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LT1316IS8 Datasheet

  • LT1316IS8

  • Micropower DC/DC Converter with Programmable Peak Current Li...

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LT1316
Micropower
DC/DC Converter
with Programmable
Peak Current Limit
FEATURES
s
s
DESCRIPTION
The LT
廬
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碌A(chǔ) in active mode.
Quiescent current decreases to 3碌A(chǔ) 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.
s
s
s
s
s
Precise Control of Peak Switch Current
Quiescent Current:
33碌A(chǔ) in Active Mode
3碌A(chǔ) in Shutdown Mode
Low-Battery Detector Active in Shutdown
Low Switch V
CESAT
: 300mV at 500mA
8-Lead MSOP and SO Packages
Operates with V
IN
as Low as 1.5V
Logic Level Shutdown Pin
APPLICATIONS
s
s
s
Battery Backup
LCD Bias
Low Power 鈥?48V to 5V/3.3V Converters
TYPICAL APPLICATION
2-Cell to 5V Step-Up Converter
L1
47碌H
6
7
V
IN
SHDN
LT1316
NC
2
LBI
R
SET
3
R5
10k
1%
D1: MOTOROLA MBR0520L
L1: SUMIDA CD43-470
LBO
GND
4
1
NC
R2
324k
1%
5
SW
FB
8
D1
R1
1M
1%
5V
50mA
90
3.3V
IN
2.5V
IN
2 CELLS
C1
47碌F
C2
47碌F
EFFICIENCY (%)
+
+
80
70
60
1316 TA01
0.1
U
U
U
Efficiency vs Load Current
1.8V
IN
1
10
100
1316 TA02
LOAD CURRENT (mA)
1

LT1316IS8 產(chǎn)品屬性

  • LT1316

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 升壓，反激式

  • 可調(diào)式

  • 1

  • 1.23 V ~ 30 V

  • 1.5 V ~ 12 V

  • -

  • -

  • 500mA

  • 無

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 管件

  • 8-SOIC

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