ME3101
500mA Synchronous Step-Down DC/DC Converters ME3101 Series
General Description
ME3101 series is a group of synchronous
rectification type DC/DC converters with a built-in
0.6 P-channel driver transistor and 0.7 N-channel
switching transistor, designed to allow the use of
ceramic capacitors. The ICs enable a high efficiency,
stable power supply with an output current of 500mA
to be configured using only a coil and two capacitors
connected externally.
With the built-in oscillator, oscillation frequency is
1.2MHz.As for operation mode, the ME3101 series
can be manually switched with automatic PWM/PFM
switching control mode, allowing fast response, low
ripple and high efficiency over the full range of load
(from light load to high output current conditions).
During standby, all circuits are shutdown to
reduce current consumption to as low as 1.0 A or
less.
Features
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Synchronous Step-Down DC/DC
High Efficiency :93%(TYP)
Low Ripple Voltage :10mV
Output Current :500mA
Oscillation Frequency :1.2MHz
PWM/PFM Automatic Switching Control
Maximum Duty Ratio :100%
Ceramic Capacitor Compatible
Ultra Small Packages :SOT-23-5
Soft-start ciruit built-in
Typical Application
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Mobile phones (PDC, GSM, CDMA, IMT200 etc.)
Bluetooth equipment
PDA
Portable communication modem
Portable games
Cameras
Digital cameras
Cordless phones
Notebook computers
Selection Guide
Typical Application Circuit
V5.0
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