LT3489
1
3489f
AVDD LOAD CURRENT (mA)
0
EFFICIENCY (%)
65
70
75
300 500
3489 TA01b
60
55
50 100 200 400
80
85
90
700600
VON LOAD = 10mA
VOFF LOAD = 20mA
2MHz Boost DC/DC
Converter with 2.5A Switch
and Soft-Start
The LT®3489 is a fi xed frequency step-up DC/DC converter
containing an internal 2.5A, 40V switch. The LT3489 is
ideal for large TFT-LCD panel power supplies. The LT3489
switches at 2MHz, allowing the use of tiny, low profi le
inductors and low value ceramic capacitors. Loop com-
pensation can be either internal or external, giving the
user fl exibility in setting loop compensation and allow-
ing optimized transient response with low ESR ceramic
output capacitors. Soft-start is controlled with an external
capacitor, which determines the input current ramp rate
during start-up.
The 8-lead MS8E package and high switching frequency en-
sure a low profi le overall solution less than 1.1mm high.
■ TFT-LCD Bias Supplies
■ GPS Receivers
■ DSL Modems
■ Local Power Supply
■ 2.5A, 0.12Ω, 40V Internal Switch
■ 2MHz Switching Frequency
■ Integrated Soft-Start Function
■ V
IN Range: 2.6V to 16V
■ Adjustable Output from VIN to 40V
■ Low VCESAT Switch: 110mV at 1A (Typical)
■ 8V at 610mA from a 3.3V Input
■ Internal or External Loop Compensation
■ Small 8-Lead MS8E
Low Profi le, Triple Output TFT Supply (8V, –8V, 23V)
APPLICATIO S
U
FEATURES DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
VIN
VIN
3.3V
SW
FB
LT3489
2.2µH
5.23k
37.4k
28.7k
3489 TA01
20µF
220pF
0.1µF0.1µF 0.1µF
2µF
2µF
4.7µF
100nF
VOFF
–8V
20mA
AVDD
8V
610mA
VON
23V
10mA
0.1µF
VCGND
SHDN
SS
COMP
+
OFF ON
Effi ciency
LT3489
2
3489f
VIN Voltage ................................................................16V
SW Voltage ................................................ –0.4V to 40V
FB, VC, COMP, SS Voltages .........................................6V
SHDN Voltage ...........................................................16V
Current Into FB Pin ................................................±1mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
The
● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3V, VSHDN = VIN unless otherwise noted. (Note 2)
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3489E is guaranteed to meet performance specifi cations
from 0°C to 70°C. Specifi cations over the 40°C to 85°C operating
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.4 2.6 V
Maximum Operating Voltage 16 V
Feedback Voltage
●
1.22
1.21
1.235 1.26
1.26
V
V
FB Pin Bias Current VFB = 1.25V (Note 3) ●100 250 nA
Error Amp Transconductance ΔI = 10μA 100 μmhos
Error Amp Voltage Gain 80 V/V
Quiescent Current VSHDN = 2.5V, Not Switching 2 4 mA
Quiescent Current in Shutdown VSHDN = 0V, VIN = 3V 0 1 μA
Reference Line Regulation 2.6V ≤ VIN ≤ 16V 0.01 0.05 %
Switching Frequency ●1.8 2 2.2 MHz
Maximum Switch Duty Cycle ●85 90 %
Switch Current Limit (Note 4) ●2.5 3.5 5 A
Switch VCESAT ISW = 2A 0.23 V
Switch Leakage Current VSW = 5V 0.01 1 μA
SHDN Pin Current VSHDN = 5V
VSHDN = 1.4V
VSHDN = 0V
100
20
2
μA
μA
μA
SHDN Pin Threshold 0.3 1.5 2 V
Soft-Start Charging Current VSS = 0.5V 5 10 20 μA
ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
1
2
3
4
VC
FB
SHDN
GND
8
7
6
5
SS
COMP
VIN
SW
TOP VIEW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 9) IS GND (MUST BE SOLDERED TO PCB)
ORDER PART NUMBER MS8E PART MARKING
LT3489EMS8E LTBYF
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Current fl ows out of the FB pin.
