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參數(shù)資料
| 型號： | LTC1551LCS8-4.1 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Noise, Switched Capacitor Regulated Voltage Inverters |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 900 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 271K |
| 代理商： | LTC1551LCS8-4.1 |
7
LTC1550L/LTC1551L
BLOCK DIAGRA
M
W
–
+
–
+
S2
S3
S1
S4
C
CP
V
CC
CP
OUT
C1
+
C1
–
C1
CLK
900kHz
CHARGE
PUMP
LINEAR
REGULATOR
1550L/51L BD
V
OUT
ADJ
REG
C
OUT
58mV
1.167V
*SHDN
*SHDN FOR LTC1550L, SHDN FOR LTC1551L
** FIXED OUTPUT VERSIONS ONLY
COMP2
**
**
+
1.225V
APPLICATIO
S I
FOR
ATIO
U
OVERVIEW
The LTC1550L/LTC1551L are switched capacitor, inverting
charge pumps with internal linear post-regulators. The
LTC1550L/LTC1551L provide a regulated, low ripple output
at up to 20mA load current with the appropriate input
voltage as output load current depends on the input/
output voltage combination. Consult the graph provided in
the Typical Performance Characteristics section and the
Electrical Characteristics table for guaranteed test points.
The LTC1550L/LTC1551L are ideal for use as bias voltage
W
U
U
generators for GaAs transmitter FETs in portable RF and
cellular telephone applications. The LTC1550L features an
active-low Shutdown pin (SHDN) that drops quiescent
current to below 1
μ
A. The LTC1551L is identical to the
LTC1550L, except that the Shutdown pin is active-high
(SHDN). All members of the LTC1550L/LTC1551L family
feature a 900kHz charge pump frequency. The LTC1550L/
LTC1551L come standard with fixed –4.1V, –2.5V, –2V
and adjustable output voltages. The LTC1550L/LTC1551L
can be configured for other fixed output voltages; contact
Linear Technology for more information.
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