Fairchild FEB137-002, FEB138-002, FAN2002, FAN2001 User Manual
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FEB137-002 / FEB138-002
User Guide
FAN2001 / FAN2002
Evaluation Board
Featured Fairchild Product: FAN2001 / FAN2002
www.fairchildsemi.com/FEBsupport
© 2007 Fairchild Semiconductor Corporation FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
www.fairchildsemi.com
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
© 2007 Fairchild Semiconductor Corporation 2 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
www.fairchildsemi.com
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 V
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.
IN
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 V
constant.
4. The output voltage level is V
10K. For V
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, I
6. If quiescent current is a key design parameter, a higher value feedback resistor R2 can be
used, along with a small bypass capacitor C
OUT
> V
IN
OUT
OUT
= V
(1 + (R1/R2)) where V
REF
= 1.2V, R1 is preset to 5K and for V
< 50µA.
Q
(e.g. R2 = 100K and CF = 10pF).
F
+ 0.6V and I
= 3.3V, R1 is preset to 31.25K.
OUT
< 1A, V
LOAD
= 0.8V (typical) and R2 =
REF
remains
OUT
Figure 1. FAN2001MPX Board Figure 2. FAN2002MPX Board
© 2007 Fairchild Semiconductor Corporation 3 FEB137/138_FAN2001/FAN2002 1 • Rev. 0.0.2
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