MPM38111GR-P

Due to market price fluctuations,if you need to purchase or consult the price.You can contact us or emial to us:   sales@allicdata.com

1. DESCRIPTION

The MPM38111 is a dual-channel DC/DC module. The module includes a monolithic,step-down, switch-mode converter with built-in,internal power MOSFETs and inductors. The MPM38111 is designed to simplify power system design and provide ease of use. The MPM38111 operates from a 2.7V to 6V input, generates an output voltage as low as 0.608V, and has a 45µA quiescent current,making it ideal for powering portable equipment that run on a single-cell Lithium-ion (Li+) battery. The MPM38111 integrates dual, 85mΩ,high-side switches and 40mΩ synchronous rectifiers for high efficiency without an external Schottky diode. Peak-current-mode control and internal compensation limit the minimum number of readily available external components. Full protection features include cycle-by-cycle current limiting and thermal shutdown. The MPM38111 is available in a small, surfacemounted, QFN-14 (4mmx4mmx1.6mm) package.

2. FEATURES

   1. Dual 1A Output Current

   2. >93% Peak Efficiency

   3. >80% Light-Load Efficiency

   4. Ultra-Low IQ: 45μA

   5. 85mΩ and 40mΩ Internal Power MOSFET

   6. Wide 2.7V to 6V Operating Input Range

   7. Default 1MHz Switching Frequency

   8. 180° Phase-Shifted Operation

   9. 100% Duty Cycle Operation

 10. Cycle-by-Cycle Over-Current Protection (OCP)

 11. Short-Circuit Protection (SCP) with Hiccup Mode

 12. Thermal Shutdown

 13. Available in a Small QFN-14 (4mmx4mmx1.6mm) Package

3. APPLICATIONS

   1. Optical Modules

   2. Industrial Products

   3. IoT Devices

   5. LDO Replacement

   6. Medical Devices

4. OPERATION

The MPM38111 is a dual-channel DC/DC module that includes a monolithic, step-down,switch-mode converter with built-in, internal power MOSFETs and inductors. Both channels have peak-current mode with internal compensation for faster transient response and cycle-by-cycle current limit.

The MPM38111 is optimized for low-voltage,space-constrained applications where efficiency and small size are critical. 

5. 180° Phase Shift 

By default, the MPM38111’s two channels operate at a 180° phase shift to reduce input current ripple (see Table 1). The smaller current ripple allows for use of a smaller input bypass capacitor. In continuous conduction mode (CCM), two internal clocks control the switching.

The high-side MOSFET (HS-FET) turns on at the corresponding clock’s rising edge.

The switching frequency drops below 1MHz with a fixed off time when operating at a low dropout voltage. Once the input voltage recovers to a high value, switching for PWM mode resumes normally and synchronizes with the master oscillator for phase-shifted operation.

6. Light-Load Operation

In light loads, the MPM38111 uses a proprietary control scheme to save power and improve efficiency . The MPM38111 turns off the low-side switch when the inductor current starts to reverse, and then works in discontinuous conduction mode (DCM) operation. When either channel enters DCM or low-dropout operation, it will not be controlled by the internal 1MHz oscillator.

7. TYPICAL APPLICATION

8. BLOCK DIAGRAM