FP6111D-G1 [FEELING]
320KHz, 2A Asynchronous Buck Regulator;
| 型号： | FP6111D-G1 |
| 厂家： | 
Feeling Technology |
| 描述： | 320KHz, 2A Asynchronous Buck Regulator |
| 文件： | 总15页 (文件大小：472K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP6111
320KHz, 2A Asynchronous Buck Regulator
General Description
The FP6111 is a wide input range buck switching regulator suitable for most applications. The
FP6111 includes a high current P-MOSFET, a high precision reference (0.8V) for comparing output
voltage with a feedback amplifier, an internal soft start timer and dead-time controller. The oscillator
controls both the maximum duty cycle and PWM frequency.
Features
Precision Feedback Reference Voltage: 0.8V (2%)
Wide Supply Voltage Operating Range: 3.6 to 20V
Low Current Consumption: 3mA
Internal Fixed Oscillator Frequency: 320KHz (Typ.)
Internal Soft-Start Function (SS)
Built-In P-MOSFET for 2A Output Loading
Over Current Protection
Package: SOP-8L
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
1/15
FP6111
Function Block Diagram
EN
Enable
Control
Reference
Regulator
Over Current
Protection
Oscillator
2.5V
FB
Output Driver
Control
Error
Amplifier
0.8V
COMP
Internal
Soft-Start
Thermal
Protection
GND
GND
LX
LX
Pin Descriptions
SOP-8L
Name No. I / O
Description
FB
COMP
EN
1
2
3
4
5
6
7
8
I
Error Amplifier Inverting Input
O
I
Error Amplifier Output for Compensation
Enable Control
VCC
P
O
O
P
P
IC Power Supply (PMOS Source)
PMOS High Current Output
PMOS High Current Output
IC Ground
LX
LX
GND
GND
IC Ground
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
2/15
FP6111
IC Date Code Identification
FP6111
Halogen Free
Lot Number
Mass Production Version
Per-Half Month
Year
Halogen Free: Halogen free product indicator
Lot Number: Wafer lot number’s last two digits
For Example: 132386TB 86
Mass Production Version: Mass production mask version
Per-Half Month: Production period indicated in half month time unit
For Example: January → A(Front Half Month), B (Last Half Month)
February → C(Front Half Month), D(Last Half Month)
Year: Production year’s last digit
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
3/15
FP6111
Ordering Information
Part Number
Operating Temperature Package
MOQ
100 EA
2500 EA
Description
Tube
FP6111D-G1
FP6111DR-G1
-25°C ~ +85°C
-25°C ~ +85°C
SOP-8L
SOP-8L
Tape & Reel
Absolute Maximum Ratings
Parameter
Symbol
Conditions
Min.
Typ.
Max.
25
Unit
V
VCC
Power Supply Voltage
2.2
A
Output Source Current
Error Amplifier Inverting Input
Allowable Power Dissipation
-0.3
1.2
V
PD
650
mW
SOP-8L TA≦+25°C
Junction to Ambient Thermal
Resistance
Junction to Case Thermal
Resistance
θJA
+175
°C / W
°C / W
θJC
+45
+85
-25
2
Operating Temperature
°C
KV
V
HBM (Human Body Mode)
MM (Machine Mode)
SOP-8L
ESD Susceptibility
200
-55
TS
+125
+260
Storage Temperature
°C
°C
SOP-8L Lead Temperature
(soldering, 10 sec)
Suggested IR Re-flow Soldering Curve
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
4/15
FP6111
Recommended Operating Conditions
Parameter
Symbol
Conditions
Min.
3.6
Typ.
Max.
Unit
V
Supply Voltage
Operating Temperature
VCC
20
85
-25
°C
DC Electrical Characteristics (VCC=6V, TA = 25°C, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Reference
Feedback Voltage
Input Regulation
VREF
0.784
0.8
2
0.816
12.5
V
△VREF /
VREF
VCC=3.6 to 20 V
mV
1
1
2
2
%
%
TA= -25 to +25°C
TA= 25 to +85°C
Feedback Voltage Change with
Temperature
△VREF /
VREF
Oscillator Section
Oscillation Frequency
f
0.4V < VCOMP < 0.7V
VCOMP<0.4V
320
30
KHz
KHz
Short Circuit or Over Current
Oscillation Frequency
fSC
Frequency Change with Voltage
Δf / ΔV VCC=3.6V to 25V
Δf / ΔT
5
5
%
%
Frequency Change with
Temperature
TA = -25 to +85°C
Idle Period Adjustment Section
Maximum Duty Cycle
TDUTY VFB =0.2V
80
%
Output Section
PMOS source Current
PMOS D-S Voltage
Output Leakage Current
ID
-2
A
V
-30
VDSS VCOMP=0.1V
IL
5
µA
mΩ
mΩ
VCC=5.0V, VFB=0V
70
42
150
90
PMOS On Resistance
RDS (ON)
VCC=10V, VFB=0V
Thermal Shutdown Section
Thermal Shutdown Temperature
+150
4
°C
Over Current Protection Section
PMOS OCP Current
IOCP
VCC=12V
A
Total Device Section
EN Pin Input Current
IEN
VEN = GND
20
µA
V
EN Pin On Threshold
EN Pin Off Threshold
EN Pin Hysteresis
VUPPER EN pin upper
VLOW EN pin low
VHYS
1.12
0.87
250
2
V
210
mV
µA
mA
Supply Shutdown Current
Supply Average current
ISD
VEN=0V
10
6
IAVE
4
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
5/15
FP6111
Parameter
Error Amplifier Section
Input Bias Current
Symbol
Conditions
Min.
