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Fairchild Semiconductor Electronic Components Datasheet

FAN8060 Datasheet

1A Synchronous Step-Down DC/DC Converter

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FAN8060 pdf
November 2013
FAN8060
1.2 MHz, 1 A Synchronous Step-Down DC/DC
Regulator
Features
Current Mode Control
Over 96% Efficient
Selectable Continuous Output Current: 500 mA/1 A
2.5 V to 5.5 V Input Voltage Range
Output Voltage as Low as 1.2 V
1.2 MHz Operating Frequency
Less than 1 µA Shutdown Current
External Synchronization from 500 kHz to 2 MHz
100% Duty Cycle
Synchronous Switching FET; no Schottky Diode
Required
Stable with Ceramic Capacitors
Light Load Mode with Pulse Skipping
External Compensation
External Soft-Start
Overload / Short-Circuit Protection
Under-Voltage Lockout
Thermal Shutdown
10-Lead 3x3 mm Green MLP Package
Applications
PDAs
GPS Devices
MP3 Players
Mini PCI
Digital Cameras
Peripheral Ports
DSP Core
USB Devices
PCMCIA
Cable Modem
Data Cards
Description
The FAN8060 is a highly efficient, monolithic, current-
mode, step-down synchronous regulator. It can provide
1 A continuous current from 2.5 V to 5.5 V input
voltage. The output voltage can be adjusted from 1.2 V
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
3x3 mm MLP package.
HI
LO
EN PVIN
SYNC
AVIN
SS FAN8060 SW
CSS
CA
COMP
RC
AGND
CC
FB
PGND
INPUT
2.5 to 5.5V
OUTPUT
LOUT 1.2V to 5.5V
R2 CIN COUT
R3
Figure 1. Typical Application Circuit
Ordering Information
Part Number
FAN8060EMPX
Operating
Temperature Range
-40 to +85°C
Package
10-Pin, 3x3 mm Molded Leadless
Package (MLP)
Packing Method
Tape & Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2013 Fairchild Semiconductor Corporation
FAN8060 • Rev. 1.0.1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN8060 Datasheet

1A Synchronous Step-Down DC/DC Converter

No Preview Available !

FAN8060 pdf
Pin Configuration
EN 1
AVIN 2
PVIN 3
SW 4
PGND 5
10 AGND
9 FB
8 COMP
7 SS
6 SYNC
Figure 2. Pin Configuration (Top View)
Note:
1. Connect exposed PAD to AGND
Pin Definitions
Pin Name
Function
1 EN Enable. Enables operation when pulled to logic HIGH.
2 AVIN Analog Input Voltage. All internal control circuits are connected to this supply.
3 PVIN Power Input Voltage. Power stage supply voltage.
4 SW Switching Node. The drains of both PMOS and NMOS.
5 PGND Power Ground. Power return and source of the power NMOS
Synchronization. Use this pin to synchronize the part to an external clock. This pin also
6
SYNC
controls current limit threshold. Tie to ground for 1.0 A or tie to VIN for 0.5 A continuous load
current. When an external clock is applied, the default current setting is 1 A. This pin has a
pull-down resistor of 450 K.
7 SS Soft-Start. A capacitor connected between this pin and AGND can set soft-start time.
8
COMP
Compensation. Error amplifier output. Connect the external compensation network between
this pin and AGND.
9 FB Output Voltage Feedback. Connect through a resistor divider to set the output voltage.
10 AGND Analog Ground. Ground return for all internal control circuits.
© 2013 Fairchild Semiconductor Corporation
FAN8060 • Rev. 1.0.1
2
www.fairchildsemi.com


Part Number FAN8060
Description 1A Synchronous Step-Down DC/DC Converter
Maker Fairchild Semiconductor
Total Page 13 Pages
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