LX8821 Datasheet, PDF (1/6 Pages) Microsemi Corporation – DUAL CHANNEL 2.5A LOW DROPOUT REGULATOR

LX8821
TM
®
DUAL CHANNEL 2.5A LOW DROPOUT REGULATOR
PRODUCTION DATA SHEET
DESCRIPTION
The LX8821 is a positive-voltage Power sequencing logic ensures
linear regulator with one fixed and proper startup regardless of the
one adjustable output featuring low- level of V_CTRL or V_PWR. The
dropout and high accuracy.
LX8821 outputs remain off while
To maximize efficiency, the V_PWR < 2.2V.
LX8821 accepts two supply voltage Thermal and Short Circuit
inputs for the V_CONTROL and V_POWER Current Protection are integrated
sections. This configuration reduces on-chip and operate independently
power dissipation by operating the for each regulator output.
regulator near dropout (V_PWR-V_OUT = The LX8821 regulator is stable
VDO = 0.4V @ 2A) while providing with a wide range of output
sufficient operating headroom for the capacitance and ESR; typically
control logic.
10μF tantalum or ceramic on the
Each channel can supply up to outputs is sufficient.
2.5A independently with a regulator Microsemi uses a low profile
design optimized for system power package with low thermal
efficiency by consuming minimal resistance and ease of assembly
ground current and directing using surface mount technology.
quiescent current to the load
The internal voltage reference is
trimmed at wafer level, enabling
precise output voltages, typically
±1% of its specified value.
IMPORTANT: For the most current data, consult Microsemi’s website: http://www.microsemi.com
KEY FEATURES
ƒ Two Independent Regulated
Outputs
ƒ Wide DC Supply Voltage of 3.0V to
10.0V
ƒ Accurate Output Voltages
ƒ Low Tolerance Line (0.5%) and
Load (0.5%) Regulation
ƒ Max. Dropout of 0.6V at Rated
Current
ƒ Independent Thermal and Current
Limit Protection
ƒ Loop Stability Independent of
Output Capacitor
ƒ Type SMT Power Package
APPLICATIONS/BENEFITS
ƒ ASIC, Memory, I/O
ƒ Low Voltage Logic Supplies
ƒ Active SCSI Terminators
ƒ Battery Charging Circuits
ƒ PC Peripherals
ƒ Instrumentation
V_POWER
10µF
V_CONTROL
PRODUCT HIGHLIGHT
V_PWR
V_OUT1
Part ^VOUT2
V_CONTROL
1µF
GND ^ADJ
LX8821
33µF
R1
33µF
R2
V_OUT1
V_OUT2
V_OUT2
= 1.25•
⎢⎣⎡^{1 +}
R1⎤
R2 ^⎥⎦
+
I _ADJ
•
R1
GROUND
T_A (°C)
0 to 100
PACKAGE ORDER INFO
Output V1
Output V2
Plastic S-Pak
DF _7-Pin
RoHS Compliant
1.5V
Adjustable
LX8821CDF
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8821CDF-TR)
Copyright © 2005
Rev. 1.1, 2005-03-09
Microsemi
Microsemi Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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