UP1722PMA5-18 [UPI]

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter;
UP1722PMA5-18
型号: UP1722PMA5-18
厂家: uPI Semiconductor Corp.    uPI Semiconductor Corp.
描述:

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter

文件: 总15页 (文件大小:225K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
uP1722P/Q  
1.5MHz, 1.3A, High-Efficiency  
Synchronous-Rectified Buck Converter  
Features  
General Description  
The uP1722 is a high efficiency synchronous-rectified buck  
converter with internal power switches. Fixed 1.5MHz PWM  
operation allows possible smallest output ripple and  
external component size. With high conversion efficiency  
and small package, the uP1722 is ideally suitable for  
portable devices and USB/PCIE-based interface cards  
where PCB area is especially concerned.  
†
†
†
2.6V to 5.5V Input Voltge ge  
1.3A Peak Output Current  
Accurate Reference ith +/- 2% Accuracy  
„ 0.6V (uP17
„ 0.5V (uP1722Q)  
†
†
†
Up to 95% Cnsion Efficiency  
Typical Quscent Current: 60uA  
With internal low RDS(ON) switches, the uP1722 is capable  
of delivering 1.3A peak output current over a wide input  
voltage range from 2.6V to 5.5V. The output voltage is  
adjustable from 0.6V/0.5V (uP1722P/uP1722Q) to VIN by  
a voltage divider. Other features include internal soft-start,  
chip enable, under-voltage, over-temperature and over-  
current protections. The uP1722 is available in space-saving  
WDFN2x2-6L, TSOT23-5L and SOT23-5L packages with  
fixed or adjustable output voltage options.  
Integrated Low DS(ON) Upper and Lower  
MOSFitches: 300mand 250mΩ  
†
†
†
†
†
†
CurreodPWM Operation  
Fd Frequency: 1.5MHz  
imum Duty Cycle for Lowest Dropout  
Soft-Start  
Under-Voltage Protection  
Ordering Information  
Ovr-Temperature and Over-Current Protection  
Order Number  
uP1722PMT5-XX  
uP1722QMT5-XX  
uP1722PMA5-XX  
uP1722QMA5-XX  
Package  
TopMarking  
N45PXX  
N45QXX  
N45PXX  
N45QX
Space-Saving WDFN2x2-6L, TSOT23-5L and  
SOT23-5L packages  
TSOT23-5L  
†
†
RoHS Compliant and Halogen Free  
SOT23-5L  
Applications  
Battery-Powered Portable Devices  
uP1722PDE6-00 WDFN2x2-6L  
„ MP3 Players  
XX: Output Voltage  
00: adjustable  
„ Digital Still Cameras  
10: 1.0V; 12: 1.2V; 15: 1.5V; 18: 1V;  
25: 2.5V; 33: 3.3V  
„ Wireless and DSL Modems  
„ Personal Information Appliances  
„ Cellular Telephones  
Status:  
In Production: uP1722PMA5-00, uP1722PMT5-00  
Others: Please check the smple/production availability  
with uPI representatives.  
†
†
†
802.11 WLAN Power Supplies  
FPGA/ASIC Power Supplies  
Note:  
Dynamically Adjustable Power Supply for  
CDMA/WCSMA Power Amplifiers  
(1) Please check the roduction availability with  
uPI representatives.  
(2) uPI products are compatwith the current IPC/JEDEC  
J-STD-020 requiremnt. They are halogen-free, RoHS  
compliant and 100% mattn (Sn) plating that are suitable  
for use in SnPb or Pb-free sldering processes.  
†
USB-Based xDSL Modems and Other Network  
Interface Cards  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
1
uP1722P/Q  
Pin Configuration  
EN  
GND  
LX  
1
2
3
5
4
FB  
VIN  
GND  
EN  
1
2
3
5
4
LX  
FB  
NC  
EN  
FB  
1
2
3
6
5
G
X  
GN
VIN  
VIN  
(T)SOT23-5L  
(T)SOT23-5L  
FN2x2-6L  
Typical pplication Circuit  
L
VIN  
VOUT  
VIN  
LX  
C1  
R
COUT  
EN  
VOUT  
CIN  
R1  
GND  
VIN  
VOUT  
CIN  
L
COUT  
C1  
R1  
R2  
3.3V  
1V  
4.7uF  
4.7uF  
2.2uH  
10
0uF  
180pF  
10K  
6.8K  
3.3V  
1.2V  
2.2H  
120pF  
10K  
10K  
3.3V  
5V  
1.8V  
1V  
4.7uF  
4.7uF  
4.7uF  
uF  
2.2u
H  
2.2uH  
10uF  
10uF  
10uF  
10uF  
47pF  
180pF  
120pF  
47pF  
10K  
10K  
10K  
10K  
20K  
6.8K  
10K  
20K  
5V  
1.2V  
1.8V  
5V  
5V  
3.3V  
4.7uF  
2.2uH  
10uF  
27pF  
15K  
68K  
2
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Functional Block Diagram  
VIN  
Current  
Sense  
Slope  
Compensation  
Current Limit  
Detector  
VREF  
Control Logic  
r  
LX  
FB  
Under  
Voltage  
Protection  
OSC &  
Shutdown  
Control  
For Fixed  
VOUT Only  
EN  
GND  
Functional Pin Description  
Pin No.  
PMT/PMA QMT/QMA  
Pin  
Name  
Pin Function  
PDE  
2
