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LT1316CMS8 Datasheet(PDF) 1 Page - Linear Technology

Part # LT1316CMS8
Description  Micropower DC/DC Converter with Programmable Peak Current Limit
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1316CMS8 Datasheet(HTML) 1 Page - Linear Technology

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1
LT1316
Micropower
DC/DC Converter
with Programmable
Peak Current Limit
s
Precise Control of Peak Switch Current
s
Quiescent Current:
33
µA in Active Mode
3
µA in Shutdown Mode
s
Low-Battery Detector Active in Shutdown
s
Low Switch VCESAT: 300mV at 500mA
s
8-Lead MSOP and SO Packages
s
Operates with VIN as Low as 1.5V
s
Logic Level Shutdown Pin
FEATURES
DESCRIPTION
The LT
®1316 is a micropower step-up DC/DC converter
that operates from an input voltage as low as 1.5V. A
programmable input current limiting function allows pre-
cise control of peak switch current. Peak switch current
can be set to any value between 30mA and 500mA by
adjusting one resistor. This is particularly useful for
DC/DC converters operating from high source impedance
inputs such as lithium coin cells or telephone lines.
The fixed off-time, variable on-time regulation scheme
results in quiescent current of only 33
µA in active mode.
Quiescent current decreases to 3
µA in shutdown with the
low-battery detector still active.
The LT1316 is available in 8-lead MSOP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
APPLICATIONS
s
Battery Backup
s
LCD Bias
s
Low Power – 48V to 5V/3.3V Converters
2-Cell to 5V Step-Up Converter
VIN
SW
RSET
GND
FB
SHDN
65
8
1
4
3
2
7
LBO
LBI
LT1316
C2
47
µF
NC
NC
R5
10k
1%
C1
47
µF
2 CELLS
L1
47
µH
D1
5V
50mA
D1: MOTOROLA MBR0520L
L1: SUMIDA CD43-470
1316 TA01
+
+
R1
1M
1%
R2
324k
1%
LOAD CURRENT (mA)
0.1
60
80
90
1
10
100
1316 TA02
70
3.3VIN
2.5VIN
1.8VIN
Efficiency vs Load Current


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