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LX1732CDU Datasheet

  • LX1732CDU

  • High Current PFM Boost Converter

  • 12頁

  • MICROSEMI

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LX1732
I N T E G R A T E D
P R O D U C T S
High Current PFM Boost Converter
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LX1732 is a compact, high
efficiency, step-up DC-DC boost
regulator implemented in a
BiCMOS process technology. This
device features variable frequency
operation and a built in N-channel
MOSFET power switch for
optimal functioning in low voltage
portable systems.
Start-up operation is guaranteed
from 1.1V inputs (at light load)
and the input voltage can be as low
as 0.7V after start-up.
This
attribute allows the LX1732 to
operate in an extended power-
savings mode, supplying (data)
critical system components, even
after battery capacity no longer
supports normal operation.
The output voltage programming
range of 2.2V to 5V, requires only
two external resistors via the
feedback pin (see Figure 1.0).
Output load currents of up to
200mA are achievable and the
internal MOSFET is capable of
switching up to a 1A current limit.
Quiescent current during operation
is 200碌A(chǔ) (max) and in shutdown-
mode drops to a mere 1碌A(chǔ) thus
maximizing overall battery life-
time.
The LX1732 features a low
battery-detect circuitry that alerts
system power management of low
input voltages thus allowing
portable systems to enter a power-
savings mode (e.g., to protect data)
88% Efficiency
200碌A(chǔ) Quiescent Current
0.1碌A(chǔ) Logic Shutdown
Low-Battery Detector
8-Pin MSOP Package
APPLICATIONS/BENEFITS
Pagers
Wireless Phones
Hand-Held Computers
PDAs
RF Tags
Two-cell Alkaline Battery
Applications
Single-cell Lithium Ion 5V
Boost
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
V
BAT
C
IN
R
3
R
4
IN
SHDN
L
100%
D
SW
VC
Efficiency (%)
V
OUT
R
1
90%
80%
LX1732
LBI
LBO
GND
FB
C
OUT
70%
60%
R
2
50%
0
25
50
75
100
125
150
175
200
Output Current
Figure 1
鈥?LX1732 General Circuit Topology and Typical Efficiency Performance
LX1732
LX1732
PACKAGE ORDER INFO
Plastic MSOP
DU
8-Pin
T
A
(擄C)
0 to 70
RoHS Compliant / Pb-free
Transition DC: 0432
LX1732CDU
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part
number. (i.e. LX1732CDU-TR)
Copyright
漏
2000
Rev. 1.1c, 2005-03-03
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1

LX1732CDU 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 升壓（升壓）

  • 可調(diào)式

  • 1

  • 2.2 V ~ 5 V

  • 1.1 V ~ 5.5 V

  • -

  • 100kHz

  • 200mA

  • 無

  • 0°C ~ 70°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 管件

  • 8-MSOP

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