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IC manufacturers Analog Devices

IC manufacturers (97)

Analog Devices LT3988

Dual 60V Monolithic 1A Step-Down Switching Regulator

Overview

TopologyBuck Converter
Input voltage4.1-60 V
Switching frequency250-2500 kHz
Output 11 A

Description

The LT®3988 is a dual, current mode, step-down, DC/DC converter that accepts two input voltages up to 60V (80V transient), which may be driven from separate supplies or can be cascaded. High efficiency switches are included on the die along with internal boost diodes and loop compensation.Both converters are capable of generating 1A outputs, are synchronized to a single oscillator programmable up to 2.5MHz, and run with opposite phases, reducing input ripple current.The switching frequency is set with a single resistor yielding a range of 250kHz to 2.5MHz, or a clock signal can be applied to the SYNC pin. The LT3988’s high switching frequency allows the use of small inductors and capacitors, resulting in a very small dual output supply. The constantswitching frequency, combined with low impedance ceramic capacitors, results in low, predictable output ripple.A current mode PWM architecture provides fast transient response with cycle-by-cycle current limiting. Diode current sense and thermal shutdown provide additional protection.The LT3988 is available in a 16-lead MSOP package with an exposed pad for low thermal resistance.

Features

  • Wide Input Range:Operation from 4.1V to 60VOvervoltage Lockout Protects Circuit Through 80V Transients
  • Two 1A Output Switching Regulators with Internal Power Switches
  • Short Circuit Robust
  • Adjustable 250kHz to 2.5MHz Switching Frequency,
  • Synchronizable Over the Full Range
  • Integrated Boost Diodes
  • Integrated Loop Compensation
  • Anti-Phase Switching Reduces Ripple
  • Low Shutdown IQ (<2μA)
  • Uses Small Inductors and Ceramic Capacitors
  • Thermally Enhanced, 16-Lead MSOP PackageREMARKS:-Table 1.InductorsPage no 10

Typical applications

  • Distributed Supply Regulation
  • Industrial Supplies
  • Commercial Vehicle Battery Regulation

Products

Order Code Data­sheet Downloads Status Product series Samples
744777133
Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor
74477730
Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor
7447730
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
744773047
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
74477310
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
744773133
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
744773168
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
74477610
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
744776133
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
74477620
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
744776282
Active i| Production is active. Expected lifetime: >10 years.WE-PD2 SMT Power Inductor
Samples
Order Code Data­sheet Downloads Status Product series Samples