參數(shù)資料
型號: LT1108CN8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
中文描述: 1.5 A SWITCHING REGULATOR, 19 kHz SWITCHING FREQ-MAX, PDIP8
封裝: PLASTIC, DIP-8
文件頁數(shù): 1/12頁
文件大?。?/td> 266K
代理商: LT1108CN8
1
LT1108
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
D
The LT1108 is a versatile micropower DC/DC converter.
The device requires only four external components to
deliver a fixed output of 5V or 12V. Supply voltage ranges
from 2V to 12V in step-up mode and to 30V in step-down
mode. The LT1108 functions equally well in step-up, step-
down, or inverting applications.
U
ESCRIPTIO
S
FEATURE
The LT1108 is pin-for-pin compatible with the LT1173, but
has a duty cycle of 70%, resulting in increased output
current in many applications. The LT1108 can deliver
150mA at 5V from a 2 AA cell input and 5V at 300mA from
9V in step-down mode. Quiescent current is just 110
μ
A,
making the LT1108 ideal for power conscious battery-
operated systems.
Switch current limit can be programmed with a single
resistor. An auxiliary gain block can be configured as a low
battery detector, linear post regulator, undervoltage lock-
out circuit, or error amplifier.
I
Operates at Supply Voltages from 2V to 30V
I
Consumes Only 110
μ
A Supply Current
I
Works in Step-Up or Step-Down Mode
I
Only Four External Components Required
I
Low Battery Detector Comparator On-Chip
I
User Adjustable Current Limit
I
Internal 1A Power Switch
I
Fixed or Adjustable Output Voltage Versions
I
Space Saving 8-Pin MiniDIP or S8 Package
U
S
A
O
PPLICATI
I
Palmtop Computers
I
3V to 5V, 5V to 12V Converters
I
9V to 5V, 12V to 5V Converters
I
LCD Bias Generators
I
Peripherals and Add-On Cards
I
Battery Backup Supplies
I
Cellular Telephones
I
Portable Instruments
U
A
O
PPLICATI
TYPICAL
LOAD CURRENT (mA)
1
78
E
80
82
84
10
100
LT1108 TA02
76
74
72
70
V
IN
= 3V
V
IN
= 2.5V
V
IN
= 2V
AVX
TPS
330
μ
F
6.3V
L1*
100
μ
H
LT1108 TA01
1N5817
5V
150mA
GND
SW2
SW1
I
LIM
V
IN
LT1108-5
SENSE
100
μ
F
+
*L1 =
+
2
×
AA
CELLS
GOWANDA GA20-103K
COILTRONICS CTX100-4
SUMIDA CD105-101K
47
Efficiency
Palmtop Computer Logic Supply
相關(guān)PDF資料
PDF描述
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