LP38859

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3A、低输入电压 (1.15V)、高精度、超低压降稳压器

产品详情

Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.15 Vout (max) (V) 1.2 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2 Noise (µVrms) 150 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 43 Rating Catalog Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Soft start Accuracy (%) 1 PSRR at 100 KHz (dB) 37 Dropout voltage (Vdo) (typ) (mV) 350 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.15 Vout (max) (V) 1.2 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2 Noise (µVrms) 150 Iq (typ) (mA) 10 Thermal resistance θJA (°C/W) 43 Rating Catalog Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Soft start Accuracy (%) 1 PSRR at 100 KHz (dB) 37 Dropout voltage (Vdo) (typ) (mV) 350 Operating temperature range (°C) -40 to 125
TO-220 (NDH) 5 86.0552 mm² 10.16 x 8.47 TO-263 (KTT) 5 154.8384 mm² 10.16 x 15.24
  • Input Voltage: 1.1 V to 5.5 V
  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Standard VOUT Values: 0.8 V and 1.2 V
  • Stable With 10-µF Ceramic Capacitors
  • Dropout Voltage of 240 mV (typical) at 3-A Load Current
  • Programmable Soft-Start Time
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1% VOUT for TJ = 25°C
    • ±2% VOUT for 0°C ≤ TJ ≤ +125°C
    • ±3% VOUT for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Operating Temperature Range: −40°C to +125°C
  • Input Voltage: 1.1 V to 5.5 V
  • Wide VBIAS Supply Operating Range: 3 V to 5.5 V
  • Standard VOUT Values: 0.8 V and 1.2 V
  • Stable With 10-µF Ceramic Capacitors
  • Dropout Voltage of 240 mV (typical) at 3-A Load Current
  • Programmable Soft-Start Time
  • Precision Output Voltage Across All Line and Load Conditions:
    • ±1% VOUT for TJ = 25°C
    • ±2% VOUT for 0°C ≤ TJ ≤ +125°C
    • ±3% VOUT for –40°C ≤ TJ ≤ +125°C
  • Overtemperature and Overcurrent Protection
  • Operating Temperature Range: −40°C to +125°C

The LP38859 is a high-current, fast-response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power transistor, while VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra-low VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP microcontroller core voltages and switch-mode power-supply post-regulators. The LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP38859 is a high-current, fast-response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power transistor, while VIN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra-low VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of this device makes it suitable for use in powering DSP microcontroller core voltages and switch-mode power-supply post-regulators. The LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.

For all available packages, see the orderable addendum at the end of the data sheet.

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类型 标题 下载最新的英语版本 日期
* 数据表 LP38859 3-A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start 数据表 (Rev. F) PDF | HTML 2015年 9月 27日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
选择指南 Low Dropout Regulators Quick Reference Guide (Rev. P) 2018年 3月 21日
选择指南 低压降稳压器快速参考指南 (Rev. M) 最新英语版本 (Rev.P) 2017年 1月 5日
EVM 用户指南 AN-1480 LP38859S-1.2 Evaluation Board (Rev. B) 2013年 4月 24日
应用手册 Application Note 1480 LP38859S-1.2 Evaluation Board (cn) 2006年 11月 3日

设计和开发

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封装 引脚 下载
TO-220 (NDH) 5 查看选项
TO-263 (KTT) 5 查看选项

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

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