深圳市微桥科技有限公司

AX3112A-PWM  Control 3A Step-Down ConverterDataSheet

AX3112  (AX3112-52Khz~380Khz Build in HV MOSFET 40V/2A + OCP/OVP ) High Efficiency  solution For  5V/2A 5V/2.1A solution  

Vin  : 10V~40V
Vout : 5V/2A 5V/2.1A
* Freq=50Khz~380Khz adj
* Build 3A  MOSFET. Efficiency 90% .
* Build in Line compensate +OCP+OVP function
*  Supply CC / CV for Li-on battery charger mode
* EMI & TMC Approval  available

GENERAL  DESCRIPTION
    AX3112 consists of step-down switching regulator  with PWM control. The device includes a reference voltage source, oscillation  circuit, error amplifier, internal PMOS and etc.
    AX3112 provides  low-ripple power, high efficiency, and excellent transient characteristics. The  PWM control circuit is able to the duty ratio linearly forms 0 up to 100%. An  enable function, an over current protect function and short circuit protect  function are built outside that it can set by a resistance. An internal  compensation block is built in to minimum external component count.
    With  the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode  connected externally, these ICs can function as step-down switching regulators.  They serve as ideal power supply units for portable devices when coupled with  the SOP-8L-EP package, providing such outstanding features as low current  consumption. Since this converter can accommodate an input voltage up to 38V, it  is also suitable for the operation via an AC  adapter.

FEATURES
- Input voltage：8V to 38V
-  Adjustable version output voltage range form 3.3V to 38V
- Duty ratio：0% to  100% PWM control
- Oscillation frequency：130K/350 KHz
- Enable and auto  restart control function.
- Thermal Shutdown function/Internal OVP.
-  Short Circuit Protect (SCP).
- Built-in internal SW P-channel MOS.
-  SOP-8L-EP Pb-Free package.