FP6360-33WDG [FITIPOWER]
1.5MHz, 1A, High-Efficiency PWM Synchronous Step-Down Converter;
| 型号： | FP6360-33WDG |
| 厂家： | 
Fitipower |
| 描述： | 1.5MHz, 1A, High-Efficiency PWM Synchronous Step-Down Converter |
| 文件： | 总11页 (文件大小：639K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
fitipower integrated technology lnc.
FP6360
1.5MHz, 1A, High-Efficiency PWM
Synchronous Step-Down Converter
Description
Features
The FP6360 is a high efficiency, low-noise, DC-DC
step-down pulse width modulated (PWM) converter.
The 100% duty cycle feature provides low dropout
operation, extending battery life in portable systems.
The switching frequency can be controlled by the
external resistor.
Synchronous Rectification:
Approach 95% Efficiency
2.5V to 5.5V Input Voltage Range
Real Shutdown Isolated Load from Battery
Internal Compensation without External
Capacitors and Resistors
No Schottky Diode Required
The internal synchronous switch increases efficiency
and eliminates the need for an external Schottky
Low Dropout Operation: 100% Duty Cycle
Fixed Frequency Operation at 1.5MHz
Very Low Shutdown Current at 0.1µA
RoHS Compliant
diode.
Shutdown mode places the device in
standby, reducing quiescent supply current to less
than 1µA.
The current limit protection and on-chip thermal
shutdown features provide protection against any
combination of overload or ambient temperature.
Applications
Cellular Phone
Handheld Instrument
Wireless LAN
MP3 Portable Audio Player
Battery Operated Device
Pin Assignments
Ordering Information
FP6360□□□□
WD Package TDFN-6 (2mmx2mm)
TR: Tape/Reel
TOP VIEW
G: Green
1
2
3
6
5
4
NC
EN
FB/VOUT
GND
Package Type
WD: TDFN-6 (2mm×2mm)
WQ: TQFN-16 (3mmX3mm)
VIN
LX
Output Voltage
Blank: Adjustable
WQ Package TQFN-16 (3mmX3mm)
TOP VIEW
-10: 1.0V
-12: 1.2V
-15: 1.5V
-16: 1.6V
-18: 1.8V
-25: 2.5V
-33: 3.3V
16
15
14
13
1
2
3
4
12
11
10
9
GND
GND
VIN
VIN
NC
TDFN-6(2mmx2mm) Marking
Product
Code
Product
Code
GND
Part Number
Part Number
GND
FP6360-10WDG
FP6360-12WDG
FP6360-15WDG
FP6360-16WDG
X3=
X4=
X5=
X6=
FP6360-18WDG
FP6360-25WDG
FP6360-33WDG
FP6360WDG
X7=
FB/VOUT
NC
X8=
X9=
Y1=
5
6
7
8
Figure 1. Pin Assignment of FP6360
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FP6360
Typical Application Circuit
L=2.2μH
VIN
2.5V to 5.5V
3
2
1
4
VOUT
COUT=10μF
VIN
LX
CIN=4.7μF
FP6360
6
5
VOUT
EN
NC
GND
Figure 2. Typical application circuit of fixed voltage version
L=2.2μH
VIN
2.5V to 5.5V
CIN=4.7μF
3
2
1
4
VIN
LX
FB
VOUT
C1
COUT=10μF
FP6360
R1
R2
6
5
EN
NC
GND
Figure 3. Typical application circuit of adjustable voltage version
Functional Pin Description
Pin Name
Pin Function
NC
EN
No Connection (Floating or connect to GND).
Enable Pin. Logic high enables the converter, and logic low forces the device into shutdown mode to reduce the
supply current to less than 1µA
GND
LX
Ground
Inductor connection to the drains of the internal power MOSFETs
Supply Voltage Input. Input range is from 2.5V to 5.5V. Bypass with a 10µF capacitor
Feedback Input/Output Voltage Pin.
