LTC3539EDCB-2#TRMPBF Linear Technology, LTC3539EDCB-2#TRMPBF Datasheet

IC DC/DC CONV 2A SYNC 8-DFN

LTC3539EDCB-2#TRMPBF

Manufacturer Part Number
LTC3539EDCB-2#TRMPBF
Description
IC DC/DC CONV 2A SYNC 8-DFN
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LTC3539EDCB-2#TRMPBF

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
1.5 ~ 5.25 V
Current - Output
2A
Frequency - Switching
2MHz
Voltage - Input
0.5 ~ 5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-DFN
Primary Input Voltage
1.2V
No. Of Outputs
1
Output Voltage
5.25V
Output Current
2.6A
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC3539EDCB-2#TRMPBFLTC3539EDCB-2
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC3539EDCB-2#TRMPBFLTC3539EDCB-2
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC3539EDCB-2#TRMPBFLTC3539EDCB-2#TRPBF
Manufacturer:
LT
Quantity:
20 000
Company:
Part Number:
LTC3539EDCB-2#TRMPBFLTC3539EDCB-2#TRPBF
0
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells
Delivers 5V at 900mA From a Lithium-Polymer
Battery
V
1.5V to 5.25V V
Up to 94% Effi ciency
V
1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed
Frequency Operation
Output Disconnect
Selectable Burst Mode
10μA Quiescent Current
Logic Controlled Shutdown: <1μA
Requires Only 6 External Components
Low Profi le (2mm × 3mm × 0.75mm) DFN Package
Medical Instruments
Portable Bar Code Scanners
Noise Canceling Headphones
Portable GPS Navigation
Handheld PCs
1.8V TO 3.6V
IN
IN
Start-Up Voltage: 700mV
> V
V
OUT
IN
PWM
Operation
Wide V
OFF
BURST
2.2μF
ON
OUT
IN
, High Power 3.3V Regulator
Range
V
MODE
SHDN
®
IN
GND
or PWM Operation
LTC3539
4.7μH
PGND
V
OUT
SW
FB
1M
562k
33pF
3539 TA01a
22μF
2
V
3.3V
600mA
OUT
DESCRIPTION
The LTC
DC/DC converters with output disconnect. Synchronous
rectifi cation enables high effi ciency in the low profi le
2mm × 3mm DFN package. Battery life is extended with
a 700mV start-up voltage and operation down to 500mV
once started.
A switching frequency of 1MHz (LTC3539) or 2MHz
(LTC3539-2) minimizes solution footprint by allowing the
use of tiny, low profi le inductors and ceramic capacitors.
The current mode PWM design is internally compensated,
reducing external parts count. The LTC3539/LTC3539-2
feature a pin-enabled automatic Burst Mode operation at
light load conditions. Anti-ring circuitry reduces EMI by
damping the inductor in discontinuous mode. Additional
features include a low shutdown current of under 1μA and
thermal overload protection.
The LTC3539/LTC3539-2 are offered in a 2mm × 3mm ×
0.75mm DFN package.
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
®
3539/LTC3539-2 are synchronous, 2A step-up
100
Synchronous Step-Up
90
80
70
60
50
40
30
20
10
0
0.1
V
V
IN
OUT
DC/DC Converters
LTC3539/LTC3539-2
Effi ciency and Power Loss vs
= 2.4V
= 3.3V
1
I
LOAD
Load Current
2A, 1MHz/2MHz
EFFICIENCY
AVERAGE (mA)
10
FREQUENCY = 1MHz
FREQUENCY = 2MHz
POWER LOSS
100
3539 TA01b
1000
1000
100
10
1
0.1
35392fa
1

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LTC3539EDCB-2#TRMPBF Summary of contents

Page 1

... The LTC3539/LTC3539-2 are offered in a 2mm × 3mm × 0.75mm DFN package. L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 100 90 ...

Page 2

... TAPE AND REEL LTC3539EDCB#PBF LTC3539EDCB#TRPBF LTC3539EDCB-2#PBF LTC3539EDCB-2#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ELECTRICAL CHARACTERISTICS temperature range of – ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range of –40°C to 85°C, otherwise specifi cations are at T PARAMETER Maximum Duty Cycle Minimum Duty Cycle Switching Frequency MODE Input High Voltage MODE Input Low Voltage MODE Input Current SHDN Input High Voltage SHDN Input ...

Page 4

LTC3539/LTC3539-2 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current and OUT 100 90 80 EFFICIENCY POWER LOSS 2. 3. ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS DS(ON) OUT 0.30 0.25 0.20 PMOS 0.15 0.10 NMOS 0.05 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V (V) OUT 3539 G09 Start-Up Voltage vs Temperature 0.80 0.75 1mA LOAD 0.70 0.65 ...

Page 6

LTC3539/LTC3539-2 PIN FUNCTIONS SW (Pin 1): Switch Pin. Connect inductor between SW and V . Keep PCB trace lengths as short and wide as pos- IN sible to reduce EMI. If the inductor current falls to zero, or SHDN is ...

Page 7

OPERATION DETAILED DESCRIPTION The LTC3539 is a high power synchronous boost converter in an 8-lead 2mm × 3mm DFN package. With the ability to start up and operate from inputs of 700mV, the device features fi xed frequency, current mode ...

Page 8

LTC3539/LTC3539-2 OPERATION Zero Current Comparator: The zero current comparator monitors the inductor current to the output and shuts off the synchronous rectifi er once this current reduces to ap- proximately 40mA. This prevents the inductor current from reversing in polarity, ...

Page 9

APPLICATIONS INFORMATION V > V Operation IN OUT The LTC3539 will maintain output voltage regulation even when the input voltage is above the desired output. Note that the effi ciency and the maximum output current capability are reduced. Refer to ...

Page 10

LTC3539/LTC3539-2 APPLICATIONS INFORMATION Table 1. Representative Inductors VENDOR PART/STYLE Coilcraft MSS5131 (847) 639-6400 LPS4018-222 www.coilcraft.com MSS6132 MOS6020 Murata LQH55D www.murata.com LQH66S Sumida CDRH4D22 (847) 956-0666 CDRH4D28C www.sumida.com CDRH5D28 CDR6D23 TDK VLF5014ST (847) 803-6100 www.component.tdk.com Toko D53LC (408) 432-8282 D63LCB www.tokoam.com ...

Page 11

... NOTE 6) 0.200 REF 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. DCB Package 8-Lead Plastic DFN (2mm × ...

Page 12

... Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous LTC3527-1 Step-Up DC/DC Converter with Output Disconnect LTC3528/ 1A, 1MHz Synchronous Step-Up DC/DC Converter with LTC3528B Output Disconnect ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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