Document
FAN2013 2A Low-Voltage Current-Mode Synchronous PWM Buck Regulator
November 2006
FAN2013 2A 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 2A Output Current ■ Fixed-Frequency 1.3MHz PWM Operation ■ 100% Duty Cycle, Low-Dropout Operation ■ Soft-Start Function ■ Excellent Load Transient Response ■ Power-Good Flag ■ Over-Voltage, Under-Voltage Lockout, Short-Circuit,
Description
The FAN2013 is a high-efficiency, low-noise synchronous 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 of 0.8V to VIN by means of an external voltage divider. The FAN2013 is enabled when the input voltage on the VIN pin exceeds 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.
and Thermal Shutdown Protections
■ 3x3mm 6-lead MLP Package
Applications
■ Hard Disk Drive ■ Set-Top Box ■ Point-of-Load Power ■ Notebook Computer ■ Communications Equipment
Protection features include input under-voltage lockout, short-circuit protection, and thermal shutdown. Soft-start www.DataSheet4U.com limits in-rush current during start-up conditions. The device is available in a 3x3mm 6-lead MLP.
Typical Application
PG +5V VIN PVIN 10µF
6 5 4 1
FB PGND SW
P1 (AGND)
10K L1
2 3
R2
R1 VOUT 40µF
2.2µH
Figure 1. Typical Application
Ordering Information
Part Number
FAN2013MPX
Output Voltage
0.8V - VIN
Pb-Free
Yes
Package Type
MLP-6 3x3mm
Packing Method
Tape and Reel
© 2006 Fairchild Semiconductor Corporation FAN2013 Rev. 1.0.0
www.fairchildsemi.com
FAN2013 2A Low-Voltage Current-Mode Synchronous PWM Buck Regulator
Pin Assignment
Top View
FB PGND SW
1 2
6
PG VIN PVIN
P1 (AGND)
5
3
4
3x3mm 6-Lead MLP Figure 2. FAN2013 Pin Assignment
Pin Description
Pin #
P1 1 2 3 4 5 6
Name
AGND FB PGND SW PVIN VIN PG
Description
Analog Ground. P1 must be soldered to the PCB ground. Feedback Input. Adjustable voltage option; connect this pin to the resistor divider. Power Ground. This pin is connected to the internal MOSFET switches. This pin must be externally connected to AGND. Switching Node. This pin is connected to the internal MOSFET switches. Supply Voltage Input. This pin is connected to the internal MOSFET switches. Supply Voltage Input. Open Drain Power Good.
© 2006 Fairchild Semiconductor Corporation FAN2013 Rev. 1.0.0 2
www.fairchildsemi.com
FAN2013 2A Low-Voltage Current-Mode Synchronous PWM Buck Regulator
Absolute Maximum Ratings
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute maximum ratings apply individually only, not in combination. Unless otherwise specified, all other voltages are referenced to AGND.
Symbol
VIN θJC TL TSTG TJ Supply Voltage PVIN and any other pin
Parameter
Min.
-0.3 -0.3
(1)
Max.
6.2 VIN 8 260
Unit.
V V °C/W °C °C °C kV
Thermal Resistance-Junction to Tab, 3x3mm 6-lead MLP Lead Soldering Temperature (10 seconds) Storage Temperature Junction Temperature Electrostatic Discharge (ESD) Protection Level
(2)
-65 -40 HBM CDM 3.5 2
150 150
Notes: 1. Junction-to-ambient thermal resistance, θJA, is a strong function of PCB material, board thickness, thickness and number of copper planes, number of via used, diameter of via used, available copper surface, and attached heat sink characteristics. 2. Using Mil Std. 883E, method 3015.7 (Human Body Model) and EIA/JESD22C101-A (Charge Device Model).
Recommended Operating Conditions
Symbol
VIN VOUT IOUT L CIN COUT TA Supply Voltage Range Output Voltage Range, Adjustable Version Output Current Inductor(3) Input Capacitor(3) Output Capacitor(3) Operating Ambient Temperature Range 10 20 -40 2.2 20 40 +85
Parameter
Min.
4.5 0.8
Typ.
Max.
5.5 VIN 2.0
Unit
V V A μH μF μF °C
Notes: 3. Refer to the Applications Information section for further details.
© 2006 Fairchild Semiconductor Corporation FAN2013 Rev. 1.0.0 3
www.fairchildsemi.com
FAN2013 2A Low-Voltage Current-Mode Synchronous PWM Buck Regulator
Electrical Characteristics
VIN = 4.5V to 5.5V, VOUT = 1.2V, IOUT = 200mA, CIN = 10µF, COUT = 40µF, L = 2.2µH, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Parameter
Input Voltage Quiescent Current UVLO Threshold PMOS On Resistance NMO.