Note 4: Current limit guaranteed by design and/or correlation to static test.
Current limit is independent of duty cycle and is guaranteed by design.
LT3489
3
3489f
TEMPERATURE (˚C)
–50
FEEDBACK VOLTAGE (V)
1.25
1.26
1.27
25 75
3489 G01
1.24
1.23
–25 0 50 100 125
1.22
1.21
TEMPERATURE (°C)
–50
1.6
OSCILLATOR FREQUENCY (MHz)
1.8
2.0
2.2
2.4
–25 0 25 50
3489 G02
75 100 125
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
1.5
2.0
2.5
25 75
3489 03
1.0
0.5
0–25 0 50
3.0
3.5
4.0
100
SWITCH CURRENT (A)
1
0
VCE(SAT) (mV)
100
200
300
400
500
600
0.5 1.0 1.5 2.0
3489 G04
2.5
–50°C
25°C
125°C
TEMPERATURE (˚C)
–50
QUIESCENT CURRENT (mA)
3.0
3.5
4.0
25 75
3489 G05
2.5
2.0
–25 0 50 100 125
1.5
1.0
VOUT
100mV/DIV
AC COUPLED
IL
1A/DIV
VSW
10V/DIV
200ns/DIVVIN = 3.3V
AVDD = 8V
ILOAD, AVDD = 400mA
VON = 23V, 10mA
VOFF = –8V, 20mA
3489 G06
Feedback Pin Voltage Oscillator Frequency Current Limit
Switch VCE(SAT) Voltage Quiescent Current
Switching Waveform for
the Cover Page Circuit
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TA = 25°C unless otherwise noted.
LT3489
4
3489f
PI FU CTIO S
UUU
BLOCK DIAGRA
W
VC (Pin 1): Error Amplifi er Output Pin. Tie external compen-
sation network to this pin, or use the internal compensation
network by shorting the VC pin to the COMP pin.
FB (Pin 2): Feedback Pin. Reference voltage is 1.235V.
Connect resistive divider tap here. Minimize the trace area at
FB. Set VOUT according to VOUT = 1.235 • (1 + R1/R2).
SHDN (Pin 3): Shutdown Pin. Tie to 2V or more to enable
device. Ground to shut down. Do not fl oat this pin.
GND (Pin 4): Ground. Tie directly to local ground plane.
SW (Pin 5): Switch Pin. This is the collector of the internal
NPN power switch. Minimize the metal trace area connected
to this pin to minimize EMI.
VIN (Pin 6): Input Supply Pin. Must be locally bypassed.
COMP (Pin 7): Internal Compensation Pin. Provides an
internal compensation network. Tie directly to the VC pin
for internal compensation. Tie to GND if not in use.
SS (Pin 8): Soft-Start Pin. Place a soft-start capacitor here.
Upon start-up, 10μA of current charges the capacitor to
1.8V. Use a larger capacitor for slower start-up. Leave
fl oating if not in use.
Exposed Pad (Pin 9): Ground. Must be soldered to
PCB.
Σ
–
+
–
+
A2
FB
SHDN
SHUTDOWN
VIN
DRIVER
Q1
0.01Ω
100k
125pF SW
GND
COMPARATOR
5
VC
1
COMP
4
S
RQ
RAMP
GENERATOR
2MHz
OSCILLATOR
–
+
23
1.235V
REFERENCE
6
SS +
8
7
R1 (EXTERNAL)
FB
VOUT
R2 (EXTERNAL)
A1
GND
9
3489 F01
Figure 1. Block Diagram
LT3489
5
3489f
OPERATIO
U
The LT3489 uses a constant frequency, current mode con-
trol scheme to provide excellent line and load regulation.
