CD2576DT Voltage regulator-ChisynV Microelectronics (Beijing) Co., Ltd.

The CD2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the CD2576 are offered by several different inductor manufacturers. Since the CD2576 converter is a switch–mode power supply, its efficiency is significantly higher in comparison with popular three–terminal linear regulators, especially with higher input voltages. In many cases, the power

dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the CD2576 are available from several different manufacturers. This feature greatly simplifies the design of switch–mode power supplies. The CD2576 features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency (±2% over 0℃ to 125℃). External shutdown is included, featuring 80 ㎂(typical) standby current. The output switch includes cycle–by–cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Parameters

Input Voltage(Min)(V):4
Input Voltage(Max)(V):40
Output Voltage(Min)(V):3.3
Output Voltage(Max)(V):37
Output Current(Max)(A):3
Output channel(#):1
Switching Frequency(Min) (kHz):42
Switching Frequency(Max)(kHz):63
Quiescent Current(mA):5

Features

3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
Adjustable Version Output Voltage Range,1.23 to 37 V ±4%
Maximum Over Line and Load Conditions
Guaranteed 3.0 A Output Current
Wide Input Voltage Range
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

Application

Simple High–Efficiency Step–Down (Buck) Regulator
Efficient Pre–Regulator for Linear Regulators
On–Card Switching Regulators
Positive to Negative Converter (Buck–Boost)
Negative Step–Up Converters
Power Supply for Battery Chargers

Parameters

MALL MALL

Part Number

Package

Vin (Min) (V)

Vin (Max) (V)

Vout (Min) (V)

Vout (Max) (V)

Iout (Max) (A)

Iq Typ (mA)

Requlated outputs (#)

Switching Frequency (Min) (kHz)

Switching Frequency (Max) (kHz)

Temp Range(°C)

Open

CD2576DS-ADJ

CD2576系列稳压器是单片集成电路，适用于简单方便的降压开关稳压器(降压变换器)设计。该系列的所有电路都能够驱动3.0 a负载，具有良好的线路和负载调节能力。这些设备可在固定输出电压3.3 V, 5.0 V, 12v, 15v和可调输出版本。这些稳压器旨在最大限度地减少外部组件的数量，以简化电源设计。为与 CD2576 一起使用而优化的标准系列电感器由多个不同的电感器制造商提供。由于 CD2576 转换器是开关模式电源，与流行的三端线性稳压器相比，其效率明显更高，尤其是在输入电压更高的情况下。在

Datasheet

PackageTO-220-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DT-ADJ

Datasheet

PackageTO-263-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DS-3.3

Datasheet

PackageTO-220-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DT-3.3

Datasheet

PackageTO-263-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DS-5.0

Datasheet

PackageTO-220-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DT-5.0

Datasheet

PackageTO-263-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DS-12

Datasheet

PackageTO-220-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DT-12

Datasheet

PackageTO-263-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DS-15

Datasheet

PackageTO-220-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

CD2576DT-15

Datasheet

PackageTO-263-5

Vin (Min) (V) 4

Vin (Max) (V) 40

Vout (Min) (V) 3.3

Vout (Max) (V) 37

Iout (Max) (A) 3

Iq Typ (mA) 1

Requlated outputs (#) 42

Switching Frequency (Min) (kHz) 63

Switching Frequency (Max) (kHz) 5

Temp Range(°C) -40 to 125

Open

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CD2576DT | CAD Modle