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PDF FP6185 Data sheet ( Hoja de datos )
| Número de pieza | FP6185 | |
| Descripción | 380KHz Step-Down Converter | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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2A, 23V, 380KHz Step-Down Converter
FP6185
General Description
The FP6185 is a buck regulator with a built-in internal power MOSFET. It achieves 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. Adjustable soft-start reduces the
stress on the input source during power-on. The regulator only consumes 23μA supply current in
shutdown mode. The FP6185 requires a minimum number of readily available external components to
complete a 2A buck regulator solution.
Features
2A Output Current
Adjustable Soft-Start
0.18Ω Internal High Side Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
Up to 95% Efficiency
23μA Shutdown Mode Current
Fixed 380KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75 to 23V Operating Input Range
Output Adjustable From 0.92 to 16V
Available Package: SOP-8L
Under Voltage Lockout
Applications
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
DSL Modems
Typical Application Circuit
VIN
1
BS
8
SS
2 IN
7
EN
FP6185
3
SW
6
COMP
4 GND
5
FB
EN
VOUT
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. 0.62
1/14
1 page  
FP6185
Recommended Operating Conditions
Parameter
Symbol
Conditions
Supply Voltage
VIN
Operating Temperature
Min.
4.75
-40
Typ.
Max.
23
+85
Unit
V
°C
DC Electrical Characteristics (TA= 25°C, VIN=12V, unless otherwise noted)
Parameter
Symbol
Conditions
Min. Typ. Max.
Standby Current
Operating Current
IST VEN≧3V,VFB>1V
ICC VEN≧3V
0.3 0.5 0.7
3.2 4.2 6.1
Shutdown Supply Current
ISH VEN=0
15 23 36
Feedback Voltage
Current Sense Tran-conductance
Output Current to Comp Pin
Voltage
Error Amplifier Voltage Gain
Error Amplifier Tran-conductance
VFB VIN=12V,VCOMP<2V
TCS
GEA
TEA △ICOMP=±10µA
0.892 0.92 0.948
2.1
400
830
High Side Switch On Resistance RON-HS
0.18
Low Side Switch On Resistance
High Side Switch Leakage
Current
Current Limit
RON-LS
IIL VEN=0,VSW=0V
ICL
10
0.1 10
3.4
Oscillation Frequency
Short Circuit Oscillation
Frequency
Maximum Duty Cycle
fOSC
fSC
DMAX
VFB=0V
VFB=0.8V
380
240
90
Minimum On Time
TON
100
Under Voltage Lockout Threshold
Under Voltage Lockout Threshold
Hysteresis
EN Threshold Voltage
Enable Pin Pull Up Current
Soft-Start Pin Equivalent Output
Resistance
VUVLO
VHYS
VEN
IEN
RSS
ICC＞100μA
VEN=0V
2.37 2.5 2.62
210
0.7 1 1.3
1
9
Thermal Shutdown
Thermal Shutdown Reset
Hysteresis
TTS
THYS
+150
+40
Unit
mA
mA
µA
V
A/V
V/V
µA / V
Ω
Ω
µA
A
KHz
KHz
%
ns
V
mV
V
µA
kΩ
°C
°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. 0.62
5/14
5 Page 
FP6185
capacitance. The output voltage ripple is mainly decided by the capacitance value. Choose the
capacitor value with following equation.
C OUT
8f2
VOUT
L VOUT
1
VOUT
VIN
In the case of tantalum or electrolytic capacitors, the ESR dominates the impedance at the
switching frequency. Choose the capacitor with suitable ESR calculated following.
ESR
VOUT
VOUT
f L VIN
VIN VOUT
PC Board Layout Checklist
The power traces, consisting of the GND trace, the SW trace and the VIN trace should be kept
short, direct and wide.
Place CIN near IN Pin as closely as possible to maintain input voltage steady and filter out the
pulsing input current.
The resistive divider R2 and R4 must be connected to FB pin directly as close as possible.
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 switching EMI radiation to disturb 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. 0.62
11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet FP6185.PDF ] | |
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