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FAN5358S718X Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # FAN5358S718X
Description  2MHz, 500mA, SC70 Synchronous Buck Regulator
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5358S718X Datasheet(HTML) 1 Page - Fairchild Semiconductor

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September 2010
© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5358 • Rev. 1.0.2
FAN5358
2MHz, 500mA, SC70 Synchronous Buck Regulator
Features
2MHz Nominal-Frequency Operation
25µA Typical Quiescent Current
500mA Output Current Capability
2.7V to 5.5V Input Voltage Range
1.0 to 1.8V Fixed Output Voltages
Low Ripple, Light-Load PFM Mode
Internal Soft-Start
Input Under-Voltage Lockout (UVLO)
Thermal Shutdown and Overload Protection
6-lead 2 x 2.2mm SC70
Applications
Cell Phones, Smart Phones
3G, 4G, WiFi
®, WiMAX™, and WiBro® Data Cards
Netbooks
®, Ultra-Mobile PCs
Description
The FAN5358 is a step-down switching voltage regulator that
delivers a fixed output from an input voltage supply of 2.7V to
5.5V. Using a proprietary architecture with synchronous
rectification, the device is capable of delivering 500mA and
maintaining a very high efficiency of over 80% at load currents
as low as 1mA. The regulator operates at a nominal frequency
of 2MHz, which reduces the value of the external components
to as low as 2.2
μH for the output inductor and 4.7µF for the
output capacitor.
At moderate and light loads, pulse frequency modulation is
used to operate the device in power-save mode with a typical
quiescent current of 25µA. Even with such a low quiescent
current, the part exhibits excellent transient response during
large load swings. In shutdown mode, the supply current
drops below 1µA, reducing power consumption.
FAN5358 is available in a 6-lead SC70 package.
Typical Application
SW
EN
L1
C
IN
VOUT
C
OUT
VIN
U1
1
2
3
6
5
4
GND
GND
Figure 1. FAN5358 Typical Application
Table 1. External Components for Figure 1
U1
fSW
L1
CIN
COUT
FAN5358
2MHz
2.2
μH
2.2
μF
4.7
μF
Trademarks are the property of their respective owners.


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