LT1054I

Manufacturer Part NumberLT1054I
DescriptionLT1054ITexas Instruments [SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS]
ManufacturerTexas Instruments, Inc.
LT1054I datasheet
 


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D
Output Current . . . 100 mA
D
Low Loss . . . 1.1 V at 100 mA
D
Operating Range . . . 3.5 V to 15 V
D
Reference and Error Amplifier for
Regulation
D
External Shutdown
D
External Oscillator Synchronization
D
Devices Can Be Paralleled
D
Pin-to-Pin Compatible With the
LTC1044/7660
description/ordering information
The LT1054 is a bipolar, switched-capacitor
voltage converter with regulator. It provides higher
output current and significantly lower voltage
losses than previously available converters. An
adaptive-switch
drive
scheme
efficiency over a wide range of output currents.
Total voltage drop at 100-mA output current
typically is 1.1 V. This applies to the full
supply-voltage range of 3.5 V to 15 V. Quiescent
current typically is 2.5 mA.
The LT1054 also provides regulation, a feature previously not available in switched-capacitor voltage
converters. By adding an external resistive divider, a regulated output can be obtained. This output is regulated
against changes in both input voltage and output current. The LT1054 also can be shut down by grounding the
feedback terminal. Supply current in shutdown typically is 100 µA.
The internal oscillator of the LT1054 runs at a nominal frequency of 25 kHz. The oscillator terminal can be used
to adjust the switching frequency or to externally synchronize the LT1054.
The LT1054C is characterized for operation over a free-air temperature range of 0°C to 70°C. The LT1054I is
characterized for operation over a free-air temperature range of −40°C to 85°C.
T A
PDIP (P)
−40 C to 85 C
−40°C to 85°C
SOIC (DW)
SOIC (DW)
PDIP (P)
0 C to 70 C
0°C to 70°C
SOIC (DW)
SOIC (DW)
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SWITCHED CAPACITOR VOLTAGE CONVERTERS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
FB/SD
CAP+
GND
CAP−
FB/SD
CAP+
GND
CAP−
optimizes
NC − No internal connection
ORDERING INFORMATION
ORDERABLE
PACKAGE †
PART NUMBER
Tube of 50
LT1054IP
Tube of 40
LT1054IDW
Reel of 2000
LT1054IDWR
Tube of 50
LT1054CP
Tube of 40
LT1054CDW
Reel of 2000
LT1054CDWR
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
LT1054
WITH REGULATORS
P PACKAGE
(TOP VIEW)
V
1
8
CC
OSC
2
7
V
3
6
REF
V
4
5
OUT
DW PACKAGE
(TOP VIEW)
NC
NC
1
16
NC
NC
2
15
V
3
14
CC
OSC
4
13
V
5
12
REF
V
6
11
OUT
NC
NC
7
10
NC
NC
8
9
TOP-SIDE
MARKING
LT1054IP
LT1054I
LT1054I
LT1054CP
LT1054C
LT1054C
Copyright  2004, Texas Instruments Incorporated
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LT1054I Summary of contents