LT1054/LT1054L
Switched-Capacitor Voltage
Converter with Regulator
Features Description
Output Current: 100mA (LT1054) The LT 1054 is a monolithic, bipolar, switched-capacitor
125mA (LT1054L) voltage converter and regulator. The LT1054 provides
Reference and Error Amplifier for Regulation higher output current than previously available converters
Low Loss: 1.1V at 100mA with significantly lower voltage losses. An adaptive switch
Operating Range: 3.5V to 15V (LT1054) driver scheme optimizes efficiency over a wide range of
3.5V to 7V (LT1054L) output currents. Total voltage loss at 100mA output current
External Shutdown is typically 1.1V. This holds true over the full supply voltage
External Oscillator Synchronization range of 3.5V to 15V. Quiescent current is typically 2.5mA.
Can Be Paralleled
The LT1054 also provides regulation, a feature not previ-
Pin Compatible with the LTC 1044/ICL7660
ously available in switched-capacitor voltage converters. By
Available in SW16 and SO-8 Packages
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
a
also be shut down by grounding the feedback pin. Supply
Voltage Inverter
current in shutdown is less than 100A.
Voltage Regulator
The internal oscillator of the LT1054 runs at a nominal
Negative Voltage Doubler
frequency of 25kHz. The oscillator pin can be used to ad-
Positive Voltage Doubler
just the switching frequency or to externally synchronize
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
the LT1054.
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
The LT1054 is pin compatible with previous converters
such the LTC1044/ICL7660.
Block Diagram
V
REF
V
6 IN
LT1054/LT1054 Voltage Loss
8
2
2.5V
3.5V V 15V (LT1054)
REFERENCE
IN
3.5V V 7V (LT1054L) LT1054L
IN
R DRIVE
C = C = 100F
IN OUT
INDICATES GUARANTEED
+
+
CAP 2 TEST POINT
C *
LT1054
IN
Q
1
1
OSC
Q
FEEDBACK/
SHUTDOWN CAP 4
7
R
T = 125C
J
OSC
T = 25C
J
DRIVE DRIVE
T = 55C
J
3 GND
*EXTERNAL CAPACITORS
0
C *
0 25 50 75 100 125
OUT
OUTPUT CURRENT (mA)
5 V
OUT
1054 TA01
DRIVE
LT1054 BD
1954lfh
1
For more information www.linear.com/LT1054
VOLTAGE LOSS (V)
+
+
pplicationsLT1054/LT1054L
aB solute m aximum r (Note 1)
Supply Voltage (Note 2) Maximum Junction Temperature (Note 3)
LT1054 .................................................................16V LT1054C/LT1054LC ......................................... 125C
LT1054L .................................................................7V LT1054I ............................................................. 125C
Input Voltage LT1054M ........................................................... 150C
+
Pin 1 ................................................. 0V V V Storage Temperature Range
PIN1
+
Pin 3 (S Package) ............................. 0V V V
J8, N8 and S8 Packages .................... 55C to 150C
PIN3
Pin 7 .............................................. 0V V V S Package ......................................... 65C to 150C
PIN7 REF
Pin 13 (S Package) ...................... 0V V V Lead Temperature (Soldering, 10 sec) .................. 300C
PIN13 REF
Operating Junction Temperature Range
LT1054C/LT1054LC .............................. 0C to 100C
LT1054I ............................................. 40C to 100C
LT1054M ............................................ 55C to 125C
p in c F
TOP VIEW
TOP VIEW
NC 1 16 NC
TOP VIEW
+
FB/SHDN 1 8 V
NC 2 15 NC
+
+ +
FB/SHDN 1 8 V
CAP 2 7 OSC FB/SHDN 3 14 V
+
+
CAP OSC
2 7 CAP 4 13 OSC
GND 3 6 V
REF
GND 3 6 V GND 5 12 V
CAP V REF
REF 4 5
OUT
6
CAP 11 V
CAP 4 5 V OUT
OUT
S8 PACKAGE
7
NC 10 NC
8-LEAD PLASTIC SO
N8 PACKAGE J8 PACKAGE
T = 125C, = 120C/W
JMAX JA 8
NC 9 NC
8-LEAD PLASTIC DIP 8-LEAD CERAMIC DIP
SEE REGULATION AND CAPACITOR SELECTION SECTIONS
T = 125C, = 130C/W
JMAX JA
IN THE APPLICATIONS INFORMATION FOR IMPORTANT
SW PACKAGE
INFORMATION ON THE S8 DEVICE
16-LEAD PLASTIC SO
T = 125C, = 150C/W
JMAX JA
o r Der i n F
LEAD FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1054CN8#PBF LT1054CN8 8-Lead Plastic DIP 0C to 100C
LT1054IN8#PBF LT1054IN8 8-Lead Plastic DIP 40C to 100C
LT1054MJ8 LT1054MJ8 8-Lead Ceramic DIP 55C to 125C
LT1054CS8#PBF LT1054CS8#TRPBF 1054 8-Lead Plastic SO 0C to 100C
LT1054LCS8#PBF LT1054LCS8#TRPBF 1054L 8-Lead Plastic SO 0C to 100C
LT1054IS8#PBF LT1054IS8#TRPBF 1054I 8-Lead Plastic SO 40C to 100C
LT1054CSW#PBF LT1054CSW#TRPBF LT1054CSW 16-Lead Plastic SO 0C to 100C
LT1054ISW#PBF LT1054ISW#TRPBF LT1054ISW 16-Lead Plastic SO 40C to 100C
LT1054CJ8#PBF OBSOLETE PART LT1054CJ8#TRPBF LT1054CJ8 8-Lead Ceramic DIP 0C to 100C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: