FP6160B [FEELING]
1.5MHz, 600mA Synchronous Step-Down Regulator;
| 型号： | FP6160B |
| 厂家： | 
Feeling Technology |
| 描述： | 1.5MHz, 600mA Synchronous Step-Down Regulator |
| 文件： | 总14页 (文件大小：422K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP6160B
1.5MHz, 600mA Synchronous Step-Down Regulator
General Description
The FP6160B is a high efficiency current mode 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 FP6160B is packaged in SOT23-5L, and TSOT23-5L to reduce PCB
space.
Features
Input Voltage Range: 2.5 to 5.5V
Precision Feedback Reference Voltage: 0.6V (±2%)
Output Current: 0.6A (Max.)
Duty Cycle: 0~100%
Internal Fixed PWM Frequency: 1.5MHz
Low Quiescent Current: 100μA
No Schottky Diode Required
Built-in Soft Start
Current Mode Operation
Over Temperature Protection
Package: SOT23-5L, TSOT23-5L
Applications
Cellular Phones
Wireless and DSL Modems
Digital Still Cameras
Portable Products
MP3 Players
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. 0.62
1/14
FP6160B
Function Block Diagram
Pin Descriptions
SOT23-5L / TSOT23-5L
Name No. I / O
Description
RUN
GND
1
2
3
4
5
I
P
O
P
I
Enable
TOP View
Ground
1
5
FB / VOUT
RUN
SW
Switch
VIN
Power Supply
Feedback
FB / VOUT
2
3
GND
SW
VIN
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. 0.62
2/14
FP6160B
Marking Information
SOT23-5L / TSOT23-5L
AI986
Lot Number
Year
Part Number Code
Lot Number: Wafer lot number’s last two digits
For Example: 132386TB 86
Year: Production year’s last digit
art Number Code: Part number identification code for this product. It should be always “AI”
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
3/14
FP6160B
Ordering Information
Part Number
FP6160BKR-LF-ADJ
FP6160BiR-LF-ADJ
Code Operating Temperature Package
MOQ
3000EA
3000EA
Description
Tape & Reel
Tape & Reel
AI
AI
-40°C ~ +85°C
-40°C ~ +85°C
SOT23-5L
TSOT23-5L
Absolute Maximum Ratings
Parameter
Symbol
Conditions
Min.
Typ.
Max.
6
Unit
V
Input Supply Voltage
VIN
-0.3
-0.3
RUN, VFB, SW Voltage
VIN
V
P-Channel Switch Source Current (DC)
N-Channel Switch Source Current (DC)
0.78
0.78
A
A
Peak SW Switch Sink and Source
Current (AC)
1.56
A
SOT23-5L
+250
+250
+90
°C / W
°C / W
°C / W
°C / W
°C
Thermal Resistance (Junction to
Ambient)
θJA
θJC
TSOT23-5L
SOT23-5L
TSOT23-5L
Thermal Resistance (Junction to Case)
+90
Operating Temperature
Junction Temperature
Storage Temperature
-40
-65
+85
+150
+150
250
°C
°C
SOT23-5L
mW
Allowable Power Dissipation
PD
TSOT23-5L
250
mW
Lead Temperature (soldering, 10 sec)
+260
°C
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. 0.62
4/14
FP6160B
Recommended Operating Conditions
Parameter
Symbol
Conditions
Min.
2.5
Typ.
Max. Unit
Supply Voltage
Operating Temperature
VIN
5.5
V
-40
+85
°C
DC Electrical Characteristics (TA= 25°C , VIN=3.6V, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
0.588
0.582
Typ.
