LX1882 Datasheet, PDF (1/13 Pages) Microsemi Corporation – Charge Pump Doubler with Linear Regulator

INTEGRATED PRODUCTS
LX1882
Charge Pump Doubler with Linear Regulator
PRODUCTION DATA SHEET
DESCRIPTION
The LX1882 is a two-stage boost operating current of less than 150µA.
regulator featuring a charge pump _{Quiescent current is reduced to < 5µA in}
doubler with an integrated low dropout _{shutdown mode.}
linear regulator. This configuration _{The LX1882’s internal regulator is stable}
allows for a low noise boosted output for _{with either Tantalum or Ceramic low-value}
powering noise sensitive applications. _{capacitors, typically 2.2µF on the output,}
The first stage features an internal _{allowing designers flexibility in external}
doubler charge pump converting an input _{component selection.}
supply of 1.8V to 4.4V, while the second _{Reliability and safety features include}
stage is an LDO regulating the boosted _{Thermal Shutdown Protection and}
voltage converting it to a low noise _{Integrated Short-Circuit Protection.}
output.
The LX1882 is capable of supplying up
to 50mA of output current with an
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
Wide Input Voltage: 1.8V to 4.4V
3.3V and Adjustable (2.5V to
5.5V) Output Voltage Options
Inductor-less design using small
ceramic capacitors
Low Shutdown Current of 1µA
Internal Thermal Shutdown and
Current Limiting
550kHz Switching Operation
APPLICATIONS/BENEFITS
Cellular Telephone VCO Supplies
Medical Instrumentation
Data Acquisition
Wireless PCMCIA Applications
EMI Sensitive Boost Applications
PRODUCT HIGHLIGHT
C3
V_IN
1.8V to 4.4V
C1
C4
8 CPO
SHDN 2
7 C+
V_OUT 1
LX1882-00
6 V_IN
FB 3
OFF ON
V_OUT
C2
5 C-
GND 4
C3
LED_N+1
V_IN
2V to 4.4V
C1
C4
8 CPO
V_OUT 1
LX1882-33
7 C+
SHDN 2
6 V_IN
FILT 3
5 C-
GND 4
V_OUT = 3.3V
C2
OFF ON
C_FILT
LX1882: Adjustable Output; LED Driver
LX1882: Fixed 3.3V Output
T_J (°C)
0 to 70
PACKAGE ORDER INFO
INPUT
OUTPUT
Plastic SOIC
DM _8-PIN
1.8V – 4.4V
Adj
LX1882-00CDM
Plastic MSOP
DU _8-PIN
LX1882-00CDU
2V – 4.4V
3.3V
LX1882-33CDM LX1882-33CDU
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX1882-00CDUT)
Copyright  2000
Rev. 1.0c, 2002-08-01
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Page 1