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reference designBD83070GWL | Demoboard BD83070GWL Evaluation Board

ROHM BD83070GWL | Demoboard BD83070GWL Evaluation Board

synchronous buck-boost DC/DC converter

Overview

TopologyBuck-Boost Converter
Input voltage2-5.5 V
Switching frequency1350-1650 kHz
Output 12.53 V / 1 A
Output 23.33 V / 1 A
IC revision001

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.

Features

  • 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

Typical applications

  • Single Cell Li-ion or 3 Cell NiMH Battery-Powered Portable Products / Tablet Terminal Device / Smartphone

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT1(A)
ISAT2(A)
RDC max.(mΩ)
fres(MHz)
ISAT(A)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
VOP(V)
Mount
SamplesAvailability & Sample
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74438343015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 1.3 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Rated Current1.3 A
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–
DC Resistance180 mΩ
Self Resonant Frequency85 MHz
Saturation Current3 A
Performance Rated Current2.05 A
Saturation Current @ 30%3.95 A
DC Resistance150 mΩ
Operating Voltage80 V
MountSMT 
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74438323015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 1.8 A
Simu­lation
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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Rated Current1.8 A
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–
DC Resistance110 mΩ
Self Resonant Frequency65 MHz
Saturation Current3.5 A
Performance Rated Current2.85 A
Saturation Current @ 30%4.75 A
DC Resistance92 mΩ
Operating Voltage80 V
MountSMT 
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74438324015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 2.2 A
Simu­lation
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Rated Current2.2 A
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–
DC Resistance99 mΩ
Self Resonant Frequency60 MHz
Saturation Current3.7 A
Performance Rated Current3.05 A
Saturation Current @ 30%4.7 A
DC Resistance82 mΩ
Operating Voltage80 V
MountSMT 
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74479288215
SPECWE-PMCI Power Molded Chip Inductor, 1.5 µH, 3.2 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance1.5 µH
Rated Current3.2 A
Saturation Current 11.35 A
Saturation Current 23.05 A
DC Resistance77 mΩ
Self Resonant Frequency70 MHz
Saturation Current4 A
Performance Rated Current3.2 A
Saturation Current @ 30%3.05 A
DC Resistance71 mΩ
–
MountSMT 
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74405024015
SPECWE-LQSH SMT High Saturation Power Inductor, 1.5 µH, 2.1 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LQSH SMT High Saturation Power Inductor
Inductance1.5 µH
Rated Current2.1 A
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DC Resistance72 mΩ
Self Resonant Frequency68 MHz
Saturation Current3.5 A
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–
DC Resistance60 mΩ
–
MountSMT 
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74405020015
SPECWE-LQSH SMT High Saturation Power Inductor, 1.5 µH, 1.4 A
Simu­lation
Availability
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LQSH SMT High Saturation Power Inductor
Inductance1.5 µH
Rated Current1.4 A
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–
DC Resistance132 mΩ
Self Resonant Frequency74 MHz
Saturation Current2.3 A
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–
DC Resistance110 mΩ
–
MountSMT 
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