LT1316 LINER [Linear Technology], LT1316 Datasheet
LT1316
Manufacturer Part Number
LT1316
Description
Micropower DC/DC Converter with Programmable Peak Current Limit
Manufacturer
LINER [Linear Technology]
Datasheet
1.LT1316.pdf
(16 pages)
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FEATURES
APPLICATIONS
TYPICAL
Precise Control of Peak Switch Current
Quiescent Current:
Low-Battery Detector Active in Shutdown
Low Switch V
8-Lead MSOP and SO Packages
Operates with V
Logic Level Shutdown Pin
Battery Backup
LCD Bias
Low Power – 48V to 5V/3.3V Converters
33 A in Active Mode
3 A in Shutdown Mode
D1: MOTOROLA MBR0520L
L1: SUMIDA CD43-470
2 CELLS
APPLICATION
+
CESAT
IN
U
C1
47 F
2-Cell to 5V Step-Up Converter
as Low as 1.5V
: 300mV at 500mA
NC
7
2
SHDN
LBI
R
V
SET
IN
6
3
R5
10k
1%
LT1316
U
47 H
L1
GND
SW
LBO
4
5
FB
8
1
D1
NC
R1
1M
1%
R2
324k
1%
+
C2
47 F
1316 TA01
5V
50mA
The LT
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 A in active mode.
Quiescent current decreases to 3 A in shutdown with the
low-battery detector still active.
The LT1316 is available in 8-lead MSOP and SO packages.
DESCRIPTION
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1316 is a micropower step-up DC/DC converter
90
80
70
60
with Programmable
0.1
U
Peak Current Limit
DC/DC Converter
Efficiency vs Load Current
LOAD CURRENT (mA)
1
Micropower
3.3V
10
IN
2.5V
1.8V
LT1316
1316 TA02
IN
IN
100
1
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