www.fairchildsemi.com
FAN1537
Dual 1A Adjustable/Fixed Low Dropout Linear Regulators
Features
• • • • • • Low dropout v...
www.fairchildsemi.com
FAN1537
Dual 1A Adjustable/Fixed Low Dropout Linear
Regulators
Features
Low dropout voltage Load regulation: 0.05% typical On-chip thermal limiting SO-8 and 5-lead SPAK and TO-252 DPAK packages Fixed 3.3V, and adjustable or 2.5V or 1.8V fixed Stable with low ESR output capacitors
Description
The FAN1537 provides 2 output voltages: 3.3V, and either adjustable or 2.5V or 1.8V fixed with 1.0A each output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. Current limit features protect the outputs against short circuit currents. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. The FAN1537 series
regulators are available in SO-8 and 5-lead SPAK and TO-252 DPAK power packages.
Applications
Hard Disk Drives, CD-ROMs, DVDs High efficiency linear
regulators Post
regulators for switching supplies ADSL and Cable Modems 5V to 3.3V and 2.5V linear
regulators Motherboard with multiple supplies
Typical Applications
FAN1537A V1 VIN = 5V 22µF + VIN NC GND V2 + 22µF + 22µF 2.5V at 1.0A 3.3V at 1.0A
FAN1537B V1 VIN = 5V 22µF + VIN GND V2 + FB R1 54.9Ω R2 124Ω 22µF + 3.3V at 1.0A 1.8V at 1.0A 22µF
V2 = VREF (1 + R1/R2)
REV. 1.1.1 3/20/02
FAN1537
PRODUCT SPECIFICATION
Pin Assignments
FAN1537PA FAN1537PC FRONT VIEW 8 7 6 5 GND GND GND GND 1 2 3 4 5 1 2 3 4 5...