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LM8850

アクティブ

モバイル・デバイス内の大電力アプリケーション向け、高性能、昇圧 DC/DC コンバータ

ご注文はこちら
データシート

LM8850

アクティブ
データシート ご注文はこちら

製品詳細

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2750 Features Enable, Synchronous Rectification Vout (min) (V) 3.6 Vout (max) (V) 5.7 Iq (typ) (µA) 6 Duty cycle (max) (%) 60 Switch current limit (typ) (A) 1
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2750 Features Enable, Synchronous Rectification Vout (min) (V) 3.6 Vout (max) (V) 5.7 Iq (typ) (µA) 6 Duty cycle (max) (%) 60 Switch current limit (typ) (A) 1
DSBGA (YPD) 9 3.0625 mm² 1.75 x 1.75
  • 6µA typ. Quiescent Current
  • VOUT = 3.6V to 5.7V (max VO = 5.7V)
  • Operates from a Single Lithium Ion Cell (2.3V to 5.5V)
  • 8 User-selectable Output Voltages via I2C
  • High-speed 3.4 MHz I2C-compatible Interface
  • Up to 1.0A Maximum Load Current Capability
  • 4 Levels of Current Limiting
  • Auto-mode Operation and Forced PWM
  • 2.5 MHz Switching Drequency (typ.)
  • ±2.5% DC Output Voltage Precision
  • 1.0 µH Inductor (2520 Case Size)
  • 4.7 µF Input and Output Capacitors (0603 case size)
  • PGOOD Signal
  • True Shutdown Isolation
  • Output Over-voltage Protection
  • Internal Active Voltage Balancing for Supercapacitors
  • DSBGA 9-bump Package
    • (1.58 mm x 1.62 mm x 0.35 mm)(0.5 mm pitch)

All trademarks are the property of their respective owners.

  • 6µA typ. Quiescent Current
  • VOUT = 3.6V to 5.7V (max VO = 5.7V)
  • Operates from a Single Lithium Ion Cell (2.3V to 5.5V)
  • 8 User-selectable Output Voltages via I2C
  • High-speed 3.4 MHz I2C-compatible Interface
  • Up to 1.0A Maximum Load Current Capability
  • 4 Levels of Current Limiting
  • Auto-mode Operation and Forced PWM
  • 2.5 MHz Switching Drequency (typ.)
  • ±2.5% DC Output Voltage Precision
  • 1.0 µH Inductor (2520 Case Size)
  • 4.7 µF Input and Output Capacitors (0603 case size)
  • PGOOD Signal
  • True Shutdown Isolation
  • Output Over-voltage Protection
  • Internal Active Voltage Balancing for Supercapacitors
  • DSBGA 9-bump Package
    • (1.58 mm x 1.62 mm x 0.35 mm)(0.5 mm pitch)

All trademarks are the property of their respective owners.

LM8850 is a step-up DC-DC converter optimized for use with a supercapacitor to protect a battery from power surges and enable new high power applications in mobile device architectures. The device creates an ideal rail from 3.6V to 5.7V boosting from a single Li-Ion cell with an input voltage range of 2.3V to 5.5V; Target VOUT must be at least 10% higher than VIN.

An I2C interface controlling multiple output voltage settings, input current limits, and load currents up to 1A provides superior user flexibility. The LM8850 operates in Auto mode, where the converter is in PFM mode at light loads and switches to PWM mode at heavy loads. Hysteretic PFM extends the battery life by reduction of the quiescent current to 6µA (typ.) during light load and standby conditions. Synchronous operation provides true shutdown isolation and improves its efficiency at medium-to-full load conditions.

High-switching frequency enables smaller passive components. Internal compensation is used for a broader range of inductor and output capacitor values to meet system demand and achieve small system solution size.

LM8850 is available in a 9-bump ultra-thin DSBGA package. Only four external surface-mount components, a 1.0 µH inductor, a 4.7 µF for input capacitor, 4.7 µF for output capacitor and 0.05F-1.0F supercapacitor for energy storage are required.

LM8850 is a step-up DC-DC converter optimized for use with a supercapacitor to protect a battery from power surges and enable new high power applications in mobile device architectures. The device creates an ideal rail from 3.6V to 5.7V boosting from a single Li-Ion cell with an input voltage range of 2.3V to 5.5V; Target VOUT must be at least 10% higher than VIN.

An I2C interface controlling multiple output voltage settings, input current limits, and load currents up to 1A provides superior user flexibility. The LM8850 operates in Auto mode, where the converter is in PFM mode at light loads and switches to PWM mode at heavy loads. Hysteretic PFM extends the battery life by reduction of the quiescent current to 6µA (typ.) during light load and standby conditions. Synchronous operation provides true shutdown isolation and improves its efficiency at medium-to-full load conditions.

High-switching frequency enables smaller passive components. Internal compensation is used for a broader range of inductor and output capacitor values to meet system demand and achieve small system solution size.

LM8850 is available in a 9-bump ultra-thin DSBGA package. Only four external surface-mount components, a 1.0 µH inductor, a 4.7 µF for input capacitor, 4.7 µF for output capacitor and 0.05F-1.0F supercapacitor for energy storage are required.

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種類 タイトル 最新の英語版をダウンロード 日付
* データシート High-Performance, Step-Up DC-DC Converter for High-Power Apps in Mobile Devices データシート (Rev. C) 2013年 5月 3日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点

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