Typ.
Max.
Unit
lB
-1.0
0.2
µA
V / V
MHZ
V
Voltage Gain
Av
100
6
Frequency Bandwidth
Output Voltage Swing Positive
Output Voltage Swing Negative
Output Source Current
Output Sink Current
BW
VPOS
VNEG
Av=0 dB
1.7
2
0.1
-30
30
V
ISOURCE VCOMP=800mV
ISINK VCOMP=800mV
-15
15
µA
µA
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
6/15
FP6111
Typical Operating Characteristics
(VIN=12V, VOUT=3.3V, IOUT=2A, TA= 25°C, unless otherwise noted)
Load Regulation
Oscillator Frequency vs. VIN
VOUT=3.3V IOUT=200mA
V
IN=12V
360
358
356
354
352
350
348
346
344
342
340
3.55
3.53
3.51
3.49
3.47
3.45
3.43
3.41
3.39
3.37
3.35
0
0.5
1
1.5
2
0
5
10
15
20
IOUT (A)
VIN(V)
Line Regulation
OUT=200mA
Current Limit vs. VIN
I
5
4.8
4.6
4.4
4.2
4
3.438
3.436
3.434
3.432
3.43
3.428
3.426
3.424
3.422
3.42
3.8
3.6
3.4
3.2
3
3.418
0
5
10
15
20
0
5
10
15
20
VIN (V)
VIN (V)
Supply Current vs. Temperature
Supply Current vs. VIN
3.4
3.38
3.36
3.34
3.32
3.3
3.5
3.45
3.4
3.35
3.3
3.28
3.26
3.24
3.22
3.2
3.25
3.2
0
5
10
15
20
-40
-20
0
20
40
60
80
100
V
IN (V)
Temperature (
)
℃
Efficiecncy
Current Limit vs. Temperature
(VIN=12V,L=22uH)
6
5.5
5
90
80
70
60
50
4.5
4
VOUT=3.3V
VOUT=5V
3.5
3
2.5
-40
-20
0
20
40
60
80
100
0
0.5
1
1.5
2
I
OUT (A)
Temperature (
)
℃
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
7/15
FP6111
Output Ripple
Transient Response
(IOUT=0.1A to 2A)
Ch1: LX, Ch2: VOUT
Ch3: VOUT, Ch4: ILX
EN on Test
Power on Test
Ch1: EN, Ch2: LX, Ch3: VOUT, Ch4: ILX
Ch1: VIN, Ch2: LX, Ch3: VOUT, Ch4: ILX
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
8/15
FP6111
Function Description
Voltage Reference
A 2.5V reference regulator supplies FP6111 internal circuits and uses a resistive divider to
provide 0.8V precision reference voltage on the non-inverting terminal of error amplifier.
Error Amplifier
The error amplifier compares a sample of the DC-DC converter output voltage to the 0.8V (VREF)
reference and generates an error signal for the PWM comparator. Output voltage of the DC-DC
converter is setting by the resistor divider with following expression (see Figure 1)
R2
R1
VOUT 1
VREF
VOUT
T
R2
R1
Error Amplifier
1
36K
0.8V
500
FP6111
2
C1
Figure 1 Error Amplifier with Feedback resistance divider
The recommended resistor value is summarized below:
VOUT (V)
R1 (kΩ)
2.4k
3.2k
1.5k
2k
R2 (kΩ)
3k
1.8
2.5
3.3
5
6.8k
4.7k
10.5k
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
9/15
FP6111
Oscillator
The fixed frequency is generated by an internal RC oscillator. Its typical value is 320KHz in
normal operation and 30KHz in short circuit condition.
Thermal Protection
When a heavy loading draws current from the regulator, the chip temperature will rise. Once the
junction temperature exceeds 150℃, FP6111 thermal protection function will be triggered and the LX
output will be turned off. When junction temperature is lower, FP6111 starts again and enable LX pin
output.
