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LTC3526EDC-2#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3526-2/LTC3526B-2
1
35262b2fc
n
Medical Instruments
n
Flash-Based MP3 Players
n
Noise Canceling Headphones
n
Wireless Mice
n
Bluetooth Headsets
ApplicAtions
500mA 2MHz Synchronous
Step-Up DC/DC Converters
in 2mm × 2mm DFN
The LTC
®
3526-2/LTC3526B-2 are synchronous, fixed
frequency step-up DC/DC converters with output discon-
nect. Synchronous
rectification enables high efficiency
in the low profile 2mm
× 2mm DFN
package. Battery life
in single AA/AAA powered products is extended further
with an 850mV start-up voltage and operation down to
500mV once started.
A switching frequency of 2MHz minimizes solution foot
-
print by
allowing the use of tiny, low profile inductors
and ceramic capacitors. The current mode PWM design
is internally compensated, reducing external parts count.
The LTC3526-2 features Burst Mode operation at light load
conditions, while the LTC3526B-2 features continuous
switching. Anti-ring circuitry eliminates EMI concerns by
damping the inductor in discontinuous mode. Additional
features include a low shutdown current of under 1µA and
thermal shutdown.
The LTC3526-2/LTC3526B-2 are housed in a 6-pin
2mm ×
2mm
× 0.75mm DFN package.
For new designs, we recommend the LTC3526L-2/
LTC3526LB-2.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Patents pending.
n
Delivers 3.3V at 100mA from a Single Alkaline/
NiMH Cell or 3.3V at 200mA from Two Cells
n
V
IN
Start-Up Voltage: 850mV
n
V
IN
Operating Range: 0.5V to 5V
n
1.6V to 5.25V V
OUT
Range
n
Up to 94% Efficiency
n
Output Disconnect
n
2MHz Fixed Frequency Operation
n
V
IN
> V
OUT
Operation
n
Integrated Soft-Start
n
Current Mode Control with Internal Compensation
n
Burst Mode
®
Operation with 9µA Quiescent Current
(LTC3526-2)
n
Low Noise PWM Operation (LTC3526B-2)
n
Internal Synchronous Rectifier
n
Logic Controlled Shutdown (I
Q
< 1µA)
n
Anti-Ringing Control
n
Low Profile (2mm × 2mm × 0.75mm) DFN-6 Package
SW
V
IN
1.78M
2.2µH
1M
1µF
4.7µF
35262b2 TA01a
LTC3526-2
SHDN
V
OUT
FB
V
IN
1.6V TO 3.2V
V
OUT
3.3V
200mA
OFF ON
GND
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
35262b2 TA01b
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
EFFICIENCY
POWER LOSS
V
IN
= 2.4V
LTC3526-2 Efficiency and Power Loss vs Load Current
typicAl ApplicAtion
FeAtures Description
NOT RECOMMENDED FOR NEW DESIGNS
Contact Linear Technology for Potential Replacement
LTC3526-2/LTC3526B-2
2
35262b2fc
V
IN
Voltage ................................................... –0.3V to 6V
SW Voltage
DC ............................................................ –0
.3V to 6V
Pulsed <100ns ......................................... –0.3V to 7V
SHDN,
FB Voltage ........................................ –0.3V to 6V
V
OUT
............................................................. –0.3V to 6V
Operating Temperature Range (Note 2) ...–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
The
l denotes the specifications which apply over the specified operating
temperature range of –40°C to 85°C, otherwise specifications are at T
A
= 25°C. V
IN
= 1.2V, V
OUT
= 3.3V unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Input Voltage I
LOAD
= 1mA 0.85 1 V
Output Voltage Adjust Range
0°C
to 85°C
l
1.7
1.6
5.25
5.25
V
V
Feedback
Pin Voltage
l
1.165 1.195 1.225 V
