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TM
MP2303
3A, 28V, 340KHz Synchronous Rectified Step-Down Converter
The Future of Analog IC Technology
TM
INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
DESCRIPTION
The MP2303 is a monolithic synchronous buck regulator. The device integrates power MOSFETS that provide 3A continuous load current over a wide operating input voltage of 4.75V to 28V. Current mode control provides fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops to 1A. This device, available in 8-pin SOIC and 3x3 10-pin QFN packages, provides a very compact system solution with minimal reliance on external components.
FEATURES
* * * * * * * * * * * 3A Output Current Wide 4.75V to 28V Operating Input Range Integrated Power MOSFET Switches Output Adjustable from 0.8V to 25V Up to 95% Efficiency Programmable Soft-Start Stable with Low ESR Ceramic Output Capacitors Fixed 340KHz Frequency Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout Thermally Enhanced 8-Pin SOIC and 3x3 QFN10 Packages Distributed Power Systems Pre-Regulator for Linear Regulators Notebook Computers
APPLICATIONS
* * *
EVALUATION BOARD REFERENCE
Board Number EV2303DN-00A Dimensions 2.0"X x 1.5"Y x 0.5"Z
"MPS" and "The Future of Analog IC Technology" are Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
C5 10nF
BS SS
Efficiency vs Load Current
100 90
VIN = 12V
MP2303
SW GND COMP FB
EFFICIENCY (%)
VIN 4.75V-28V
IN
EN
80 70 60
VIN = 24V
C3 3.3nF
VOUT = 5V
0 0.5 1.0 1.5 2.0 2.5 3.0
VOUT 5V/3A
50
LOAD CURRENT (A)
MP2303_TAC01
MP2303-EC01
MP2303 Rev. 0.92 5/2/2006
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
PACKAGE REFERENCE
TOP VIEW
TOP VIEW
IN
BS IN SW GND 1 2 3 4 8 7 6 5 SS EN COMP FB
1 2 3 4 5
10 9 8 7 6
SS BS EN COMP FB
SW GND GND GND
MP2303_PD01_SOIC8N
EXPOSED PAD ON BACKSIDE
MP2303_PD02_QFN10
Part Number* MP2303DN *
Package SOIC8N (Exposed Pad)
Temperature -40C to +85C
Part Number* MP2303DQ *
Package 3mm x 3mm QFN10
Temperature -40C to +85C
For Tape & Reel, add suffix -Z (eg. MP2303DN-Z) For RoHS compliant packaging, add suffix -LF (eg. MP2303DN-LF-Z)
For Tape & Reel, add suffix -Z (eg. MP2303DQ-Z) For RoHS compliant packaging, add suffix -LF (eg. MP2303DQ-LF-Z)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN .......................-0.3V to +30V Switch Voltage VSW ................. -1V to VIN + 0.3V Boost Voltage VBS ..........VSW - 0.3V to VSW + 6V All Other Pins .................................-0.3V to +6V Junction Temperature ...............................150C Lead Temperature ....................................260C Storage Temperature ............. -65C to +150C
Recommended Operating Conditions
(2)
Input Voltage VIN ............................ 4.75V to 28V Output Voltage VOUT ........................ 0.8V to 25V Ambient Operating Temperature ... -40C to +85C
Thermal Resistance
(3)
SOIC8N .................................. 50 ...... 10... C/W 3x3 QFN10 ............................. 50 ...... 12... C/W
Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating conditions. 3) Measured on approximately 1" square of 1 oz copper.
JA
JC
ELECTRICAL CHARACTERISTICS (4)
VIN = 12V, TA = +25C, unless otherwise noted.
