Converters. LT3582-5 Datasheet

LT3582-5 Datasheet PDF

Part LT3582-5
Description Boost and Single Inductor Inverting DC/DC Converters
Feature www.DataSheet4U.com FEATURES n LT3582/LT3582-5/LT3582-12 I2C Programmable Boost and Single Inducto.
Manufacture Linear Technology Corporation
Datasheet
Download LT3582-5 Datasheet





LT3582-5
LT3582/LT3582-5/LT3582-12
Boost and Single Inductor
Inverting DC/DC Converters with
Optional I2C Programing and OTP
FEATURES
DESCRIPTION
n Output Voltages:
3.2V to 12.775V and –1.2V to –13.95V (LT3582)
5V and –5V (LT3582-5)
12V and –12V (LT3582-12)
n Digitally Re-Programmable (LT3582) via I2C for:
Output Voltages
Power Sequencing
Output Voltage Ramp Rates
n Power-Up Defaults Settable with Non-Volatile OTP
(LT3582)
n I2C Compatible Interface (Standard Mode*)
n All Power Switches Integrated
350mA Current Limit (Boost)
600mA Current Limit (Inverting)
n All Feedback Resistors Integrated
n Input Voltage Range: 2.55V to 5.5V
n Low Quiescent Current
325μA in Active Mode
0.01μA in Shutdown Mode
n Integrated Output Disconnect
n Tiny 16-Pin 3mm × 3mm QFN Package
APPLICATIONS
n AMOLED Power
n CCD Power
n General Purpose DC/DC Conversion
The LT®3582/LT3582-5/LT3582-12 are dual DC/DC converters
featuringpositiveandnegativeoutputsandintegratedfeedback
resistors. The LT3582, with its built-in One Time Programming
(OTP), has configurable output settings via the I2C interface,
including output voltage settings, power-up sequencing,
power-downdischarge,andoutputvoltageramprates.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
–50mVsteps.TheLT3582-5andLT3582-12arepre-configured
at the factory for ±5V and ±12V outputs respectively, and as
such, don’t require the use of the I2C interface.
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
resulting 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 × 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
TYPICAL APPLICATION
±12V Supplies from a Single 5V Input
6.8μH
SWN
SWN
SHDN
VIN
SWP
6.8μH
INPUT
4.5V TO 5.5V
VNEG
–12V
85mA
I2C
 INTERFACE
OPTIONAL ON
LT3582-5/LT3582-12
10μF
GND
LT3582
VOUTN
SDA
CAPP
CAPP
VOUTP
SCL VPP
CA RAMPP RAMPN
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4.7μF
1μF
4.7μF
VPOS
12V
80mA
10nF 10nF
Efficiency and Power Loss
95
VOUTP
VOUTN
85
350
300
250
75
200
65
150
55
100
45 50
35
0.1
1 10
LOAD CURRENT (mA)
0
100
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1



LT3582-5
LT3582/LT3582-5/LT3582-12
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN Voltage..................................................................6V
SWP Voltage.............................................................15V
SWN Voltage........................................................ –16.5V
CAPP Voltage............................................................15V
CAPP-VOUTP Voltage.................................... –0.8V to 8V
ICAPP-VOUTP....................................................... ±300mA
VOUTP Voltage ...........................................................15V
VOUTN Voltage...................................................... –16.5V
RAMPP Voltage ..........................................................3V
RAMPN Voltage ..........................................................3V
SHDN Voltage ................................................ –0.5 to 6V
VPP Voltage...................................................–0.2 to 16V
SDA, CA, SCL Voltage.................................... –0.5 to 6V
Operating Junction Temperature Range (Notes 3, 5)
LT3582E ............................................ –40°C to 125°C
Storage Temperature Range .............. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
16 15 14 13
CA 1
12 SWP
VOUTN 2 17 11 CAPP
SWN 3 GND 10 CAPP
SWN 4
9 VOUTP
5678
UD PACKAGE
16-PIN (3mm × 3mm) PLASTIC QFN
TJMAX = 125°C, θJA = 68°C/W
EXPOSED PAD (PIN #17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3582EUD#PBF
LT3582EUD#TRPBF
LDDB
16-Pin (3mm × 3mm) Plastic QFN
LT3582EUD-5#PBF
LT3582EUD-5#TRPBF LDVG
16-Pin (3mm × 3mm) Plastic QFN
LT3582EUD-12#PBF
LT3582EUD-12#TRPBF LDVH
16-Pin (3mm × 3mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, VSHDN = VIN unless otherwise noted. (Note 3)
Switching Regulator Characteristics
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN_MIN
VIN_MAX
IVIN
Minimum Operating Voltage
Maximum Operating Voltage
VIN Quiescent Current
Ramp Current Configured to 1μA,
SWOFF Bit Active
l 2.4
l 5.5
2.475 2.55
325 450
V
V
μA
IVIN_SHDN
ICAPP_SHDN
TOFF_MINP
TOFF_MINN
VIN Quiescent Current in Shutdown
CAPP Quiescent Current in Shutdown
Minimum Switch Off Time
Minimum Switch Off Time
VSHDN = 0
VSHDN = 0, VCAPP = 5.0V, VOUTP = 0V
Boost Switch
Inverting Switch
0.01 0.5
0 0.5
100
125
μA
μA
ns
ns
2
3582512fb




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