Feedback Pin Input Current V
FB
= 1.30V 1 50 nA
Quiescent Current—Shutdown V
SHDN
= 0V, Not Including Switch Leakage, V
OUT
= 0V 0.01 1 µA
Quiescent Current—Active Measured on V
OUT
, Nonswitching 250 500 µA
Quiescent Current—Burst Measured on V
OUT
, FB > 1.230V (LTC3526-2 Only) 9 18 µA
N-Channel MOSFET Switch Leakage Current V
SW
= 5V 0.1 5 µA
P-Channel MOSFET Switch Leakage Current V
SW
= 5V, V
OUT
= 0V 0.1 10 µA
N-Channel MOSFET Switch On Resistance V
OUT
= 3.3V 0.4
Ω
P-Channel
MOSFET Switch On Resistance V
OUT
= 3.3V 0.6
Ω
N-Channel
MOSFET Current Limit
l
500 700 mA
Current Limit Delay to Output (Note 3) 60 ns
Maximum
Duty Cycle V
FB
= 1.15V, V
OUT
= 5V
l
85 90 %
Minimum Duty Cycle V
FB
= 1.3V
l
0 %
Switching Frequency
l
1.8 2 2.4 MHz
SHDN Pin
Input High Voltage 0.9 V
SHDN Pin
Input Low Voltage 0.3 V
SHDN Pin
Input Current V
SHDN
= 1.2V
V
SHDN
= 3.3V
0.3
1
1
2
µA
µA
TOP VIEW
V
OUT
FB
SHDN
SW
GND
V
IN
DC PACKAGE
6-LEAD (2mm s 2mm) PLASTIC DFN
7
1
2
3
6
5
4
T
JMAX
= 125°C, θ
JA
= 102°C/W (NOTE 6)
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PC BOARD
pin conFigurAtionAbsolute MAxiMuM rAtings
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3526EDC-2#PBF LTC3526EDC-2#TRPBF LCNM
6-Lead
(2mm × 2mm)
Plastic DFN
–40°C to 85°C
LTC3526BEDC-2#PBF LTC3526BEDC-2#TRPBF LCNP
6-Lead
(2mm × 2mm)
Plastic DFN
–40°C to 85°C
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/
orDer inForMAtion
electricAl chArActeristics
LTC3526-2/LTC3526B-2
3
35262b2fc
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
LTC3526E-2 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Specification
is guaranteed by design and not 100% tested in
production.
Note 4: Current
measurements are made when the output is not switching.
Note 5: This
IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 6: Failure
to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
102°C/W.
Efficiency vs Load Current and V
IN
for V
OUT
= 1.8V (LTC3526-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 3.3V (LTC3526-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 5V (LTC3526-2)
No-Load Input Current vs V
IN
Maximum Output Current vs V
IN
Minimum Load Resistance
During Start-Up vs V
IN
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
35262b2 G01
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 1.0V
V
IN
= 1.2V
V
IN
= 1.5V
PLOSS AT V
IN
= 1.0V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 1.5V
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
35262b2 G02
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.0V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 2.4V
PLOSS AT V
IN
= 3.0V
V
IN
(V)
0.5
I
IN
(µA)
60
70
80
4.5
35262b2 G04
50
40
10
1.5
2.5
3.5
1.0
2.0
3.0
4.0
30
20
100
90
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
IN
(V)
0.5
I
OUT
(mA)
200
300
4.5
35262b2 G05
100
0
1.5
2.5
3.5
1.0
2.0
3.0
4.0
400
150
250
50
350
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 2.5V
V
OUT
= 1.8V
L = 2.2µH
V
IN
(V)
0.95
10
100
1000
1.05
1.15
35262b2 G06
LOAD (Ω)
0.85
1.25
electricAl chArActeristics
typicAl perForMAnce chArActeristics
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3526EDC-2#TRMPBF

Mfr. #:
Buy LTC3526EDC-2#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 500mA, 2MHz Synch Step -Up in DFN
Lifecycle:
New from this manufacturer.
Delivery:
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