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ME2139FM5G

Description
Enable control, ultra-low power consumption, 3A DCDC boost switching power supply chip, 1M high frequency, soft start, built-in PWM/PFM low voltage operation: start-up guaranteed from 0.9 V
CategoryPower/power management    Switching power supply chip   
File Size651KB,12 Pages
ManufacturerMICRONE
Websitehttp://www.microne.com.cn
Nanjing Weimo Electronics Co., Ltd. was founded in 1999. It is a high-tech enterprise engaged in the research, development and sales of dedicated analog integrated circuit chip products. The products are used in the fields of information appliances, wireless communications, digital communications and network technology. The company is mainly engaged in the development and sales of power management products. The main products include LDO series, DC/DC series, LED DRIVER, AC/DC series, lithium battery management, voltage detection series, CHARGE PUMP, MOSFET series, etc. Provide high-quality and stable power solutions for the main chips and related devices in electronic equipment.
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ME2139FM5G Overview

Enable control, ultra-low power consumption, 3A DCDC boost switching power supply chip, 1M high frequency, soft start, built-in PWM/PFM low voltage operation: start-up guaranteed from 0.9 V

ME2139FM5G Preview

Download Datasheet
ME2139
ULTRA-SMALL PACKAGE
PWM/PFM
SWITCHING CONTROL
STEP-UP SWITCHING REGULATOR
General Description
The ME2139 series is a CMOS step-up
switching regulator which mainly consists of a
reference voltage source, an oscillation circuit,
an error amplifier, a phase compensation circuit,
a PWM/PFM switching control circuit. With an
external low-ON-resistance Nch Power MOS,
this product is applicable to applications requiring
high efficiency and high output current. The
ME2139 series switches its operation to the PFM
control circuit whose duty ratio is 15 % with to the
PWM/PFM switching control circuit under a light
load and to prevent decline in the efficiency by IC
operation current.
Features
Low voltage operation: Start-up is guaranteed from
0.9 V(IOUT =1 mA )
Duty ratio: Built-in PWM/PFM switching control
circuit 15 to 78 % .
oscillator frequency:1.0MHz
External parts: coil, diode, capacitor, and transistor
Output voltage range:<20V
Feedback voltage accuracy:±
2%
Soft start function: 2 ms
Applications
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
Package
● 5-pin SOT23-5
V05
www.microne.com.cn
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