VIN
FB/VOUT
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FP6360
Block Diagram
EN
VIN
Enable
Control
UVLO
Slope Compensation
Soft
Start
Control
and
Driver
Logic
X
1
Control Logic
Current Limit
Logic
COMP
FB/VOUT
LX
EA
Mode
Compensation
Control
Oscillator
VREF
GND
Figure 4. Block Diagram of FP6360
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FP6360
Absolute Maximum Ratings
● VIN to GND ------------------------------------------------------------------------------------------------------ -0.3V to +6V
● LX to GND ------------------------------------------------------------------------------------------------------- -0.3V to (VIN+0.3)
● EN, FB/VOUT to GND ---------------------------------------------------------------------------------------- -0.3V to VIN
● Power Dissipation @25℃, (PD)
+1.25W
+1.54W
TDFN-6 (2mm×2mm) -----------------------------------------------------------------------------
TQFN-16 (3mm×3mm) ---------------------------------------------------------------------------
● Package Thermal Resistance, (θJA)
+80°C/W
+65°C/W
TDFN-6 (2mm×2mm) -----------------------------------------------------------------------------
TQFN-16 (3mm×3mm) ---------------------------------------------------------------------------
● Package Thermal Resistance, (θJC)
TDFN-6 (2mm×2mm) -----------------------------------------------------------------------------
56°C/W
● Maximum Junction Temperature (TJ) --------------------------------------------------------------------- +150°C
● Storage Temperature (TSTG) --------------------------------------------------------------------------------- -65°C to +150°C
● Lead Temperature (Soldering, 10sec.) ------------------------------------------------------------------- +260°C
Note 1：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device.
Recommended Operating Conditions
● Supply Voltage (VIN) ------------------------------------------------------------------------------------------- +2.5V to +5.5V
● Operation Temperature Range (TOPR) --------------------------------------------------------------------- -40°C to +85°C
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FP6360
Electrical Characteristics
(VIN=3.6V, EN=VIN, TA= 25ºC, unless otherwise specified)
Parameter
Operating Input Voltage
Quiescent Current
Symbol
VIN
Conditions
Min.
Typ.
Max.
5.5
70
Unit
2.5
V
VFB=0.63V or VOUT=105%,
IO=0mA
IQ
50
µA
Shutdown Current
ISD
EN=GND
0.1
1
EN High-Level Input Voltage
EN Low-Level Input Voltage
EN Input Leakage Current
VIH
1.3
V
V
VIL
0.4
1
ILKG
EN=GND or VIN
ILX = 100mA
0.01
250
µA
N-Channel MOSFET
On-Resistance
(Note2)
P-Channel MOSFET
On-Resistance
(Note2)
RDS(ON)
300
330
mΩ
mΩ
RDS(ON)
ILX = 100mA
VFB=0.5V
280
Oscillator Frequency
fs
ILIM
1500
1.5
kHz
A
P-Channel Current Limit (Note2)
Under Voltage Lock Out Voltage
UVLO Hysteresis
1.4
UVLO
VHYS
IFB
1.8
V
0.1
V
FB Input Leakage Current
LX Leakage Current
VFB= VIN
0.01
1
1
µA
µA
V
VIN=3.6V, VLX=0V or VLX=3.6V
-1
0.588
-2
Reference Voltage
VREF
0.6
0.612
+2
Output Voltage Accuracy (Fix)
Line Regulation
△ VOUT
△ VLINE
△ VLOAD
%
VIN =VO+0.5V to 5.5V; IO = 10mA
IO = 10mA to 1A
0.05
0.8
%/V
%/A
Load Regulation
TSD
160
20
°C
°C
Thermal Shutdown Temperature
(Note2)
ΔTSD
Hysteresis
Note 2：Guarantee by design.
