FAN2106_08

Manufacturer Part NumberFAN2106_08
Description
ManufacturerFAIRCHILD [Fairchild Semiconductor]
FAN2106_08 datasheet
 
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FAN2106 — TinyBuck™
6A, 24V Input, Integrated Synchronous Buck Regulator
Features
6A Output Current
Over 95% Efficiency
Fully Synchronous Operation with Integrated
Schottky Diode on Low-side MOSFET Boosts
Efficiency
Programmable Frequency Operation: 200KHz to
600KHz
Power-good Signal
Accepts Ceramic Capacitors on Output
External Compensation for Flexible Design
Wide Input Range: 3V to 24V
Output Voltage Range: 0.8V to 90% V
Input Under-voltage Lockout
Programmable Current Limit
Under-voltage, Over-voltage, and Thermal
Protections
5x6mm, 25-pin, 3-pad MLP
Applications
Graphics Cards
Battery-powered Equipment
Set-top Boxes
Point-of-load Regulation
Servers
Ordering Information
Operating
Part Number
Temperature
Range
FAN2106MPX
-10°C to 85°C
FAN2106EMPX
-40°C to 85°C
For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2006 Fairchild Semiconductor Corporation
FAN2106 Rev. 1.0.8
Description
The FAN2106 TinyBuck™ is an easy-to-use, cost and
space-efficient, 6A synchronous buck solution. It
enables designers to solve high current requirements in
a small area with minimal external components.
External
compensation,
frequency, and current limit features allow for design
optimization and flexibility.
The summing current mode modulator uses lossless
current sensing for current feedback and over-current,
and includes voltage feedforward.
Fairchild’s advanced BiCMOS power process combined
with low-R
DS(ON)
efficient MLP package provide the ability to dissipate
high power in a small package.
IN
Output over voltage, under voltage, and thermal
shutdown protections help protect the device from
damage during fault conditions.
Related Application Notes
AN-6033 — FAN2106 Design Guide
Package
Molded Leadless Package (MLP) 5x6mm
Molded Leadless Package (MLP) 5x6mm
May 2008
programmable
switching
internal MOSFETs
and a thermally
Eco Status Packing Method
Green
Tape and Reel
Green
Tape and Reel
www.fairchildsemi.com

FAN2106_08 Summary of contents

  • Page 1

    FAN2106 — TinyBuck™ 6A, 24V Input, Integrated Synchronous Buck Regulator Features 6A Output Current Over 95% Efficiency Fully Synchronous Operation with Integrated Schottky Diode on Low-side MOSFET Boosts Efficiency Programmable Frequency Operation: 200KHz to 600KHz Power-good Signal Accepts Ceramic Capacitors ...

  • Page 2

    Typical Application Diagram Block Diagram © 2006 Fairchild Semiconductor Corporation FAN2106 Rev. 1.0.8 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...

  • Page 3

    Pin Configuration Figure 3. MLP 5x6mm Pin Configuration (Bottom View) Pin Definitions Pin # Name Description P1, 6-12 SW Switching Node. P2, 2-5 VIN Power Input Voltage. Connect to the main input power source. P3, 21-23 PGND Power Ground. Power ...

  • Page 4

    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 ...

  • Page 5

    Electrical Specifications Recommended operating conditions are the result of using the circuit shown in Figure 1 unless otherwise noted. Parameter Power Supplies V Current CC V UVLO Threshold CC Oscillator Frequency (2) Minimum On-Time Ramp Amplitude, pk–pk (2) Minimum Off-Time ...

  • Page 6

    Electrical Specifications Recommended operating conditions are the result of using the circuit shown in Figure 1 unless otherwise noted. Parameter Control Functions EN Threshold, Rising EN Hysteresis EN Pull-Up Resistance EN Discharge Current FB OK Drive Resistance PGOOD Threshold (Compared ...

  • Page 7

    Typical Characteristics 1.010 1.005 1.000 0.995 0.990 -50 0 Temperature ( Figure 4. Reference Voltage (V Normalized 1500 1200 900 600 300 Figure 6. Frequency vs. R 1.60 1.40 1.20 1.00 0.80 0.60 -50 ...

  • Page 8

    Application Circuit Typical Performance Characteristics Typical operating characteristics using the circuit shown in Figure 10. V 100 12V Load (A) Figure 11. 1.8V Efficiency Over V OUT 100 ...

  • Page 9

    Typical Performance Characteristics Typical operating characteristics using the circuit shown in Figure 10. V Figure 15. SW and V OUT Figure 17. Transient Response, 2-6A Load EN Figure 19. Start-Up, 3A Load © 2006 Fairchild Semiconductor Corporation FAN2106 Rev. 1.0.8 ...

  • Page 10

    Circuit Description Application Note AN-6033 — FAN2106 Design Guide includes a spreadsheet design aid to calculate external component values and verify loop stability given the following inputs: Output voltage Input voltage range Maximum output load current Maximum load transient current ...

  • Page 11

    Calculating the Inductor Value Typically the inductor is set for a ripple current (ΔI 10% to 35% of the maximum DC load. Regulators requiring fast transient response use a value on the high side of this range, while regulators that ...

  • Page 12

    A shorted high-side MOSFET condition is detected when SW voltage exceeds ~0.7V while the low-side MOSFET is fully enhanced. The fault latch is set immediately upon detection. The two fault protection circuits above are active all the time, including during ...

  • Page 13

    Physical Dimensions 2X TOP VIEW SIDE VIEW SEATING PLANE BOTTOM VIEW Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing ...

  • Page 14

    Fairchild Semiconductor Corporation FAN2106 Rev. 1.0.8 14 www.fairchildsemi.com ...