參數(shù)資料
型號(hào): LTC1475CS8-5
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Low Quiescent Current High Efficiency Step-Down Converters
中文描述: 0.75 A SWITCHING REGULATOR, PDSO8
封裝: 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù): 5/20頁(yè)
文件大?。?/td> 350K
代理商: LTC1475CS8-5
5
LTC1474/LTC1475
FU
CTIO
AL DIAGRW
U
U
LTC1474: LBI
LTC1475: LBI/OFF
+
+
+
×
1
μ
A
LBI/OFF
LBO
4.75
μ
s
1-SHOT
1.23V
REFERENCE
GND
1474/75 FD
4
2
8
1.23V
1M
3M
(5V VERSION)
1.68M
(3.3V VERSION)
READY
STRETCH
V
CC
V
IN
7
V
IN
V
OUT
V
OUT
/V
FB
1
1
×
C
ON
V
LB
ON
5
SW
5
SENSE
R
(OPTIONAL)
20
×
100mV
WAKEUP
TRIGGER
OUT
LTC1474: RUN
LTC1475: ON
6
+
+
×
CONNECTION NOT PRESENT IN LTC1474 SERIES
CONNECTION PRESENT IN LTC1474 SERIES ONLY
3
OUTPUT DIVIDER IS
IMPLEMENTED EXTERNALLY IN
ADJUSTABLE VERSIONS
PI
FU
CTIO
N
S
U
U
V
OUT
/V
FB
(Pin 1):
Feedback of Output Voltage. In the fixed
versions, an internal resistive divider divides the output
voltage down for comparison to the internal 1.23V refer-
ence. In the adjustable versions, this divider must be
implemented externally.
LBO (Pin 2):
Open Drain Output of the Low Battery
Comparator. This pin will sink current when Pin 3 is below
1.23V.
LBI/OFF (Pin 3):
Input to Low Battery Comparator. This
input is compared to the internal 1.23V reference. For the
LTC1475, a momentary ground on this pin puts regulator
in shutdown mode.
GND (Pin 4):
Ground Pin.
SW (Pin 5):
Drain of Internal PMOS Power Switch. Cath-
ode of Schottky diode must be closely connected to this
pin.
SENSE (Pin 6):
Current Sense Input for Monitoring Switch
Current and Source of Internal PMOS Power Switch.
Maximum switch current is programmed with a resistor
between SENSE and V
IN
pins.
V
IN
(Pin 7):
Main Supply Pin.
RUN/ON (Pin 8):
On LTC1474, voltage level on this pin
controls shutdown/run mode (ground = shutdown, open/
high = run). On LTC1475, a momentary ground on this pin
puts regulator in run mode. A 100k series resistor must be
used between Pin 8 and the switch or control voltage.
相關(guān)PDF資料
PDF描述
LTC1475IS8 Low-Power LinCMOS(TM) Dual Comparator 8-SOIC -55 to 125
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