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FP6360
Typical Performance Curves
100
90
80
70
60
50
40
30
20
10
0
1.250
1.237
1.225
1.212
1.200
1.187
1.175
1.162
1.150
1.138
1.125
VIN=2.8V
VIN=3.6V
VIN=5.0V
VIN=5V
VIN=3.6V
0
100 200 300 400 500 600 700 800 900 1000
0
100 200 300 400 500 600 700 800 900 1000
Load Current (mA)
Output current (mA)
Figure 5. Efficiency vs. Load Current
Figure 6. Output Voltage vs. Output Current
1.60
1.58
1.56
1.54
1.52
1.50
1.48
1.46
1.44
1.42
1.40
0.63
0.62
0.61
0.60
0.59
0.58
0.57
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Junction Temperature (oC)
Junction Temperature (oC)
Figure 7. Reference Voltage vs. Junction Temperature
Figure 8. Frequency vs. Junction Temperature
1.60
1.55
1.50
1.45
1.40
1.35
1.30
VIN=3.6V, VOUT=1.2V, IOUT=300mA
1.25
1.20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 9. Frequency vs. Input Voltage
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FP6360
Typical Performance Curves (Continued)
VIN=3.6V, VOUT=1.2V, IOUT= 50mA to 0.5A
VIN=3.6V, VOUT=1.2V, IOUT= 50mA to 1A
CH1: Output Voltage, AC-Coupled
CH1: Output Voltage, AC-Coupled
CH4: IOUT Current
CH4: IOUT Current
Figure 10. Load Transient Response
Figure 11. Load Transient Response
VIN=5V, VOUT=1.2V, IOUT= 50mA to 1A
VIN=5V, VOUT=1.2V, IOUT= 50mA to 0.5A
CH1: Output Voltage, AC-Coupled
CH1: Output Voltage, AC-Coupled
CH4: IOUT Current
CH4: IOUT Current
Figure 12. Load Transient Response
Figure 13. Load Transient Response
VIN=5V, VOUT=1.2V, IOUT= 1A
VIN=3.6V, VOUT=1.2V, IOUT= 1A
Figure 14. Output Ripple Voltage
Figure 15. Output Ripple Voltage
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Typical Performance Curves (Continued)
VIN=3.6V,VOUT=1.2V,ILOAD= 10mA
FP6360
VIN=3.6V,VOUT=1.2V,ILOAD= 1A
CH1: EN
CH1: EN
CH2: VOUT
CH2: VOUT
CH4: IIN
CH4: IIN
Figure 16. Start-up Waveform
Figure 17. Start-up Waveform
VIN=3.6V, VOUT=1.2V, ILOAD= 1A
CH1: EN
CH2: VOUT
Figure 18. Power Off from EN
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FP6360
Application Information
Inductor Selection
Checking Transient Response
A 2.2µH to 4.7µH is recommended for general used.
The value of inductor depends on the operating
The regulator loop response can be checked by
looking at the load transient response. Switching
regulators take several cycles to respond to a step
in load current. When a load step occurs, VOUT will
be shifted immediately by an amount equal to
(ΔꢈLOAD • ꢐSR), where ꢐSR is the eꢅꢅective series
frequency.
Higher frequency allows smaller
inductor and capacitor but increases internal
switching loss. Two inductor parameters should be
considered, current rating and DCR. The inductor
with the lowest DCR is chosen for the highest
efficiency.
resistance of COUT
.
ΔꢈLOAD will also begin to charge
or discharge COUT, which generates a feedback
error signal. Then the regulator loop will act to
return VOUT to its steady state value. During this
recovery time, VOUT can be monitored for overshoot
or ringing that will indicate the stability problem.
The inductor value can be calculated as:
ꢂꢃꢄT
ꢅꢆꢇꢈꢀ
ꢂ
ꢃꢄTꢀ
ꢉꢊ
ꢀꢁ
ꢂꢈꢋ
ꢇIL: inductor ripple current, which is defined as:
The discharged bypass capacitors are effectively
put in parallel with COUT, causing a rapidly drop in
V
IL ꢀ VO [(1 O )/(L * f)]
VOUT
.