Chip Enable (ive High). Logic low shuts down the converter.  
1
2
3
3
2
5
EN  
GND  
LX  
Groun. Tthe pin directly to the cathode terminal of CIN, COUT and  
ground plane wh the lowest impedance.  
5
4
Internal itches Output. Connect this pin to the output inductor.  
upply Input. Input voltage that supplies current to the output  
nd powers the internal control circuit. Bypass input voltage with  
m 4.7uF X5R or X7R ceramic capacitor.  
4
1
3
VIN  
Switcher Feedback Voltage. This pin is the inverting input of the error  
plifier. VOUT senses the switcher output through an external resistor  
dder network. For the fixed voltage version, connect this pin to the  
utput voltage.  
5
4
6
1
FB  
NC  
Not Internally Connected.  
--  
--  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
3
uP1722P/Q  
Functional Description  
The uP1722 is a high efficiency synchronous-rectified buck current to ramp up linearly. The switch remains on until  
converter with internal power switches. Fixed 1.5MHz PWM either the current-limit is trippethe PWM comparator  
operation allows possible smallest output ripple and turns off the switch for regulating outpoltage. The upper  
external component size. With high conversion efficiency switch current is sensed, spe compensated and  
and small package, the uP1722 is ideally suitable for compared with the error amplifr oOMPto determine  
portable devices and USB/PCIE-based interface cards the adequate duty cycle. he pin senses output  
where PCB area is especially concerned.  
feedback voltage from an externaistive divider.  
With internal low RDS(ON) switches, the uP1722 is capable When the load current incrses, it causes a slight  
of delivering 1.3A peak output current over a wide input decrease in the feedvoltage relative to the 0.6V/0.5V  
voltage range from 2.6V to 5.5V. The output voltage is reference, which in turn cathe error amplifier output  
adjustable from 0.6V/0.5V to VIN by a voltage divider. Other voltage to increantil the average inductor current  
features include internal soft-start, chip enable, under- matches the new oad cunt.  
voltage, over-temperature and over-current protections. The  
Low Dropout Mo
uP1722 is available in space-saving WDFN2x2-6L, TSOT23-  
The uP1722 ases duty cycle to maintain output voltage  
5L and SOT23-5L packages, in an adjustable version and  
within its rion as the supply input drops gradually in  
fixed output voltages.  
the battery-ereapplications. The uP1722 operates with  
100% y cycle and enters low dropout mode as the supply  
Input Supply Voltage, VIN  
VIN pin provides power for the internal control circuit and inpues the output voltage. This maximizes the  
supplies current to the output voltage. The supply voltage batt
range is from 2.6V to 5.5V. A power on reset (POR)  
Current Lmit Function  
continuously monitors the input supply voltage. The POR  
The 722 continuously monitors the inductor current for  
level is typically 2.5V at VIN rising.  
current limit by sensing the voltage drop across the upper  
The uP1722 draws pulsed current with sharp edges each  
swh when it turns on. When the inductor current is higher  
time the upper switch turns on, resulting in voltage ripps  
than current limit threshold (1.5Atypical), the current limit  
and spikes at supply input. A minimum 1uF cermic  
fction activates and forces the upper switch turning off to  
capacitor with shortest PCB trace is highly recommded  
limit inductor current cycle by cycle. If the load continuously  
for bypassing the supply input.  
demands more current than what the uP1722 could provide,  
Chip Enable/Disable and Soft Start  
the uP1722 can not regulate the output voltage. Eventually  
under voltage protection will be triggered and shuts down  
the uP1722 if VFB is too low.  
Pulling EN pin lower than 0.4V shuts down 2  
and reduces its quiescent current lower than 1the  
shutdown mode, both upper and lowswitches are turned Under Voltage Protection  
off.  
Undervoltage Protection is triggered if the output voltage is  
Pulling EN pin higher than 1.5V enas the u1722 and lower than 17% of its target level and shuts down uP1722.  
