900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3528BEDDB-2 Datasheet

2MHz Synchronous Step-Up DC/DC Converter

No Preview Available !

FEATURES
n Delivers 3.3V at 200mA from a Single Alkaline/
NiMH Cell or 3.3V at 400mA from Two Cells
n VIN Start-Up Voltage: 700mV
n 0.50V to 5.5V Input Range
n 1.6V to 5.25V VOUT Range
n Up to 94% Efficiency
n Output Disconnect
n 2MHz Fixed Frequency Operation
n VIN > VOUT Operation
n Integrated Soft-Start
n Current Mode Control with Internal Compensation
n Low Noise PWM Operation
n Internal Synchronous Rectifier
n Logic Controlled Shutdown: <1µA
n Anti-Ringing Control
n Low Profile (2mm × 3mm × 0.75mm) DFN Package
APPLICATIONS
n Medical Instruments
n Flash-Based MP3 Players
n Noise Canceling Headphones
n Wireless Mice
n Bluetooth Headsets
LTC3528B-2
1A, 2MHz Synchronous
Step-Up DC/DC Converter
in 2mm × 3mm DFN
DESCRIPTION
The LTC®3528B-2 is a synchronous, fixed frequency
step-up DC/DC converter with output disconnect. High
efficiency synchronous rectification, in addition to a 700mV
start-up voltage and operation down to 500mV once
started, provides longer run-time for single or multiple
cell battery-powered products.
A switching frequency of 2MHz minimizes solution
footprint by allowing the use of tiny, low profile induc-
tors and ceramic capacitors. The current mode PWM is
internally compensated, simplifying the design process.
The LTC3528B-2 features continuous switching at light
loads. Anti-ringing circuitry reduces EMI by damping the
inductor in discontinuous mode. Additional features include
a low shutdown current, open-drain power good output,
short-circuit protection and thermal overload protection.
The LTC3528B-2 is offered in an 8-lead 2mm × 3mm ×
0.75mm DFN package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
TYPICAL APPLICATION
2.2µH
VIN
1.8V TO 3.2V
4.7µF
OFF ON
SW
VIN
VOUT
LTC3528B-2
PGOOD FB
SHDN
GND
499k
287k
68pF
VOUT
3.3V
400mA
10µF
35282 TA01a
Efficiency and Power Loss
100
VOUT = 3.3V
90 VIN = 2.4V
80
1000
70
EFFICIENCY
100
60
50
POWER LOSS
40
30
10
20
10
0
1
0.1
1
10
100
1000
LOAD CURRENT (mA)
35282 TA01b
3528b2fa
1


Linear Technology Electronic Components Datasheet

LTC3528BEDDB-2 Datasheet

2MHz Synchronous Step-Up DC/DC Converter

No Preview Available !

LTC3528B-2
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN 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
VOUT.............................................................. –0.3V to 6V
PGOOD.......................................................... –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 5)............................................. –40°C to 125°C
Junction Temperature............................................ 125°C
Storage Temperature Range.................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
SHDN 1
8 VIN
FB 2
7 SGND
9
PGOOD 3
6 PGND
VOUT 4
5 SW
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 76°C/W (NOTE 6)
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3528BEDDB-2#PBF LTC3528BEDDB-2#TRPBF LDPB
8-Lead (3mm × 2mm) Plastic DFN
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
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 1.2V, VOUT = 3.3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Start-Up Voltage
Output Voltage Adjust Range
Feedback Voltage
ILOAD = 1mA
TA = 0°C to 85°C
(Note 7)
l
0.70 0.88
V
l 1.7
1.6
5.25
V
5.25
V
l 1.170 1.200 1.230
V
Feedback Input Current
Quiescent Current—Shutdown
Quiescent Current—Active
N-Channel MOSFET Switch Leakage Current
P-Channel MOSFET Switch Leakage Current
N-Channel MOSFET Switch On Resistance
VFB = 1.3V
VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V
Measured on VOUT, Nonswitching (Note 4)
VSW = 5V
VSW = 5V, VOUT = 0V
1
50
nA
0.01
1
µA
300
500
µA
0.1
10
µA
0.1
10
µA
0.175
Ω
P-Channel MOSFET Switch On Resistance
0.250
Ω
N-Channel MOSFET Current Limit
l 1.0
1.5
A
Current Limit Delay Time to Output
(Note 3)
60
ns
Maximum Duty Cycle
Minimum Duty Cycle
Frequency
VFB = 1.15V
VFB = 1.3V
l 87
92
%
l
0
%
l 1.8
2.0
2.4
MHz
3528b2fa
2


Part Number LTC3528BEDDB-2
Description 2MHz Synchronous Step-Up DC/DC Converter
Maker Linear
PDF Download

LTC3528BEDDB-2 Datasheet PDF






Similar Datasheet

1 LTC3528BEDDB-2 2MHz Synchronous Step-Up DC/DC Converter
Linear





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy