LP38869中文资料具有使能功能的 1A、高 PSRR、超低压降稳压器数据手册TI规格书

描述 Description

The LP38869 low-dropout linear regulator operates with an input voltage supply from +2.7V to +5.5V input, and delivers a specified 1A load current with a low 200 mV dropout. The high 50 dB PSRR at 100 kHz results from a high gain control loop that also yields excellent transient response. Coupled with a high accuracy output voltage, ±0.75 % over temperature, the LP38869 is an ideal power supply for FPGAs, DSPs or MCUs. Output voltage is preset at +2.5V, or may be adjustable between +0.8V to +5V with an external resistor divider.The LP38869 only needs 1 μF output capacitance for stability. The FlexCap compensation allows the use of any type of output capacitor, regardless of ESR. Other features include: Soft-Start; delayed reset output; low-power shutdown; short-circuit protection; and thermal shutdown protectionGround Pin Current: Typically less than 1 mA at 1A loadShutdown Mode: Typically 2 µA quiescent current when the SHDN pin is pulled low.Simplified Compensation: Stable with any type of output capacitor.

特性 Features

• Operating Input Supply Range: +2.7V to + 5.5V
• Maximum Continuous Output Current: 1A
• Preset Output Voltage of 2.5V, or Adjustable Output Voltage From 0.8V to 5.0V
• Pre-Set Output Initial VOUT Tolerance ±0.5%
• Adjustable VREF Tolerance of ±0.75%
• PSRR of 50dB at 100kHz
• Low 200 mV Dropout at 1A
• Typical 2 µA Supply Current in Shutdown Mode
• Adjustable Soft-Start for Output Current
• Fold-Back Output Current Limit
• Stable With Ceramic, Tantalum, or Aluminum Capacitors
• Stable With 1uF Input/Output Capacitors
• Thermal Shutdown
• 16-pin HTSSOP Package