Description
 GM3326 is step-up/down DC/DC converter controller ICs with fast, and low ON resistance drivers built-in.
A versatile step-up/ down DC/DC converter can be realised by using with large output current only 4 basic external components - transistors, coils, diodes, and capacitors.
Output voltage is selectable in 0.1V steps within a 2.4V ~ 6.0V ( ± 2.5% accuracy) range, and switching frequency is set at or 300KHz.
GM3326 switches from PWM to PFM control during light loads, and the series offers high efficiencies from light loads through to large output currents.
Soft-start time is internally set to 10 msec, which offers protection against rush currents when the power is switched on and also against voltage overshoot.
During shutdown (CE pin = L), consumption current can be reduced to as little as 0.5μA or less.

Features
* Input Voltage Range : 2.0V ~ 10V
* Output Voltage Range : 2.4V ~ 6.0V ( ± 2.5% accuracy) (selectable in 0.1V steps)
* Oscillation Frequency : 300KHz ( ± 15% accuracy)
* Output Current : more than 250mA (VIN=2.4V, VOUT=3.3V)
* Efficiency : 81% (typ) at 5.0V, 78% (typ) at 3.3V
* Stand-By : ISTB = 0.5μA (max)
* Output Voltage Internal Set-Up
* SOT-25 Package

Application
* Mobile phones
* PDAs
* Palmtop computers
* Portable audio equipment
* Various power supplies

GM3326-2.5ST25R
GM3326-2.8ST25R
GM3326-3.0ST25R

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Description
The GM66300 series is 3.0A low-dropout linear voltage regulators that provide a low-voltage, and high-current output with a minimum of external components.
The GM66300 series offers extremely low dropout (typically 400mV at 3.0A) and low ground current (typically 36mA at 3.0A).
The GM66300 series is ideal for PC add-in cards that need to convert from standard 3.0V to 2.5V and 2.5V to 1.8, down to new, lower core voltages. A guaranteed maximum
dropout voltage of 500mV over all operating conditions allows the GM66300 series to provide 2.5V from a supply as low as 3V or 1.8V . The GM66300 series also has fast transient response, for heavy switching applications. The device requires only 47μF of output capacitance to maintain stability and achieve fast transient response.
The GM66300 series is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversed-lead insertion protection, and reversed-leakage
protection.
The GM66301 series offers a TTL-logic-compatible enable pin, and an error flag that indicates undervoltage and overcurrent conditions. Offered in a fixed voltages, 1.8V and 2.5V, the GM66300 series comes in the TO-220 and TO-263 packages, and is an ideal upgrade to older, NPNbased linear voltage regulators. The GM66030 is adjustable version.

Features
3.0A minimum guaranteed output current
500mV dropout voltage
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V conversion
1% initial accuracy
Low ground current
Current limiting and Thermal shutdown
Reversed-battery protection
Reversed-leakage protection
Fast transient response
TO-220 and TO-263 packages
TTL/CMOS compatible enable pin (GM66301 only)
Error flag output (GM66301 only)
Adjustable version (GM66302 only)

Application
LDO linear regulator for PC add-in cards
High-efficiency linear power supplies SMPS post regulator
Multimedia and PC processor supplies Low-voltage microcontrollers
Strong ARMTM processor supply

GM66300-1.8TA3T
GM66300-1.8TA3R
GM66300-1.8TB3T
GM66301-1.8TA5T
GM66302TA5T


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Description
 GM3255 products are 280 kHz switching regulators with a high efficiency, 1.5 A integrated switch. These parts operate over a wide input voltage range, from 2.7 V to 30 V.
The flexibility of the design allows the chips to operate in most power supply configurations, including boost, flyback, forward, inverting, and SEPIC. The ICs utilize current mode architecture, which allows excellent load and line regulation, as well as a practical means for limiting current.

 Combining high frequency operation with a highly integrated regulator circuit results in an extremely compact power supply solution. The circuit design includes provisions for features such as frequency synchronization, shutdown, and feedback controls for either positive or negative voltage regulation.

Features
* Integrated Power Switch: 1.5 A Guaranteed
* Input Voltage Range: 2.7 V to 30 V
* High Frequency Allows for Small Components
* Minimum External Components
* Easy External Synchronization
* Built in Overcurrent Protection
* Frequency Foldback Reduces Component
* Stress During an Overcurrent Condition
* Thermal Shutdown with Hysteresis
* Regulates Either Positive or Negative Output Voltages
* Shut Down Current: 50 μA Maximum
* Wide Temperature Range Commercial
* Commercial Grade : 0 to 70°C (GM3255)

Application
* Boost Regulators
* CCFL Backlight Driver
* Laptop Computer Supplies
* Multiple Output Flyback Supplies
* Inverting Supplies
* TFT LCD Bias Supplies

GM3255S8T
GM3255NS8T
GM3255S8R
GM3255NS8R

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