Please refer to Figure 1 for the following description of the
part’s operation. At the start of the oscillator cycle, the SR
latch is set, turning on the power switch, Q1. The switch
current fl ows through the internal current sense resistor
generating a voltage. This voltage is added to a stabilizing
ramp and the resulting sum is fed into the positive terminal
of the PWM comparator, A2. When this voltage exceeds
the level at the negative input of A2, the SR latch is reset,
turning off the power switch. The level at the negative
input of A2 (VC pin) is set by the error amplifi er (gm) and
is simply an amplifi ed version of the difference between
the feedback voltage and the reference voltage of 1.235V.
In this manner, the error amplifi er sets the correct peak
current level to keep the output in regulation.
A soft-start function is provided to enable a clean start-up
for the LT3489. When the part is brought out of shut-
down, 10µA of current is sourced out of the SS pin. By
connecting an external capacitor to the SS pin, the rate
of voltage rise on the pin can be set. Typical values for
the soft-start capacitor range from 10nF to 200nF. The SS
pin indirectly limits the rate of rise on the VC pin, which
in turn limits the peak switch current. Current limit is
not shown in Figure 1. The switch current is constantly
monitored and not allowed to exceed the nominal value
of 2.5A. If the switch current reaches 2.5A, the SR latch
is reset regardless of the output of comparator A2. This
current limit helps protect the power switch as well as the
external components connected to the LT3489.
LT3489
6
3489f
Inductor Selection
Several inductors that work well with the LT3489 are listed
in Table 1. This table is not exclusive; there are many other
manufacturers and inductors that can be used. Consult
each manufacturer for more detailed information and for
their entire selection of related parts, as many different
sizes and shapes are available. Ferrite core inductors
should be used to obtain the best effi ciency, as core
losses at 2MHz are much lower for ferrite cores than for
the cheaper powdered-iron ones. Choose an inductor that
can handle at least 2.5A without saturating, and ensure
that the inductor has a low DCR (copper wire resistance)
to minimize I2R power losses. A 2.2μH to 5μH inductor
will be the best choice for most LT3489 designs. Note
that in some applications, the current handling require-
ments of the inductor can be lower, such as in the SEPIC
topology where each inductor only carries one-half of the
total switch current. The inductors shown in Table 1 were
chosen for small size. For better effi ciency, use similar
valued inductors with a larger volume.
Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used at the output to minimize the output ripple voltage.
Multilayer ceramic capacitors are an excellent choice, as
they have an extremely low ESR and are available in very
small packages. X5R or X7R dielectrics are preferred, as
these materials retain the capacitance over wide voltage
and temperature ranges. A 4.7µF to 20µF output capacitor
is suffi cient for most applications, but systems with very
low output currents may need only a 1µF or 2.2µF output
capacitor. Solid tantalum or OS-CON capacitors can be
used, but they will occupy more board area than a ceramic
and will have a higher ESR. Always use a capacitor with a
suffi cient voltage rating.
Ceramic capacitors also make a good choice for the input
decoupling capacitor, which should be placed as close as
possible to the LT3489. A 2.2μF to 4.7μF input capacitor
is suffi cient for most applications. Table 2 shows a list
of several ceramic capacitor manufacturers. Consult the
manufacturers for detailed information on their entire
selection of ceramic parts.
APPLICATIO S I FOR ATIO
WUUU
Table 1. Recommended Inductors
PART L (μH) TYPICAL DCR (mΩ)
SIZE
L × W × H (mm) VENDOR
SD25-2R2
SD25-3R3
SD25-4R7
2.2
3.3
4.7
31
38
47
5.45 × 5.45 × 2.7 CooperBussmann
(888) 414-2645
www.cooperet.com
A916CY-2R7M
A916CY-3R3M
A916CY-4R7M
2.7
3.3
4.7
18.3
21.4
26.3
6 × 6 × 3.5 Toko
www.toko.com
LQH55DN2R2M03
LQH55DN3R3M03
LQH55DN4R7M03
2.2
3.3
4.7
29
36
41
5.7 × 5 × 4.7 Murata
(770) 436-1300
www.murata.com
Table 2. Ceramic Capacitor Manufacturers
Taiyo Yuden (408) 573-4150
www.t-yuden.com
AVX (843) 448-9411
www.avxcorp.com
Murata (770) 436-1300
www.murata.com
LT3489
7
3489f
Diode Selection
Schottky diodes, with their low forward voltage drop and
fast switching speed, are ideal for LT3489 applications.
