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LT1054 Datasheet

Switched-Capacitor Voltage Converter with Regulator

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LT1054/LT1054L
Switched-Capacitor Voltage
Converter with Regulator
FEATURES
s Available in Space Saving SO-8 Package
s Output Current: 100mA (LT1054)
125mA (LT1054L)
s Low Loss: 1.1V at 100mA
s Operating Range:3.5V to 15V (LT1054)
3.5V to 7V (LT1054L)
s Reference and Error Amplifier for Regulation
s External Shutdown
s External Oscillator Synchronization
s Can Be Paralleled
s Pin Compatible with the LTC®1044/LTC7660
APPLICATI S
s Voltage Inverter
s Voltage Regulator
s Negative Voltage Doubler
s Positive Voltage Doubler
, LTC and LT are registered trademarks of Linear Technology Corporation.
DESCRIPTIO
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 adjust
the switching frequency or to externally synchronize the
LT1054.
The LT1054 is pin compatible with previous converters
such the LTC1044/LTC7660.
BLOCK DIAGRAM
VREF
6
REFERENCE
R
+
2.5V
1
FEEDBACK/
SHUTDOWN
R
OSC
7
OSC
VIN
8
DRIVE
CAP + 2
+
Q CIN*
Q
CAP4
DRIVE
DRIVE
*EXTERNAL CAPACITORS
DRIVE
3 GND
+
COUT*
5 –VOUT
LT1054 • BD
LT1054/LT1054L Voltage Loss
2
3.5V VIN 15V (LT1054)
3.5V VIN 7V (LT1054L)
CIN = COUT = 100µF
INDICATES GUARANTEED
TEST POINT
LT1054L
LT1054
1
TJ = 125°C
TJ = 25°C
TJ = –55°C
0
0 25 50 75 100 125
OUTPUT CURRENT (mA)
1054 TA01•
1


Linear Technology Electronic Components Datasheet

LT1054 Datasheet

Switched-Capacitor Voltage Converter with Regulator

No Preview Available !

LT1054/LT1054L
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage (Note 2)
LT1054 ................................................................ 16V
LT1054L ................................................................ 7V
Input Voltage
Pin 1 ................................................. 0V VPIN1 V+
Pin 3 (S Package) ............................. 0V VPIN3 V+
Pin 7 ............................................. 0V VPIN7 VREF
Pin 13 (S Package) ...................... 0V VPIN13 VREF
Operating Junction Temperature Range
LT1054C/LT1054LC ............................. 0°C to 100°C
LT1054I ........................................... – 40°C to 100°C
LT1054M ......................................... – 55°C to 125°C
Maximum Junction Temperature (Note 3)
LT1054C/LT1054LC ........................................ 125°C
LT1054I ............................................................ 125°C
LT1054M ......................................................... 150°C
Storage Temperature Range
H, J8, N8 and S8 Packages ................ –55°C to 150°C
S Package ........................................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO (Note 6)
TOP VIEW
V+
8
FB/SHDN 1
7 OSC
CAP+ 2
6 VREF
GND 3
5 VOUT
CASE
4
IS CAP
VOUT
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C, θJC = 45°C/W
ORDER PART
NUMBER
LT1054CH
LT1054MH
TOP VIEW
FB/SHDN 1
CAP+ 2
GND 3
CAP4
8 V+
7 OSC
6 VREF
5 VOUT
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 120°C/W
SEE REGULATION AND CAPACITOR SELECTION SECTIONS
IN THE APPLICATIONS INFORMATION FOR IMPORTANT
INFORMATION ON THE S8 DEVICE
FB/SHDN 1
CAP + 2
GND 3
CAP4
TOP VIEW
8 V+
7 OSC
6 VREF
5 VOUT
J8 PACKAGE
N8 PACKAGE
8-LEAD CERAMIC DIP 8-LEAD PLASTIC DIP
TJMAX = 150°C, θJA = 100°C/ W (J8)
TJMAX = 125°C, θJA = 130°C/ W (N8)
ORDER PART
NUMBER
LT1054CJ8
LT1054CN8
LT1054IN8
LT1054MJ8
TOP VIEW
NC 1
NC 2
FB/SHDN 3
CAP+ 4
GND 5
CAP6
NC 7
NC 8
16 NC
15 NC
14 V+
13 OSC
12 VREF
11 VOUT
10 NC
9 NC
SW PACKAGE
16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 150°C/W
ORDER PART
NUMBER
LT1054CS8
LT1054LCS8
S8 PART
MARKING
1054
1054L
ORDER PART
NUMBER
LT1054CSW
LT1054ISW
2


Part Number LT1054
Description Switched-Capacitor Voltage Converter with Regulator
Maker Linear Technology
Total Page 16 Pages
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