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PDF FAN2110 Data sheet ( Hoja de datos )
| Número de pieza | FAN2110 | |
| Descripción | Integrated Synchronous Buck Regulator | |
| Fabricantes | Fairchild Semiconductor | |
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August 2009
FAN2110 — TinyBuck™
3-24V Input, 10A, High-Efficiency, Integrated
Synchronous Buck Regulator
Features
Wide Input Voltage Range: 3V-24V
Wide Output Voltage Range: 0.8V to 80% VIN
10A Output Current
1% Reference Accuracy Over Temperature
Over 93% Peak Efficiency
Programmable Frequency Operation: 200KHz to
600KHz
Fully Synchronous Operation with Integrated
Schottky Diode on Low-Side MOSFET Boosts
Efficiency
Internal Bootstrap Diode
Power-Good Signal
Starts up on Pre-Bias Outputs
Accepts Ceramic Capacitors on Output
External Compensation for Flexible Design
Programmable Current Limit
Under-Voltage, Over-Voltage, and Thermal
Shutdown Protections
www.DataSheet4IUn.tceormnal Soft-Start
5x6mm, 25-Pin, 3-Pad MLP Package
Applications
Servers & Telecom
Graphics Cards & Displays
Computing Systems
Point-of-Load Regulation
Set-Top Boxes & Game Consoles
Description
The FAN2110 TinyBuck™ is a highly efficient, small
footprint, constant frequency, 10A integrated
synchronous Buck regulator.
The FAN2110 contains both synchronous MOSFETs
and a controller/driver with optimized interconnects in
one package, which enables designers to solve high-
current requirements in a small area with minimal
external components. Integration helps to minimize
critical inductances making component layout simpler
and more efficient compared to discrete solutions.
The FAN2110 provides for external loop compensation,
programmable switching frequency, and current limit.
These features allow design flexibility and optimization.
High frequency operation allows for all ceramic
solutions.
The summing current mode modulator uses lossless
current sensing for current feedback and over-current
protection. Voltage feedforward helps operation over a
wide input voltage range.
Fairchild’s advanced BiCMOS power process,
combined with low-RDS(ON) internal MOSFETs and a
thermally efficient MLP package, provide the ability to
dissipate high power in a small package.
Output over-voltage, under-voltage, and thermal
shutdown protections help protect the device from
damage during fault conditions. FAN2110 also prevents
pre-biased output discharge during startup in point-of-
load applications.
Related Application Notes
AN-8022 — TinyCalc™ Calculator
Ordering Information
Operating
Part Number Temperature Range
FAN2110MPX
FAN2110EMPX
-10°C to 85°C
-40°C to 85°C
Package
Molded Leadless Package (MLP) 5x6mm
Molded Leadless Package (MLP) 5x6mm
Eco
Status
Green
Green
Packing
Method
Tape and Reel
Tape and Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FAN2110 • Rev. 1.0.2
www.fairchildsemi.com
1 page  
Electrical Specifications
Electrical specifications are the result of using the circuit shown in Figure 1 with VIN=12V, unless otherwise noted.
Symbol
Parameter
Conditions
Power Supplies
ICC VCC Current
VUVLO VCC UVLO Threshold
SW=Open, VFB=0.7V, VCC=5V,
fSW=600KHz
Shutdown: EN=0, VCC=5V
Rising VCC
Hysteresis
Oscillator
fSW
tONmin
Frequency
Minimum On-Time(2)
RT=50KΩ to GND
RT=24KΩ to GND
VRAMP Ramp Amplitude, Peak-to-Peak
tOFFmin Minimum Off-Time(2)
Reference
16VIN, 1.8VOUT, RT=30KΩ,
RRAMP=200KΩ
VFB
Reference Voltage (see Figure 4 for FAN2110MPX, 25°C
Temperature Coefficient)
FAN2110EMPX, 25°C
Error Amplifier
G DC Gain(2)
GBW Gain Bandwidth Product(2)
VCOMP Output Voltage(2)
ISINK Output Current, Sourcing
ISOURCE Output Current, Sinking
www.DataSheeIt4BIUAS.com FB Bias Current
Protection and Shutdown
VCC=5V
VCC=5V, VCOMP=2.2V
VCC=5V, VCOMP=1.2V
VFB=0.8V, 25°C
ILIM
Current Limit (see Circuit
Description)(2)
RILIM=182 KΩ,, 25°C, fSW=500KHz,
VOUT=1.5V, RRAMP=243KΩ,
16 Consecutive Clock Cycles(3)
IILIM
TTSD
THYS
ILIM Current
Over-Temperature Shutdown(2)
Over-Temperature Hysteresis(2)
VOVP Over-Voltage Threshold
VUVSD Under-Voltage Shutdown
VFLT Fault Discharge Threshold
VFLT_HYS Fault Discharge Hysteresis
Soft-Start
VCC=5V, 25°C
Internal IC Temperature
2 Consecutive Clock Cycles(3)
16 Consecutive Clock Cycles(3)
Measured at FB Pin
Measured at FB Pin (VFB ~500mV)
tSS VOUT to Regulation (T0.8)
tEN Fault Enable/SSOK (T1.0)(2)
fSW=500KHz
Min. Typ. Max. Unit
8 12
7 10
4.1 4.3 4.5
300
mA
µA
V
mV
255 300 345
540 600 660
50 65
0.53
100 150
KHz
KHz
ns
V
ns
794 800 806
795 800 805
mV
mV
80
12
0.4
1.5
0.8
-850
85
15
2.2
1.2
-650
3.2
-450
dB
MHz
V
mA
mA
nA
12 14 16
A
-11 -10 -9 µA
+155
°C
+30 °C
110 115 121 %VOUT
68 73 78 %VOUT
250 mV
250 mV
5.3 ms
6.7 ms
Continued on the following page…
© 2008 Fairchild Semiconductor Corporation
FAN2110 • Rev. 1.0.2
5
www.fairchildsemi.com
5 Page 
Typical Performance Characteristics (Continued)
Typical operating characteristics using the circuit in Figure 10. VIN=12V, VCC=5V, TA=25°C unless otherwise specified.
VOUT
EN
PGOOD
VOUT
VSW
PGOOD
Figure 24. Startup, 10A Load
VOUT
EN
Figure 25. Startup with 1.0V Pre-Bias on VOUT
VOUT, 50mV/div
VSW, 10V/Div
PGOOD
www.DataSheet4U.com
Figure 26. Shutdown, 10A Resistive Load
Figure 27. VOUT Ripple and SW Voltage, 10A Load
VOUT, 200mV/div
IOUT, 5A/Div
IOUT, 5A/Div
Figure 28. Transient Response, 0-8A Load,
5A / µs Slew Rate
EN, 2V/Div
Figure 29. Restart on Short Circuit (Fault)
© 2008 Fairchild Semiconductor Corporation
FAN2110 • Rev. 1.0.2
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet FAN2110.PDF ] | |
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