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LT3582EUDTRPBF

Description
I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP
File Size368KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LT3582EUDTRPBF Overview

I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP

FEATURES
n
LT3582/LT3582-5/LT3582-12
I
2
C Programmable Boost
and Single Inductor Inverting
DC/DC Converters with OTP
DESCRIPTION
The LT
®
3582/LT3582-5/LT3582-12 are dual DC/DC convert-
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
the I
2
C interface, including output voltage settings, power
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.
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.
* Input thresholds are reduced to allow communication with low voltage digital ICs.
(See Electrical Characteristics).
**Patent Pending
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Output Voltages:
3.2V to 12.775V and –1.2V to –13.95V (LT3582)
5V and –5V (LT3582-5)
12V and –12V (LT3582-12)
Digitally Re-Programmable (LT3582) Via I
2
C for:
Output Voltages
Power Sequencing
Output Voltage Ramp Rates
Power-up Defaults Settable with Non-volatile OTP
(LT3582)
I
2
C Compatible Interface (Standard Mode*)
All Power Switches Integrated
350mA Current Limit (Boost)
600mA Current Limit (Inverting)
All Feedback Resistors Integrated
Input Voltage Range: 2.55V to 5.5V
Low Quiescent Current
325μA in Active Mode
0.01μA in Shutdown Mode
Integrated Output Disconnect
Tiny 16-pin 3mm × 3mm QFN Package
APPLICATIONS
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AMOLED Power
CCD Power
General Purpose DC/DC Conversion
TYPICAL APPLICATION
±12V Supplies from a Single 5V Input
SWN
6.8μH
SWN
SHDN
V
IN
SWP
GND
LT3582
1μF
4.7μF
6.8μH
EFFICIENCY (%)
75
65
150
55
45
35
0.1
1
10
LOAD CURRENT (mA)
100
50
0
100
3582512 TA01b
3582512 TA01a
Efficiency and Power Loss
95
INPUT
4.5V TO 5.5V
V
OUTP
V
OUTN
350
300
250
200
POWER LOSS (mW)
85
V
NEG
–12V
85mA
I
2
C
INTERFACE
10μF
V
OUTN
SDA
SCL
CA
CAPP
CAPP
V
OUTP
V
PP
RAMPP RAMPN
10nF
4.7μF
V
POS
12V
80mA
(
OPTIONAL ON
LT3582-5/LT3582-12
)
10nF
3582512f
1

LT3582EUDTRPBF Related Products

LT3582EUDTRPBF LT3582 LT3582-12 LT3582-5 LT3582EUD-12PBF LT3582EUD-12TRPBF LT3582EUD-5PBF LT3582EUD-5TRPBF LT3582EUDPBF
Description I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP
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