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PDF LX1882 Data sheet ( Hoja de datos )
| Número de pieza | LX1882 | |
| Descripción | Charge Pump Doubler | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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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
VIN
1.8V to 4.4V
C4
C1
8 CPO
SHDN 2
7 C+
VOUT 1
LX1882-00
6 VIN
FB 3
OFF ON
VOUT
C2
5 C-
GND 4
C3
LEDN+1
VIN
2V to 4.4V
C4
C1
8 CPO
VOUT 1
LX1882-33
7 C+
SHDN 2
6 VIN
FILT 3
5 C-
GND 4
VOUT = 3.3V
C2
OFF ON
CFILT
LX1882: Adjustable Output; LED Driver
LX1882: Fixed 3.3V Output
TJ (°C)
0 to 70
PACKAGE ORDER INFO
INPUT
1.8V – 4.4V
OUTPUT
Adj
Plastic SOIC
Plastic MSOP
DM 8-PIN
DU 8-PIN
LX1882-00CDM 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: 714-893-2570
Page 1
1 page  
INTEGRATED PRODUCTS
LX1882
Charge Pump Doubler with Linear Regulator
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C except where
otherwise noted. Test conditions: SHDN =VIN=3V, C1=0.22µF, C2 = C3 = C4 = 4.7µF
Parameter
Operating Voltage
IVIN Shutdown Current
Symbol
Test Conditions
VIN
LX1882-00
LX1882-33
SHDN =0V
LX1882-xx
Min Typ Max
1.8 4.4
2.0 4.4
15
Units
V
µA
IVIN Operating Current
IOUT=0mA, Burst Mode Operation
FB Input Current
FB Voltage
Regulated Output Voltage
VOUT Temperature Coefficient
Charge Pump Oscillator Frequency
CPO (Charge Pump Output) Output
Resistance
VOUT Dropout Voltage (Note 1)
VOUT Enable Time
VOUT Line Regulation
VOUT Load Regulation
FB=1.175V
VFB
VOUT
FOSC
RCPO
∆V
LX1882-00 only; IOUT=1mA
LX1882-33; IOUT=1mA
TA=25ºC
IOUT > 200µA, VIN=1.8V to 4.4V
VIN=1.8V, IOUT=10mA
VIN=3V, IOUT=10mA
VIN=4.4V, IOUT=10ma
LX1882-00; IOUT=10ma, VOUT=2.7V
LX1882-33; IOUT=10ma, VOUT=3.3V
IOUT=10mA, TA=25ºC
∆VOUT(VIN
)
VIN=3V to 4V, IOUT=0mA
∆VOUT(IOU IOUT=1mA to 10mA
T) IOUT=1ma to 50mA
VOUT Shutdown Resistance
SHDN Input Threshold
SHDN =0V, Resistance Measured to GND,
VIN=1.8V
SHDN =0V, Resistance Measured to GND,
VIN=4.4V
VIN=1.8V to 4.4V
SHDN Input Current
SHDN =VIN
SHDN =0V
250 400 µA
-50 50 nA
1.15 1.175 1.20 V
3.23 3.30 3.37 V
±150
ppm
480 550 620 kHz
22 30 Ω
16 20 Ω
10 20 Ω
100
75
160
120
mV
350 µS
17 30 mV
3 10 mV
40 mV
120 350
Ω
50 150 Ω
0.4 1 1.6 V
-1 1 µA
-1 1 µA
Note 1: Dropout voltage is defined as the minimum input to output differential required to maintain regulation.
Copyright 2000
Rev. 1.0c, 2002-08-01
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page 
INTEGRATED PRODUCTS
LX1882
Charge Pump Doubler with Linear Regulator
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
9
8
7
6
LX00mA
LX01mA
5
LX10mA
LX25mA
4 LX50mA
3
2.00
2.25
2.50
2.75
3.00 3.25 3.50
VIN (V)
3.75
4.00
4.25
4.50
10
9
8
7
6
5
4
3
2
1
0
LX2.0V
LX3.0V
LX4.0V
LX2.5V
LX3.5V
LX4.5V
5 10 15 20 25 30 35 40 45 50
OUTPUT LOAD CURRENT (mA)
Figure 11 – CPO Voltage vs. Input Voltage;
TA = 25°C, C1 = 0.22µF, C2, C3, C4 = 4.7µF, CFILT = 0.1µF
Figure 12 – CPO Voltage vs. Load Current;
TA = 25°C, C1 = 0.22µF, C2, C3, C4 = 4.7µF, CFILT = 0.1µF
120
110
100
90
80
70
60
50
1.5 2 2.5 3 3.5 4 4.5 5
INPUT VOLTAGE ( V )
Figure 13 – VOUT Shutdown Resistance vs. Input Voltage;
TA = 25°C, C1 = 0.22µF, C2, C3, C4 = 4.7µF, CFILT = 0.1µF
90%
80%
70%
60%
50%
40%
30%
20%
10%
2.0V
3.5V
2.5V
4.0V
3.0V
4.5V
0%
0
5 10 15 20 25 30 35 40 45 50
OUTPUT LOAD CURRENT - (mA)
Figure 14 – Efficiency vs. Output Current;
TA = 25°C, C1 = 0.22µF, C2, C3, C4 = 4.7µF, CFILT = 0.1µF
Copyright 2000
Rev. 1.0c, 2002-08-01
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LX1882.PDF ] | |
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