Table 3 lists several Schottky diodes that work well with the
LT3489. The diode’s average current rating must exceed
the average output current. The diode’s maximum reverse
voltage must exceed the output voltage. The diode conducts
current only when the power switch is turned off (typically
less than 50% duty cycle), so a 3A diode is suffi cient for
most designs. The companies below also offer Schottky
diodes with high voltage and current ratings.
APPLICATIO S I FOR ATIO
WUUU
Frequency Compensation
To compensate the feedback loop of the LT3489, a series
resistor-capacitor network should be connected from the
COMP pin to GND. For most applications, a capacitor in
the range of 220pF to 680pF will suffi ce. A good starting
value for the compensation capacitor, CC, is 470pF. The
compensation resistor, RC, is usually in the range of 20k
to 100k. A thorough analysis of the switching regulator
control loop is not within the scope of this data sheet and
will not be presented here, but values of 20k and 680pF
will be a good choice for many designs.
Table 3. Suggested Diodes
MANUFACTURER
PART NUMBER
MAXIMUM
CURRENT (A)
MAXIMUM
REVERSE
VOLTAGE (V) MANUFACTURER
UPS340
UPS315
3
3
40
15
Microsemi
www.microsemi.com
B220
B230
B240
B320
B330
B340
SBM340
2
2
2
3
3
3
3
20
30
40
20
30
40
40
Diodes, Inc
www.diodes.com
Setting Output Voltage
To set the output voltage, select the values of R1 and R2
(see Figure 1) according to the following equation:
RR V
V
OUT
121 235 1=−
⎛
⎝
⎜⎞
⎠
⎟
•.
A good range for R2 is from 5k to 30k.
Board Layout
The high speed operation of the LT3489 demands care-
ful attention to board layout. For high-current switching
regulators like the LT3489, the board layout must have
good thermal performance. Vias located underneath the
part should be connected to an internal ground plane to
improve heat transfer from the LT3489 to the PCB board.
You will not get advertised performance with careless lay-
out. Thermal and noise consideration must be taken into
account. Figure 2 shows the recommended component
placement for a boost converter.
1
2
8
7
3
4
6
5
L1
C2
LT3489
VOUT
VIN
GND
SHUTDOWN
R1
R2
MULTIPLE
VIAs
GROUND PLANE
3489 F02
C1
CSS
CC
RC
+
Figure 2. Recommended Component Placement for Boost Converter.