Parameter Shutdown Supply Current Supply Current Feedback Voltage OVP Threshold Voltage Error Amplifier Voltage Gain Error Amplifier Transconductance VFB Symbol Condition VEN = 0V VEN = 2.7V, VFB = 1.0V 4.75V VIN 28V, TA = +25C -40C TA +85C AEA GEA IC = 10A 550 0.780 0.772 0.90 0.95 400 820 Min Typ (4) 0.3 1.3 0.800 Max 3.0 1.5 0.820 0.828 1.00 1100 Units A mA V V V V/V A/V
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
ELECTRICAL CHARACTERISTICS (4) (continued)
VIN = 12V, TA = +25C, unless otherwise noted.
Parameter High-Side Switch-On Resistance Low-Side Switch-On Resistance High-Side Switch Leakage Current Upper-Switch Current Limit Lower-Switch Current Limit COMP to Current Sense Transconductance Oscillation Frequency Short Circuit Oscillation Frequency Maximum Duty Cycle Minimum On-Time EN Shutdown Threshold Voltage EN Shutdown Threshold Voltage Hysteresis EN Lockout Threshold Voltage EN Lockout Hysteresis Input Under Voltage Lockout Threshold Input Under Voltage Lockout Threshold Hysterisis Soft-Start Current Thermal Shutdown UVLO VIN rising, TA = +25C -40C TA +85C 3.8 3.5 210 VSS = 0V 6 160 Symbol Condition RDS(ON)1 RDS(ON)2 VEN = 0V, VSW = 0V From Drain to Source GCS Fosc1 Fosc2 DMAX TA = +25C -40C TA +85C VFB = 0V VFB = 0.7V VEN Rising 1.1 300 270 110 90 220 1.5 220 2.2 -40C TA +85C 2.1 210 4.05 4.30 4.70 2.5 2.7 2.8 Min Typ (4) 125 125 0 6.3 1.25 9 340 380 400 Max Units m m A A A A/V KHz KHz KHz % ns V mV V V mV V V mV A C
10
4.3
2.0
Note: 4) 100% production test at +25C. Specifications over the temperature range are guaranteed by design and characterization.
MP2303 Rev. 0.92 5/2/2006
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
PIN FUNCTIONS
3x3 SOIC8N QFN10 Pin # Pin # 1 9 Name Description High-Side Gate Drive Boost Input. BS supplies the drive for the high-side NChannel MOSFET switch. Connect a 0.01F or greater capacitor from SW to BS to power the high side switch. Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.75V to 28V power source. Bypass IN to GND with a IN suitably large capacitor to eliminate noise on the input to the IC. See Input Capacitor. Power Switching Output. SW is the switching node that supplies power to the SW output. Connect the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side switch. Ground. SOIC8: Connect the exposed pad to pin 4. 3x3 QFN10: Connect to pins GND 3, 4 and 5 and ensure that said pins are tied together. Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB FB with a resistive voltage divider from the output voltage. The feedback reference voltage is 0.8V. See Setting the Output Voltage. Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network from COMP to GND to compensate the regulation COMP control loop. In some cases, an additional capacitor from COMP to GND is required. See Compensation Components. Enable Input. EN is a digital input that turns the regulator on or off. Drive EN higher EN than 2.7V to turn on the regulator, drive it lower than 1.1V to turn it off. Pull up to the IN pin with 100k resistor for automatic startup. Soft-start Control Input. SS controls the soft-start period. Connect a capacitor from SS SS to GND to set the soft-start period. See Soft-Start Capacitor. BS
2
1
3 4 5
2 3, 4, 5 6
6
7
7 8
8 10
MP2303 Rev. 0.92 5/2/2006
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, VO = 3.3V, L = 10H, C1 = 10F, C2 = 22F x 2, TA = +25C, unless otherwise noted. Feeback Voltage vs. Efficiency vs Temperature Load Current
95 0.810
FEEDBACK VOLTAGE (V)
90
VIN = 12V
EFFICIENCY (%)
85 80 75 70 65 60 55 50 0 0.5 1.0 1.5 2.0
0.805 0.800 0.795 0.790 0.7850 0.780 -40
VIN = 12V VIN = 28V
VIN = 24V
VIN = 4.75V
VOUT = 2.5V
2.5 3.0 3.5 -20
LOAD CURRENT (A)
MP2303-EC02
TEMPERATURE (oC)
0
20
40
60
80
MP2303-TPC01
UVLO Rising vs. Temperature
4.5 2.70
Enable Lockout Threshold vs. Temperature
345 2.65 2.60 2.55 2.50 2.45 2.40 2.35
Oscillator Frequency
UVLO THRESHOLD (V)
4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.7 -40 -20 0 20 40 60 80
ENABLE VOLTAGE (V)
FREQUENCY (KHz)
340
335
330
TEMPERATURE (oC)
2.30 -40
-20
TEMPERATURE (oC)
0
20
40
60
80
325 -40
-20
TEMPERATURE (oC)
0
20
40
60
80
MP2303-TPC02
MP2303-TPC03
MP2303-TPC04
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 12V, VO = 3.3V, L = 10H, C1 = 10F, C2 = 22F x 2, TA = +25C, unless otherwise noted.
Power Off through Enable
VIN = 24V, VOUT = 3.3V, IOUT = 2A
VOUT 1V/div.
VOUT 1V/div. IL 1A/div.
VEN 5V/div. IL 1A/div. VSW 10V/div.
4ms/div.
MP2303-TPC05 MP2303-TPC06
Steady State Test
VIN = 12V, VOUT = 3.3V, IOUT = 1A
Load Transient Test
VIN = 24V, VOUT = 3.3V, IOUT = 0A-1A step with CFF = 470pF
VCOMP 200mV/div. VOUT 100mV/div. VOUT 1V/div. VCOMP 1V/div.
Short Circuit Protection
VIN = 24V, VOUT = 3.3V, IOUT = 0A
VIN 200mV/div.
IL 500mA/div. VOUT AC Coupled 10mV/div. IL 1A/div. VSW 20V/div.
MP2303-TPC07 MP2303-TPC08
IL 2A/div.
MP2303-TPC09
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
OPERATION
+ OVP 0.95V FB 0.3V -OSCILLATOR + 340KHz ---SS 0.8V + + ERROR AMPLIFIER + S R Q Q SW RAMP CLK CURRENT SENSE AMPLIFIER IN + -BS 5V
CURRENT COMPARATOR
COMP EN 2.5V -GND EN OK LOCKOUT COMPARATOR 1.2V OVP IN < 4.05V IN + INTERNAL REGULATORS 1.5V -SHUTDOWN COMPARATOR
MP2303_BD01
+
Figure 1--Functional Block Diagram The MP2303 is a synchronous rectified, current-mode, step-down regulator. It regulates input voltages from 4.75V to 28V down to an output voltage as low as 0.8V, and supplies up to 3A of load current. The MP2303 uses current-mode control to regulate the output voltage. The output voltage is measured at FB through a resistive voltage divider and amplified through the internal transconductance error amplifier. The voltage at COMP pin is compared to the switch current measured internally to control the output voltage. The converter uses internal N-Channel MOSFET switches to step-down the input voltage to the regulated output voltage. Since the high-side MOSFET requires a gate voltage greater than the input voltage, a boost capacitor connected between SW and BS is needed to drive the high-side gate. The boost capacitor is charged from the internal 5V rail when SW is low. When the MP2303 FB pin exceeds 20% of the nominal regulation voltage of 0.8V, the over voltage comparator is tripped; the COMP pin and the SS pin are discharged to GND, forcing the high-side switch off.
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
APPLICATIONS INFORMATION
COMPONENT SELECTION
Setting the Output Voltage The output voltage is set using a resistive voltage divider from the output voltage to FB pin. The voltage divider divides the output voltage down to the feedback voltage by the ratio:
VFB = VOUT R2 R1 + R2
Choose an inductor that will not saturate under the maximum inductor peak current. The peak inductor current can be calculated by:
ILP = ILOAD + VOUT V x 1 - OUT 2 x fS x L VIN
Where ILOAD is the load current. Optional Schottky Diode During the transition between high-side switch and low-side switch, the body diode of the lowside power MOSFET conducts the inductor current. The forward voltage of this body diode is high. An optional Schottky diode may be paralleled between the SW pin and GND pin to improve overall efficiency. Table 2 lists example Schottky diodes and their Manufacturers. Table 2--Diode Selection Guide
Part Number B130 SK13 MBRS130 Voltage/Current Rating 30V, 1A 30V, 1A 30V, 1A Vendor Diodes, Inc. Diodes, Inc. International Rectifier
Thus the output voltage is:
VOUT = 0.8 x R1 + R2 R2
Where VFB is the feedback voltage and VOUT is the output voltage. A typical value for R2 can be as high as 100k, but a typical value is 10k. Using that value, R1 is determined by:
R1 = 12.5 x ( VOUT - 0.8)(k )
For example, for a 3.3V output voltage, R2 is 10k, and R1 is 31.3k. Inductor The inductor is required to supply constant current to the output load while being driven by the switched input voltage. A larger value inductor will result in less ripple current that will result in lower output ripple voltage. However, the larger value inductor will have a larger physical size, higher series resistance, and/or lower saturation current. A good rule for determining the inductance to use is to allow the peak-to-peak ripple current in the inductor to be approximately 30% of the maximum switch current limit. Also, make sure that the peak inductor current is below the maximum switch current limit. The inductance value can be calculated by:
V V L = OUT x 1 - OUT fS x I VIN
Input Capacitor The input current to the step-down converter is discontinuous, therefore a capacitor is required to supply the AC current to the step-down converter while maintaining the DC input voltage. Use low ESR capacitors for the best performance. Ceramic capacitors are preferred, but tantalum or low-ESR electrolytic capacitors may also suffice. Choose X5R or X7R dielectrics when using ceramic capacitors. Since the input capacitor (C1) absorbs the input switching current it requires an adequate ripple current rating. The RMS current in the input capacitor can be estimated by:
I C1 = ILOAD x VOUT VOUT x1- VIN VIN
Where VIN is the input voltage, fS is the 340KHz switching frequency, and IL is the peak-topeak inductor ripple current.
The worst-case condition occurs at VIN = 2VOUT, where:
I C1 = ILOAD 2
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MP2303 - 3A, 28V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE For simplification, choose the input capacitor whose RMS current rating greater than half of the maximum load current. The input capacitor can be electrolytic, tantalum or ceramic. When using electrolytic or tantalum capacitors, a small, high quality ceramic capacitor, i.e. 0.1F, should be placed as close to the IC as possible. When using ceramic capacitors, make sure that they have enough capacitance to provide sufficient charge to prevent excessive voltage ripple at input. The input voltage ripple caused by capacitance can be estimated by:
VIN I V V = LOAD x OUT x 1 - OUT f S x C1 VIN VIN
MP2303 can be optimized for a wide range of capacitance and ESR values. Compensation Components MP2303 employs current mode control for easy compensation and fast transient response. The system stability and transient response are controlled through the COMP pin. COMP pin is the output of the internal transconductance error amplifier. A series capacitor-resistor combination sets a pole-zero combination to control the characteristics of the control system. The DC gain of the voltage feedback loop is given by:
