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IC manufacturers Richtek

IC manufacturers (83)

Richtek RT2857B | Demoboard DS2857B-03

6A, 18V, Synchronous Step-Down Converter

Overview

TopologyBuck Converter
Input voltage4.5-18 V
Switching frequency200-1600 kHz
Output 118 V / 6 A
IC revisionDS2857B-03

Description

6A, 18V, Synchronous Step-Down ConverterThe RT2857B is a high efficiency, monolithic synchronousstep-down DC/DC converter that can deliver up to 6A outputcurrent from a 4.5V to 18V input supply. The RT2857Bcurrent-mode architecture with external compensationallows the transient response to be optimized over a widerange of loads and output capacitors. Cycle-by-cyclecurrent limit provides protection against shorted outputsand soft-start eliminates input current surge during startup.Fault condition protections include output over-currentprotection, output over-voltage protection, and overtemperatureprotection. The low current shutdown modeprovides output disconnection, enabling easy powermanagement in battery-powered systems.

Features

 Low RDS(ON) Power MOSFET Switches 26mΩ/19mΩ Input Voltage Range : 4.5V to 18V Adjustable Switching Frequency : 200kHz to 1.6MHz Current-Mode Control Synchronous to External Clock : 200kHz to 1.6MHz Accurate Voltage Reference 0.6V ± 1%, Over −40°Cto 85°C Monotonic Start-Up into Pre-biased Outputs Adjustable Soft-Start Power Good Indicator Over-Current Protection Over-Temperature and Over-Voltage Protection Input Under-Voltage Lockout RoHS Compliant and Halogen Free

Typical applications

  • Notebook Computers
  • High Performance Point of Load Regulation / High Density and Distributed Power Systems

More information

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
LR
(µH)
ISAT,10%
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples
7443552150SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 1.5 18 1.1 6.5 5.3 63 WE-PERM SMT
744325180SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 1.8 22.1 1.4 7 3.5 70 Superflux SMT
7443552200SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 2 14.8 1.48 5 7.3 53 WE-PERM SMT
744323220SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 2.2 12.4 1.9 7 11.38 36 Superflux SMT
744325240SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 2.4 18.6 1.8 6.9 4.75 67 Superflux SMT
7443552280SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 2.8 12.1 2.1 4.8 10.6 46 WE-PERM SMT
744325330SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 3.3 16.6 2.4 5 5.9 54 Superflux SMT
744325420SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 4.2 15.4 3.3 5 7.1 33 Superflux SMT
7443552430SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 4.3 10.9 3 3.5 14.1 33 WE-PERM SMT
744325550SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 5.5 12 4.3 4.5 10.3 30 Superflux SMT
7443552560SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 5.6 8.3 4.15 3.3 20.6 30 WE-PERM SMT
Order Code Data­sheet Simu­lation
7443552150SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

744325180SPEC
7443552200SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

744323220SPEC
744325240SPEC
7443552280SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

744325330SPEC
744325420SPEC
7443552430SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

744325550SPEC
7443552560SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
LR
(µH)
ISAT,10%
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples