LT3048 반도체 회로 부품 판매점
Low Noise Bias Generator
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 Linear |
FEATURES
nn Generates Low Noise Bias Voltage from Single
Cell Li-Ion Battery
nn Output Current: Up to 40mA
nn Low Output Ripple and Noise: <500µVP-P
nn Boost Regulator
nn 1MHz Operation (LT3048)
nn 2.2MHz Operation (LT3048-XX)
nn Integrated Schottky Diode
nn Low Dropout Linear Regulator
nn 1.235V Feedback Voltage (LT3048)
nn Low Noise: <120µVRMS (10Hz to 100kHz)
nn 0.1% Load Regulation
nn Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
nn Short-Circuit and Thermal Protection
nn Load Disconnect in Shutdown
nn Available in 2mm × 2mm DFN Package
APPLICATIONS
nn Sensor Bias
nn Op Amp Supply
LT3048 Series
Low Noise Bias Generator
in 2mm × 2mm DFN
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
500µVP-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.
TYPICAL APPLICATION
IN
2.7V TO 4.8V
10µH
SW BSTOUT
VIN LDOIN
1µF LT3048-15
LDOOUT
OFF ON
EN BYP
GND
3048 TA01a
4.7µF
OUT
1nF
1µF
15V
VIN (V) IOUT (mA)
2.7 19
3.3 22
3.6 24
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
3048fa
1
LT3048 Series
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN...............................................................................6V
SW.............................................................................25V
BSTOUT.....................................................................23V
LDOIN........................................................................22V
LDOOUT.....................................................................22V
FB ................................................................................6V
BYP.........................................................................±0.3V
EN................................................................................6V
Operating Junction Temperature Range (Note 2)
E-Grade............................................... –40°C to 125°C
I-Grade............................................... –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
LT3048-XX
TOP VIEW
SW 1
8 BSTOUT
VIN 2 9 7 EN
GND 3 GND 6 LDOIN
BYP 4
5 LDOOUT
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
θJA = 102°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LT3048
SW 1
VIN 2
GND 3
BYP 4
TOP VIEW
9
GND
8 BSTOUT
7 EN
6 LDOOUT
5 FB
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
θJA = 102°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3048EDC#PBF
LT3048EDC#TRPBF
LGRR
8-Lead (2mm × 2mm) Plastic DFN
LT3048IDC#PBF
LT3048IDC#TRPBF
LGRR
8-Lead (2mm × 2mm) Plastic DFN
LT3048EDC-15#PBF
LT3048EDC-15#TRPBF LGKK
8-Lead (2mm × 2mm) Plastic DFN
LT3048IDC-15#PBF
LT3048IDC-15#TRPBF LGKK
8-Lead (2mm × 2mm) Plastic DFN
LT3048EDC-12#PBF
LT3048EDC-12#TRPBF LGQQ
8-Lead (2mm × 2mm) Plastic DFN
LT3048IDC-12#PBF
LT3048IDC-12#TRPBF LGQQ
8-Lead (2mm × 2mm) Plastic DFN
LT3048EDC-5#PBF
LT3048EDC-5#TRPBF LGQR
8-Lead (2mm × 2mm) Plastic DFN
LT3048IDC-5#PBF
LT3048IDC-5#TRPBF
LGQR
8-Lead (2mm × 2mm) Plastic DFN
LT3048EDC-3.3#PBF
LT3048EDC-3.3#TRPBF LGQS
8-Lead (2mm × 2mm) Plastic DFN
LT3048IDC-3.3t#PBF
LT3048IDC-3.3#TRPBF LGQS
8-Lead (2mm × 2mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
3048fa
2 For more information www.linear.com/LT3048
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( linear )
LT3048 data
데이터시트 다운로드 :
[ LT3048.PDF ]
[ LT3048 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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