參數(shù)資料
型號: LTC1556CGN
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SIM Power Supply and Level Translator
中文描述: SWITCHED CAPACITOR REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO20
封裝: 0.150 INCH, PLASTIC, SSOP-20
文件頁數(shù): 6/12頁
文件大?。?/td> 255K
代理商: LTC1556CGN
6
LTC1555/LTC1556
PI
FU
CTIO
N
S
U
U
LTC1556 Only
EN (Pin 5):
Auxiliary LDO/Power Switch Enable Pin. A
logic high on this pin from the controller will enable the
auxiliary LDO output. When the LDO is disabled, the LDO
output will float or be pulled to ground by the load. If left
floating, the EN pin will be pulled down to GND by an
internal 1
μ
A current source.
FB (Pin 6):
Auxiliary LDO Feedback Pin. When FB is
connected to the LDO pin (Pin 17), the LDO output is
regulated to 4.3V (typ). If the FB pin is left open or tied to
BLOCK DIAGRA
M
W
ground, the regulator acts as a
30
switch between V
CC
and LDO.
LDO (Pin 17):
LDO Output Pin. This pin should be tied to
the FB pin for 4.3V LDO operation. The 4.3V LDO output
is usable only when V
CC
is 5V (or greater). It is not
available when V
CC
= 3V. The LDO output may also be
used as a
30
power switch if the FB pin is grounded
or left floating. When used as a regulator, LDO must be
bypassed to GND with a
3.3
μ
F capacitor. The LDO
output current will subtract from available V
CC
current.
1.23V
61k
153k
FB
EN
1555/56 BD
DDRV
OPTIONAL
1
μ
A
1
μ
A
LDO
I/O
FREQUENCY
SYNTHESIZER
POWER
LTC1555/LTC1556
LTC1556 ONLY
4.3V
+
DATA
20k
10k
CLK
CIN
RST
DV
CC
SS
3V
RIN
GND
M0
M1
V
IN
V
BATT
C
IN
10
μ
F
V
CC
I/O
CLK
RST
GND
V
CC
C1
+
0.1
μ
F
C1
GND
STEP-UP/
STEP-DOWN
CHARGE PUMP
DC/DC
CONVERTER
SIM
CONTROLLER
V
CC
C
OUT
10
μ
F
C
LDO
10
μ
F
+
+
相關(guān)PDF資料
PDF描述
LTC1555IGN SIM Power Supply and Level Translator
LTC1556IGN SIM Power Supply and Level Translator
LTC1555CGN SIM Power Supply and Level Translator
LTC1555C SIM Power Supply and Level Translator
LTC1555I SIM Power Supply and Level Translator
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