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Part Number: GM3326
Description: The GM3326 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers...
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GM3326
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DataSheet
General Description
GM3326 General Description
The GM3326 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in. A versatile, large output current, step-up/ down DC/DC converter can be realised using 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.
The GM3326 series 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 0.5A or less.
GM3326 Maximum Ratings
| PARAMETER | SYMBOL | RATINGS | UNITS |
| VDD Pin Voltage | VDD | -0.3 ~ 12 | V |
| VOUT Pin Voltage | VOUT | -0.3 ~ 12 | V |
| CE Pin Voltage | VCE | -0.3 ~ 12 | V |
| EXT/ Pin Voltage | VEXT/ | -0.3 ~ VDD +0.3 | V |
| EXT/ Pin Current | IEXT/ | ± 100 | mA |
| Power Dissipation | PD | 150 |
mW |
| Operating Ambient Temp. | TOPR | -40 to + 85 | °C |
| Storage Temp. | TSTG | -40 to +125 | °C |
GM3326 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 = 0.5A (max)
`Output Voltage Internal Set-Up
`SOT-25 Package
`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 = 0.5A (max)
`Output Voltage Internal Set-Up
`SOT-25 Package
GM3326 Typical Application
·Mobile phones
·PDAs
·Palmtop computers
·Portable audio equipment
·Various power supplies
·PDAs
·Palmtop computers
·Portable audio equipment
·Various power supplies
GM3326
PDF/DataSheet Download
- Datasheet: GM3326
- File Size: 110196 KB
- Manufacturer:
- Click here to Download
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