Richtek

RT2856

6A, 18V, Synchronous Step-Down Converter

Topology: Buck
Input Voltage (min.): 4.50 V
Input Voltage (max.): 18.00 V
Switching Frequency (min.): 200.00 kHz
Switching Frequency (max.): 1600.00 kHz
Output 1: 1.80 V / 6.000 A

Original publication on 2016-10-10, revision DS2856

Description

6A, 18V, Synchronous Step-Down ConverterDS2856-10 October 2016The RT2856 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT2856 current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during startup. Fault condition protections include output under-voltage protection, output over-voltage protection, and overtemperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.

Characteristics

  • 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 0.8V ± 1%, Over −40°Cto 85°C Monotonic Start-Up into Pre-biased Outputs Adjustable Soft-Start Power Good Indicator Under-Voltage and Over-Voltage Protection Input Under-Voltage Lockout RoHS Compliant and Halogen Free

Products

  Order Code SPEC Product series L
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
Material Version Samples
7443551370 PDF WE-HCI SMT Flat Wire High Current Inductor 3.7 17 2.6 16 4.9 26 WE-PERM SMT
7443550320 PDF WE-HCI SMT Flat Wire High Current Inductor 3.2 16 2.2 15 5.3 34 WE-PERM SMT
7443550480 PDF WE-HCI SMT Flat Wire High Current Inductor 4.8 11 3.55 13 10.5 28 WE-PERM SMT
744325420 PDF WE-HCI SMT Flat Wire High Current Inductor 4.2 11 3.3 14 7.1 33 Superflux SMT
744325550 PDF WE-HCI SMT Flat Wire High Current Inductor 5.5 10 4.3 12 10.3 30 Superflux SMT
744325330 PDF WE-HCI SMT Flat Wire High Current Inductor 3.3 12 2.4 15 5.9 54 Superflux SMT

Other applications and Würth Elektronik products for this IC

  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 5.00 V / 6.000 A
  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 1.50 V / 6.000 A
  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 1.00 V / 6.000 A
  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 2.50 V / 6.000 A
  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 1.20 V / 6.000 A
  • RT2856
    Topology: Buck, Input Voltage (min.): 4.50 V, Input Voltage (max.): 18.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1600.00 kHz, Output 1: 3.30 V / 6.000 A