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The LM3500 is a fixed-frequency step-up DC/DC converter that is ideal for driving white LEDs for display backlighting and other lighting functions. With fully intergrated synchronous switching (no external schottky diode required) and a low feedback voltage (500mV), power efficiency of the LM3500 circuit has been optimized for lighting applications in wirele.
1
•2 Synchronous Rectification, High Efficiency and no External Schottky Diode Required
• Uses Small Surface Mount Components
• Can Drive 2-5 White LEDs in Series
– (May Function With More Low-VF LEDs)
• 2.7V to 7V Input Range
• Internal Output Over-Voltage Protection (OVP)
Circuitry, with no External Zener Diode Required
– LM3500-16: 15.5V OVP; LM3500-21: 20.5V
OVP.
• True Shutdown Isolation
• Input Undervoltage Lockout
• Requires Only Small Ceramic Capacitors at the
Input and Output
• Thermal Shutdown
• 0.1µA Shutdown Current
• Small 8-Bump Thin DSBGA Package
APPLICATIONS
• LCD Bias Supplie.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | LM350 |
ON Semiconductor |
THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR |
|
| 2 | LM350 |
Fairchild Semiconductor |
3-Terminal 3A Positive Adjustable Voltage Regulator |
|
| 3 | LM350 |
STMicroelectronics |
Three-terminal 3 A adjustable voltage regulators |
|
| 4 | LM350 |
National Semiconductor |
Dual Peripheral Drivers |
|
| 5 | LM350 |
Texas Instruments |
3-Amp Adjustable Regulator |
|
| 6 | LM350 |
Linear Technology |
3 Amp Positive Adjustable Regulator |
|
| 7 | LM350-N |
Texas Instruments |
3-Amp Adjustable Regulator |
|
| 8 | LM3501 |
Texas Instruments |
Synchronous Step-up DC/DC Converter |
|
| 9 | LM3501 |
National Semiconductor |
Synchronous Step-up DC/DC Converter |
|
| 10 | LM3502 |
National Semiconductor |
Step-Up Converter |
|
| 11 | LM3502 |
Texas Instruments |
Step-Up Converter |
|
| 12 | LM3503 |
National Semiconductor |
Dual-Display Constant Current LED Driver |
|