LT1054MH Linear Technology Corporation, LT1054MH Datasheet

LT1054MH

Manufacturer Part Number

LT1054MH

Description

CAN-8

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1054MH.pdf (16 pages)

2.LT1054MH.pdf (16 pages)

3.LT1054MH.pdf (16 pages)

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Download datasheet (335Kb)

BLOCK

FEATURE

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

REF

*EXTERNAL CAPACITORS

DIAGRAM

–

125mA (LT1054L)

3.5V to 7V (LT1054L)

2.5V

OSC

1044/LTC7660

DRIVE

CAP

–

DRIVE

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

OUT

ESCRIPTIO

Converter with Regulator

1054 is a monolithic, bipolar, switched-capacitor

3.5V V

LT1054/LT1054L Voltage Loss

INDICATES GUARANTEED

TEST POINT

= C

OUT

OUTPUT CURRENT (mA)

LT1054/LT1054L

LT1054

= 100 F

15V (LT1054)

7V (LT1054L)

LT1054L

100

= 125 C

= 25 C

= –55 C

1054 TA01•

125

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