rail
Tape and Reel
Rail
Tape and Reel
Top View
TO-263 5 Pin Package
20183004
20183005
Top View
TO-263 THIN 5 Pin Package
Pin Descriptions for TO-263 and TO-263 THIN Packages
Pin #
1
2
3
4
5
TAB/DAP
Pin Name
EN
IN
GND
OUT
ERROR
TAB/DAP
Function
Enable. Pull high to enable the output, low to disable the output. This pin has no internal bias
and must be tied to the input voltage, or actively driven.
Input Supply Pin
Ground
Regulated Output Voltage Pin
ERROR Flag. A high level indicates that VOUT is within typically 15% (VOUT falling) of the
nominal regulated voltage.
The TO-263 TAB, and the TO-263 THIN DAP, is used as a thermal connection to remove
heat from the device to an external heatsink. The TAB/DAP is internally connected to device
pin 3, and is electrical ground connection.
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LP38512-1.8
1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator - National Semiconductor
