OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC3530EMS#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3530
1
3530fb
Wide Input Voltage
Synchronous Buck-Boost
DC/DC Converter
The LTC
®
3530 is a wide V
IN
range, highly effi cient, fi xed
frequency, buck-boost DC/DC converter that operates
from input voltages above, below or equal to the output
voltage. The topology incorporated in the IC provides a
continuous transfer function through all operating modes,
making the product ideal for single lithium-ion, two-cell
alkaline or NiMH applications where the output voltage is
within the battery voltage range.
The LTC3530 is pin compatible with the LTC3440 buck-
boost DC/DC converter but adds programmable automatic
Burst Mode operation and extends the V
IN
/V
OUT
range to
1.8V. Switching frequencies up to 2MHz are programmed
with an external resistor. Automatic Burst Mode operation
allows the user to program the load current threshold for
Burst Mode operation using a single resistor from the
BURST pin to GND.
Other features include 1μA shutdown, short circuit pro-
tection, programmable soft-start control, current limit
and thermal shutdown. The LTC3530 is available in a
thermally enhanced 10-lead (3mm × 3mm) DFN or MSOP
package.
n
MP3 Players
n
Handheld Instruments
n
Digital Cameras
n
Smart Phones
n
Portable GPS Units
n
Miniature Hard Disk Drive Power
n
Regulated Output with Input Voltages Above, Below
or Equal to the Output
n
1.8V to 5.5V Input and 1.8V to 5.25V Output Range
n
250mA Continuous Output Current from 1.8V V
IN
n
600mA Continuous/1A Peak Output Current from
Li-Ion
n
Single Inductor
n
Synchronous Rectifi cation: Up to 96% Effi ciency
n
Programmable Automatic Burst Mode
®
Operation
n
Output Disconnect in Shutdown
n
Pin Compatible with the LTC3440
n
Programmable Frequency from 300kHz to 2MHz
n
<1μA Shutdown Current
n
Small Thermally Enhanced 10-Lead (3mm × 3mm)
DFN and 10-Lead MS Packages
Effi ciency
SW1
V
IN
SHDN/SS
R
T
SW2
V
OUT
FB
V
C
BURST
LTC3530
10μF
1.8V TO 5.5V
1M
22μF
V
OUT
3.3V AT
250mA
576k
0.01μF
10k
560pF
3530 TA01a
4.7μH
33.2k
100k
GND
ONOFF
33pF
15k
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 100
0
3350 TA01b
0
1
V
IN
= 2.0V
V
IN
= 4.2V
V
IN
= 3.6V
Burst Mode V
IN
= 3.6V
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patents Pending.
LTC3530
2
3530fb
TOP VIEW
DD PACKAGE
10-LEAD
(
3mm s 3mm
)
PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
V
C
FB
SHDN/SS
V
IN
V
OUT
R
T
BURST
SW1
SW2
GND
11
T
JMAX
= 125°C, θ
JA
= 43°C/W, θ
JC
= 4.3°C/W
EXPOSED PAD IS GND (PIN 11) MUST BE SOLDERED TO PCB
1
2
3
4
5
R
T
BURST
SW1
SW2
GND
10
9
8
7
6
V
C
FB
SHDN/SS
V
IN
V
OUT
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 120°C/W, θ
JC
= 45°C/W
V
IN
, V
OUT
Voltage ......................................... –0.3V to 6V
SW1, SW2 Voltage
DC ............................................................ –0.3V to 6V
Pulsed < 100ns ........................................ –0.3V to 7V
(Note 1)
The
l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= V
OUT
= 3.6V, R
T
= 33.2k, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Operating Range
l
1.8 5.5 V
Output Voltage Adjust Range
l
1.8 5.25 V
Feedback Voltage
l
1.191 1.215 1.239 V
Feedback Input Current V
FB
= 1.215V 1 50 nA
Quiescent Current, Burst Mode Operation V
FB
= 1.215V, BURST = 0V (Note 3) 40 60 μA
Quiescent Current, Shutdown SHDN = 0V, Not Including Switch Leakage 0.1 1 μA
Quiescent Current, Active V
C
= 0V, BURST = 3V (Note 3) 700 1200 μA
Input Current Limit
l
12 A
V
C
, R
T
, FB, SHDN/SS, BURST Voltage .......... –0.3V to 6V
Operating Temperature (Note 2)............... –40°C to 85°C
Maximum Junction Temperature (Note 4)............. 125°C
Storage Temperature Range ................... –65°C to 150°C
ORDER INFORMATION
PIN CONFIGURATION
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3530EDD#PBF LTC3530EDD#TRPBF LCBH 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LTC3530EMS#PBF LTC3530EMS#TRPBF LTCBJ 10-Lead Plastic MSOP –40°C to 85°C
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: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
LTC3530
3
3530fb
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 LTC3530E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlations
with statistical process controls.
Note 3: Current measurements are performed when the outputs are not
switching.
Note 4: 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.
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= V
OUT
= 3.6V, R
T
= 33.2k, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
NMOS Switch Leakage Switches B and C 0.1 5 μA
PMOS Switch Leakage Switches A and D 0.1 10 μA
NMOS Switch On Resistance Switches B and C 0.21
Ω
PMOS Switch On Resistance Switches A and D 0.24
Ω
Maximum Duty Cycle Boost (% Switch C On)
Buck (% Switch A On)
l
l
80
100
90 %
%
Minimum Duty Cycle
l
0%
Frequency
l
0.7 1 1.3 MHz
Error Amp AVOL 90 dB
Error Amp Source Current 300 μA
Error Amp Sink Current 300 μA
Burst Threshold 1V
Burst Input Current V
BURST
= 5.5V 2 μA
SHDN/SS Threshold When IC is Enabled
When EA is at Maximum Boost Duty Cycle
l
0.4 0.85
1.6
1.4 V
V
SHDN/SS Input Current V
SHDN
= 5.5V 0.01 1 μA
V
IN
(V)
2.5
V
IN
QUIESCENT CURRENT (mA)
4.0
5.0
3530 G01
3.0 3.5 4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5.5
2.0 MHz
1.5 MHz
1.0 MHz
0.5 MHz
NO SWITCHING
V
IN
(V)
2.5
V
IN
QUIESCENT CURRENT (μA)
3.0
3.5
4.0 4.5
3530 G02
5.0
50
45
40
35
30
25
20
15
10
5
0
5.5
V
IN
(V)
2.5
2.0
2.5
3.0
4.0 5.0
3530 G03
1.5
1.0
3.0 3.5
4.5 5.5
0.5
0.0
INPUT CURRENT (A)
3.5
Quiescent Current vs V
IN
(Fixed Frequency Mode) Burst Mode Quiescent Current
T
A
= 25°C, unless otherwise specifi ed.
Peak Current Clamp vs V
IN
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3530EMS#PBF

Mfr. #:
Buy LTC3530EMS#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1.8V to 5.5Vin, 600mA, 2MHz Buck-Boost Converter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet