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參數(shù)資料
| 型號： | LT1054MJ8#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 40 kHz SWITCHING FREQ-MAX, CDIP8 |
| 封裝： | 0.300 INCH, LEAD FREE, HERMETIC SEALED, CERAMIC, DIP-8 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 264K |
| 代理商： | LT1054MJ8#TRPBF |
LT1054/LT1054L
1
1954lfg
BLOCK DIAGRAM
FEATURES
DESCRIPTION
Switched-Capacitor Voltage
Converter with Regulator
The LT1054 is a monolithic, bipolar, switched-capacitor
voltage converter and regulator. The LT1054 provides
higher output current than previously available converters
with significantly lower voltage losses. An adaptive switch
driver scheme optimizes efficiency over a wide range of
output currents. Total voltage loss at 100mA output current
is typically 1.1V. This holds true over the full supply voltage
range of 3.5V to 15V. Quiescent current is typically 2.5mA.
The LT1054 also provides regulation, a feature not previ-
ouslyavailableinswitched-capacitorvoltageconverters.By
adding an external resistive divider a regulated output can
be obtained. This output will be regulated against changes
in both input voltage and output current. The LT1054 can
also be shut down by grounding the feedback pin. Supply
current in shutdown is less than 100A.
The internal oscillator of the LT1054 runs at a nominal
frequency of 25kHz. The oscillator pin can be used to ad-
just the switching frequency or to externally synchronize
the LT1054.
The LT1054 is pin compatible with previous converters
such the LTC1044/ICL7660.
LT1054/LT1054 Voltage Loss
APPLICATIONS
■
Output Current: 100mA (LT1054)
125mA (LT1054L)
■
Reference and Error Amplifier for Regulation
■
Low Loss: 1.1V at 100mA
■
Operating Range:3.5V to 15V (LT1054)
3.5V to 7V (LT1054L)
■
External Shutdown
■
External Oscillator Synchronization
■
Can Be Paralleled
■
Pin Compatible with the LTC1044/ICL7660
■
Available in SW16 and SO-8 Packages
■
Voltage Inverter
■
Voltage Regulator
■
Negative Voltage Doubler
■
Positive Voltage Doubler
L
, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
REFERENCE
OSC
DRIVE
OSC
CAP–
GND
CAP+
FEEDBACK/
SHUTDOWN
–
+
R
*EXTERNAL CAPACITORS
2.5V
6
1
4
3
–VOUT
LT1054 BD
5
2
8
7
Q
VREF
CIN*
VIN
COUT*
+
OUTPUT CURRENT (mA)
0
VOLTAGE
LOSS
(V)
1
2
50
1054 TA01
0
25
75
100
125
TJ = 125°C
TJ = 25°C
TJ = –55°C
LT1054
LT1054L
3.5V ≤ VIN ≤ 15V (LT1054)
3.5V ≤ VIN ≤ 7V (LT1054L)
CIN = COUT = 100F
INDICATES GUARANTEED
TEST POINT
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