LT3582/LT3582-5/LT3582-12

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3582512f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

and Single Inductor Inverting

DC/DC Converters with OTP

ers featuring positive and negative outputs and integrated

feedback resistors. The LT3582, with its built in One Time

Programming (OTP), has configurable output settings via

up sequencing, power down discharge, and output voltage

ramp rates. LT3582 settings can be changed adaptively in

the final product, or set during manufacturing and made

permanent using the built in non-volatile OTP memory.

The positive output voltage can be set between 3.2V and

12.775V in 25mV steps. The negative output voltage can

be set between –1.2V and –13.95V in –50mV steps. The

LT3582-5 and LT3582-12 are pre-configured at the factory

for ±5V and ±12V outputs respectively.

The LT3582 series includes two monolithic converters,

one Boost and one Inverting. The Boost converter has an

integrated power switch and output disconnect switch.

The Inverting converter uses a single inductor topology

and includes an integrated power switch. Both Boost and

Inverting converters use a novel** control scheme result-

ing in low output voltage ripple while allowing for high

conversion efficiency over a wide load current range. The

LT3582 series is available in a 16-pin 3mm x 3mm QFN.

±12V Supplies from a Single 5V Input

3.2V to 12.775V and –1.2V to –13.95V (LT3582)

5V and –5V (LT3582-5)

12V and –12V (LT3582-12)

Output Voltages

Power Sequencing

Output Voltage Ramp Rates

(LT3582)

350mA Current Limit (Boost)

600mA Current Limit (Inverting)

325μA in Active Mode

0.01μA in Shutdown Mode

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Efficiency and Power Loss

LT3582

SWP

CAPP

–12V

85mA

CAPP

SDA

SCL

CA

GND

SWN

SWN

INTERFACE

SHDN

INPUT

4.5V TO 5.5V

12V

80mA

6.8μH

10μF

10nF

10nF

RAMPN

RAMPP

4.7μF

4.7μF

1μF

6.8μH

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OPTIONAL ON

LT3582-5/LT3582-12

()

* Input thresholds are reduced to allow communication with low voltage digital ICs.

(See Electrical Characteristics).

**Patent Pending

LOAD CURRENT (mA)

0.1

35

45

350

300

250

200

150

100

50

0

55

65

75

85

95

1

10

100

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