LT3470E...............................................– 40°C to 85°C
LT3470I ............................................. –40°C to 125°C
LT3470H ............................................ –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
FB 1
BIAS 2
BOOST 3
SW 4
9
8
7
6
5
SHDN
NC
V
IN
GND
TOP VIEW
SHDN
1
NC 2
V
IN
3
GND 4
8 FB
7 BIAS
6 BOOST
5 SW
DDB8 PACKAGE
8-LEAD (3mm
×
2mm) PLASTIC DFN
θ
JA
= 180°C/W
EXPOSED PAD (PIN 9) IS GROUND (MUST BE SOLDERED TO PCB)
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
θ
JA
= 140°C/W
ORDER INFORMATION
LEAD FREE FINISH
LT3470EDDB#TRMPBF
LT3470IDDB#TRMPBF
LT3470HDDB#TRMPBF
LT3470ETS8#PBF
LT3470ITS8#PBF
LT3470HTS8#PBF
LEAD BASED FINISH
LT3470EDDB
LT3470IDDB
LT3470HDDB
LT3470ETS8
LT3470ITS8
LT3470HTS8
TAPE AND REEL
LT3470EDDB#TRPBF
LT3470IDDB#TRPBF
LT3470HDDB#TRPBF
LT3470ETS8#TRPBF
LT3470ITS8#TRPBF
LT3470HTS8#TRPBF
TAPE AND REEL
LT3470EDDB#TR
LT3470IDDB#TR
LT3470HDDB#TR
LT3470ETS8#TR
LT3470ITS8#TR
LT3470HTS8#TR
PART MARKING
LBPN
LBPP
LCNR
LTBDM
LTBPW
LTCNQ
PART MARKING
LBPN
LBPP
LCNR
LTBDM
LTBPW
LTCNQ
PACKAGE DESCRIPTION
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
PACKAGE DESCRIPTION
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 150°C
–40°C to 85°C
–40°C to 125°C
–40°C to 150°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 150°C
–40°C to 85°C
–40°C to 125°C
–40°C to 150°C
Rev. E
2
For more information
www.analog.com
LT3470
ORDER INFORMATION
AUTOMOTIVE PRODUCTS**
LT3470EDDB#WTRMPBF
LT3470IDDB#WTRMPBF
LT3470HDDB#WTRMPBF
LT3470EDDB#WTRPBF
LT3470IDDB#WTRPBF
LT3470HDDB#WTRPBF
LBPN
LBPP
LCNR
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
8-Lead (3mm
×
2mm) Plastic DFN
–40°C to 85°C
–40°C to 125°C
–40°C to 150°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
**Versions
of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These
models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your
local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for
these models.
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
Quiescent Current from Bias
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
SHDN
= 10V, V
BOOST
= 15V, V
BIAS
= 3V unless otherwise specified.
CONDITIONS
l
MIN
TYP
0.1
10
35
0.1
25
0.1
MAX
4
0.5
18
50
0.5
60
1.5
1.265
80
150
225
0.01
1.5
300
435
775
2
775
2
2.2
12
5
0.2
UNITS
V
µA
µA
µA
µA
µA
µA
V
nA
nA
nA
%/V
ns
µA
mV
mV
mA
mA
mV
mV
µA
mV
µA
V
mA
µA
V
V
V
SHDN
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
V
SHDN
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
V
FB
Falling
V
FB
= 1V, E- and I-Grade
l
l
l
l
FB Comparator Trip Voltage
FB Pin Bias Current (Note 3)
1.228
1.250
35
35
35
0.0006
500
0.7
H-Grade
FB Voltage Line Regulation
Minimum Switch Off-Time (Note 5)
Switch Leakage Current
Switch V
CESAT
Switch Top Current Limit
Switch Bottom Current Limit
Catch Schottky Drop
Catch Schottky Reverse Leakage
Boost Schottky Drop
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
SHDN
Pin Current
SHDN
Input Voltage High
SHDN
Input Voltage Low
I
SW
= 100mA
V
SHDN
= 2.5V
I
SW
= 100mA (TS8 Package)
I
SW
= 100mA (DD8 Package)
V
FB
= 0V
V
FB
= 0V
I
SH
= 100mA (TS8 Package)
I
SH
= 100mA (DD8 Package)
V
SW
= 10V
I
SH
= 30mA
V
SW
= 10V, V
BIAS
= 0V
4V < V
IN
< 40V
l
215
215
250
325
225
630
630
0.2
650
0.2
l
1.7
7
1
2.5
Rev. E
For more information
www.analog.com
3
LT3470
ELECTRICAL CHARACTERISTICS
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LT3470E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and
correlation with statistical process controls. The LT3470I specifications
are guaranteed over the –40°C to 125°C temperature range. LT3470H
specifications are guaranteed over –40°C to 150°C temperature range.
Note 3:
Bias current flows out of the FB pin.
Note 4:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 5:
This parameter is assured by design and correlation with statistical
为了在产品众多、竞争激烈的市场上使产品与众不同，手持设备的制造商们往往把电池寿命和电源管理作为手机、PDA、多媒体播放器、游戏机、其它便携式消费类设备等产品的关键卖点来考虑。用户是从电池寿命这方面来看待电源管理的成效，其实它是多种因素共同作用的结果，这些因素包括 CPU 功能、系统软件、中间件，以及使用户可以在更长的充电或更换电池的间隔时间内享用各自设备的策略。 电源管理范围 任...[详细]
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