Over Current Protection
The FP6111 uses cycle-by-cycle current limit to protect the internal power switch. During each
switching cycle, a current limit comparator detects if the power switch current exceeds the internal
setting current. Once over current occurs, the oscillator frequency will decrease to prevent the driver
from burning out.
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
10/15
FP6111
Application Information
Input Capacitor Selection
The input capacitor must be connected between the VCC and GND pin of the FP6111 to maintain
steady input voltage and filter out the pulsing input current. The voltage rating of input capacitor must
be greater than maximum input voltage plus ripple voltage.
In switch mode, the input current is discontinuous in a buck converter. The source current of the
high-side MOSFET is a square wave. To prevent large voltage transients, a low ESR input capacitor
sized for the maximum RMS current must be used. The RMS value of input capacitor current can be
calculated by:
VO
VO
IRMS IO
1
MAX
V
V
IN
IN
It can be seen that when VO is half of VIN, CIN is under the worst current stress. The worst current
stress on CIN is IO_MAX / 2.
Inductor Selection
The value of the inductor is selected based on the maximum tolerant ripple current. Large
inductance gives low inductor ripple current and small inductance result in high ripple current. However,
the larger value inductor usually has a larger physical size, higher series resistance, and lower
saturation current. On the experience, the value is to allow the peak-to-peak ripple current in the
inductor to be 10%~20% maximum load current. The inductance value can be calculated by:
(VIN VO ) VO
(VIN VO )
2 (10% ~ 20%)IO
VO
L
f IL VIN f
VIN
The inductor ripple current can be calculated by:
VO
VO
IL
1
f L
VIN
Choose an inductor that does not saturate under the worst-case load conditions, which is the
load current plus half the peak-to-peak inductor ripple current even at the highest operating
temperature. The peak inductor current is:
IL
2
IL _PEAK IO
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
11/15
FP6111
The inductors in different shape and style are available from manufacturers. Shielded inductors
are small and radiate less EMI issue. But they cost more than unshielded inductors. The choice
depends on EMI requirement, price and size.
Inductor Value (µH)
Dimensions(mm) Component Supplier
Model
10
10
15
10.3×10.3×4.0
10.1×10.1×3.0
10.3×10.3×4.0
FENG-JUI
Sumida
TPRH10D40-10R
CDRH104R
FENG-JUI
TPRH10D40-15R
Output Capacitor Selection
The output capacitor is required to maintain the DC output voltage. Low ESR capacitors are
preferred to keep the output voltage ripple low. In a buck converter circuit, output ripple voltage is
determined by inductor value, switching frequency, output capacitor value and ESR. The output ripple
is determined by:
1
VO IL ESRC
OUT
8 f COUT
Where f = operating frequency, COUT= output capacitance and ΔIL = ripple current in the inductor.
For a fixed output voltage, the output ripple is highest at maximum input voltage since ΔIL increases
with input voltage.
Using Ceramic Input and Output Capacitors
Care must be taken when ceramic capacitors are used at the input and the output. When a
ceramic capacitor is used at the input and the power is supplied by a wall adapter through long wires, a
load step at the output can induce ringing at the input, VIN. In best condition, this ringing can couple to
the output and be mistaken as loop instability. In worst condition, a sudden inrush of current through
the long wires can potentially generate a voltage spike at VIN, which may large enough to damage the
part. When choosing the input and output ceramic capacitors, choose the one with X5R or X7R
dielectric formulations. These dielectrics have the best temperature and voltage characteristics of all
the ceramics for a given value and size.
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 VCC pin as closely as possible to maintain input voltage steady and filter out the
pulsing input current.
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
12/15
FP6111
3. The resistive divider R1and R2 must be connected to FB pin directly and 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.
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 FP6111 GND pin by giving it a low impedance ground connection.
Suggested Layout
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
13/15
FP6111
Typical Application
FP6111 Basic DC-DC Regulator Circuit
For example:
The VIN power supply is 12V and the VOUT is designed for 5.0V / 2A solution.
The output voltage formula is:
2
R
10.5K
2K
VOUT 1
VREF 1
0.8V 5.0V
R1
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
14/15
FP6111
Package Outline
SOP-8L
Symbols
Min. (mm)
1.346
0.101
1.092
4.800
3.810
5.791
0.406
0°
Max. (mm)
1.752
0.254
1.498
4.978
3.987
6.197
1.270
8°
A
A1
A2
D
E
H
L
θ°
Note:
1. Package dimensions are in compliance with JEDEC Outline: MS-012 AA.
2. Dimension “D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E” does not include inter-lead flash, or protrusions.
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
15/15
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