LT1054_15 Datasheet, PDF (1/33 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

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LT1054
SLVS033G – FEBRUARY 1990 – REVISED JULY 2015
LT1054 Switched-Capacitor Voltage Converters With Regulators
1 Features
•1 Output Current, 100 mA
• Low Loss, 1.1 V at 100 mA
• Operating Range, 3.5 V to 15 V
• Reference and Error Amplifier for Regulation
• External Shutdown
• External Oscillator Synchronization
• Devices Can Be Paralleled
• Pin-to-Pin Compatible With the LTC1044/7660
2 Applications
• Industrial Communications (RS232)
• Data Acquisition Supply
• Voltage Inverters
• Voltage Regulators
• Negative Voltage Doublers
• Positive Voltage Doublers
3 Description
The LT1054 device 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 optimizes 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 can also 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LT1054
PDIP (8)
SOIC (16)
9.50 mm × 6.35 mm
10.30 mm × 10.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Basic Voltage Inverter
+
10 μF
1
FB/SD
8
V_CC
2
CAP+
7
OSC
3
GND
LT1054
6
V_REF
4
CAP−
5
V_OUT
V_IN
+
2 μF
−V_OUT
+ ^{100 μF}
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.