Fairchild FEB137-002 User manual

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© 2007 Fairchild Semiconductor Corporation FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
FEB137-002 / FEB138-002
User Guide
FAN2001 / FAN2002
Evaluation Board
Featured Fairchild Product: FAN2001 / FAN2002
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© 2007 Fairchild Semiconductor Corporation 2 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
Table of Contents
1. Features ..................................................................................................................................................3
2. Description .............................................................................................................................................3
3. Operation................................................................................................................................................3
4. PCB Layout............................................................................................................................................4
5. Waveforms .............................................................................................................................................4
6. Schematics..............................................................................................................................................5
7. Materials Lists........................................................................................................................................6

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© 2007 Fairchild Semiconductor Corporation 3 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
The following user guide supports the evaluation kit for the FAN2001 and FAN2002. It
should be used in conjunction with the device datasheet as well as Fairchild application
notes and technical support team. Visit Fairchild’s website at www.fairchildsemi.com.
1. Features
2.5 to 5.5V Input Range
Up to 1A Output Current
Adjustable Output from 0.8V to VIN
Thermal Shutdown, Short-Circuit Protection, Soft Start, Output Over-Voltage Protection
1.3MHz Fixed-Frequency PWM Operation at Heavy Load and Burst Operation at Light Load
Up to 96% Efficiency, Synchronous Operation
Pb-Free, 6-lead 3x3mm MLP Package
2. Description
The FAN2001/2 Evaluation Board is a compact circuit including either the FAN2001
MPX or the FAN2002 MPX in a 3x3mm MLP package. Both models feature an external
resistor divider for varying output voltage and differ only in pin out. The FAN2001/2
demo board, a completely assembled and tested surface mount board, provides easy
probe access points to all inputs and outputs so that electrical characteristics and
waveforms can be easily measured.
3. Operation
1. Connect VIN (2.5 to 5.5V) and GND (0V).
2. Use a jumper to toggle the circuit between "ON" and "OFF" modes.
3. Observe that, for varying input levels, if VIN > VOUT + 0.6V and ILOAD < 1A, VOUT remains
constant.
4. The output voltage level is VOUT = VREF (1 + (R1/R2)) where VREF = 0.8V (typical) and R2 =
10K. For VOUT = 1.2V, R1 is preset to 5K and for VOUT = 3.3V, R1 is preset to 31.25K.
Note: R2 and R1 values are reversed for FAN2002MPX.
5. To verify supply current in “ON” and “OFF” modes; observe that, in shutdown mode, supply
current drops below 1µA and in "ON" mode, IQ< 50µA.
6. If quiescent current is a key design parameter, a higher value feedback resistor R2 can be
used, along with a small bypass capacitor CF(e.g. R2 = 100K and CF= 10pF).
Figure 1. FAN2001MPX Board Figure 2. FAN2002MPX Board

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© 2007 Fairchild Semiconductor Corporation 4 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
4. PCB Layout
Figure 3. FAN2001MPX PCB Layout
Figure 4. FAN2002MPX PCB Layout
5. Waveforms
Figure 5. Start-Up Waveform in Full Load (VIN=5.5V)

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© 2007 Fairchild Semiconductor Corporation 5 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
6. Schematics
1
2
3
P1
6
5
4
VIN
PGND
EN
VOUT
NC
FB
V
OUT
V
IN
Note: Cf is OPEN (not installed on regular eval board.)
C
IN
10µF Cf C2
10µF C3 10µF
ON
L
3.3µH
R2
10K
R1
OFF
Figure 6. FAN2001MPX Schematic (R1 = 5K for VOUT = 1.2V and R1 = 31.25K for VOUT = 3.3V)
1
2
3
P1
6
5
4
FB
PGND
SW
EN
VIN
PVIN
V
OUT
V
IN
C
IN
10µF
Cf
C2
10µF
C1
10µF
ON
L
3.3µH
R1
10K
R2
OFF
Figure 7. FAN2002MPX Schematic (R1 = 5K for VOUT = 1.2V and R1 = 31.25K for VOUT = 3.3V)

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© 2007 Fairchild Semiconductor Corporation 6 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
7. Materials Lists
Table 1. FAN2001MPX List of Materials
Description Qty. Ref. Vendor Part Number
Inductor 3.3µH, Isat = 0.5A 1 L Any
MURATA GRM31CR70J106K
Capacitor 10µF, 10%, 6.3V, X5R, 1206 3 C2, C3, CIN Panasonic ECJ-3YB0J106K
Resistor 10Kohm, 1%, 1206 1 R2 Any
Resistor 31.25Kohm, 1%, 0805
(for option VOUT set 3.3V) 1 R1 Any
Resistor 4.99Kohm, 1%, 0805
(for option VOUT set 1.2V) 1 R1 Any
Hardware Connector Header .
1 SINGLE STR 36POS 9 VIN, VOUT, GND, ON/OFF Digi-Key S1011-36-ND
IC DC/DC Regulator, 6-lead MLP 3x3mm,
FSID: FAN2001MPX 1 U1 Fairchild Semiconductor FAN2001MPX
Hardware, SHUNT, PHBR 15AU 1 ON/OFF DIGI-KEY A26227-ND
Table 2. FAN2002 MPX List of Materials
Description Qty. Ref. Vendor Part Number
Inductor 3.3µH, Isat = 0.5A 1 L Any
MURATA GRM31CR70J106K
Capacitor 10µF, 10%, 6.3V, X5R, 1206 3 C1, C2, CIN Panasonic ECJ-3YB0J106K
Resistor 10Kohm, 1%, 1206 1 R1 Any
Resistor 31.25Kohm, 1%, 1206
(for option VOUT set 3.3V) 1 R2 Any
Resistor 4.99Kohm, 1%, 1206
(for option VOUT set 1.2V) 1 R2 Any
Hardware Connector Header
.1 SINGLE STR 36POS 9 VIN, VOUT, GND, ON/OFF Digi-Key S1011-36-ND
IC DC/DC Regulator, 6-lead MLP 3x3mm,
FSID: FAN2002MPX 1 U1 Fairchild Semiconductor FAN2002MPX
Hardware, SHUNT, PHBR 15AU 1 ON/OFF DIGI-KEY A26227-ND
Table 3. Ordering Information
Product Number Package Type Order Code
FAN2001 Pb-Free, 6-Lead 3x3mm Molded Leadless Package (MLP) FAN2001MPX
FAN2002 Pb-Free, 6-Lead 3x3mm Molded Leadless Package (MLP) FAN2002MPX

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WARNING AND DISCLAIMER
Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’
Guide. Contact an authorized Fairchild representative with any questions.
The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales
contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees
that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application.
Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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CORPORATION.
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1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
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when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in significant injury to the user.
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device or system whose failure to perform can be
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device or system, or to affect its safety or effectiveness.
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