LT1054LCS8PBF

Manufacturer Part NumberLT1054LCS8PBF
DescriptionSOP8
ManufacturerLinear Technology Corporation
LT1054LCS8PBF datasheets
 

Specifications of LT1054LCS8PBF

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FEATURES
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 LTC
1044/ICL7660
®
Available in SW16 and SO-8 Packages
APPLICATIONS
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.
BLOCK DIAGRAM
V
REF
6
2.5V
REFERENCE
R
+
1
OSC
FEEDBACK/
SHUTDOWN
7
R
OSC
*EXTERNAL CAPACITORS
Switched-Capacitor Voltage
Converter with Regulator
DESCRIPTION
The LT
1054 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-
ously available in switched-capacitor voltage converters. 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 100µA.
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.
V
IN
8
DRIVE
+
CAP
2
+
C
*
IN
Q
Q
CAP
4
DRIVE
DRIVE
3
GND
+
C
*
OUT
5
–V
OUT
DRIVE
LT1054 • BD
LT1054/LT1054L
LT1054/LT1054 Voltage Loss
2
3.5V ≤ V
≤ 15V (LT1054)
IN
3.5V ≤ V
≤ 7V (LT1054L)
LT1054L
IN
C
= C
= 100µF
IN
OUT
INDICATES GUARANTEED
TEST POINT
LT1054
1
T
= 125°C
J
T
= 25°C
J
T
= –55°C
J
0
0
25
50
75
100
125
OUTPUT CURRENT (mA)
1054 TA01•
1954lfg
1