Max. Unit
0.6
0.612
0.618
0.4
V
V
TA=25°C
Regulated Feedback Voltage
VFB
0.6
-40°C ~+85°C
Line Regulation with VREF
Regulated Output Voltage
VIN=2.5V to 5.5V
0.04
1.5
VFB
VOUT
/ V
V
FP6160B-1.5, IOUT=100mA
FP6160B-1.8, IOUT=100mA
VIN=2.5 to 5.5V
1.455
1.746
1.545
1.854
0.4
1.8
V
Output Voltage LineRegulation
RDS (ON) of P-Channel FET
RDS (ON) of N-Channel FET
SW Leakage
0.04
0.4
% / V
Ω
VOUT
RDS (ON) P ISW=100mA
RDS (ON) N ISW =-100mA
0.35
±0.01
1.2
Ω
µA
A
ILSW
IPK
VRUN=0V, VIN=5V
VFB=0.5V
±1
1
Peak Inductor Current
1
Shutdown, VRUN=0V
Active, VFB=0.5V, VRUN=VIN
0.1
µA
µA
V
Quiescent Current
ICC
100
1
RUN Threshold
VRUN
IRUN
0.3
1.2
1.5
±1
RUN Leakage Current
±0.01
µA
Oscillator Frequency
FOSC
VFB=0.6V
1.5
1.8
MHz
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
FP6160B
Typical Operating Characteristics
(TA= 25°C, VIN=3.6V, unless otherwise noted)
Supply Current vs. VIN
Supply Current vs. VIN
100
24
23
22
21
20
19
18
VFB=0.5V
VFB=0.7V
95
90
85
80
75
70
65
85℃
85℃
-45℃
25℃
-45℃
25℃
2
3
4
5
6
2
3
4
5
6
VIN (V)
V
IN (V)
Line Regulation
Supply Current vs. VIN
0.61
0.605
0.6
18
TA=25℃
Shutdown
16
14
12
10
8
85℃
0.595
0.59
6
4
25℃
-45℃
2
0
0.585
2
3
4
5
6
2
3
4
5
6
VIN (V)
VIN (V)
Reference Voltage vs. Temperature
Frequency vs. VIN
1.56
1.54
1.52
1.5
0.605
0.604
0.603
0.602
0.601
0.6
TA=25℃
VIN=3.6V
0.599
0.598
0.597
0.596
0.595
1.48
1.46
1.44
2
3
4
IN (V)
5
6
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
V
Temperature
)
(℃
Frequency vs. Temerature
Switch Leakage vs. Input Volatge
1.58
1.56
1.54
1.52
1.5
1.2
1
VIN =3.6V
T =25
℃
A
0.8
0.6
0.4
0.2
0
1.48
1.46
1.44
1.42
1.4
Synchronous Switch
Main Switch
1
2
3
4
5
6
7
-50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
Temperature(
V
IN (V)
)
℃
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
6/14
FP6160B
Function Description
Control Loop
The FP6160B is a high efficiency current mode synchronous buck regulator. Both the main
(P-channel MOSFET) and synchronous (N-channel MOSFET) switches are built internally. With
current mode operation, the PWM duty is controlled both by the error amplifier output and the peak
inductor current. At the beginning of each cycle, the oscillator turn on the P-MOSFET switch to
source current from VIN to SW output. Then, the chip starts to compare the inductor current with the
error amplifier output. Once the inductor current is larger than the error amplifier output, the
P-MOSFET switch is turned off. When the load current increases, the feedback voltage FB will
slightly drop. This causes the error amplifier to output a higher current level until the prior mentioned
peak inductor current reach the same level. The output voltage then can be sustained at the same.
When the top P-MOSFET switch is off, the bottom synchronous N-MOSFET switch is turned on.
Once the inductor current reverses, both top and bottom MOSFET will be turn off to leave the SW pin
into high impedance state.
The FP6160B’s current mode control loop also contains slope compensation to suppress
sub-harmonic oscillations at high duty cycles. This slope compensation is achieved by adding a
compensation ramp to the inductor current signal.
LDO Mode
The FP6160B’s maximum duty cycle can reach 100%. That means the driver main switch is
turn on through out whole clock cycle. Once the duty reaches 100%, the feedback path no longer
controls the output voltage. The output voltage will be the input voltage minus the main switch voltage
drop.
Over Current Protection
FP6160B limits the peak main switch current cycle by cycle. When over current happens, chip
will turn off the main switch and turn the synchronous switch on until next cycle.
Short Circuit Protection
When the FB pin drops below 300mV, the chip will tri-state the output pin SW automatically. After
300us rest to avoid over heating, chip will re-initiate PWM operation with soft start.
Thermal Protection
FP6160B will shutdown automatically when the internal junction temperature reaches 150°C to
protect both the part and the system.
