ROHM

BD83070GWL
Demoboard BD83070GWL Evaluation Board

synchronous buck-boost DC/DC converter

Topology: Buck-Boost
Input Voltage (min.): 2.00 V
Input Voltage (max.): 5.50 V
Switching Frequency (min.): 1350.00 kHz
Switching Frequency (max.): 1650.00 kHz
Output 1: 2.53 V / 1.000 A
Output 2: 3.33 V / 1.000 A

Original publication on 2019-09-04, revision 001

Description

The BD83070GWL is a synchronous buck-boost DC/DC convertor providing 3.3 V or 2.5 V output from single-cell Li-ion battery or other input between 2.0 V and 5.5 V. It has the capability to support up to 1 A output over input voltage range of 2.7 V to 5.5 V. It seamlessly changes between buck and boost operations depending on the input voltage. It is based on pulse width modulation (PWM) and provides high efficiency for heavy load. While in PWM operation, internal FETs switch at fixed frequency 1.5 MHz typical. It automatically changes over control system to hysteresis pulse frequency modulation (PFM) to suppress switching loss and current consumption during light load. Battery drain fall down to only 2.8 μA typical at no load current. It is possible to disable auto-PFM/PWM mode by the MODE pin for suppressing output ripple and fixed frequency switching. The device is packaged in a 1.2 mm x 1.6 mm WLCSP package.

Characteristics

  • Automatic PFM/PWM Transition
  • Output Current: Up To 1 A (VIN > 2.7 V, VOUT = 3.3 V)
  • Selectable Output Voltage: 2.5 V or 3.3 V
  • Efficiency: Up To 95 %
  • UVLO Detection:1.61 V(Max)
  • Built-in Thermal, Over Voltage, And Over Current Protection

Products

  Order Code SPEC Product series L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Montageart IR 1
(mA)
IR 2
(mA)
Samples
74438324015 PDF WE-MAPI SMT Power Inductor 1.5 2.2 3.7 82 99 60 SMT
74438323015 PDF WE-MAPI SMT Power Inductor 1.5 1.8 3.5 92 110 65 SMT
74438343015 PDF WE-MAPI SMT Power Inductor 1.5 1.3 3 150 180 85 SMT
74405020015 PDF WE-LQSH SMT High Saturation Power Inductor 1.5 1.4 2.3 110 132 74
74405024015 PDF WE-LQSH SMT High Saturation Power Inductor 1.5 2.1 3.5 60 72 68
74479288215 PDF WE-PMCI Power Molded Chip Inductor 1.5 4000 56 65 49 SMT 1600 2200