A VDC = R LOAD x G CS x A VEA x VFB VOUT
Output Capacitor The output capacitor is required to maintain the DC output voltage. Ceramic, tantalum, or low ESR electrolytic capacitors are recommended. Low ESR capacitors are preferred to keep the output voltage ripple low. The output voltage ripple can be estimated by:
VOUT = VOUT V x 1 - OUT fS x L VIN 1 x R ESR + 8 x f S x C2
Where AVEA is the error amplifier voltage gain, 400V/V; GCS is the current sense transconductance, 7.0A/V; RLOAD is the load resistor value. The system has 2 poles of importance. One is due to the compensation capacitor (C3) and the output resistor of error amplifier, and the other is due to the output capacitor and the load resistor. These poles are located at:
fP1 = fP2 = GEA 2 x C3 x A VEA 1 2 x C2 x R LOAD
Where C2 is the output capacitance value and RESR is the equivalent series resistance (ESR) value of the output capacitor. In the case of ceramic capacitors, the impedance at the switching frequency is dominated by the capacitance. The output voltage ripple is mainly caused by the capacitance. For simplification, the output voltage ripple can be estimated by:
VOUT = VOUT 8 x fS
2
is the error amplifier Where, GEA transconductance, 820A/V, and RLOAD is the load resistor value. The system has one zero of importance, due to the compensation capacitor (C3) and the compensation resistor (R3). This zero is located at:
f Z1 = 1 2 x C3 x R3
V x 1 - OUT VIN x L x C2
In the case of tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, the output ripple can be approximated to:
VOUT = VOUT V x 1 - OUT x R ESR fS x L VIN
The system may have another zero of importance, if the output capacitor has a large capacitance and/or a high ESR value. The zero, due to the ESR and capacitance of the output capacitor, is located at:
fESR = 1 2 x C2 x R ESR
The characteristics of the output capacitor also affect the stability of the regulation system. The
MP2303 Rev. 0.91 5/2/2006
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE In this case, a third pole set by the optional compensation capacitor (C6) and the compensation resistor (R3) is used to compensate the effect of the ESR zero on the loop gain. This pole is located at:
fP 3 = 1 2 x C6 x R3
Table 3--Compensation Values for Typical Output Voltage/Capacitor Combinations
VOUT
1.8V 2.5V 3.3V 5V 12V 1.8 2.5V 3.3V 5V 2.5V 3.3V 5V 12V
L
4.7H 4.7H 6.8H 6.8H 10H 10H 15H 15H 22H 4.7H 4.7H 6.8H 6.8H 10H 10H 15H 4.7H 6.8H 6.8H 10H 10H 15H 15H 22H
C2
100F Ceramic 47F Ceramic 22Fx2 Ceramic 22Fx2 Ceramic 22Fx2 Ceramic 100F/100m SP-CAP 47F SP-CAP 47F SP-CAP 47F SP CAP 560F Al. 30m ESR 560F Al. 30m ESR 470F Al. 30m ESR 220F Al. 30m ESR
R3
5.6k 3.65k 4.42k 6.98k 16.5k 8.4k 5.6k 6.8k 10k 10k 10k 15k 15k
C3
5.6nF 8.2nF 4.7nF 3.3nF 1.8nF 2.2nF 3.3nF 2.2nF 2.2nF 12nF 10nF 8.2nF 10nF
C6
None None None None None None None None None 1.8nF 1.5nF 1nF 390pF
The goal of compensation design is to shape the converter transfer function to get a desired loop gain. The system crossover frequency where the feedback loop has the unity gain is important. Lower crossover frequencies result in slower line and load transient responses, while higher crossover frequencies could cause system instability. A good rule of thumb is to set the crossover frequency to approximately one-tenth of the switching frequency. Switching frequency for the MP2303 is 340KHz, so the desired crossover frequency is 34KHz. Table 3 lists the typical values of compensation components for some standard output voltages with various output capacitors and inductors. The values of the compensation components have been optimized for fast transient responses and good stability at given conditions.
