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PDF FP6187 Data sheet ( Hoja de datos )
| Número de pieza | FP6187 | |
| Descripción | 380KHz Step-Down Converter | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FP6187 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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2A, 23V, 380KHz Step-Down Converter
FP6187
General Description
The FP6187 is a buck regulator with a built-in internal power MOSFET. It can provide 2A
continuous output current over a wide input supply range with excellent load and line regulation.
Current mode operation provides fast transient response and eases loop stabilization. The device
includes cycle-by-cycle current limiting and thermal shutdown protection. The regulator only consumes
23μA supply current in shutdown mode. The FP6187 requires a minimum number of readily available
external components to complete a 2A buck regulator solution.
Features
¾ 2A Output Current
¾ 0.22Ω Internal Power MOSFET Switch
¾ Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency
¾ 23μA Shutdown Mode Current
¾ Fixed 380KHz frequency
¾ Thermal Shutdown
¾ Cycle-by-Cycle Over Current Protection
¾ Wide 4.75 to 23V Operating Input Range
¾ Output Adjustable From 1.23 to 21V
¾ Available SOP-8L Package
¾ Under Voltage Lockout
Applications
¾ Distributed Power Systems
¾ Battery Charger Network Cards
¾ Pre-Regulator for Linear Regulators
¾ DSL Modems
Typical Application Circuit
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. 0.6
1/14
1 page  
FP6187
Recommended Operating Conditions
Parameter
Symbol
Conditions
Supply Voltage
VIN
Operating Temperature
Min.
4.75
-40
Typ.
Max.
23
85
Unit
V
℃
DC Electrical Characteristics (VIN=12V, TA= 25℃, unless otherwise noted)
Parameter
Symbol Test Conditions
Standby Current
ISB VEN≧3V, VFB≧1.5V
Shutdown Supply Current
Feedback Voltage
IST VEN=0V
VFB VCOMP<2V
High Side Switch ON Resistance RON-HS
Low Side Switch ON Resistance RON-LS
High Side Switch Leakage Current
Current Limit
Oscillation Frequency
Short Circuit Oscillation
Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Under Voltage Lockout Threshold
Under Voltage Lockout Threshold
Hysteresis
EN Threshold Voltage
EN Pull Up Current
IIL
ICL
fOSC
fSC
DMAX
DMIN
VUVLO
VHYS
VEN
IEN
VEN=0V, VSW=0V
VFB=0V
VFB=1.0V
VFB=1.5V
VEN Rising
ICC＞100μA
VEN=0V
Thermal Shutdown
TTS
Min.
1.17
2.8
320
2.0
0.7
Typ.
1.0
23
1.23
0.22
10
0.1
3.4
380
125
90
2.5
200
1.0
1.0
+140
Max.
1.5
50
1.27
10
4.7
460
0
3.0
1.3
Unit
mA
µA
V
Ω
Ω
µA
A
KHz
KHz
%
%
V
mV
V
µA
°C
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. 0.6
5/14
5 Page 
FP6187
( )ΔVOUT
=
VOUT × VIN − VOUT
f × L × VIN
×
⎜⎜⎝⎛ESR
+
8
×
f
1
× COUT
⎟⎟⎠⎞
In the case of ceramic capacitors, the output ripple is dominated by the capacitance value
because of its low ESR. In the case of tantalum or electrolytic capacitors, the capacitor high ESR
dominates the output ripple. Followings are equations for determining appropriate capacitor
parameters.
Ⅰ. Ceramic capacitors: choose capacitance value
C OUT
=
8×f2
VOUT
× L × ΔVOUT
× ⎜⎜⎝⎛1 −
VOUT
VIN
⎟⎟⎠⎞
Ⅱ. Tantalum or electrolytic capacitors: choose capacitor with ESR value
( )ESR
=
ΔVOUT
VOUT ×
× f × L × VIN
VIN − VOUT
PC Board Layout Checklist
1. The power traces, consisting of the GND, SW and VIN traces, should be kept short, direct and
wide.
2. Place CIN near IN pin as closely as possible to maintain input voltage steady and filter out the
pulsing input current.
3. The resistive divider R2 and R4 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 have a ground plane between the top and
feedback trace routing layer. This reduces EMI radiation on to the DC-DC converter’s own
voltage feedback trace.
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. 0.6
11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet FP6187.PDF ] | |
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