Description The FAN6555 switching regulator is designed to convert voltage supplies ranging from 2.3V to 4V into a desired output voltage or termination voltage for DDR SDRAM memory. The FAN6555 can be implemented to produce regulated output voltages in two different modes. In the default mode, when the VREFpin is open, the FAN6555 output voltage is 50% of the voltage applied to VCCQ.

Features • Can source and sink up to 2A continous, 3A peak
• No heatsink required
• Integrated Power MOSFETs
• Generates termination voltages for DDR SDRAM
• VREF input available for external voltage divider
• Separate voltages for VCCQand PVDD
• Buffered VREF output
• VOUT of ±3% or less at 2A
• Minimum external components
• 16-pin SOIC package
• -40°C to +85°C operating temperature range
• Shutdown for standby or suspend mode operation
• Thermal Shutdown ≈130ºC

Manufacturer	onsemi
Product Category	AC DC Converters, Offline Switchers
Series	-
Product	Voltage Controllers
Packaging	Alternate Packaging
Unit-Weight	0.001058 oz
Mounting-Style	SMD/SMT
Package-Case	SOT-23-6
Operating-Temperature	-40°C ~ 105°C (TA)
Mounting-Type	Surface Mount
Supplier-Device-Package	SOT-23-6
Watt	40W
Number-of-Outputs	1 Output
Output-Isolation	Isolated
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Flyback
Voltage-Start-Up	16V
Voltage-Supply-Vcc-Vdd	7 V ~ 25 V
Duty-Cycle	75%
Frequency-Switching	65kHz
Fault-Protection	Current Limiting, Over Temperature, Over Voltage
Control-Features	-
Shutdown	No
Maximum Operating Temperature	+ 105 C
Operating temperature range	- 40 C
Operating-Supply-Voltage	20 V
Output-Voltage	13.5 V
Operating-Supply-Current	2 mA
Input-Voltage	16 V
Output-Current	400 mA
Switching-Frequency	65 kHz
Fall-Time	35 ns
Rise-Time	150 ns
Duty-Cycle-Max	85 %