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FAN53611UC123X View Datasheet(PDF) -

Part Name
Description
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FAN53611UC123X
 
FAN53611UC123X Datasheet PDF : 0 Pages
October 2012
FAN53601 / FAN53611
6 MHz 600 mA / 1 A Synchronous Buck Regulator
Features
600 mA or 1 A Output Current Capability
24 µA Typical Quiescent Current
6 MHz Fixed-Frequency Operation
Best-in-Class Load Transient Response
Best-in-Class Efficiency
2.3 V to 5.5 V Input Voltage Range
0.8 V to 2 V Fixed Output Voltage
Low Ripple Light-Load PFM Mode
Forced PWM and External Clock Synchronization
Internal Soft-Start
Input Under-Voltage Lockout (UVLO)
Thermal Shutdown and Overload Protection
Optional Output Discharge
6-Bump WLCSP, 0.4 mm Pitch
Applications
6-Bump WLCSP, 0.4mm Pitch
3G, 4G, WiFi®, WiMAX™, and WiBro® Data Cards
Tablets
DSC, DVC
Netbooks®, Ultra-Mobile PCs
All trademarks are the property of their respective owners.
Description
The FAN53601/11 is a 6 MHz, step-down switching voltage
regulator, available in 600 mA or 1 A options, that delivers a
fixed output from an input voltage supply of 2.3 V to 5.5 V.
Using a proprietary architecture with synchronous
rectification, the FAN53601/11 is capable of delivering a
peak efficiency of 92%, while maintaining efficiency over
80% at load currents as low as 1 mA.
The regulator operates at a nominal fixed frequency of
6 MHz, which reduces the value of the external components
to as low as 470 nH for the output inductor and 4.7 µF for the
output capacitor. In addition, the Pulse Width Modulation
(PWM) modulator can be synchronized to an external
frequency source.
At moderate and light loads, Pulse Frequency Modulation
(PFM) is used to operate the device in Power-Save Mode
with a typical quiescent current of 24 µA. Even with such a
low quiescent current, the part exhibits excellent transient
response during large load swings. At higher loads, the
system automatically switches to fixed-frequency control,
operating at 6 MHz. In Shutdown Mode, the supply current
drops below 1 µA, reducing power consumption. For
applications that require minimum ripple or fixed frequency,
PFM Mode can be disabled using the MODE pin.
The FAN53601/11 is available in 6-bump, 0.4 mm pitch,
Wafer-Level Chip-Scale Package (WLCSP).
MODE A1 A2 VIN
L1 SW B1
470nH
B2 EN
FB C1 C2 GND
F
COUT
CIN
2.2 F
Figure 1. Typical Application
Ordering Information
Part Number
Output Max. Output
Active
Voltage(1)
Current
Discharge(2)
Package
Temperature
Range
Packing
FAN53611AUC11X
FAN53611UC123X
FAN53601UC182X
1.100 V
1.233 V
1.820 V
1A
1A
600 mA
Yes
No
WLCSP-6,
0.4 mm Pitch
–40 to +85°C
Tape and
Reel
No
Notes:
1. Other voltage options available on request. Contact a Fairchild representative.
2. All voltage and output current options are available with or without active discharge. Contact a Fairchild representative.
© 2010 Fairchild Semiconductor Corporation
FAN53601 / FAN53611 • Rev. 1.0.1
www.fairchildsemi.com
 

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