FAN2013_08 Datasheet, PDF (1/9 Pages) Fairchild Semiconductor – 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator

January 2008
FAN2013 — 2A Low-Voltage, Current-Mode
Synchronous PWM Buck Regulator
Features
ƒ 95% Efficiency, Synchronous Operation
ƒ Adjustable Output Voltage from 0.8V to VIN-1
ƒ 4.5V to 5.5V Input Voltage Range
ƒ Up to 2A Output Current
ƒ Fixed-Frequency 1.3 MHz PWM Operation
ƒ 100% Duty Cycle Low-Dropout Operation (LDO)
ƒ Soft-Start Function
ƒ Excellent Load Transient Response
ƒ Power-Good Flag
ƒ Over-Voltage, Under-Voltage Lockout, Short-
Circuit, and Thermal Shutdown Protections
ƒ 3x3mm 6-lead MLP Package
Applications
ƒ Hard Disk Drive
ƒ Set-Top Box
ƒ Point-of-Load Power
ƒ Notebook Computer
ƒ Communications Equipment
Description
The FAN2013 is a high-efficiency, low-noise,
synchronous Pulse Width Modulated (PWM) current-
mode DC-DC converter designed for low-voltage
applications. It provides up to 2A continuous-load
current from the 4.5V to 5.5V input. The output voltage
is adjustable over a wide range by means of an external
voltage divider.
The FAN2013 is enabled when the input voltage on the
VIN pin exceed the UVLO threshold.
A current-mode control loop with a fast transient
response ensures excellent line and load regulation.
The fixed 1.3MHz switching frequency enables
designers to choose a small, inexpensive external
inductor and capacitor. Filtering can be accomplished
with small components, reducing space and cost.
Protection features include input under-voltage lockout,
short-circuit protection, and thermal shutdown. Soft-
start limits inrush current during start-up conditions.
The device is available in a 3x3mm 6-lead MLP.
Typical Application
VIN
PG
R3
10K
CIN
10µF
6
PG
5
VIN
4
PVIN
FB ¹
R2
2
10K
P1
PGND
R1
SW ³
U1
FAN2013
L
2.2µH
COUT
40 - 60µF
VOUT
Figure 1. Typical Application
Ordering Information
Part Number Output Voltage
Package
FAN2013MPX 0.8V to VIN-1V
3x3mm 6-Lead Molded Leadless Package (MLP)
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FAN2013 Rev. 1.0.3
Packing Method
Tape and Reel
www.fairchildsemi.com