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LTC3100EUD-TRPBF Datasheet(PDF) 1 Page - Linear Technology

Part # LTC3100EUD-TRPBF
Description  1.5MHz Synchronous Dual Channel DC/DC Converter and 100mA LDO
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3100EUD-TRPBF Datasheet(HTML) 1 Page - Linear Technology

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LTC3100
1
3100fa
SWBST
VINBK
VBST
LTC3100
FBBST
3.3μH
1.87M
1.07M
3.3V AT 100mA
10μF
2
2.2μF
VLDO
VINBST
FBLDO
SWBK
PGBK
PGBST
102k
25.5k
BOOST
LDO
BUCK
VBATT
1.6V TO 3.2V
2.2μF
FBBK
2M
1M
10μF
3100 TA01a
MODE
RUNBST
RUNLDO
RUNBK
GND
FF EN_BURST
OFF ON
OFF ON
OFF ON
4.7μH
VBOOST
3V AT 50mA
VLDO
1.8V AT 200mA
VBUCK
BOOST_GOOD
BUCK_GOOD
1M
1M
The LTC®3100 combines a high efficiency 700mA syn-
chronous step-up converter, a 250mA synchronous
step-down converter and a 100mA LDO regulator. The
LTC3100 features a wide input voltage range of 0.65V to
5V. The step-down converter can be powered by the output
of the step-up converter or from a separate power source
between 1.8V and 5.5V. The LDO can also be used as a
sequencing switch on the output of the boost.
A switching frequency of 1.5MHz minimizes solution foot-
print by allowing the use of tiny, low profile inductors and
ceramic capacitors. The switching regulators use current
mode control and are internally compensated, reducing
external parts count. Each converter automatically transi-
tions to Burst Mode operation to maintain high efficiency
over the full load range. Burst Mode operation can be
disabled for low noise applications. The integrated LDO
provides a third low noise, low dropout supply.
Anti-ringing circuitry reduces EMI by damping the boost
inductor in discontinuous mode. Additional features
include shutdown current of under 1μA and overtem-
perature shutdown. The LTC3100 is housed in a 16-lead
3mm
× 3mm 0.75mm QFN package.
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
1.5MHz Synchronous Dual
Channel DC/DC Converter
and 100mA LDO
Two-Cell, Triple Output Converter
n Extremely Compact Triple-Rail Solution
n Burst Mode® Operation, IQ = 15μA
n 1.5MHz Fixed Frequency Operation
n Power Good Indicators
n 700mA Synchronous Step-Up DC/DC
0.65V to 5V VIN Range
1.5V to 5.25V VOUT Range
94% Peak Efficiency
VIN > VOUT Operation
Output Disconnect
n 250mA Synchronous Step-Down DC/DC
1.8V to 5.5V VIN Range
0.6V to 5.5V VOUT Range
n LDO (VIN Internally Tied to VBST)
0.6V to 5.25V VOUT Range
200mV Dropout Voltage at 100mA
n Available in a 16-Lead 3mm
× 3mm QFN Package
n Bar Code Readers
n Medical Instruments
n Low Power Portable Electronic Devices
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Efficiency and Power Loss
vs Load Current, VIN = 2.4V
LOAD CURRENT (mA)
30
50
80
0.01
10
100
1000
0
10
0.1
1
100
70
90
40
60
20
100
0.01
1000
1
10
0.1
3100 TA01b
BOOST
BUCK
PL, BOOST
PL, BUCK


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