LT1054MH Linear Technology Corporation, LT1054MH Datasheet

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LT1054MH

Manufacturer Part Number
LT1054MH
Description
CAN-8
Manufacturer
Linear Technology Corporation
Datasheets

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LT1054MH
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BLOCK
FEATURE
A
SHUTDOWN
FEEDBACK/
PPLICATI
, LTC and LT are registered trademarks of Linear Technology Corporation.
Voltage Inverter
Voltage Regulator
Negative Voltage Doubler
Positive Voltage Doubler
REFERENCE
Available in Space Saving SO-8 Package
Output Current: 100mA (LT1054)
Low Loss: 1.1V at 100mA
Operating Range:3.5V to 15V (LT1054)
Reference and Error Amplifier for Regulation
External Shutdown
External Oscillator Synchronization
Can Be Paralleled
Pin Compatible with the LTC
V
REF
6
1
*EXTERNAL CAPACITORS
DIAGRAM
R
R
S
+
O
U
125mA (LT1054L)
3.5V to 7V (LT1054L)
S
2.5V
OSC
7
W
OSC
®
1044/LTC7660
DRIVE
Q
Q
DRIVE
CAP
CAP
+
V
8
2
4
IN
+
C
IN
*
DRIVE
DRIVE
3
5
+
D
The LT
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 100 A.
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.
LT1054 • BD
Switched-Capacitor Voltage
GND
–V
C
OUT
OUT
ESCRIPTIO
*
®
Converter with Regulator
1054 is a monolithic, bipolar, switched-capacitor
2
1
0
U
0
3.5V V
3.5V V
C
LT1054/LT1054L Voltage Loss
IN
INDICATES GUARANTEED
TEST POINT
= C
25
OUT
IN
IN
OUTPUT CURRENT (mA)
LT1054/LT1054L
LT1054
= 100 F
15V (LT1054)
7V (LT1054L)
50
75
T
T
T
LT1054L
100
J
J
J
= 125 C
= 25 C
= –55 C
1054 TA01•
125
1

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