特性 Features

Adjustable Relative Constant on-time for fast

dynamic response

Programmable VOUT range = 0.7V~20V

VIN range = 3V~28V

Wide Output Load Range: 0 to 15A

1% reference accuracy over load and line

Low voltage DC current sense using low-side

RDS _ON_L Sensing or sense resistor

Resistor programmable frequency

Cycle-by-cycle current limit

3-Step Current Limit During Soft-start

Over-voltage/under-voltage fault protection

Low quiescent power dissipation

Power good indicator/ Power save option

Integrated gate drivers with fast transmission

scheme

Enable pin

Over temperature protection(Non-Latch)

TQFN40-5x5 Package

Green Product (RoHS, Lead-Free,

Halogen-Free Compliant)

Applications

Notebook computers

CPU core/IO Supplies

Chip/RAM Supplies

General Description

The GS9215 is small size chip with a relative

constant on-time synchronous buck converter

suitable for applications in notebook computers

and other battery operated portable devices.

Features include very wide input voltage range,

high efficiency and a fast dynamic response with

internal fast response scheme.

The GS9215 have a unique power save mode,

which can save battery power supply by

decreasing frequency when load current falls

down below preset critical current point.

The fast dynamic transient response means that

buck applications based on GS9215 will provide

about 100ns-order response to load when output

voltage falls down or rises up. The frequency will

increase or decrease to meet the change in

output load. Moreover, the GS9215 will take the

same method to regulate the output voltage when

input voltage changes. When transient response

regulated, the controller will maintain a new

steady-state operation. Both the transient

response state and the new state, the GS9215

always has the same on-time.

The GS9215 is suitable for the solutions which

have the output voltage between 0.7V and 20V.

An external setting resistor and output voltage

can set the on-time, duty-cycle and frequency for

the controller. The integrated gate drivers feature

adaptive shoot-through protection, fast signal

transmission. Additional features include current

limit, soft-start, over-voltage and under-voltage

protection, a Power Good flag and soft discharge

upon shutdown. The GS9215 is available in

package TQFN40-5x5.