Features: • Output Range 0.8V to VIN
0.8V Internal Reference
±1.5% Over Line Voltage and Temperature
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
Voltage-Mode PWM Control
•Fast Transient Response
High-Bandwidth Error Amplifier
Full 0% to 100% Duty Cycle
• Lossless, Programmable Over-current Protection
Uses Upper MOSFET's RDS(ON)
• Small Converter Size
300kHz Fixed Frequency Oscillator
Internal Soft-Start
8-Lead SOICApplication• Power Supplies for PC Subsystems and Peripherals
• MCH, GTL, and AGP Supplies
• Cable Modems, Set Top Boxes, and DSL Modems
• DSP, Memory
• Low-Voltage Distributed Power SuppliesPinout
Specifications
| FAN6520AIMX |
Lifetime Buy |
RoHS Compliant |
N/A |
SO-8 |
8 |
TAPE REEL |
|
Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 6520AIM Line 3: C |
| FAN6520AMX |
Full Production |
RoHS Compliant |
$0.393 |
SO-8 |
8 |
TAPE REEL |
|
Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: 6520AM Line 3: C |
* Fairchild 1,000 piece Budgetary Pricing
|
| ** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples |
Package marking information for product FAN6520A is available. Click here for more information . |
Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied.
| Parameter |
Min. |
Max. |
Units |
| VCC to GND |
|
6 |
V |
| VBOOT to GND |
|
15 |
V |
| HDRV (VBOOT VSW) |
|
|
V |
| LDRV |
-0.5 |
6 |
V |
| SW to PGND |
Continuous |
-0.5 |
6 |
V |
| Transient ( t < 50nsec, F < 500kHz) |
-3 |
7 |
V |
| All other pins |
|
5.5 |
V |
DescriptionThe FAN6520A simplifies implementing a complete control and protection scheme for a DC-DC stepdown converter. Designed to drive N-channel MOSFETs in a synchronous buck topology, the FAN6520A integrates the control, output adjustment, monitoring, and protection functions into a single 8-lead package.
The FAN6520A employs a single feedback loop and voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ?1.5% over-temperature and line-voltage variations. A fixed-frequency oscillator reduces design complexity, while balancing typical application cost. The error amplifier features a 15MHz gain-bandwidth product and an 8V/?s slew rate, which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.
The IC monitors the drop across the upper MOSFET and inhibits PWM operation appropriately to protect against over-current conditions. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.
The FAN6520A is rated for operation from 0? to +70?C, with the FAN6520AI rated from ?40? to +85?C.
FAN6520A Data Sheet