initiates the soft start cycle. The uP1722 lts the in-rush The uP1722 can only be reset by POR of VIN or toggling  
current at start-up. This prevents unwanted shutdown the EN pin.  
otherwise may be triggered voltage drop due to large  
inrush current.  
Output Voltage Setting and Feedback Network  
The output voltage can be set from VREF to VIN by a voltage  
divider as:  
PWM Operation  
The uP1722 adopts mpensated, current mode  
PWM control capable of aving 100% duty cycle.During  
normal operation, the uP1722 erates at PWM mode to  
regulate output voltage transferring the power to the  
output voltage cycle by ycle at a constant 1.5MHz  
frequency. The uP17turs on the upper switch at each  
rising edge of the internal oscillator allowing the inductor  
R1+ R2  
VOUT  
=
× VREF  
R1  
The internal VREF is 0.6V/0.5 with 2.0% accuracy. In real  
applications, a 22pF feedforward ceramic capacitor is  
recommended in parallel with R2 for better transient  
response. The feedforward is internally implemented for  
the fixed voltage versions.  
4
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Absolute Maximum Rating  
(Note 1)  
Supply Input Voltage, VIN --------------------------------------------------------------------------------------------- -0.3V to +6V  
LX Pin Voltage  
DC ------------------------------------------------------------------------------------------------------------------------------ -V to +(VIN +0.3V)  
< 30ns -------------------------------------------------------------------------------------------------------------------------- -3.5V to +7V  
Other Pins ---------------------------------------------------------------------------------------------------------------------- -0.3V to +6V  
StorageTemperature Range ----------------------------------------------------------------------------------------- -65OC to +150OC  
JunctionTemperature -------------------------------------------------------------------------------------------------------------------------------- 150OC  
LeadTemperature (Soldering, 10 sec) ------------------------------------------------------------------------------------------------------ 260OC  
ESD Rating (Note 2)  
HBM (Human Body Mode) --------------------------------------------------------------------------------------------------------------- 2kV  
MM (Machine Mode) -------------------------------------------------------------------------------------------------------------------- 200V  
Thermal Information  
Package Thermal Resistance (Note 3)  
(T)SOT23-5LθJA --------------------------------------------------------------------------------------------------------------- 250OC/W  
(T)SOT23-5LθJC ----------------------------------------------------------------------------------------------------------------- 100OC/W  
WDFN2x2-6L θJA ------------------------------------------------------------------------------------------------------------------- 155OC/W  
WDFN2x2-6L θJC -------------------------------------------------------------------------------------------------------------- 20OC/W  
PowerDissipation, PD @ TA = 25OC  
(T)SOT23-5L ---------------------------------------------------------------------------------------------------------------------------- 0.4W  
WDFN2x2-6L------------------------------------------------------------------------------------------------------------------------------------ 0.6W  
Recommended Operation Conditions  
(Note 4)  
Operating Junction Temperature Range --------------------------------------------------------------------- -40OC to +125OC  
OperatingAmbientTemperature Range -------------------------------------------------------------------------------- -40OC to +85OC  
Supply Input Voltage, VIN --------------------------------------------------------------------------------------------------- +2.6V to +5.5V  
Electrical Characteristics  
(VIN = 3.3V, TA = 25OC, unless otherwise specifie
Parameter  
Symb
est Conditions  
Min  
Typ  
Max Units  
Supply Current  
VIN risg  
2.6  
--  
--  
--  
--  
V
2
Input Under Voltage Lockout  
Quiescent Current  
