IC BUCK SYNC ADJ 3A 25MLP

FAN2103EMPX

Manufacturer Part NumberFAN2103EMPX
DescriptionIC BUCK SYNC ADJ 3A 25MLP
ManufacturerFairchild Semiconductor
SeriesTinyBuck™
TypeStep-Down (Buck)
FAN2103EMPX datasheet
 

Specifications of FAN2103EMPX

Internal Switch(s)YesSynchronous RectifierYes
Number Of Outputs1Voltage - Output3 ~ 21 V
Current - Output3AFrequency - Switching200kHz ~ 600kHz
Voltage - Input3 ~ 24 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case25-MLP
Power - Output2.8WMounting StyleSMD/SMT
Efficiency95 %Input / Supply Voltage (max)24 V
Input / Supply Voltage (min)3 VMaximum Operating Temperature+ 85 C
Minimum Operating Temperature- 40 COperating Temperature Range- 40 C to + 85 C
Output Current3 AOutput Power2.8 W
Output Voltage3.2 VSupply Current8 mA
Switching Frequency600 KHzFor Use WithFEB207 - BOARD EVAL FOR FAN2103
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesFAN2103EMPXTR
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FAN2103 — TinyBuck™
3A, 24V Input, Integrated Synchronous Buck Regulator
Features
3A 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 Over-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
FAN2103MPX
-10°C to 85°C
FAN2103EMPX
-40°C to 85°C
For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2007 Fairchild Semiconductor Corporation
FAN2103 • Rev. 1.0.6
Description
The FAN2103 TinyBuck™ is an easy-to-use, cost- and
space-efficient, 3A 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
combined with low R
thermally efficient MLP package provide the ability to
dissipate high power in a small package.
IN
Output
over-voltage,
shutdown protections plus power-good, help protect the
devices from damage during fault conditions.
Related Application Notes
AN-5067 – PCB Land Pattern Design and Surface
Mount Guidelines for MLP Packages
Package
25-Pin Molded Leadless Package
(MLP) 5x6mm
25-Pin Molded Leadless Package
(MLP) 5x6mm
October 2008
programmable
switching
BiCMOS
power
process,
internal MOSFETs and a
DS(ON)
under-voltage,
and
thermal
Packing
Eco Status
Method
Green
Tape and Reel
Green
Tape and Reel
www.fairchildsemi.com

FAN2103EMPX Summary of contents

  • Page 1

    ... Ordering Information Operating Part Number Temperature Range FAN2103MPX -10°C to 85°C FAN2103EMPX -40°C to 85°C For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Description The FAN2103 TinyBuck™ easy-to-use, cost- and space-efficient, 3A synchronous buck solution ...

  • Page 2

    ... Typical Application Diagram Block Diagram © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...

  • Page 3

    ... No Connect. This pin is not used. Ramp Amplitude. A resistor (R 25 RAMP amplitude and provides voltage feedforward functionality. © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 BOOT ) from this pin to AGND can be used to program the current- ILIM ) from this pin to AGND sets the PWM switching ...

  • Page 4

    ... Power Dissipation Note: 1. Typical thermal resistance when mounted on a four-layer, two-ounce PCB, as shown in Figure 25. Actual results are dependent on mounting method and surface related to the design. © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Conditions Conditions VCC to AGND VIN to PGND FAN2103M ...

  • Page 5

    ... Over-Voltage Threshold Under-Voltage Shutdown Fault Discharge Threshold Fault Discharge Hysteresis Soft-Start V to Regulation (T0.8) OUT Fault Enable/SSOK (T1.0) Note: 2. Specifications guaranteed by design and characterization; not production tested. © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Conditions SW = Open 0.7V 5V 600KHz SW Shutdown ...

  • Page 6

    ... 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 REF PGOOD Output Low © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 (Continued) Conditions Auto-restart Mode FB < V REF FB > V REF I < 2mA OUT 6 Min ...

  • Page 7

    ... Figure 6. Frequency vs. R 1.60 1.40 1.20 1.00 Q2 ~0.35 %/ 0.80 0.60 -50 0 Temperature ( Figure 8. R vs. Temperature, Normalized © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 1.20 1.10 1.00 0.90 0.80 50 100 150 - vs. Temperature, Figure 5. Reference Bias Current (I FB 1.02 1.01 1.00 ...

  • Page 8

    ... Efficiency Over V OUT Regulation Characteristic 1.828 1.826 1.824 1.822 Vo8V (V) 1.820 Vo12V (V) Vo18V (V) 1.818 0.00 0.50 1.00 1.50 Load Current (A) Figure 13. 1.8 V Regulation vs. Load OUT © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 VCC P2 15 10K PGOOD 2.49K COMP 20 56p ILIM 17 ...

  • Page 9

    ... Typical operating characteristics using the circuit shown in Figure 10. V Figure 15. SW and V OUT Figure 17. Transient Response, 1.5-3A Load (Circuit Values Changed) Figure 19. Startup, 3A Load © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 (Continued) Ripple, 3A Load Figure 16. Startup with 1V Pre-Bias =12V, V =5V, unless otherwise specified ...

  • Page 10

    ... V UVLO or toggling the EN pin discharges the SS and CC resets the IC. © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Bias Supply The FAN2103 requires a 5V supply rail to bias the IC and provide gate-drive energy and controller power. ...

  • Page 11

    ... EN restores operation after a CC normal soft-start cycle (refer to Auto-Restart section). The over-current protection fault latch is active during the soft-start cycle. Use a 1% resistor for R © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0 Loop Compensation The loop is compensated using a feedback network around the error amplifier ...

  • Page 12

    ... CC keep the 1µA current sink from discharging EN to 1.1V. Figure 24. Fault Latch with Delayed Auto-Restart © 2007 Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 Over-Temperature Protection FAN2103 incorporates an over-temperature protection circuit that sets the fault latch when a die temperature of about 160° ...

  • Page 13

    ... 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 and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’ ...

  • Page 14

    ... Fairchild Semiconductor Corporation FAN2103 • Rev. 1.0.6 14 www.fairchildsemi.com ...