LTC3670

PRODUCTION

Monolithic 400mA Buck Regulator with Dual 150mA LDOs in 3mm × 2mm DFN

Data Sheet (Rev. A) Product Selection Table
Part Models
2
1ku List Price
Starting From $2.35
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Part Details

  • Triple Output Supply from a Single 2.5V to 5.5V Input
  • 400mA Buck DC/DC Plus Dual 150mA LDOs in One IC
  • Outputs Regulate Down to 0.8V
  • ±2.5% Reference Accuracy
  • Constant-Frequency 2.25MHz Operation
  • Independent Enable Pin for Each Output
  • Internal Soft-Start for Each Output
  • See datasheet for additional features
LTC3670
Monolithic 400mA Buck Regulator with Dual 150mA LDOs in 3mm × 2mm DFN
LTC3670 Application Circuit LTC3670 Pin Configuration LTC3670 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Software Resources

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Hardware Ecosystem

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LTC2934
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3670
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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
DC1277A

LTC3670EDDB Demo Board | 2.25MHz, Buck Plus Two 150mA LDOs, 2.5V ≤ VIN ≤ 5.5V, VOUT1 = 1.2V @ 400mA, VOUT2 = 2.8V @ 150mA, VOUT3 = 3.3V @ 150mA

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Product Details

Demo Circuit 1277A is a demo board that features the LTC3670, a triple power supply composed of a 400mA synchronous buck regulator and two 150mA low dropout linear regulators (LDOs). The input supply range is 2.5V to 5.5V and it provides 1.2V @ 400mA, 2.8V @ 150mA and 3.3V @ 150mA. The output regulation of the LDOs is subject to the dropout requirements based on the supply voltage.


 
DC1277A
LTC3670EDDB Demo Board | 2.25MHz, Buck Plus Two 150mA LDOs, 2.5V ≤ VIN ≤ 5.5V, VOUT1 = 1.2V @ 400mA, VOUT2 = 2.8V @ 150mA, VOUT3 = 3.3V @ 150mA
DC1277A - Schematic

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