VUVLO  
IN falling  
VEN = 3.3V, VFB > VREF, IOUT = 0mA, (No  
switching)  
IQ  
--  
--  
60  
100  
1
uA  
uA  
Shutdown Current  
Reference  
ISHDN VEN = 0V  
0.01  
Soft-Start Time  
Guaranteed by design  
--  
250  
--  
us  
V
uP1722P IOUT = 10mA  
uP1722Q IOUT = 10mA  
0.588 0.6 0.612  
0.490 0.5 0.510  
Reference Voltage  
VREF  
Output Voltage Li
Regulation  
VOUT VIN = 2.6V to 5.5V  
VOUT IOUT = 10mA to 1A  
--  
--  
0.04  
0.5  
0.4  
--  
%/V  
%
Output Voltage Load  
Regulation  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
5
uP1722P/Q  
Electrical Characteristics  
Parameter  
Oscillator  
Symbol  
Test Conditions  
Guaranteed by design  
VIN = VOUT ; VFB = 0.45V  
Min  
Typ Max  
Units  
COMP to Current Sense  
Transconductance  
--  
2
--  
A/V  
Switching Frequency Range  
Maximum Duty Cycle  
Power Switches  
fOSC  
DC  
1.25  
00  
--  
1.75  
--  
MHz  
%
RDS(ON) of Upper Switch  
RDS(ON) of Lower Switch  
Logic Input  
RP_FET  
RN_FET  
VIN = 3.3V, ILX = 100mA  
VIN = 3.3V, ILX = -100mA  
-  
--  
300  
250  
--  
--  
mΩ  
mΩ  
EN Logic Low Threshold  
EN Logic High Threshold  
Protection  
VIL  
VIH  
VIN = 2.6V to 5.5V, Shutdown  
VIN = 2.6V to 5.5V, Enable  
--  
--  
--  
0.4  
--  
V
V
1.5  
FB Under Voltage  
Protection  
FB_UVP FB Falling  
--  
1.3  
--  
0.133  
1.5  
--  
--  
--  
V
A
Over Current Protection  
IOUT_OCP  
Thermal Shutdwon  
Temperature  
TSHDN  
Guaranteeby den  
Guaranteed by dgn  
150  
OC  
Thermal Shutdown  
Hysteresis  
TSHDN  
--  
20  
--  
OC  
Note 1. Stresses listed as the above Absolute Maximum Rngs may cause permanent damage to the device.  
These are for stress ratings. Functional opeion of the device at these or any other conditions beyond those  
indicated in the operational sections of the specations is not implied. Exposure to absolute maximum  
rating conditions for extended periods memain possibility to affect device reliability.  
Note 2. Devices are ESDsensitive. Handling recommended.  
Note 3. θJA is measured in the natural convect= 25OC on a low effective thermal conductivity test board of  
JEDEC 51-3 thermal measuret standard.  
Note 4. The device is not guaranted to functioutside its operating conditions.  
6
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Typical Operation Characteristics  
Power On from EN  
Power Off from EN  
EN 5V/Div  
EN 5V/Div  
LX 5V/Div  
LX 5V/Div  
VOUT 1V
VOUT 1V/Div  
ILX 1A/Div  
IL/Div  
Time (100us/Div)  
Time (2us/Div)  
VIN= 5V, VOUT = 1.2V, IOUT = 1A  
VIN= V, VOUT = 1.2V, IOUT = 1A  
Load Transient  
Switching Frequency vs. Input Voltage  
1.54  
1.53  
.52  
1.51  
1.50  
1.49  
1.48  
LX 5V/Div  
ILX 500mA/Div  
VOUT 100mV/Div  
2.6  
3.1  
3.6  
4.1  
4.6  
5.1  
5.6  
Time (100us/Div)  
VIN= 5V, VOUT = 1.2V, IOUT 0A~ 1A  
Input Voltage (V)  
IOUT = 500mA  
Line Regulon  
Load Regulation  
1.26  
1.24  
1.22  
1.2  
1.242  
1.232  
1.222  
1.212  
1.202  
1.192  
1.182  
1.172  
1.162  
1.152  
1.18  
1.16  
1.14  
2.6  
3.1  
3.6  
4.1  
4.6  
5.1  
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
VIN (V)  
IOUT (A)  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
7
uP1722P/Q  
Typical Operation Characteristics  
Efficiency vs. Output Current  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VOUT = 3.3V  
VOUT = 1.2V  
0.01  
0.1  
1
IOUT (A)  
8
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Application Information  
Output Inductor Selection  
Input Capacitor Selection  
The uP1722 draws pulsed currewith sharp edges from  
the input capacitor resulting in ripple anoise at the input  
supply voltage. A minimum 4.X5R or X7R ceramic  
capacitor is highly recommend the pulsed current.  
The input capacitor should be plas near the device as  
possible to avoid the stray ductanalong the connection  
trace. Y5V dielectrics, asidom losing most of their  
capacitance over temature, they also become resistive  
at high frequencies. This es their ability to filter out  
high frequency noi
Output inductor selection is usually based on the  
considerations of inductance, rated current value, size  
