LTC3113: 3A Low Noise Buck-Boost DC/DC Converter Data Sheet11/23/2010388K
Features and Benefits
- Regulated Output with Input Voltage Above, Below or Equal to the Output Voltage
- 1.8V to 5.5V Input and Output Voltage Range
- 3A Continuous Output Current VIN > 3.0V, VOUT = 3.8V
- 1.5A Continuous Output Current for VIN ≥ 1.8V, VOUT = 3.3V
- Single Inductor
- Low Noise Buck-Boost Architecture
- Up to 96% Efficiency
- Programmable Frequency from 300kHz to 2MHz
- Selectable Burst Mode® Operation
- Output Disconnect in Shutdown
- Shutdown Current: <1μA
- Internal Soft-Start
- Small, Thermally Enhanced 16-Lead (4mm × 5mm × 0.75mm) DFN Package and 20-Lead TSSOP Package
The LTC3113 is a wide VIN range, highly efficient, fixed 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 low noise operation, making it well suited for RF and precision measurement applications.
The LTC3113 can deliver up to 3A of continuous output current to satisfy the most demanding applications. Higher output current is possible in stepdown (buck) mode. Integrated low RDS(ON) power MOSFETs and a programmable switching frequency up to 2MHz result in a compact solution footprint. Selectable Burst Mode operation improves efficiency at light loads.
Other features include <1μA shutdown current, integrated soft-start, short-circuit protection, current limit and thermal overload protection. The LTC3113 is housed in the thermally enhanced 16-lead (4mm × 5mm × 0.75mm) DFN and 20-lead TSSOP packages.
- Wireless Modems
- Backup Power Systems
- Portable Inventory Terminals
- Portable Barcode Readers
- Portable Instrumentation
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration Circuit 1551A is a wide Vin range, highly efficient, fixed frequency buck-boost converter. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below, or equal to the output voltage. The LTC3113 features selectable PWM or Burst Mode operation and an oscillator with a programmable frequency from 300kHz to 2MHz. The LTC3113 can deliver up to 3A of continuous output current to satisfy most demanding applications. Higher output currents are possible in step-down (buck) mode. The LTC3113 operates with a 1.8V to 5.5V input and output voltage range. The demonstration board has been designed to operate over the full input voltage range, with VOUT set to 3.3V and IOUT of 3.0A. For VIN < 3V, IOUT capability is reduced.
Documentation & Resources
R457 Reliability Data3/26/201865 K
DC1551A - Demo Manual1/24/2011771K
Tools & Simulations
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Models for the following parts are available in LTspice:
LTC3113 Companion Parts
Recommended Related Parts
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