LTC3607 - Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator

Features

  • High Efficiency: Up to 96%
  • Very Low Quiescent Current: 55μA Total
  • 2.25MHz Constant Frequency Operation
  • Low Dropout Operation: 100% Duty Cycle
  • Low-Ripple <30mVP-P Burst Mode® Operation
  • Peak Current-Mode Control Architecture for Excellent Line and Load Transient Response
  • Wide Voltage Input Range: 4.5V to 15V
  • 600mA/Channel Rated Output Current
  • 0.6V Reference Allows Low Output Voltages
  • ±1.5% Output Voltage Accuracy
  • Ultralow Shutdown Current: IQ < 1μA
  • Internal Compensation
  • Power Good Outputs
  • Externally Frequency Synchronization (1MHz to 4MHz)
  • Independent Internal Soft-Start for Each Channel
  • Small 16-Lead Thermally Enhanced Thin QFN (3mm × 3mm) and MSE Packages

Typical Application

LTC3607 Typical Application
LTC3607 Typical Application

Description

The LTC®3607 is a 15V dual 600mA monolithic synchronous step-down regulator which has only 55μA quiescent current. Intended for a variety of applications, including dual lithium-ion battery products, it operates from a wide 4.5V to 15V input voltage range. It features a constant 2.25MHz switching frequency, enabling the use of tiny, low cost capacitors and inductors 1mm or less in height. Each output voltage is adjustable from 0.6V to VIN. The internal synchronous power switches provide high efficiency without the need for external Schottky diodes.

A user selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest ripple noise.

To further the maximize battery run time, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle). In shutdown, the device draws <1μA.

Packaging

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

QFN-16

LTC3607 Package Drawing
LTC3607 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3607EMSE#PBF MSOP 16 E $3.50 $2.45 View
LTC3607EMSE#TRPBF MSOP 16 E $2.51 View
LTC3607EUD#PBF QFN 16 E $3.36 $2.35 View
LTC3607EUD#TRPBF QFN 16 E $2.41 View
LTC3607IMSE#PBF MSOP 16 I $3.86 $2.70 View
LTC3607IMSE#TRPBF MSOP 16 I $2.76 View
LTC3607IUD#PBF QFN 16 I $3.70 $2.59 View
LTC3607IUD#TRPBF QFN 16 I $2.65 View
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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
DC1596A LTC3607EUD Demo Board (QFN) | 4.5V ≤ VIN ≤ 15V; VOUT1: 1.2V/1.5V/1.8V @ 0.6A, VOUT2: 2.5V/3.3V/5V @ 0.6A. $125.00
DC1847A LTC3607EMSE Demo Board (MSOP) | 4.5V ≤ VIN ≤ 15V; VOUT1: 1.2V/1.5V/1.8V @ 0.6A, VOUT2: 2.5V/3.3V/5V @ 0.6A. Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Dual Lithium-Ion Battery Supplies
  • Automotive Applications
  • Servers

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
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Models for the following parts are available in LTspice IV:
LTC3607

Technical Support