requirements andDC resistance (DCR).  
The inductance is chosen based on the desired ripple  
current. Large value inductors result in lower ripple currents  
and small value inductors result in higher ripple currents.  
Higher VIN or VOUT also increases the ripple current as shown  
in the equation below.Areasonable starting point for setting  
ripple current is IL = 390mA (30% of 1.3A). For most  
applications, the value of the inductor will fall in the range  
of 1uH to 10uH.  
The capacitor witlow ES(equivalent series resistance)  
provides the smarop voltage to stabilize the input voltage  
during the transient loing. For input capacitor selection,  
the ceramicitors larger than 4.7uF is recommend.  
The capaciust nform to the RMS current requirement.  
The aximuS ripple current is calculated as:  
VOUT  
VIN  
1
IL =  
× VOUT × (1−  
)
fOSC × LOUT  
Maximum current ratings of the inductor are generally  
specified in two methods: permissible DC current and  
saturation current. PermissibleDC current is the allowable  
DC current that causes 40OC temperature raise. The  
saturation current is the allowable current that causes 10%  
inductance loss. Make sure that the inductor will t  
saturate over the operation conditions including temperat
range, input voltage range, and maximum output current.
possible, choose an inductor with rated current higher than  
1.0A so that it will not saturate even under current imit  
condition.  
V
OUT ×(V VOUT )  
IN  
IIN(RMAX)  
×
V
IN  
This formula has a maximum at VIN = 2xVOUT, where IIN(RMS)  
= IOUT/2. This simple worst-case condition is commonly  
used for design because even significant deviations do not  
or much relief. Note that the capacitor manufacturer’s  
ripple current ratings are often based on 2000 hours of life.  
is makes it advisable to further derate the capacitor, or  
choose a capacitor rated at a higher temperature than  
required. Always consult the manufacturer if there is any  
question.  
The size requirements refer to the area and heigh
requirement for a particular design. For better cy,  
choose a low DC resistance inductor. DCly  
inversely proportional to size.  
Output Capacitor Selection  
The uP1722 is specifically design to operate with minimum  
4.7uF X5R or X7R ceramic capacitor. The value can be  
increased to improve load/line transient performance. Y5V  
dielectrics, aside from losing most of their capacitance over  
temperature, they also become resistive at high  
frequencies. This reduces their ability to filter out high  
frequency noise.  
Different core materials and shapes ill change the size/  
current and price/current relationshof an indur. Toroid  
or shielded pot cores in ferrite or pemalloy marials are  
small and don’t radiate much energy, gerally cost  
more than powdered iron core inductors with similar electrical  
characteristics. The choice which style inductor to use  
often depends on the price vs. srequirements and any  
radiated field/EMI requirets.  
The ESR of the output capacitor determines the output  
ripple voltage and the initial voltage drop following a high  
slew rate load transient edge. The output ripple voltage  
can be calculated as:  
1
VOUT = ∆IC ×(ESR +  
)
8× fOSC × COUT  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
9
uP1722P/Q  
Application Information  
where fOSC = operating frequency, COUT = output capacitance It is helpful to analysis the power dissipation of uP1722 for  
and IC = IL = ripple current in the inductor.  
avoiding the uP1722 from exceeg the maximum junction  
temperature. In typical applications, e conduction loss  
dominates the total power loss iuP1722. The conduction  
loss has its maximum at high uty, low input voltage,  
and high ambient temperaturs.  
The ceramic capacitor with low ESR value provides the low  
output ripple and low size profile. Connect a 4.7uF ceramic  
capacitor at output terminal for good performance and place  
the input and output capacitors as close as possible to the  
device.  
Consider the uP1722 in drout mode operation at an input  
voltage of 2.6V, a load curren400mA and an ambient  
