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PDF FP6189 Data sheet ( Hoja de datos )
| Número de pieza | FP6189 | |
| Descripción | 385KHz Step-Down Converter | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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3A, 23V, 385KHz Step-Down Converter
FP6189
General Description
The FP6189 is a buck regulator with a built-in internal power MOSFET. It can provide 3A
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 20μA supply current in
shutdown mode. The FP6189 requires a minimum number of readily available external components to
complete a 3A buck regulator solution.
Features
3A Output Current
Adjustable Soft-Start
0.1Ω Internal High Side Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
Up to 95% Efficiency
20μA Shutdown Mode Current
Fixed 385KHz frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75 to 23V Operating Input Range
Output Adjustable From 0.92V to 21V
Available SOP-8L (EP)
Under Voltage Lockout
Applications
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
Typical Application Circuit
VIN
12V
1 BS
SS 8
2 IN
EN 7
FP6189
3
SW
6
COMP
4 GND
5
FB
EN
VOUT
3.3V
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. 0.61
1/14
1 page  
FP6189
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 (VIN=12V, TA= 25°C, unless otherwise noted)
Parameter
Symbol
Conditions
Min. Typ. Max.
Shutdown Supply Current
lST VEN=0
20 30
Supply Current
ICC VEN=2.6V, VFB=1.4V
1 1.2
Feedback Voltage
VFB VIN=12V, VCOMP<2V
0.892 0.92 0.948
Error Amplifier Voltage Gain
Error Amplifier Trans-
conductance
GEA
△IC=±10µA
400
500 800
High Side Switch ON Resistance RON-HS
0.1
Low Side Switch ON Resistance
High Side Switch Leakage
Current
RON-LS
IIL VEN=0V, VSW=0V
10
0.1 10
Current Limit
Current Sense to COMP
Tran-conductance
ICL
5.5
4.4
Oscillation Frequency
Short Circuit Oscillation
Frequency
Maximum Duty Cycle
FOSC
VFB=0V
VFB=1.0V
335 385 435
40 64 88
90
Minimum Duty Cycle
VFB=1.5V
0
Under Voltage Lockout Threshold
Under Voltage Lockout Threshold
Hysteresis
VUVLO
VHYS
VEN Rising
2.37 2.54 2.71
210
EN Threshold Voltage
VEN
0.9 1.2 1.5
EN Pin Pull Up Current
IEN VEN=0V
1.1 1.8
3
Soft Start Period
VSS CSS=0.1 µF
10
Thermal Shutdown
TTS
150
Unit
µA
mA
V
V/V
µA / V
Ω
Ω
µA
A
A/V
KHz
KHz
%
%
V
mV
V
µA
ms
°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. 0.61
5/14
5 Page 
FP6189
VOUT
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
8f2
VOUT
L VOUT
1
VOUT
VIN
Ⅱ. Tantalum or electrolytic capacitors: choose capacitor with ESR value
ESR
VOUT
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 directly to FB pin 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. 0.61
11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet FP6189.PDF ] | |
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