Note Direct High Current Paths Using Wide PC Traces. Minimize
Trace Area at Pin 1 (VC) and Pin 2 (FB). Use Multiple Vias to Tie
Pin 4 Copper to Ground Plane. Use Vias at One Location Only to
Avoid Introducing Switching Currents Into the Ground Plane
LT3489
8
3489f
LOAD CURRENT (A)
0
EFFICIENCY (%)
75
80
85
1.1
3489 TA09
65
50 0.2 0.30.1 0.4 0.60.5 0.80.7 1.00.9
90
70
60
55 VIN = 3.3V
VIN = 5V
VIN
VIN
3.3V TO 5V
SW
FB
3
8
7
14
2
65
LT3489
L1
2.2µHD1
R2
5.23k
R1
28.7k
RC
35.7k
3489 TA02
C2
20µF
C1
4.7µF
CC
330pF
CSS
100nF
VOUT
650mA, VIN = 3.3V
1.1A, VIN = 5V
VCGND
SHDN
SS
COMP
C1: AVX 08056D475KAT
C2: 2 × 10µF, TAIYO YUDEN LMK3168BJ106ML
D1: DIODES INC. DFLS220L
L1: COOPER BUSSMANN SD25-2R2
*EXPOSED PAD MUST ALSO BE GROUNDED
+
OFF ON
TYPICAL APPLICATIO S
U
8V Output Boost Converter
Effi ciency Transient Response
VOUT
100mV/DIV
AC COUPLED
IL1
1A/DIV
400mA
IOUT
200mA
50µs/DIVVIN = 3.3V 3489 G10
LT3489
9
3489f
VIN
VIN
3.3V TO 5V
SW
FB
LT3489
L1
3.3µHD1
CSS
100nF
CC
680pF
RC
16.5k
VOUT
12V
625mA, VIN = 5V
410mA, VIN = 3.3V
3489 TA03
C2
10µF
C1
4.7µFVC
GNDCOMPSS
SHDN
3
65
478
21
C1: Taiyo Yuden JMK212BJ475MG, 4.7µF, 6.3V
C2: Taiyo Yuden GMK316BJ106ML, 10µF, 35V
D1: Diodes, Inc. DFLS220
L1: Toko A916CY-3R3M (Type D63CB)
R1
84.5k
R2
9.76k
OFF ON
12V Output Boost Converter
TYPICAL APPLICATIO S
U
Effi ciency Transient Response
LOAD CURRENT (A)
0
40
EFFICIENCY (%)
45
55
60
65
90
75
0.2 0.4 0.5
3489 TA05
50
80
85
70
0.1 0.3 0.6 0.7
VIN = 3.3V
VIN = 5V
VOUT
500mV/DIV
AC COUPLED
IL1
1A/DIV
300mA
IOUT
100mA
50µs/DIVVIN = 3.3V 3489 TA06
LT3489
10
3489f
AVDD LOAD CURRENT (mA)
0
EFFICIENCY (%)
65
70
75
300 500
3489 TA01b
60
55
50 100 200 400
80
85
90
700600
VON LOAD = 10mA
VOFF LOAD = 20mA
TYPICAL APPLICATIO
U
VIN
VIN
3.3V
SW
FB
LT3489
L1
2.2µHD1
R3
5.23k
R2
28.7k
3489 TA04
C2
20µF
C5
0.1µF
C6
0.1µF
C7
0.1µF
C4
2µF
C3
2µF
C1
4.7µF
CSS
100nF
D7
D2 D3
VOFF
–8V
20mA
AVDD
8V
610mA
VON
23V
10mA
D6
C8
0.1µF
VCGND*
SHDN
3
8
7
14
2
56
SS
COMP
+
D4 D5
C1 TO C8: X5R OR X7R
C1: AVX 08056D475KAT
C2: 2 × 10µF, TAIYO YUDEN LMK316BJ106ML
C3: 2 × 10µF, 10V
C4: 2 × 1µF, AVX08053D105KAT
C5, C6, C7: 0.1µF, 10V
C8: 0.1µF, 16V
D1: DIODES INC. DFLS220L
D2 TO D7: ZETEX BAT54S OR EQUIVALENT
L1: COOPER BUSSMANN SD25-2R2
* EXPOSED PAD MUST ALSO BE GROUNDED
OFF ON
10mA
37.4k
220pF
Transient Response Start-Up Waveforms
AVDD
100mV/DIV
AC COUPLED
IL1
1A/DIV
400mA
ILOAD
200mA
5µs/DIV 3489 TA07
AVDD
5V/DIV
VON
20V/DIV
VOFF
5V/DIV
IIN
0.5A/DIV
5ms/DIV 3489 TA08
Effciency
LT3489
11
3489f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTIO
U
MS8E Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1662)
MSOP (MS8E) 0603
0.53 ± 0.152
(.021 ± .006)
SEATING
PLANE