No regulator can deliver enough current to
(General Setting)
VI
prevent this problem if the load switch resistance is
low and it is driven quickly. The only solution is to
limit the rise time of the switch drive, so that the load
rise time will be limited to approximately (ꢏ5 •
CLOAD).
ꢀꢀꢀ 0.1 2 IOMAX
The inductor should be rated for the maximum output
current (IO-MAX) plus the inductor ripple current (ꢇꢈL) to
avoid saturation. The maximum inductor current
(IL-MAX) is given by:
Current Mode PWM Control
ꢇꢈꢀ
ꢈꢀꢊMAꢌꢍꢈꢃꢊMAꢌ
ꢎ
Slope compensated current mode PWM control
provides stable switching, cycle-by-cycle current
limit for superior load, line response, protection of
the internal main switch and synchronous rectifier.
The FP6360 switches at a constant frequency
(1.5MHz) and regulates the output voltage. During
each cycle, the PWM comparator modulates the
power transferred to the load by changing the
inductor peak current based on the feedback error
voltage. During normal operation, the main switch
is turned on for a certain time to ramp the inductor
current at each rising edge of the internal oscillator,
and switched off when the peak inductor current is
above the error voltage. When the main switch is
off, the synchronous rectifier will be turned on
immediately and stay on until next cycle starts.
ꢏ
Capacitor Selection
The small size of ceramic capacitors are ideal for
FP6360 applications. X5R and X7R types are
recommended because they retain their capacitance
over wider voltage and temperature ranges than
other types, such as Y5V or Z5U. A 4.7μF input
capacitor and a ꢉ0μF output capacitor are suꢅꢅicient
for most FP6360 applications.
When selecting an output capacitor, consider the
output ripple voltage and the ripple current. The
ESR of capacitor is a major factor to the output
ripple. For the best performance, a low ESR output
capacitor is required. The ripple voltage is given
by:
ꢉ
Dropout Operation
ꢀ
ꢇꢂꢃꢍꢇꢈꢀ ꢐSRꢎ
ꢑꢆꢅꢆꢒꢃ
The FP6360 allows the main switch to remain on for
more than one switching cycle, and increases the
duty cycle while the input voltage is dropping close
Output Voltage Programming (Adjustable Voltage
Version)
to the output voltage.
When the duty cycle
The output voltage of FP6360 is set by the resistor
divider according to the following formula:
reaches 100%, the main switch will be held on
continuously to deliver current to the output up to
the MOSFET current limit. Then the output voltage
will be the input voltage minus the voltage drop
across the main switch and the inductor.
Rꢉ
ꢀ
ꢂꢃꢄTꢍꢂFꢓꢆ ꢉꢎ
Rꢏ
R1 is the upper resistor of the voltage divider. For
transient response reasons, a small feed-forward
capacitor (CF) is required in parallel to the upper
feedback resistor, and 33pF is recommended.
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FP6360
Outline Information
TDFN-6 2mm×2mm Package (Unit: mm)
DIMENSION IN MILLIMETER
SYMBOLS
UNIT
MIN
0.70
0.00
0.19
1.95
1.95
0.20
0.25
0.60
1.15
0.55
MAX
0.80
0.05
0.22
2.05
2.05
0.40
0.35
0.70
1.65
1.05
A
A1
A2
D
E
a
b
e
D1
E1
Carrier Dimensions
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FP6360
Outline Information (Continued)
TQFN-16 3mmx3mm Package (Unit: mm)
DIMENSION IN MILLIMETER
SYMBOLS
UNIT
MIN
0.70
0.00
0.19
2.90
2.90
0.35
0.18
0.45
1.50
1.50
MAX
0.80
0.05
0.30
3.10
3.10
0.45
0.30
0.55
1.80
1.80
A
A1
C
E
D
L
b
e
E2
D2
Carrier Dimensions
Life Support Policy
Fitipower’s products are not authorized ꢅor use as critical components in liꢅe support devices or other medical systems
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