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参数资料
型号： LTC3112IDHD#TRPBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： 12 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO16
封装： 5 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WJGD-2, DFN-16
文件页数： 1/32页
文件大小： 651K
代理商： LTC3112IDHD#TRPBF
LTC3112
1
3112f
TYPICAL APPLICATION
DESCRIPTION
15V, 2.5A Synchronous
Buck-Boost DC/DC
Converter
The LTC3112 is a xed frequency synchronous buck-boost
DC/DC converterwith 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 range of 2.7V to 15V, the LTC3112 is well-
suited for a wide variety of single or multiple cell battery,
backup capacitor or wall adapter source applications. Low
RDS(ON) internal N-Channel MOSFET switches provide
highly efcient operation in applications with higher load
current requirements.
The LTC3112 features selectable PWM or Burst Mode
operation, an easily synchronized oscillator and output
disconnect in shutdown. An output current monitor circuit
allows the load current to be controlled or measured.
Other features include <1μA shutdown current, short
circuit protection, soft-start, current limit and thermal
shutdown.
The LTC3112 is offered in both a 16-pin (4mm
× 5mm ×
0.75mm) DFN and 20-pin TSSOP packages.
Efciency at 5VOUT
FEATURES
APPLICATIONS
n Regulated Output with VIN Above, Below or Equal to VOUT
n 2.7V to 15V Input Voltage Range
n 2.5V to 14V Output Voltage Range
n 2.5A Continuous Output Current: VIN ≥ 5V,
VOUT = 5V, PWM Mode
n Output Current Monitor
n Up to 95% Efciency
n 750kHz Switching Frequency, Synchronizable
Between 300kHz and 1.5MHz
n Internal N-Channel MOSFETs
n Selectable Burst Mode Operation, IQ = 50μA
n Shutdown Current < 1μA
n Overvoltage Protection
n Output Disconnect in Shutdown
n Internal Soft-Start
n Small, Thermally Enhanced 16-Lead (4mm
× 5mm ×
0.75mm) DFN or 20-Lead TSSOP Package
n 3.3V or 5V from 1, 2 or 3 Li-Ion, Backup Capacitor Stack
n Hand Held Inventory Terminals
n RF Transmitters
n 12V Synchronous Boost Converter
n Multiple Power Input Systems
n LED Lighting with Current Regulation
n 12V Lead Acid Battery to 12V
L, LT, LTC, LTM, Linear Technology Burst Mode, LTSpice and the Linear logo 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 5481178.
VIN
4.7μH
0.1μF
680pF
22pF
33k
845k
158k
47pF
47μF
1μF
10μF
10k
42.2k
100pF
TO ADC
1V PER AMP
5V/2.5A, VIN > 5V
ON
OFF
PWM
BURST
2.7V TO 15V
SW1
BST1
VIN
VCC
RUN
GND
PWM/SYNC
SW2
BST2
VOUT
COMP
IOUT
OVP
FB
LTC3112
VOUT
3112 TA01
LOAD CURRENT (A)
0.0001
EFFICIENCY
(%)
100
70
80
50
60
90
30
40
0.01
1
0.1
3112 TA02
0.001
2.7VIN
5.0VIN
12VIN
PWM
BURST
5V, 750kHz Wide Input Voltage Buck-Boost Regulator
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相关代理商/技术参数
参数描述
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