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LT3048IDC#PBF

Description
Switching Voltage Regulators LT3048 Series - Low Noise Bias Generator in 2mm + 2mm DFN
Categorysemiconductor    Power management   
File Size269KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LT3048IDC#PBF Overview

Switching Voltage Regulators LT3048 Series - Low Noise Bias Generator in 2mm + 2mm DFN

LT3048 Series
Low Noise Bias Generator
in 2mm
×
2mm DFN
FEATURES
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DESCRIPTION
The
LT
®
3048
series generate low noise, low ripple bias
supplies from input voltages of 2.7V to 4.8V.
The LT3048 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 generates a program-
mable output and the LT3048-XX generate fixed output
voltages. High power supply ripple rejection combined
with a low noise internal reference results in less than
500µV
P-P
output ripple and noise.
The LT3048 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.
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Generates Low Noise Bias Voltage from Single
Cell Li-Ion Battery
Output Current: Up to 40mA
Low Output Ripple and Noise: <500µV
P-P
Boost Regulator
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1MHz Operation (LT3048)
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2.2MHz Operation (LT3048-XX)
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Integrated Schottky Diode
Low Dropout Linear Regulator
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1.235V Feedback Voltage (LT3048)
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Low Noise: <120µV
RMS
(10Hz to 100kHz)
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0.1% Load Regulation
Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
Short-Circuit and Thermal Protection
Load Disconnect in Shutdown
Available in 2mm
×
2mm DFN Package
APPLICATIONS
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Sensor Bias
Op Amp Supply
TYPICAL APPLICATION
Efficiency
IN
2.7V TO 4.8V
10µH
SW
1µF
V
IN
BSTOUT
LDOIN
EFFICIENCY (%)
LT3048-15
LDOOUT
OFF ON
EN
GND
3048 TA01a
80
4.7µF
70
60
50
40
30
20
10
0
0
5
10
LDOOUT = 15V
L = 10µH
DCR = 650m
V
IN
= 2.7V
V
IN
= 3.3V
V
IN
= 3.6V
20
15
LOAD CURRENT (mA)
25
3048 TA01b
BYP
1nF
1µF
OUT
15V
V
IN
(V) I
OUT
(mA)
2.7
19
3.3
22
3.6
24
3048fa
For more information
www.linear.com/LT3048
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