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE To optimize the compensation components for conditions not listed in Table 2, the following procedure can be used. 1. Choose the compensation resistor (R3) to set the desired crossover frequency. Determine the R3 value by the following equation:
2 x C2 x f C VOUT R3 = x G EA x G CS VFB
Soft-Start Capacitor To reduce input inrush current during startup, a programmable soft-start is provided by connecting a capacitor (C4) from pin SS to GND. The soft-start time is given by:
t SS = C4 x 0.8 V 6A
Where fC is the desired crossover frequency, 34KHz. 2. Choose the compensation capacitor (C3) to achieve the desired phase margin. For applications with typical inductor values, setting the compensation zero, fZ1, below one forth of the crossover frequency provides sufficient phase margin. Determine the C3 value by the following equation:
C3 > 4 2 x R3 x f C
To reduce the susceptibility to noise, do not leave SS pin open. Use a capacitor with small value if you do not need soft-start function. External Bootstrap Diode It is recommended that an external bootstrap diode be added when the system has a 5V fixed input or the power supply generates a 5V output. This helps improve the efficiency of the regulator. The bootstrap diode can be a low cost one such as IN4148 or BAT54.
5V
3. Determine if the second compensation capacitor (C6) is required. It is required if the ESR zero of the output capacitor is located at less than half of the 340KHz switching frequency, or the following relationship is valid:
f 1 BS
MP2303
SW
10nF
MP2303_F02
Figure 2--External Bootstrap Diode This diode is also recommended for high duty cycle operation (
VOUT >65%) and high output VIN
If this is the case, then add the optional compensation capacitor (C6) to set the pole fP3 at the location of the ESR zero. Determine the C6 value by the equation:
C6 = C2 x R ESR R3
voltage (VOUT>12V) applications.
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL APPLICATION CIRCUITS
INPUT 4.75V to 28V C5 10nF
IN EN
BS SW
OUTPUT 2.5V 3A
MP2303
SS GND FB COMP
C6
(optional)
C3 8.2nF
D1 B130
(optional)
MP2303_F03
Figure 3--MP2303 with 2.5V Output, 47F/6.3V Ceramic Output Capacitor
INPUT 4.75V to 28V
D2 C5 10nF
IN EN BS SW
OUTPUT 3.3V/3A
MP2303
SS GND FB COMP
C6
(optional)
C3 4.7nF
D1 B130
(optional)
MP2303_F04
Figure 4--MP2303 with 3.3V Output, 47F/6.3V Ceramic Output Capacitor
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
PACKAGE INFORMATION
SOIC8N (EXPOSED PAD)
PIN 1 IDENT. 0.229(5.820) 0.244(6.200)
NOTE 4 0.150(3.810) 0.157(4.000)
0.0075(0.191) 0.0098(0.249)
SEE DETAIL "A"
NOTE 2 0.013(0.330) 0.020(0.508) 0.050(1.270)BSC 0.011(0.280) x 45o 0.020(0.508)
0o-8o
0.016(0.410) 0.050(1.270)
DETAIL "A"
.028
NOTE 3 0.189(4.800) 0.197(5.000) 0.053(1.350) 0.068(1.730) 0.049(1.250) 0.060(1.524) SEATING PLANE 0.001(0.030) 0.004(0.101)
.050
0.200 (5.07 mm)
0.140 (3.55mm)
0.060
Land Pattern
NOTE: 1) Control dimension is in inches. Dimension in bracket is millimeters. 2) Exposed Pad Option (N-Package) ; 2.31mm -2.79mm x 2.79mm - 3.81mm. Recommend Solder Board Area: 2.80mm x 3.82mm = 10.7mm 2 (16.6 mil2) 3) The length of the package does not include mold flash. Mold flash shall not exceed 0.006in. (0.15mm) per side. With the mold flash included, over-all length of the package is 0.2087in. (5.3mm) max. 4) The width of the package does not include mold flash. Mold flash shall not exceed 0.10in. (0.25mm) per side. With the mold flash included, over-all width of the package is 0.177in. (4.5mm) max.
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MP2303 - 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER INITIAL RELEASE - SPECIFICATIONS SUBJECT TO CHANGE
3mm x 3mm QFN10
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications.
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Price & Availability of MP230306

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