LTC3203
LTC3203-1
LTC3203B
LTC3203B-1

PRODUCTION

500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps

Data Sheet Product Selection Table
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Overview

  • Selectable Dual Mode Operation: 1:1.5 or 1:2
  • High Output Current: Up to 500mA
  • Low Noise Constant Frequency (1MHz/0.9MHz) Operation
  • VIN Range: 2.7V to 5.5V
  • Adjustable Output Voltage (LTC3203/LTC3203B)
  • User Selectable Fixed Output Voltages: 4.5V or 5V (LTC3203-1 and LTC3203B-1)
  • Automatic Burst Mode® Operation with IQ ~ 120µA (LTC3203/LTC3203-1)
  • Constant Freqency Operation at All Loads (LTC3203B/LTC3203B-1)
  • Soft-Start Limits Inrush Current at Turn-On
  • Short-Circuit/Thermal Protection
  • Shutdown Disconnects Load from Input
  • Shutdown Current: < 1µA
  • Available in a 10-pin (3mm × 3mm) DFN Package

The LTC3203/LTC3203-1/LTC3203B/LTC3203B-1 are low noise, high efficiency charge pump DC/DC converters capable of driving loads up to 500mA from a 2.7V to 5.5V input. Low external parts count (two flying capacitors and bypass capacitors at VIN and VOUT) make the LTC3203 family ideally suited for small, battery-powered applications.

Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. The LTC3203/LTC3203-1 feature Burst Mode operation at light load to achieve high efficiency whereas the LTC3203B/LTC3203B-1 operate at constant frequency to achieve lowest noise operation.

The LTC3203-1/LTC3203B-1 have a user selectable fixed output voltage of 4.5V or 5V to power LEDs or logic circuits. The FB pin of the LTC3203/LTC3203B can be used to program the desired output voltage. The parts are short-circuit and over temperature protected and are available in a low profile (3mm × 3mm) DFN package.

Applications

  • High Current LED Backlight Supply for Cellphones/PDAs
  • Cellphone Camera Light Supply
  • General Purpose 3.3V or Li-Ion to 5V Supply
  • USB ON THE GO(OTG) Devices
LTC3203
LTC3203-1
LTC3203B
LTC3203B-1
500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps
Efficiency vs VIN at 300mA Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3203
  • LTC3203-1
  • LTC3203B
  • LTC3203B-1
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC863A-C

LTC3203B-1 Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 4.5V or 5V @ Up to 500mA

Buy Now View Details

Product Details

Demonstration circuit 863 is a high efficiency regulated boost charge pump converter that exercises the 500mA low noise LTC3203 in the 3mm x 3mm DFN package. It comes with three assembly versions, DC863A-A (3.3V output), DC863A-B (4.5V or 5V output) and DC863A-C (4.5V or 5V output), featuring the LTC3203B, LTC3203-1, and LTC3203B-1 respectively. The input voltage range is from 2.7V to 5.5V. The output current can reach up to 500mA with an input voltage above 2.9V for a 4.5V output, above 3.1V for a 5V output and over the full input range for a 3.3V output. By choosing the proper operation modes, the DC863A circuit optimizes conversion efficiencies and maintains the maximum output current at each output voltage.


Additionally, DC863A-B features Automatic Burst Mode operation at light load to achieve low supply current, whereas DC863A-A and DC863A-C operate in constant frequency mode to achieve low noise at the input. The built-in soft-start prevents excessive inrush current at start-up, and short-circuit current limit/thermal protection help the part survive a continuous short-circuit.

eval board
schematic 2
DC863A-B

LTC3203-1 Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 4.5V or 5V @ Up to 500mA

Buy Now View Details

Product Details

Demonstration circuit 863 is a high efficiency regulated boost charge pump converter that exercises the 500mA low noise LTC3203 in the 3mm x 3mm DFN package. It comes with three assembly versions, DC863A-A (3.3V output), DC863A-B (4.5V or 5V output) and DC863A-C (4.5V or 5V output), featuring the LTC3203B, LTC3203-1, and LTC3203B-1 respectively. The input voltage range is from 2.7V to 5.5V. The output current can reach up to 500mA with an input voltage above 2.9V for a 4.5V output, above 3.1V for a 5V output and over the full input range for a 3.3V output. By choosing the proper operation modes, the DC863A circuit optimizes conversion efficiencies and maintains the maximum output current at each output voltage.


Additionally, DC863A-B features Automatic Burst Mode operation at light load to achieve low supply current, whereas DC863A-A and DC863A-C operate in constant frequency mode to achieve low noise at the input. The built-in soft-start prevents excessive inrush current at start-up, and short-circuit current limit/thermal protection help the part survive a continuous short-circuit.

eval board
schematic 3
DC863A-A

LTC3203B Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 4V, VOUT = 3.3V @ Up to 500mA

Buy Now View Details

Product Details

Demonstration circuit 863 is a high efficiency regulated boost charge pump converter that exercises the 500mA low noise LTC3203 in the 3mm x 3mm DFN package. It comes with three assembly versions, DC863A-A (3.3V output), DC863A-B (4.5V or 5V output) and DC863A-C (4.5V or 5V output), featuring the LTC3203B, LTC3203-1, and LTC3203B-1 respectively. The input voltage range is from 2.7V to 5.5V. The output current can reach up to 500mA with an input voltage above 2.9V for a 4.5V output, above 3.1V for a 5V output and over the full input range for a 3.3V output. By choosing the proper operation modes, the DC863A circuit optimizes conversion efficiencies and maintains the maximum output current at each output voltage.


Additionally, DC863A-B features Automatic Burst Mode operation at light load to achieve low supply current, whereas DC863A-A and DC863A-C operate in constant frequency mode to achieve low noise at the input. The built-in soft-start prevents excessive inrush current at start-up, and short-circuit current limit/thermal protection help the part survive a continuous short-circuit.
DC863A-C
LTC3203B-1 Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 4.5V or 5V @ Up to 500mA
DC863A-A - Schematic
DC863A-B
LTC3203-1 Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 4.5V or 5V @ Up to 500mA
DC863A-A - Schematic
DC863A-A
LTC3203B Demo Board | Regulated Boost Charge Pump, 2.7V ≤ VIN ≤ 4V, VOUT = 3.3V @ Up to 500mA
DC863A-A - Schematic

Reference Designs

DK-DEV-3CLS200N Dev Kit
DK-DEV-3CLS200N Dev Kit
LTC Parts List
DK-DEV-3CLS200N Block Diagram
Cyclone III LS FPGA Development Kit
Altera Cyclone III LS FPGA Development Kit Circuits from the lab

View Detailed Reference Design

Features and Benefits

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Altera Cyclone III LS FPGA Development Kit
DK-DEV-3CLS200N Dev Kit
LTC Parts List
DK-DEV-3CLS200N Block Diagram
Cyclone III LS FPGA Development Kit

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