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FAN2011 Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part No. FAN2011
Description  1.5A Low Voltage Current Mode Synchronous PWM Buck Regulator
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FAN2011 Datasheet(HTML) 1 Page - Fairchild Semiconductor

 
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FAN2011/FAN2012 Rev. 1.0.4
1
www.fairchildsemi.com
April 2006
©2006 Fairchild Semiconductor Corporation
FAN2011/FAN2012
1.5A Low Voltage Current Mode Synchronous PWM Buck
Regulator
Features
95% Efficiency, Synchronous Operation
Adjustable Output Voltage from 0.8V to VIN
4.5V to 5.5V Input Voltage Range
Up to 1.5A Output Current
Fixed Frequency 1.3 MHz PWM Operation
100% Duty Cycle Low Dropout Operation (LDO)
Soft Start
Excellent Load Transient Response
3x3mm 6-lead MLP Package
Applications
Hard Disk Drive
Set Top Box
Point of Load Power
Notebook Computers
Communications Equipment
Description
The FAN2011/FAN2012 is a high-efficiency, low-noise
synchronous Pulse Width Modulated (PWM) current
mode DC-DC converter, designed for low voltage appli-
cations. It provides up to 1.5A continuous load current
from the 4.5V to 5.5V input. The output voltage is adjust-
able over a wide range of 0.8V to VIN by means of an
external voltage divider.
The FAN2011 is always on, while the FAN2012 has an
“Enable Input,” and the device can be put in the shut-
down mode, in which the ground current falls below 1µA.
A current mode control loop with a fast transient
response ensures excellent line and load regulation. The
fixed 1.3MHz switching frequency enables the user to
choose a small, inexpensive external inductor and
capacitor. Filtering is also easily accomplished with very
small components.
Protection features include input under-voltage lockout,
short circuit protection and thermal shutdown. Soft-start
limits in-rush current during start-up conditions.
The device is available in a 3x3mm 6-lead MLP package,
making it possible to build a 1.5A complete DC-DC con-
verter in a tiny space on the PCB.
Ordering Information
Product Number
Output Voltage
Package Type
Ambient Operating
Temperature
Order Code
FAN2011
Adjustable
3x3mm 6-Lead MLP
0°C to 85°C
FAN2011MPX
FAN2012
Adjustable
3x3mm 6-Lead MLP
0°C to 85°C
FAN2012MPX
FAN2011I
Adjustable
3x3mm 6-Lead MLP
-40°C to 85°C
FAN2011EMPX
FAN2012I
Adjustable
3x3mm 6-Lead MLP
-40°C to 85°C
FAN2012EMPX


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