FAN8060 Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – 1.2MHz, 1A Synchronous Step-Down DC/DC Regulator

February 2009
FAN8060
1.2MHz, 1A Synchronous Step-Down DC/DC Regulator
Features
ƒ Current Mode Control
ƒ Over 96% Efficient
ƒ Selectable Continuous Output Current: 500mA/1A
ƒ 2.5V to 5.5V Input Voltage Range
ƒ Output Voltage as Low as 1.2V
ƒ 1.2MHz Operating Frequency
ƒ Less than 1µA Shutdown Current
ƒ External Synchronization from 500kHz to 2MHz
ƒ 100% Duty Cycle
ƒ Synchronous Switching FET; no Schottky Diode
Required
ƒ Stable with Ceramic Capacitors
ƒ Light Load Mode with Pulse Skipping
ƒ External Compensation
ƒ External Soft-Start
ƒ Overload / Short-Circuit Protection
ƒ Under-Voltage Lockout
ƒ Thermal Shutdown
ƒ 10-Lead 3x3mm Green MLP Package
Applications
ƒ PDAs
ƒ GPS Devices
ƒ MP3 Players
ƒ Mini PCI
ƒ Digital Cameras
ƒ Peripheral Ports
ƒ DSP Core
ƒ USB Devices
ƒ PCMCIA
ƒ Cable Modem
ƒ Data Cards
Description
The FAN8060 is a highly efficient, monolithic, current-
mode, step-down synchronous regulator. It can provide
1A continuous current from 2.5V to 5.5V input voltage.
The output voltage can be adjusted from 1.2V up to the
input voltage with an external voltage divider.
External compensation and soft-start allow for design
optimization and flexibility. High-frequency operation
allows for all-ceramic solutions and small footprints. In
addition, a user-selectable current limit provides
protection against output overload and short circuit.
FAN8060 features pulse skipping to achieve higher
efficiency during light load operation. 100% duty cycle
capability enables power solutions to extend the drop
out voltage.
Provision for external synchronization allows users to
minimize input capacitors and manage EMI in solutions.
FAN8060 is available in a green, low profile, 10-Lead
3x3mm MLP package.
Application Diagram
© 2008 Fairchild Semiconductor Corporation
FAN8060 • Rev. 1.0.0
Figure 1. Typical Application Circuit
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