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LT3048IDC-3.3#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT3048 Series
1
3048fa
For more information www.linear.com/LT3048
TYPICAL APPLICATION
FEATURES DESCRIPTION
Low Noise Bias Generator
in 2mm × 2mm DFN
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.
APPLICATIONS
n
Generates Low Noise Bias Voltage from Single
CellLi-Ion Battery
n
Output Current: Up to 40mA
n
Low Output Ripple and Noise: <500µV
P-P
n
Boost Regulator
n
1MHz Operation (LT3048)
n
2.2MHz Operation (LT3048-XX)
n
Integrated Schottky Diode
n
Low Dropout Linear Regulator
n
1.235V Feedback Voltage (LT3048)
n
Low Noise: <120µV
RMS
(10Hz to 100kHz)
n
0.1% Load Regulation
n
Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
n
Short-Circuit and Thermal Protection
n
Load Disconnect in Shutdown
n
Available in 2mm × 2mm DFN Package
n
Sensor Bias
n
Op Amp Supply
L, LT, LT C , LT M, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
BSTOUTSW
LDOIN
LT3048-15
10µH
LDOOUT
V
IN
EN
1nF
1µF
1µF
3048 TA01a
4.7µF
IN
2.7V TO 4.8V
OUT
15V
BYPOFF ON
GND
V
IN
(V)
2.7
3.3
3.6
I
OUT
(mA)
19
22
24
LOAD CURRENT (mA)
0
EFFICIENCY (%)
30
40
50
15
25
3048 TA01b
20
10
0
5 10 20
60
70
80
V
IN
= 2.7V
V
IN
= 3.3V
V
IN
= 3.6V
LDOOUT = 15V
L = 10µH
DCR = 650mΩ
Efficiency
LT3048 Series
2
3048fa
For more information www.linear.com/LT3048
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
..............................................................................6V
SW ............................................................................25V
BSTOUT ....................................................................23V
LDOIN .......................................................................22V
LDOOUT .................................................................... 22V
FB ...............................................................................6V
BYP ........................................................................±0.3V
EN ...............................................................................6V
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3048EDC#PBF LT3048EDC#TRPBF LGRR 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048IDC#PBF LT3048IDC#TRPBF LGRR 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048EDC-15#PBF LT3048EDC-15#TRPBF LGKK 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048IDC-15#PBF LT3048IDC-15#TRPBF LGKK 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048EDC-12#PBF LT3048EDC-12#TRPBF LGQQ 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048IDC-12#PBF LT3048IDC-12#TRPBF LGQQ 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048EDC-5#PBF LT3048EDC-5#TRPBF LGQR 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048IDC-5#PBF LT3048IDC-5#TRPBF LGQR 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048EDC-3.3#PBF LT3048EDC-3.3#TRPBF LGQS 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3048IDC-3.3t#PBF LT3048IDC-3.3#TRPBF LGQS 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
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/
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
LT3048-XX LT3048
TOP VIEW
SW
V
IN
GND
BYP
BSTOUT
EN
LDOIN
LDOOUT
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
9
GND
4
1
2
3
6
5
7
8
θ
JA
= 102°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
SW
V
IN
GND
BYP
BSTOUT
EN
LDOOUT
FB
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
9
GND
4
1
2
3
6
5
7
8
θ
JA
= 102°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LT3048 Series
3
3048fa
For more information www.linear.com/LT3048
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, EN/UVLO = 3V, unless otherwise noted. Parameter applies
to all options unless specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Range 2.7 4.8 V
Boost Regulator
BSTOUT-LDOOUT Regulation Voltage
l
1 1.1 1.2 V
BSTOUT-V
IN
Regulation Voltage LDOOUT < V
IN
1.1 V
V
IN
Quiescent Current Not Switching
EN ≤ 0.4V
475
0.1
600
1
µA
µA
Switching Frequency LT3048
l
0.75
0.7
1.00
1.00
1.25
1.30
MHz
MHz
LT3048-XX
l
1.7
1.6
2.2
2.2
2.7
2.8
MHz
MHz
Maximum Duty Cycle LT3048
LT3048-XX
93
86
95
90
%
%
Switch Current Limit (Note 3) 300
400 500 mA
Switch V
CESAT
I
SW
= 200mA 220 mV
Diode Forward Drop I
DIODE
= 100mA 0.84 V
EN Voltage High 1.25 V
EN Voltage Low 0.4 V
LDO Linear Regulator
LDO Quiescent Current LT3048: Supplied by LDOIN 14 20 µA
LT3048-XX: Supplied by BSTOUT 14 20 µA
FB Pin Current 60 nA
FB Regulation Voltage LT3048: I
LOAD
= 100µA, FB = LDOOUT
LT3048: 100µA ≤ I
LOAD
≤ 40mA
l
1.216
1.210
1.235
1.235
1.254
1.260
V
V
FB Load Regulation LT3048: ∆I
LOAD
= 100µA to 40mA 2 6 mV
LDOOUT Regulation Voltage LT3048-15: I
LOAD
= 100µA
LT3048-15: 100µA ≤ I
LOAD
≤ 40mA
l
14.775
14.625
15.00
15.00
15.225
15.375
V
V
LT3048-12: I
LOAD
= 100µA
LT3048-12: 100µA ≤ I
LOAD
≤ 40mA
l
11.82
11.70
12.00
12.00
12.18
12.30
V
V
LT3048-5: I
LOAD
= 100µA
LT3048-5: 100µA ≤ I
LOAD
≤ 40mA
l
4.925
4.875
5.00
5.00
5.075
5.125
V
V
LT3048-3.3: I
LOAD
= 100µA
LT3048-3.3: 100µA ≤ I
LOAD
≤ 40mA
l
3.250
3.217
3.300
3.300
3.350
3.383
V
V
LDOOUT Load Regulation LT3048-15: ∆I
LOAD
= 100µA to 40mA 20 45 mV
LT3048-12: ∆I
LOAD
= 100µA to 40mA 20 45 mV
LT3048-5: ∆I
LOAD
= 100µA to 40mA 12 25 mV
LT3048-3.3: ∆I
LOAD
= 100µA to 40mA 9 18 mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT3048IDC-3.3#TRPBF

Mfr. #:
Buy LT3048IDC-3.3#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Low Noise Bias Generator in 2mm 2mm DFN
Lifecycle:
New from this manufacturer.
Delivery:
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