Buck

G5201 Datasheet – Voltage-Mode Buck PWM Controller – GMT

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Part Number: G5201

Function: 5V/12V Input Voltage-Mode Buck PWM Controller

Package: SOP 8 Pin Type

Manufacturer: Global Mixed-mode Technology Inc. ( http://www.gmt.com.tw )

Pinout :
G5201 datasheet pinout

Description

G5201P11U is Marking G5201.

The G5201 provides complete control and protection for a DC-DC converter for high power applications. It is designed to drive two N-channel MOSFETs in a synchronous-rectified buck topology. The G5201 integrates all of the control, and protection functions into a single package.
The G5201 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 300kHz free-running triangle-wave oscillator. The error amplifier features a 15MHz gain-band width product which provides high converter band width for fast transient performance. The resulting PWM duty ratio ranges from 0% to 80%. The reference voltage is 0.8V, 2% accuracy.

Typical Application Circuit :

G5201 circuit

G5201 Datasheet PDF Download


 

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LM25085 Datasheet PDF – PFET Buck Switching Controller

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Part Number: LM25085

Function: 42V Constant On-Time PFET Buck Switching Controller

Package: VSSOP, WSON, HVSSOP 8 Pin Type

Manufacturer: Texas Instruments

Pinouts:

LM25085 datasheet

 

Description

The LM25085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5V to 42V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response.

The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the R DS(ON) of the PFET or an external sense resistor can be used to sense current for over current detection.

Schematic

components

Features

1. Programmable Switching Frequency to 1MHz
2. No Loop Compensation Required
3. Ultra-Fast Transient Response
4. Adjustable Output Voltage from 1.25V
5. Integrated High Voltage Bias Regulator

Applications

1. Automotive Infotainment
2. Battery/Super Capacitor Chargers
3. LED Drivers

Other data sheets are available within the file:

LM25085-Q1, LM25085MM/NOPB, LM25085MME/NOPB, LM25085MMX/NOPB

LM25085 Datasheet PDF Download


LM25085 pdf