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.18
(.007)
0.254
(.010)
1.10
(.043)
MAX
0.22 – 0.38
(.009 – .015)
TYP
0.127 ± 0.076
(.005 ± .003)
0.86
(.034)
REF
0.65
(.0256)
BSC
0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
12
34
4.90 ± 0.152
(.193 ± .006)
8
8
1
BOTTOM VIEW OF
EXPOSED PAD OPTION
765
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
0.52
(.0205)
REF
1.83 ± 0.102
(.072 ± .004)
2.06 ± 0.102
(.081 ± .004)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
2.083 ± 0.102
(.082 ± .004)
2.794 ± 0.102
(.110 ± .004)
0.889 ± 0.127
(.035 ± .005)
RECOMMENDED SOLDER PAD LAYOUT
0.42 ± 0.038
(.0165 ± .0015)
TYP
0.65
(.0256)
BSC
LT3489
12
3489f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 0606 • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LT1613 550mA (ISW), 1.4MHz, High Effi ciency Step-Up
DC/DC Converter
VIN: 0.9V to 10V, VOUT(MAX) = 34V, IQ = 3mA, ISD = <1μA,
ThinSOTTM Package
LT1615/LT1615-1 300mA/80mA (ISW), High Effi ciency Step-Up
DC/DC Converters
VIN: 1V to 15V, VOUT(MAX) = 34V, IQ = 20μA, ISD = <1μA,
ThinSOT Package
LT1618 1.5A (ISW), 1.25MHz, High Effi ciency Step-Up
DC/DC Converter
VIN: 1.6V to 18V, VOUT(MAX) = 35V, IQ = 1.8mA, ISD = <1μA,
MS Package
LT1930/LT1930A 1A (ISW), 1.2MHz/2.2MHz, High Effi ciency Step-Up
DC/DC Converters
VIN: 2.6V to 16V, VOUT(MAX) = 34V, IQ = 4.2mA/5.5mA, ISD = <1μA,
ThinSOT Package
LT1935 2A (ISW), 1.2MHz/2.7MHz, High Effi ciency Step-Up
DC/DC Converter
VIN: 2.3V to 16V, VOUT(MAX) = 38V, IQ = 3mA, ISD = <1μA,
ThinSOT Package
LT1946/LT1946A 1.5A (ISW), 1.2MHz, High Effi ciency Step-Up
DC/DC Converters
VIN: 2.45V to 16V, VOUT(MAX) = 34V, IQ = 3.2mA, ISD = <1μA,
MS8 Package
LT1961 1.5A (ISW), 1.25MHz, High Effi ciency Step-Up
DC/DC Converter
VIN: 3V to 25V, VOUT(MAX) = 35V, IQ = 0.9mA, ISD = 6μA,
MS8E Package
LT3436 3A (ISW), 1MHz, 34V Step-Up DC/DC Converter VIN: 3V to 25V, VOUT(MAX) = 34V, IQ = 0.9mA, ISD = <6μA,
TSSOP-16E Package
LT3464 85mA (ISW), High Effi ciency Step-Up DC/DC Converter
with Integrated Schottky and PNP Disconnect
VIN: 2.3V to 10V, VOUT(MAX) = 34V, IQ = 25μA, ISD = <1μA,
ThinSOT Package
LT3467/LT3467A 1.1A (ISW), 1.3MHz/2.7MHz, High Effi ciency Step-Up
DC/DC Converters
VIN: 2.6V to 16V, VOUT(MAX) = 40V, IQ = 1.2mA, ISD = <1μA,
ThinSOT Package
LT3477 3A (ISW), 3.5MHz, High Effi ciency Step-Up DC/DC
Converter with Dual Rail-to-Rail Current Sense
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD = <1μA, QFN,
TSSOP-20E Packages
LT3479 3A (ISW), 3.5MHz, High Effi ciency Step-Up
DC/DC Converter
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD = <1μA, DFN.
TSSOP-16E Packages
ThinSOT is a trademark of Linear Technology Corporation.
RELATED PARTS
