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參數資料
| 型號： | LX13088CLD-TR |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PDSO10 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, PLASTIC, DFN-10 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 422K |
| 代理商： | LX13088CLD-TR |
LX13088
PRODUCTION DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2010
Rev. 1.1, 2010-06-08
Dual 1A Step-Down Converters
TM
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DESCRIPTION
KEY FEA T URES
The LX13088 is a highly integrated
dual output voltage regulator ideal for
low power applications that require
minimal board space. The two current
mode buck converters include integrated
high side control switches, synchronous
rectifiers, and internal compensation.
The outputs of each converter are both
rated for up to 1A, and the output
voltages are adjustable using external
resistive dividers.
The LX13088 step down converters
operate at 1.3MHz fixed switching
frequency under normal load, reducing
external output filter component values
and size. Under light load conditions, the
converters operate in a pulse-skipping
mode for improved efficiency.
The LX13088 incorporates out of
phase switching, where converter 2
switches 180° out of phase from
converter 1 in order to minimize the input
ripple effects.
The controller also
features an E/S pin that provides an
enable input function, or allows the
converter to be
synchronized to an external clock. With
the E/S input held low, the LX13088
draws less than 10uA.
Both converters have controlled soft
start, in addition to power up sequencing.
In the start-up sequence, the output of
converter 1 is designed to precede the
output of converter 2.
Power On Reset function is provided
by means of an open-drain output at the
POR pin. The Power On Reset function
monitors the voltages at the VMON, FB1
and FB2 pins, and pulls low if any of
these voltages drop below the stated POR
threshold.
The
POR
is
internally
deglitched and provides a delayed
recovery and reset time.
The LX13088 provides peak over
current protection, short circuit protection
and thermal shutdown. Discharge-Before-
Turn-On
discharges
the
outputs
completely before soft starting to always
bring them up in the proper sequence at
start up or after a POR event.
Outputs can be set from 1V to
3.6V @ 1A
No Rectifier Diode required
1.3MHz Switching
180° Phase Shifted Switching
Optional External Clocking (2x
clock required)
Light load Pulse Skipping
Enable/Sleep state
Internal Soft Start
Open-drain Power On Reset
Monitors Input and Outputs
Discharge Before-Turn-On
Peak Over-Current Protection
Short Circuit Protection
Over Temperature Shutdown
APPLICA T IONS
Hard Disk Drives
Set- Top Boxes
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Product Highlight
PACKAGE ORDER INFO
THERMAL DATA
TA (°C)
LD
Plastic 3x3 mm DFN 10-pin
θ
J
A = 33 °C/W
RoHS Compliant / Pb-free
THERMAL RESISTANCE
-JUNCTION TO AMBIENT
0 to +70
LX13088CLD
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The
θJA numbers are guidelines for the thermal performance of the
device/pc-board system. All of the above assume no ambient airflow.
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. LX13088CLD-TR)
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