LTC3700
Info: : PRODUCTION
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LTC3700

Constant Frequency Step-Down DC/DC Controller with LDO Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.84
Features
  • Dual Output Regulator in Tiny 10-Pin MSOP
  • High Efficiency: Up to 94%
  • Wide VIN Range: 2.65V to 9.8V
  • Constant Frequency 550kHz Operation
  • 150mA LDO Regulator with Current Limit and Thermal Shutdown Protection
  • High Output Currents Easily Achieved
  • Burst Mode® Operation at Light Load
  • Low Dropout: 100% Duty Cycle
  • Current Mode Operation for Excellent Line and Load Transient Response
  • 0.8V Reference Allows Low Output Voltages
  • Low Quiescent Current: 260µA Total
  • Shutdown Mode Draws Only 10µA Supply Current
  • Common Power Good Output for Both Supplies
Additional Details
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The LTC3700 is a constant frequency current mode stepdown (buck) DC/DC controller with excellent AC and DC load and line regulation. The on-chip 150mA low dropout (LDO) linear regulator can be powered from the buck controller’s input supply, its own independent input supply or the buck regulator’s output. The buck controller incorporates an undervoltage lockout feature that shuts down the controller when the input voltage falls below 2.1V.

The buck regulator provides a ±2.5% output voltage accuracy. It consumes only 210µA of quiescent current in normal operation with the LDO consuming an additional 50µA. In shutdown, a mere 10µA (combined) is consumed.

For applications where efficiency is a prime consideration, the buck controller is configured for Burst Mode operation which enhances efficiency at low output current. To further maximize the life of a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). High constant operating frequency of 550kHz allows the use of a small external inductor.

The LDO is protected by both current limit and thermal shutdown circuits.

The LTC3700 is available in a tiny 10-pin MSOP.

Applications

  • Notebook Computers
  • Portable Instruments
  • One or Two Li-Ion Battery-Powered Applications
Part Models 2
1ku List Price Starting From $2.84

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3700EMS#PBF

PRODUCTION

LTC3700EMS#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3700EMS#PBF

PRODUCTION

LTC3700EMS#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC463A

LTC3700EMS | Step-Down Regulator With LDO, 5 - 9Vin1, 3.3VOUT1 @ 1A, Jumper Sel. 3.3 - 5VIN2, 2.5VOUT2 @ 150mA

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DC463A

LTC3700EMS | Step-Down Regulator With LDO, 5 - 9Vin1, 3.3VOUT1 @ 1A, Jumper Sel. 3.3 - 5VIN2, 2.5VOUT2 @ 150mA

LTC3700EMS | Step-Down Regulator With LDO, 5 - 9Vin1, 3.3VOUT1 @ 1A, Jumper Sel. 3.3 - 5VIN2, 2.5VOUT2 @ 150mA

Product Detail

DC463A: Demo Board for LTC3700 Constant Frequency Step-Down DC/DC Controller with LDO Regulator.

Tools & Simulations

Tools & Simulations 1

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.

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