FAN2013 — 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator
January 2008
FAN2013 — 2A Low-Voltage, Current-Mode
Synchronous PWM Buck Regulator
Features
95% Efficiency, Synchronous Operation
Adjustable Output Voltage from 0.8V to V
IN
-1
4.5V to 5.5V Input Voltage Range
Up to 2A Output Current
Fixed-Frequency 1.3 MHz PWM Operation
100% Duty Cycle Low-Dropout Operation (LDO)
Soft-Start Function
Excellent Load Transient Response
Power-Good Flag
Over-Voltage, Under-Voltage Lockout, Short-
Circuit, and Thermal Shutdown Protections
3x3mm 6-lead MLP Package
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
V
IN
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.
Applications
Hard Disk Drive
Set-Top Box
Point-of-Load Power
Notebook Computer
Communications Equipment
Typical Application
V
IN
PG
R3
10K
6
5
PG
V
IN
P1
FB
PGND
1
2
R2
10K
R1
4
C
IN
10µF
PV
IN
U1
SW
FAN2013
3
L
2.2µH
C
OUT
40 - 60µF
V
OUT
Figure 1.
Typical Application
Ordering Information
Part Number
FAN2013MPX
Output Voltage
0.8V to V
IN
-1V
Package
3x3mm 6-Lead Molded Leadless Package (MLP)
Packing Method
Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Fairchild Semiconductor Corporation
FAN2013 Rev. 1.0.3
www.fairchildsemi.com
FAN2013 — 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator
Pin Assignments
FB
PGND
SW
1
2
6
PG
V
IN
PV
IN
P1
(AGND)
5
3
4
Figure 2.
Pin Assignments (Top View)
Pin Definitions
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. 1.0.3
www.fairchildsemi.com
2
FAN2013 — 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device
reliability. The absolute maximum ratings are stress ratings only.
Symbol
V
IN
θ
JC
T
L
T
STG
T
J
ESD
Supply Voltage
Parameter
Input Voltage on PVIN and Any Other Pin
Thermal Resistance, Junction-to-Tab
Storage Temperature
Junction Temperature
Electrostatic Discharge Protection Level
(2)
(1)
Min.
-0.3
-0.3
Max.
6.2
V
IN
8
260
Unit
V
V
°C/W
°C
°C
°C
kV
Lead Soldering Temperature (10 Seconds)
-65
-40
HBM
CDM
3.5
2
150
150
Notes:
1. Junction-to-ambient thermal resistance,
θ
JA
, 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 (Charged Device Model).
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbols
V
IN
V
OUT
I
OUT
L
C
IN
C
OUT
T
A
Parameter
Supply Voltage Range
Output Voltage Range, Adjustable Version
Output Current
Inductor
(3)
(3)
(3)
Min.
4.5
0.8
Typ.
Max.
5.5
V
IN
-1
2.0
Unit
V
V
A
µH
µF
µF
2.2
10
20
-40
20
40
+85
Input Capacitor
Output Capacitor
Operating Ambient Temperature Range
°C
Note:
3. Refer to the
Applications
section for details.
© 2006 Fairchild Semiconductor Corporation
FAN2013 Rev. 1.0.3
www.fairchildsemi.com
3
FAN2013 — 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator
Electrical Characteristics
V
IN
= 4.5V to 5.5V, V
OUT
= 1.2V, I
OUT
= 200mA, C
IN
= 10µF, C
OUT
= 40µF, L = 2.2µH, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
IN
I
Q
V
UVLO
R
ON_PMOS
R
ON_NMOS
I
LIMIT
T
OVP
f
SW
R
LINE
R
LOAD
V
OUT
Parameter
Input Voltage
Quiescent Current
UVLO Threshold
PMOS On Resistance
NMOS On Resistance
P-Channel Current Limit
Over-Temperature Protection
Switching Frequency
Line Regulation
Load Regulation
Output Voltage During Load
(4)
Transition
Reverse Leakage Current
into Pin SW
Reference Voltage
I
OUT
= 0mA
V
IN
Rising
Hysteresis
Conditions
Min.
4.5
Typ.
10
Max.
5.5
16
4.0
Units
V
mA
V
mV
MΩ
mΩ
3.4
3.7
150
90
90
V
IN
= V
GS
= 5V
V
IN
= V
GS
= 5V
4.5V < V
IN
< 5.5V
Rising Temperature
Hysteresis
1000
V
IN
= 4.5 to 5.5V, I
OUT
= 100mA
0mA
≤
I
OUT
≤
2000mA
I
OUT
from 1500mA to 100mA,
C
OUT
= 60µF
I
OUT
from 100mA to 1500mA,
C
OUT
= 60µF
V
IN
= Open, EN = GND, V
SW
= 5.5V
-5
2.8
3.5
150
20
1300
0.16
0.2
4.2
A
°C
°C
1600
0.6
5
kHz
%/V
%
%
%
I
LEAK
V
REF
0.1
0.8
1.0
µA
V
V
OUT
Output Voltage Accuracy
V
IN
= 4.5 to 5.5V, 0mA
≤
I
OUT
≤
2000mA, T
A
= 0°C to +85°C
V
IN
= 4.5 to 5.5V, 0mA
≤
I
OUT
≤
2000mA, T
A
= -40°C to +85°C
FB Voltage Rising
Hysteresis
I
sink
=6mA, Open-Drain Output
FB Voltage Rising
Hysteresis
-2
-3
0.85 xV
OUT
2
100
2
3
%
%
%
V
µs
V
PG
t
PG
V
PG_LOW
V
OVP
Power Good Output
Threshold and Hysteresis
Power Good Output Delay
Power Good Voltage Low
Over-Voltage Protection
Threshold and Hysteresis
0.4
1.07 xV
OUT
2
V
V
%
Notes:
4. Please refer to the load transient response test waveform shown in Figure 3.
I
LOAD
(mA)
1500
tr = 100ns
ss
tf = 100ns
100
0
Figure 3.
ss
0.6
ss
ss
4.6
Time (ms)
Load Transient Response Test Waveform
© 2006 Fairchild Semiconductor Corporation
FAN2013 Rev. 1.0.3
www.fairchildsemi.com
4
FAN2013 — 2A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator
Typical Performance Characteristics
T
A
= 25°C, C
IN
= 10µF, C
OUT
= 40µF, L = 2.2µH, V
IN
= 5V, V
OUT
= 1.2V, unless otherwise noted.
Figure 4.
Start-up with 100mA Resistive Load
Figure 5.
Start-up with 2A Resistive Load
Figure 6. Load Transient Response 1.5A to 100mA
Figure 7. Load Transient Response 100mA to
1.5A
Figure 8.
Output Voltage Regulation
Figure 9.
Power Efficiency
www.fairchildsemi.com
© 2006 Fairchild Semiconductor Corporation
FAN2013 Rev. 1.0.3
5
stm32/stm8
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