LTC3704

PRODUCTION

Wide Input Range, No RSENSE™ Positive-to-Negative DC/DC Controller

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $2.48
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Part Details

  • High Efficiency Operation (No Sense Resistor Required)
  • Wide Input Voltage Range: 2.5V to 36V
  • Current Mode Control Provides Excellent Transient Response
  • High Maximum Duty Cycle (Typ 92%)
  • ±1% Internal Voltage Reference
  • ±2% RUN Pin Threshold with 100mV Hysteresis
  • Micropower Shutdown: IQ = 10µA
  • Programmable Switching Frequency (50kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock Up to 1.3 × fOSC
  • User-Controlled Pulse Skip or Burst Mode® Operation
  • Internal 5.2V Low Dropout Voltage Regulator
  • Capable of Operating with a Sense Resistor for High Output Voltage Applications (VDS >36V)
  • Small 10-Lead MSOP Package
LTC3704
Wide Input Range, No RSENSE™ Positive-to-Negative DC/DC Controller
High Efficiency Positive to Negative Supply Conversion Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 2

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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Hardware Ecosystem

Parts Product Life Cycle Description
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RECOMMENDED FOR NEW DESIGNS Positive High Voltage Ideal Diode-OR with Input Supply and Fuse Monitors
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LTC6902
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3704
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
DC518A

LTC3704EMS Demo Board | 4.5V to 15VIN, –70VOUT1 @ 200mA, –24VOUT2 @ 200mA

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Product Details

Demonstration circuit 518 is a SLIC (Subscriber Line Interface Circuit) positive input to negative output converter featuring the LTC3704 switching controller. DC518 converts 4.5V to 15V input to –24V at 200mA and –70V at 200mA at its output. The demo board uses a transformer with the three primary side widings in parallel to generate three –24V outputs. By stacking the voltages on top of each other, –70V ±10% is obtained. The demo board operates at 200kHz with high efficiency of up to 92%.

eval board
schematic 2
DC524A

LTC3704EMS Demo Board | Positive to Negative Converter, 5V to 15VIN, –5.2VOUT @ 2.5A

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Product Details

Demonstration circuit 524 is a positive input to negative output converter featuring the LTC3704 switching controller. The DC524 converts a 5V to 15V input to a –5.2V output and provides up to 2.5A of output current from 5V input. The converter operates at 300kHz with a high efficiency of 89%. The DC524 is set to operate in No RSENSE™ mode with input voltages up to 15V. However, DC524 can be modified for higher input voltages with an optional current sense resistor. The circuit features optional soft-start circuitry that can be enabled or disabled with a single jumper. Also, DC524 has a jumper to program either continuous or Burst Mode™ operation. The DC524 can be synchronized to an external clock of up to 400kHz.
DC518A
LTC3704EMS Demo Board | 4.5V to 15VIN, –70VOUT1 @ 200mA, –24VOUT2 @ 200mA
DC518A - Schematic
DC524A
LTC3704EMS Demo Board | Positive to Negative Converter, 5V to 15VIN, –5.2VOUT @ 2.5A
DC524A - Schematic

Latest Discussions

2 Years Ago
RE: LTC3704 Soft start
3 Years Ago
RE: LTC3704 for 9A current output at -5.5V
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