BU33UV7NUX
同步整流　升壓DC/DC轉換器

BU33UV7NUX是消耗電流較低的同步整流升壓DCDC轉換器，作為升壓電源，適用於使用2 CELL鹼性、鎳鎘、鎳氫電池或1 CELL鋰離子、鋰聚合物電池的產品。即使2 CELL乾電池的電壓降至1.8V，仍可提供最大500mA輸出負載。而且，BU33UV7NUX還搭載了復位IC功能（檢出：1.5V, 解除：1.9V）。BU33UV7NUX的輸出電壓固定為3.3V，如果Vin電壓超過3.3V的輸出電壓，則Vin與Vout會在內部連接。

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Product Detail

 
料號 | BU33UV7NUX-E2
狀態 | 推薦品
封裝 | VSON010X3020
單位數量 | 4000
最小包裝數量 | 4000
包裝形式 | Taping
RoHS | Yes

規格:

Grade

Standard

ch

1

Integrated FET / Controller

Integrated FET

Topology

Boost

Synchronous / Nonsynchronous

Synchronous

Vin1(Min.)[V]

0.6

Vin1(Max.)[V]

4.5

Vout1(Min.)[V]

3.3

Vout1(Max.)[V]

3.3

Iout1(Max.)[A]

0.5

SW frequency(Max.)[MHz]

0.8

Light Load mode

Yes

EN

Yes

PGOOD

No

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

85

功能:

  • Synchronous Boost DC/DC Converter
    Iomax500mA @Vout=3.3V, Vin=1.8V (Ta=25°C)
  • Disconnect Function during EN-OFF and UVLO
  • Auto-PFM/PWM (MODE=H(=VIN)),
    FIXED PFM (MODE=L(=0V))
  • Reset Function (Detect Voltage = 1.5V)
  • Pass-Through Function (VIN > VOUT)
  • Thermal Shutdown
  • 10-pin “VSON010X3020” package

Evaluation
Board

 
    • Evaluation Board
    • BU33UV7NUX-EVK-101

    • The BU33UV7NUX converter provides a power supply solution for products powered by two-cell alkaline, NiCd, NiMH, one-cell Li-ion, or Li-polymer batteries. It can operate even if the input voltage drops to 0.6V. The BU33UV7NUX has a built-in reset circuit that can be set to detect reset at 1.5V (reset release voltage: 1.9V).

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Design Resources

 

Documents

White Paper

  • Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs

User's Guide

  • Evaluation Board User's Guide

Technical Articles

Schematic Design & Verification

  • Calculation of Power Dissipation in Switching Circuit
  • Considering Input Filter to Reduce Conducted Emissions by DCDC Converter
  • Considering Polarity of Power Inductor to Reduce Radiated Emission of DC-DC converter
  • Method for Monitoring Switching Waveform
  • Phase Compensation Design for Current Mode Buck Converter
  • Power Supply Sequence Circuit with General Purpose Power Supply IC
  • Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter
  • Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)
  • Usage of SPICE Macromodel for DC/DC
  • Calculation of Power Loss (Synchronous)
  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Notes for Temperature Measurement Using Thermocouples
  • Two-Resistor Model for Thermal Simulation
  • Notes for Temperature Measurement Using Forward Voltage of PN Junction
  • Thermal Resistance
  • Precautions When Measuring the Rear of the Package with a Thermocouple

Tools

2D/3D/CAD

  • VSON010X3020 Footprint / Symbol
  • VSON010X3020 3D STEP Data

Packaging & Quality

Manufacturing Data

  • Factory Information

Environmental Data

  • REACH SVHC Non-use Declaration