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LTC3526LEDC-2#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3526L-2/LTC3526LB-2
1
3526lb2fa
Typical applicaTion
DescripTion
FeaTures
applicaTions
550mA 2MHz Synchronous
Step-Up DC/DC Converters
in 2mm × 2mm DFN
The LTC
®
3526L-2/LTC3526LB-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
a 680mV 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 LTC3526L-2 features Burst Mode operation at light
load conditions allowing it to maintain high efficiency over
a wide range of load. The LTC3526LB-2 features fixed
frequency operation for low noise applications. Anti-ring
circuitry reduces EMI by damping the inductor in discon-
tinuous mode. Additional features include a low shutdown
current of under 1µA and thermal shutdown.
The LTC3526L-2/LTC3526LB-2 are housed in a 2mm ×
2mm × 0.75mm DFN package.
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
Medical Instruments
n
Noise Canceling Headphones
n
Wireless Mice
n
Bluetooth Headsets
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: 680mV
n
1.5V 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 I
Q
(LTC3526L-2)
n
Low Noise PWM Operation (LTC3526LB-2)
n
Internal Synchronous Rectifier
n
Logic Controlled Shutdown (I
Q
< 1µA)
n
Anti-Ring Control
n
Low Profile (2mm × 2mm × 0.75mm) 6-Lead
DFN Package
SW
V
IN
1.78M
1M
3526lb2 TA01a
LTC3526L-2
SHDN
V
OUT
FB
V
IN
1.6V TO 3.2V
V
OUT
3.3V
200mA
OFF ON
2.2µH
4.7µF
4.7µF
33pF
GND
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
3526lb2 TA01b
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
EFFICIENCY
POWER LOSS
V
IN
= 2.4V
Efficiency and Power Loss vs Load Current
LTC3526L-2/LTC3526LB-2
2
3526lb2fa
elecTrical characTerisTics
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.
pin conFiguraTionabsoluTe MaxiMuM raTings
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3526LEDC-2#PBF LTC3526LEDC-2#TRPBF LFFC
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 85°C
LTC3526LBEDC-2#PBF LTC3526LBEDC-2#TRPBF LFFD
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/
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
(Notes 2, 5) ..............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Input Voltage I
LOAD
= 1mA 0.68 0.8 V
Input Voltage Range After Start-Up. (Minimum Voltage is Load Dependent)
l
0.5 5 V
Output Voltage Adjust Range
l
1.5 5.25 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 (LTC3526L-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
550 750 mA
Current Limit Delay to Output (Note 3) 60 ns
Maximum Duty Cycle V
FB
= 1.15V, V
OUT
= 5V
l
87 90 %
Minimum Duty Cycle V
FB
= 1.3V
l
0 %
Switching Frequency
l
1.8 2 2.4 MHz
SHDN Pin Input High Voltage 0.8 V
SHDN Pin Input Low Voltage 0.3 V
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
LTC3526L-2/LTC3526LB-2
3
3526lb2fa
Typical perForMance characTerisTics
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 LTC3526LE-2/LTC3526LBE-2 are 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 (LTC3526L-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 3.3V (LTC3526L-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 5V (LTC3526L-2)
No-Load Input Current vs V
IN
(LTC3526L-2)
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
3526lb2 G01
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 0.9V
V
IN
= 1.2V
V
IN
= 1.5V
PLOSS AT V
IN
= 0.9V
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
3526lb2 G02
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 1.2V
V
IN
= 1.8V
V
IN
= 2.4V
V
IN
= 3.0V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 1.8V
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
3526lb2 G03
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
3526lb2 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)
0.65
LOAD (Ω)
100
1000
10000
1.050.950.75 1.150.85
3526lb2 G06
10
V
OUT
= 3.3V
elecTrical characTerisTics
T
A
= 25°C, unless otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3526LEDC-2#TRPBF

Mfr. #:
Buy LTC3526LEDC-2#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 550mA, 2MHz Synchronous Step-Up DC/DC Converters in 2mm x 2mm DFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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