temperature of 75OC. on-resistance of the upper switch  
is about 500mat this coion. Therefore the power  
dissipation PD is:  
Using Ceramic Capacitors  
Higher value, lower cost ceramic capacitors are now  
available in smaller case sizes. Their high ripple current,  
high voltage rating and low ESR make them ideal for  
switching regulator applications. Because the uP1722  
control loop does not depend on the output capacitor’s ESR  
PD = IO2 UT × RDS) = 80mW  
This results 50 x 0.08 = 20OC temperature raise at  
junction. ctn temperature is 95OC and is lower  
than its maum ting 125OC.  
for stable operation, ceramic capacitors can be used to  
achieve very low output ripple and small circuit size.  
However, care must be taken when these 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 instabilityt  
worst, a sudden inrush of current through the long wire
can potentially cause a voltage spike at VIN, large enough  
to damage the part.  
CheckTransient Response  
The loop response can be checked by looking at  
the lsient response. Switching regulators take  
veral cycles to respond to a step in load current. When  
a loatep occurs, VOUT immediately shifts by an amount  
equal to (IOUT x ESR), where ESR is the effective series  
retance of COUT. IOUT also begins to discharge or charge  
COUT, which generates a feedback error signal. The regulator  
p then acts to return VOUT to its steady state value.  
During this recovery time, VOUT can be monitored for  
overshoot or ringing that would indicate a stability problem.  
When choosing the input and output ceramic capaors,  
choose the X5R or X7R dielectric formulations. The
dielectrics have the best temperature and tage  
characteristics of all the ceramics for a gived  
size.  
Thermal Considerations  
In most applications, the uP1722 ds not disste much  
heat due to its high efficiency. Howeer, overteperature  
protection is implemented in case of ons where  
the uP1722 is operating at high ambient temperature. If  
the junction temperature reaes approximately 150OC, the  
OTP turns both power switches aet the LX node become  
high impedance. The uPrestores normal operation  
if the junction temperas to 130OC.  
10  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Application Information  
Examples of 2-layer PCB layout are shown in Figure1, 2  
and 3 for different part number, pectively.  
PCB Layout Considerations  
High switching frequencies and relatively large peak  
currents make the PCB layout a very important part of  
switching mode power supply design. Good design  
minimizes excessive EMI on the feedback paths and voltage  
gradients in the ground plane, both of which can result in  
instability or regulation errors. Follow the PCB layout  
guidelines for optimal performance of uP1722.  
Via to VIN  
FB  
1
2
3
5
4
Via to GND  
Via to VOUT  
c
GND  
LX  
1 For the main current paths, keep their traces short,  
direct and wide.  
Via to VIN  
VIN  
2 Put the input/output capacitors as close as possible to  
the device pins.  
Via for GND  
3 LX node is with high frequency voltage swing and should  
be kept in small area. Keep analog components away  
from LX node to prevent stray capacitive noise pick-up.  
VOUT  
Via to V
Fig1. Top Layer Layout Example for uP1722PMT5  
and uP1722PMA5  
4 Connect feedback network behind the output capacitors.  
Place the feedback components near the uP1722 and  
keep the loop area small. .  
VIN  
5 A ground plane is preferred, but if not available, keep  
the signal and power grounds sepregated with smll  
signal components returning to theGNDpin at one poin
They should not share the high current path of CIN or  
VIN  
GND  
EN  
LX  
FB  
1
2
3
5
4
COUT  
.
6 Flood all unused areas on all layers with coper.  
Flooding with copper will reduce the temperature e  
of power components. These copper areas should be  
connected to VIN orGND.  
Via to VIN  
VOUT  
Figure 2. Top Layer Layout Example for uP1722QMT5  
and uP1722QMA5  
6
5
4
NC  
EN  
1
2
3
FB  
GND  
GND  
LX  
VIN  
VIN  
VOUT  
Figure 3. Top Layer Layout Example for uP1722PDE6  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