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
7/14
FP6160B
Application Information
Input Capacitor Selection
The input capacitor must be connected to the VIN pin and GND pin of the FP6160B 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(MAX)
1
VIN
VIN
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 desired ripple current. Large inductance gives
low inductor ripple current and small inductance result in high ripple current. However, the larger value
inductor has a larger physical size, higher series resistance, and / or lower saturation current. In
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:
(V VO ) VO
(V VO )
2(10% ~ 20%)IO
VO
IN
IN
L
f IL
V
f
V
IN
IN
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. 0.62
8/14
FP6160B
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
2.2
2.2
3.3
4.7
4.7
4.7
4.2×3.7×1.2
4.4×5.8×1.2
4.2×3.7×1.2
4.2×3.7×1.2
4.4×5.8×1.2
4.9×4.9×1.0
FENG-JUI
Sumida
TP4212-2R2M
CMD4D11 2R2
TP4212-3R3M
TP4212-4R7M
CMD4D11 4R7
CLSD09 4R7
FENG-JUI
FENG-JUI
Sumida
Sumida
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 ESRCOUT
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.
Capacitor Value (µF) Case Size Component Supplier
Model
4.7
10
10
22
0603
0805
TDK
Taiyo Yuden
TDK
C1608JB0J475M
JMK212BJ106MG
C12012X5ROJ106K
C2012JB0J226M
0805
0805 1206
TDK
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. At best, this ringing can couple to the output
and be mistaken as loop instability. At worst, a sudden inrush of current through the long wires can
potentially cause a voltage spike at VIN, large enough to damage the part. When choosing the input
and output ceramic capacitors, choose the X5R or X7R dielectric formulations. These dielectrics have
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
9/14
FP6160B
the best temperature and voltage characteristics of all the ceramics for a given value and size.
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:
R
1
VO 0.6V 1
R2
The recommended resistor value is summarized below:
VOUT (V)
0.6
R1 (Ω)
200k
200k
300k
200k
270k
306k
R2 (Ω)
Not Used
200k
1.2
1.5
200k
1.8
100k
2.5
85k
3.3
68k
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.
4.
The resistive divider R1and R2 must be connected to FB pin directly as closely 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 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 visa. This reduces ground plane noise by
preventing he switching currents from circulating through the ground plane. It also reduces
ground bounce at the FP6160B 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. 0.62
10/14
FP6160B
GROUND PLANE
VIA TO VOUT
C3
R1
R2
VIA TO VIN
1
5
4
2
3
FP6160B
VIN
C1
C2
VOUT
GND
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. 0.62
11/14
FP6160B
Typical Application
I
LOAD: 60mA~600mA
ILOAD: 200mA~600mA
Ch1:VOUT Ch2: ISW
Ch1: VOUT Ch2: ISW
EN on waveform (VOUT: 2.5V)
Efficiency (VOUT: 2.5V)
100
90
80
70
60
50
40
30
20
10
0
Vcc=2.7V
Vcc=3.6V
Vcc=4.2V
0.1
1
10
100
1000
Ch1: EN Ch2: SW Ch3: VOUT Ch4: ISW
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
12/14
FP6160B
Package Outline
SOT23-5L
UNIT: mm
Max.(mm)
Symbols
Min. (mm)
1.050
A
A1
A2
b
1.350
0.150
1.200
0.500
0.200
3.000
3.000
1.700
0.050
1.000
0.250
c
0.080
D
2.700
E
2.600
E1
e
1.500
0.950 BSC
1.900 BSC
e1
L
0.300
0.550
L1
L2
θ°
θ1°
θ2°
0.600 REF
0.250 BSC
0°
3°
6°
10°
7°
10°
Note:
1. Package dimensions are in compliance with JEDEC outline: MO-178 AA.
2. Dimension “D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E1” 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. 0.62
13/14
FP6160B
TSOT23-5L
Unit: mm
Max. (mm)
Symbols
Min. (mm)
0.750
A
A1
A2
b
0.800
0.050
0.775
0.500
0.200
3.000
3.000
1.700
0.000
0.700
0.350
c
0.100
D
2.800
E
2.600
E1
e
1.500
0.950 BSC
1.900 BSC
e1
L
0.370
0.600
L1
L2
R
0.600 REF
0.250 BSC
0.100
0.100
0°
R1
θ°
θ1
0.250
8°
4°
12°
Note:
1. Dimension “D” does not include molding flash, protrusions or gate burrs.
2. Dimension “E1” 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. 0.62
14/14
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