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Linear Technology Electronic Components Datasheet

LTC3111MPDE Datasheet

1.5A Synchronous Buck-Boost DC/DC Converter

No Preview Available !

FEATURES
n Regulated Output with VIN Above, Below
or Equal to VOUT
n 2.5V to 15V Input and Output Voltage Range
n 1.5A Continuous Output Current: VIN ≥ 5V,
VOUT = 5V, PWM Mode
n Single Inductor
n Accurate RUN Threshold
n Up to 95% Efficiency
n 800kHz Switching Frequency, Synchronizable
Between 600kHz and 1.5MHz
n 49µA No-Load Quiescent Current in Burst Mode®
Operation
n Output Disconnect in Shutdown
n Shutdown Current < 1µA
n Internal Soft-Start
n Small, Thermally Enhanced 14-Lead (3mm × 4mm ×
0.75mm) DFN and 16-Lead MSOP Packages
APPLICATIONS
n 3.3V or 5V from 1, 2 or 3 Li-Ion, Multiple-Cell
Alkaline/NiMH Batteries
n RF Transmitters
n Military, Industrial Power Systems
LTC3111
15V, 1.5A Synchronous
Buck-Boost DC/DC
Converter
DESCRIPTION
The LTC®3111 is a fixed frequency, synchronous buck-
boost DC/DC converter with an extended input and output
range. The unique 4-switch, single inductor architecture
provides low noise and seamless operation from input
voltages above, below or equal to the output voltage.
With an input and output range of 2.5V to 15V, the LTC3111
is well suited for a wide variety of single or multiple-cell
batteries, back-up capacitor or wall adapter source applica-
tions. Low RDS(ON) internal N-channel MOSFET switches
and selectable PWM or Burst Mode operation produce
high efficiency over a wide range of operating conditions.
An accurate RUN pin allows the user to program the
turn-on threshold voltage of the converter. Other features
include: short-circuit protection, internal soft-start and
thermal shutdown.
The LTC3111 is offered in both thermally enhanced
14-lead (3mm × 4mm × 0.75mm) DFN and 16-lead MSOP
packages.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, LTspice are registered
trademarks and No RSENSE and PowerPath are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6404251, 6166527, 5481178, 6304066, 6580258.
TYPICAL APPLICATION
5V, 800kHz Wide Input Voltage Buck-Boost Regulator
4.7µH
0.1µF
VIN
2.5V TO 15V
10µF
SW1
BST1
VIN
SW2
BST2
VOUT
LTC3111
COMP
BURST PWM
PWM/SYNC
OFF ON
RUN
FB
SNSGND
SGND
VCC
PGND
0.1µF
680pF
26.1k
27pF
1µF
20k
1M
VOUT
5V
1.5A
22µF (VIN > 5V)
33pF
191k
3111 TA01a
For more information www.linear.com/LTC3111
Efficiency at 5VOUT
100
PWM
90
BURST
80
70
60
50
40
30
0.0001
VIN = 2.7V
VIN = 5V
VIN = 12V
0.001 0.01 0.1
LOAD CURRENT (A)
1
10
3111 TA01b
3111fa
1


Linear Technology Electronic Components Datasheet

LTC3111MPDE Datasheet

1.5A Synchronous Buck-Boost DC/DC Converter

No Preview Available !

LTC3111
ABSOLUTE MAXIMUM RATINGS (Notes 1, 3)
VIN Voltage.................................................. –0.3V to 16V
VOUT Voltage............................................... –0.3V to 16V
SW1 Voltage (Note 4).................... –0.3V to (VIN + 0.3V)
SW2 Voltage (Note 4)..................–0.3V to (VOUT + 0.3V)
BST1 Voltage.................... (VSW1 – 0.3V) to (VSW1 + 6V)
BST2 Voltage....................(VSW2 – 0.3V) to (VSW2 + 6V)
RUN Voltage............................................... –0.3V to 16V
PWM/SYNC, VCC Voltage.............................. –0.3V to 6V
FB, COMP, Voltage........................................ –0.3V to 6V
Operating Junction Temperature Range (Notes 2, 5)
LTC3111E, LTC3111I............................ –40°C to 125°C
LTC3111H............................................ –40°C to 150°C
LTC3111MP......................................... –55°C to 150°C
Maximum Junction Temperature (Note 3)............. 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10sec)
MSOP................................................................ 300°C
PIN CONFIGURATION
TOP VIEW
COMP 1
FB 2
SNSGND 3
RUN 4
VIN 5
SW1 6
BST1 7
15
PGND
14 SGND
13 PWM/SYNC
12 VCC
11 NC
10 VOUT
9 SW2
8 BST2
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W, θJC = 5°C/W
EXPOSED PAD (PIN 15) IS PGND, MUST BE SOLDERED TO PCB
TOP VIEW
COMP 1
FB 2
SNSGND 3
RUN 4
VIN 5
SW1 6
BST1 7
PGND 8
17
PGND
16 SGND
15 PWM/SYNC
14 VCC
13 NC
12 VOUT
11 SW2
10 BST2
9 PGND
MSE PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 40°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3111EDE#PBF
LTC3111EDE#TRPBF
3111
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3111IDE#PBF
LTC3111IDE#TRPBF
3111
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3111HDE#PBF
LTC3111HDE#TRPBF 3111
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 150°C
LTC3111MPDE#PBF
LTC3111MPDE#TRPBF 3111
14-Lead (4mm × 3mm) Plastic DFN
–55°C to 150°C
LTC3111EMSE#PBF
LTC3111EMSE#TRPBF 3111
16-Lead Plastic MSOP
–40°C to 125°C
LTC3111IMSE#PBF
LTC3111IMSE#TRPBF 3111
16-Lead Plastic MSOP
–40°C to 125°C
LTC3111HMSE#PBF
LTC3111HMSE#TRPBF 3111
16-Lead Plastic MSOP
–40°C to 150°C
LTC3111MPMSE#PBF
LTC3111MPMSE#TRPBF 3111
16-Lead Plastic MSOP
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard 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/
3111fa
2
For more information www.linear.com/LTC3111


Part Number LTC3111MPDE
Description 1.5A Synchronous Buck-Boost DC/DC Converter
Maker Linear
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