LTC3204 - Low Noise Regulated Charge Pump in 2 × 2 DFN


  • Fixed 3.3V or 5V Outputs
  • VIN Range:
    1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3)
    2.7V to 5.5V (LTC3204-5/LTC3204B-5)
  • Output Current:
    Up to 150mA (LTC3204-5/LTC3204B-5)
    Up to 50mA (LTC3204-3.3/LTC3204B-3.3)
  • Automatic Burst Mode® Operation with IQ = 48µA (LTC3204-3.3/LTC3204-5)
  • Constant Frequency Operation at All Loads (LTC3204B-3.3/LTC3204B-5)
  • Low Noise Constant Frequency (1.2MHz) Operation*
  • Built-In Soft-Start Reduces Inrush Current
  • Shutdown Disconnects Load from Input
  • Shutdown Current <1µA
  • Short-Circuit/Thermal Protection
  • Available in Low Profile 6-Lead DFN Package

Typical Application

LTC3204 Typical Application
LTC3204 Typical Application


The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are low noise, constant frequency (1.2MHz) switched capacitor voltage doublers. The LTC3204-3.3/ LTC3204B-3.3 can produce a regulated output voltage of 3.3V from a minimum input voltage of 1.8V (2 alkaline cells) whereas the LTC3204-5/LTC3204B-5 can produce 5V from a minimum of 2.7V (Li-Ion battery) input.

LTC3204-3.3/LTC3204-5 feature automatic Burst Mode® operation at light loads to maintain low supply current whereas LTC3204B-3.3/LTC3204B-5 feature constant frequency operation at any load. Built-in soft-start circuitry prevents excessive inrush current during start-up. Thermal shutdown and current-limit circuitry allow the parts to survive a continuous short-circuit from VOUT to GND.

High switching frequency minimizes overall solution footprint by allowing the use of tiny ceramic capaci-tors. In shutdown, the load is disconnected from the input and the quiescent current is reduced to <1µA.

The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are available in a low profile (0.75mm) 6-lead 2mm × 2mm DFN package.

*Protected by U.S. Patents including 6411531.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3204BEDC-3.3#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204BEDC-3.3#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204BEDC-3.3#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204BEDC-5#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204BEDC-5#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204BEDC-5#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-3.3#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-3.3#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-3.3#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-5#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-5#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LTC3204EDC-5#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes

LTC3204 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3204BEDC-3.3#PBF 2x2 DFN-6 E $1.91 Yes
LTC3204BEDC-3.3#TRMPBF 2x2 DFN-6 E $1.91 $1.62 Yes
LTC3204BEDC-3.3#TRPBF 2x2 DFN-6 E $1.91 $1.60 Yes
LTC3204BEDC-5#PBF 2x2 DFN-6 E $1.91 Yes
LTC3204BEDC-5#TRMPBF 2x2 DFN-6 E $1.91 $1.62 Yes
LTC3204BEDC-5#TRPBF 2x2 DFN-6 E $1.91 $1.60 Yes
LTC3204EDC-3.3#PBF 2x2 DFN-6 E $1.91 Yes
LTC3204EDC-3.3#TRMPBF 2x2 DFN-6 E $1.91 $1.62 Yes
LTC3204EDC-3.3#TRPBF 2x2 DFN-6 E $1.91 $1.60 Yes
LTC3204EDC-5#PBF 2x2 DFN-6 E $1.91 Yes
LTC3204EDC-5#TRMPBF 2x2 DFN-6 E $1.91 $1.62 Yes
LTC3204EDC-5#TRPBF 2x2 DFN-6 E $1.91 $1.60 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC761A-A LTC3204EDC-5 Demo Board | Low Noise Regulated Charge Pump in 2x2 DFN, Burst Mode, Vin = 2.7V-5.5V, Vout = 5V/(65-150mA) $75.00
DC761A-B LTC3204EDC-3.3 Demo Board | Low Noise Regulated Charge Pump in 2x2 DFN, Burst Mode, Vin = 1.8V-4.5V, Vout = 3.3V/(40-50mA max) $75.00
DC916A-A LTC3204BEDC-5 Demo Board | Low Noise Regulated Charge Pump 2x2 DFN, Vin = 2.7V-5.5V, Vout = 5V/(65-150mA max) $75.00
DC916A-B LTC3204BEDC-3.3 Demo Board | Low Noise Regulated Charge Pump in 2x2 DFN, Vin = 1.8V-4.5V, Vout = 3.3V/(40-50mA max) $75.00
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Click here to view our complete list of demo boards


  • 2 AA Cell to 3.3V
  • Li-Ion to 5V
  • USB On-The-Go Devices
  • White LED Drivers
  • Handheld Devices

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