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PDF LT3048-15 Data sheet ( Hoja de datos )
| Número de pieza | LT3048-15 | |
| Descripción | Low Noise Bias Generator | |
| Fabricantes | Linear | |
| Logotipo |  |
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FEATURES
n Generates Low Noise Bias Voltage from Single Cell
Li-Ion Battery
n Output Current: Up to 40mA
n Low Output Ripple and Noise: <500µVP-P
n Boost Regulator
n 2.2MHz Operation
n 300mA Power Switch
n Integrated Schottky Diode
n Low Dropout Linear Regulator
n Low Noise: <120µVRMS (10Hz to 100kHz)
n 0.1% Load Regulation
n Short-Circuit and Thermal Protection
n Load Disconnect in Shutdown
n Available in 2mm × 2mm DFN Package
APPLICATIONS
n Sensor Bias
n Op Amp Supply
LT3048-15
Low Noise Bias Generator
in 2mm × 2mm DFN
DESCRIPTION
The LT®3048-15 generates a low noise, low ripple bias
supply from an input voltage of 2.7V to 4.8V.
The LT3048-15 includes a boost regulator and a LDO
linear regulator. The boost regulator provides power to
the linear regulator.
The boost regulator output voltage is regulated to 1.1V
above the LDO output, optimizing LDO ripple rejection and
transient response. Fixed frequency operation and current
mode control allow the use of very small inductors and
results in low, predictable output ripple.
The linear regulator in the LT3048-15 generates a fixed
15V output. High power supply ripple rejection combined
with a low noise internal reference results in less than
500µVP-P output ripple and noise.
The LT3048-15 is available in a 8-lead 2mm × 2mm DFN
package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
IN
2.7V TO 4.8V
10µH
SW BSTOUT
VIN LDOIN
1µF LT3048-15
LDOOUT
OFF ON
EN BYP
GND
4.7µF
OUT
1nF
1µF
15V
VIN (V) IOUT (mA)
2.7 19
3.3 22
3.6 24
3048 TA01a
Efficiency
80
70
60
50
40
30 LDOOUT = 15V
L = 10µH
20 DCR = 650mΩ
10
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
0
0 5 10 15 20 25
LOAD CURRENT (mA)
3048 TA01b
For more information www.linear.com/LT3048-15
304815f
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1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LT3048-15
LDOOUT Current Limit
90
80
70
60
50
40
30
20
10
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3048 G09
Boost Switch Current Limit
500
450
400
350
300
250
200
150
100
50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3048 G11
Boost Switch Current Limit
500
450
400
350
300
250
200
150
100
50
0
0 20 40 60 80 100
DUTY CYCLE (%)
3048 G10
Switching Frequency
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3048 G12
For more information www.linear.com/LT3048-15
304815f
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5 Page 
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
LT3048-15
DC8 Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1939 Rev Ø)
Exposed Pad Variation AA
1.8 REF
0.90 0.23
REF REF
2.60 ±0.05
0.85 ±0.05
0.335 REF
PACKAGE
OUTLINE
0.25 ±0.05
0.45 BSC
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
2.00 SQ ±0.05
1.8 REF
58
0.23
0.335 REF
0.55 ±0.05
PIN 1 BAR
TOP MARK
2.00 ±0.05
(4 SIDES)
REF
PIN 1 NOTCH
R = 0.15
(SEE NOTE 6)
(DC8MA) DFN 0113 REV Ø
4 1 0.23 ±0.05
0.200 REF
0.75 ±0.05
0.45 BSC
BOTTOM VIEW—EXPOSED PAD
0.00 – 0.05
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnFeoctriomn oofrietsicnifrocurimtsaatsiodneswcriwbewd.lhinereeainr.wcoillmno/LtTin3fr0in4g8e-o1n5existing patent rights.
304815f
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT3048-15.PDF ] | |
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