Part Number: LM2575HVT-ADJ

Function: SIMPLE SWITCHER 1A Step-Down Voltage Regulator

Pacakge : TO-220 Type

Manufacturer: Texas Instruments

Image and Pinouts:

 

Description

The LM2575HVT-ADJ series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed frequency oscillator. The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.

A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Features

• 3.3V, 5V, 12V, 15V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range, – 1.23V to 37V (57V for HV Version) ±4% Max Over
– Line and Load Conditions
• Specified 1A Output Current
• Wide Input Voltage Range, 40V up to 60V for HV Version
• Requires Only 4 External Components
• 52 kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability, Low Power Standby Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• P+Product Enhancement Tested

Applications:

• Simple High-Efficiency Step-Down (Buck) Regulator
• Efficient Pre-Regulator for Linear Regulators
• On-Card Switching Regulators
• Positive to Negative Converter (Buck-Boost)

Other data sheets are available within the file:

LM1575J-5.0-MPR, LM1575WG5.0-MPR, LM1575WG5.0-QML, LM2575-ADJMDC, LM2575-N

 

LM2575HVT-ADJ Datasheet PDF Download

Part Number: APL5521KC-TU

Function: Dual-Channel, 500mA, Regulator – RESET IC

Package: SOP-8 Type

Manufacturer: Anpec Electronics

Image and Pinouts:

 

Description

The APL5521KC-TU is a dual low dropout regulator with output 1 with 3.3V/0.5A and output2 with 2.5V/0.3A output capability. In order to obtain lower drop-out voltage and faster transient response, which is critical for low voltage applications, the APL5221 has been optimized.

The dropout voltages are guaran teed at 1.25V at 0.5A for output1 and 1.2V at 0.3A for output 2. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.

 

Features

• Fixed Output Voltage :
(1) VOUT1=3.3V/500mA
(2) VOUT2=2.5V/300mA

• Low Dropout Voltage (defined as the minimum input/output voltage difference):
(1) Output 1 Dropout Voltage : 1.25V (at 500mA)
(2) Output 2 Dropout Voltage : 1.2V (at 300mA)

• Stable with 10uF Output Capacitor(at VOUT1), Stable with 10uF Output Capacitor(at VOUT2)

• No Protection Diodes Needed

• Built in Thermal Protection

• Built in Current Limit Protection

• Fast transient Response

• Short Setting Time

 

Other data sheets are available within the file: APL5525, APL5526, APL5521KC

APL5521KC-TU Datasheet PDF Download