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PDF FP6167dR-LF-ADJ Data sheet ( Hoja de datos )

Número de pieza FP6167dR-LF-ADJ
Descripción 1A Synchronous Step-Down Regulator
Fabricantes Feeling Technology 
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FP6167
Dual 1.5MHz, 1A Synchronous Step-Down Regulator
General Description
The FP6167 is a high efficiency current mode dual synchronous buck PWM DC-DC regulator.
The internal generated 0.6V precision feedback reference voltage is designed for low output voltage.
Low RDS(ON) synchronous switch dramatically reduces conduction loss. To extend battery life for
portable application, 100% duty cycle is supported for low-dropout operation. Shutdown mode also
helps saving the current consumption. The FP6167 is packaged in DFN-12L to reduce PCB space.
Features
Input Voltage Range: 2.5 to 5.5V
Adjustable Output Voltage From 0.6V to VIN
Precision Feedback Reference Voltage: 0.6V (±2%)
Output Current: 1A (Max.) Each Channel
Duty Cycle: 0~100%
Internal Fixed PWM Frequency: 1.5MHz
Low Quiescent Current: 160μA
No Schottky Diode Required
Built-in Soft Start
Current Mode Operation
Over Temperature Protection
Package: DFN-12L
Applications
Cellular Telephone
Wireless and DSL Modems
Digital Still Cameras
Portable Products
MP3 Players
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.66
1/14

1 page




FP6167dR-LF-ADJ pdf
IR Re-flow Soldering Curve
FP6167
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.66
5/14

5 Page





FP6167dR-LF-ADJ arduino
FP6167
Output Voltage Programming
In the adjustable version, the output voltage is set using a resistive voltage divider from the output
voltage to FB. The output voltage is:
VO
0.6V1
R1
R2

The recommended resistor value is summarized below:
VOUT (V)
0.6
1.2
1.5
1.8
2.5
3.3
R1 (Ω)
200k
200k
300k
200k
270k
306k
R2 (Ω)
Not Used
200k
200k
100k
85k
68k
C3 (F)
Not Used
10p
10p
10p
10p
10p
PC Board Layout Checklist
1. The power traces, consisting of the GND trace, the SW trace and the VIN trace should be kept
short, direct and wide.
2. Place CIN near VIN Pin as closely as possible. To maintain input voltage steady and filter out the
pulsing input current.
3. The resistive divider R1and R2 must be connected to FB pin directly as closely as possible.
4. FB is a sensitive node. Please keep it away from switching node, SW. A good approach is to
route the feedback trace on another layer and to have a ground plane between the top layer and
the layer on which the feedback trace is routed. This reduces EMI radiation on to the DC-DC
converter’s own voltage feedback trace.
5. Keep the GND plates of CIN and COUT as close as possible. Then connect this to the
ground-plane (if one is used) with several vias. This reduces ground plane noise by preventing
the switching currents from circulating through the ground plane. It also reduces ground bounce
at the FP6167 by giving it a low impedance ground connection.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.66
11/14

11 Page







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