11  
uP1722P/Q  
Package Information  
TSOT23-5L Package  
2.80 - 3.02  
0.95 BSC  
0.30 - 0.51  
1.00 MAX  
0.00
1.90 BSC  
Note  
1.Package Outline UnitDescription:  
BSC: Basic. Represents theoretical exact dimensior dimension target  
MIN: Minimum dimension specified.  
MAX: Maximum dimension specified.  
REF: Reference. Represents dimension for use only. This value is not a device specification.  
TYP. Typical. Provided as a general value. Tis not a device specification.  
2.Dimensions in Millimeters.  
3.Drawing not to scale.  
4.These dimensions do not include mold flash protrusions. Mold flash or protrusions shall not exceed 0.15mm.  
12  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
Package Information  
SOT23-5L Package  
2.80 - 3.00  
0.95 BSC  
0.30 - 0.50  
0.00 - 0
1.90 BSC  
Note  
1.Package Outline UnitDescription:  
BSC: Basic. Represents theoretical exact dimensior dimension target  
MIN: Minimum dimension specified.  
MAX: Maximum dimension specified.  
REF: Reference. Represents dimension for use only. This value is not a device specification.  
TYP. Typical. Provided as a general value. Tis not a device specification.  
2.Dimensions in Millimeters.  
3.Drawing not to scale.  
4.These dimensions do not include mold flash protrusions. Mold flash or protrusions shall not exceed 0.15mm.  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
13  
uP1722P/Q  
Package Information  
WDFN2x2-6L Package  
1.90 - 2.10  
1.15 - 1.65  
0.30 - 0.40  
4
6
3
1
0.65 BSC  
0.20 - 0.35  
0.70 - 0.80  
0.20 REF  
0.00 - 005  
Note  
1.Package Outline UnitDescription:  
BSC: Basic. Represents theoretical exact dimensior dimension target  
MIN: Minimum dimension specified.  
MAX: Maximum dimension specified.  
REF: Reference. Represents dimension for use only. This value is not a device specification.  
TYP. Typical. Provided as a general value. Tis not a device specification.  
2.Dimensions in Millimeters.  
3.Drawing not to scale.  
4.These dimensions do not include mold flash protrusions. Mold flash or protrusions shall not exceed 0.15mm.  
14  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
uP1722P/Q  
ImportantNotice  
uPI and its subsidiaries reserve the right to make corrections, modifications, enhancements, improvements, and other cges to its products  
and services at any time and to discontinue any product or service without notice. Customers should obtailatest relevant information  
before placing orders and should verify that such information is current and complete.  
uPI products are sold subject to the terms and conditions of sale supplied at the time of order acknowledmeever, no responsibility  
is assumed by uPI or its subsidiaries for its use; nor for any infringements of patents or other righof third paich may result from its  
use. No license is granted by implication or otherwise under any patent or patent rights of uPI or its bsidiarie
COPYRIGHT (C) 2011, UPI SEMICONDUCTOR CORP.  
uPI Semiconductor Cor
Headquarter  
uPI Semiconductor Corp.  
Sales Branch Office  
9F.,No.5, Taiyuan 1st St. Zubei City,  
Hsinchu Taiwan, R..  
12F-5, No. 408, Ruiguang Rd. NeihuDistrict,  
Taipei Taiwan, R.O.C.  
TEL : 886.3.560.1666 FAX : 886.3.560.1888  
TEL : 886.2.8751.2062 FAX : 886.2.8751.5064  
uP1722P/Q-DS-F0002, Sep. 2016  
www.upi-semi.com  
15  

相关型号:

UP1722PMA5-25

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMA5-33

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-00

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-10

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-12

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-15

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-18

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-25

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722PMT5-33

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722QMA5-00

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722QMA5-10

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI

UP1722QMA5-12

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter
UPI