MP2225 数据手册错误-MP2225 .pdfMP2225-18V/5A SYNCHRONOUS

文件名称: MP2225 数据手册错误-MP2225 .pdf

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详细说明：MP2225 数据手册错误-MP2225 .pdfMP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER ABSOLUTE MAXIMUM RATINGS (1) Thermal resistance BJA 6 -.3v to 20V TSOT23-8.100..55.°C Vsw. 0.3V(-5V for <10ns)to VIN+0.3v(23v for Notes 1)Exceeding these ratings may damage the device 10ns) 2 About the details of en pin's ABS MAX rating, please refer to Vsw+5.5V Page 12, Enable/SYNC control section Continuous Power Dissipation (TA=+25C all Other pins 0.3Vto5.5V 3The maximum allowable power dissipation is a function of the maximum junction temperature T,(MAX), the junction-to ambient thermal resistance BjA, and the ambient temperate TSOT23-8 1.25W TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by Po(MAX)=(T Junction Temperature..........150C (MAX)-TA0JA. EXceeding the maximum allowable power Lead temperature 260°C dissipation will cause excessive die temperature and the Storage Temperature.65°cto150°c egulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent Recommended Operating Conditions (4) 4)The device is not guaranteed to function outside of its Supply voltage VIN………4.5to18V operating conditions 5)Measured on JESD51-7, 4-layer PCB Output Voltage vout 0.6v to min. of vin 1 V and vinⅹDmax Operating Junction Temp. (TJ) 40C to+125C MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER ELECTRICAL CHARACTERISTICS VIN =12V, TJ=-40 C to +125C(b), Typical value is tested at TJ =+25C, unless otherwise noted Parameter Symbol Condition Min Typ M ax Units Supply current( shutdown INVN=0VT=25°C UA Supply Current( Shutdown VEN=OV A Supply Current(Quiescent) VEN=2V, VEB=0.7V 320 400 UA HS SWitch-On Resistance HSRDS-ONVBST-SW=5V 47 mo LS Switch-On Resistance LSRDS-ON Vcc =5V 18 mo Switch Leakage EN=0V,Vsw=12V,T,∽ sWuK|=25°C A Current limit⑦ AIT Under 40% Duty Cycle 65 9 A Oscillator Frequency SW VF=0.48 380 500 580 kHz Fold-Back Frequency Fp VEB<300mV 0.56 Maximum Duty Cycle D MAX VeB=500mV 90 95 % Minimum on time 50 ns Sync Frequency Range SYNC 0.2 MHZ Feedback Voltage J=25°C 594 600 606 mv Feedback∨ oltage 591600 609 MV Feedback Current FB VEB=620mV 10 50 DA EN Rising Threshold EN RISING 1.15 1.65 V EN Hysteresis V TEN HYS 160 VEN=2V 85 A EN Input Current VEN=O 0 A ENTurn-Off Delay Entd-of. u 10 s VIN Under-Voltage Lockout INUVVth 3.85 Threshold-Rising 4.1 4.35 VIN Under-Voltage Lockout Threshold-Hysteresis INUVHYS 735 mv Soft -start Time 10 to 9o% Output Voltage ms Thermal shutdown ( T 150 Thermal Hysteresis SD HYS 20 C Notes 6)Not tested in production. Guaranteed by over-temperature correlation 7)Guaranteed by engineering sample characterization 8)Guaranteed by design MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS Performance waveforms are tested on the evaluation board described in the Design Example section VIN 12V, VouT =3.3V, TA=25C, unless otherwise noted Efficiency vs Efficiency VS Efficiency Vs Load current Load current Load current VouT=5V, L=4. 7HH VOUT=3.3V, L=3.3uH VoUT=25V,L=2.∠μH 100 100 00 95 95 90 85 85 VIN=6.5V N 75 =12V N=12V 675 65 65 L60 VIN=18V VN=18 N=18V 45 45 45 40 40 40 0.01 10 0.1 OU市 PUT CURRENT(A) OUTPUT CURRENT (A) OUTPUT CURRENT(A) Efficiency Vs Efficiency Vs Load current Load current Line Regulation VouT=1. 8V, L=2.2uh VouT=1V, L=1uH 95 80 VIN=5V N 75 VIN=5V IOUT=OA 75 05 70 12V L60 L55 UT=5A IN=18V lOUT=2.5A 55 z-01 40 45 35 30 t-0.2 0.01 10 0.01 0.1 4681012141618 OUTPUT CURRENT (A) OUTPUT CURRENT (A INPUT VOLTAGE Load Regulation Quiescent Current Shutdown current VSInput Voltage VS Input Voltage VEN=OV 0.4 0.3 VIN=5V 375 0.2 0.1 VIN=18V 350 zu223O-zu0 325 5u223zo 28 VIN=12V 300 0.2 24 山275 3 -04 250 20 1618 OUTPUT CURRENT(A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board described in the design Example section IN=12V, VouT=3.3V, TA=25C, unless otherwise noted VIN UVLO VS EN Threshold vs Switching Frequency Vs Temperature Temperature Ambient Temperature TA=-40°C-125°c TA=40°C-125°C TA=40°c-125C 15 520 Rising uo9aoTou2E=O 4.5 Risin 14 N>O面 510 1.3 500 3.5 Falling uoao0 1.2 ing 2.5 z山 ozOH50 490 480 470L -40-1510356085110135 401510356085110135 40-1510356085110135 AMBIENT TEMPERATURE C AMBIENT TEMPERATURE CC) AMBIENT TEMPERATURE C Reference Voltage Current Limit when Output Current limit vs vS. Temperature Short vs Temperature Duty cycle TA=-40°C125°C TA=40C-125°C 0.7 12 13 0.65 11 HO>u 0.6 uo 10 Hzu∝ 9 0.55 9 5 0.5 0-1510356085110135 401510356085110135 1020304050607080 AMBIENT TEMPERATURE(C AMBIENT TEMPERATURE(C) DUTY CYCLE ( %) MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board described in the design Example section VIN= 12V, VOUT 3.3V, TA= 25C, unless otherwise noted Output Current Derating Output Current Derating Output Current Derating vS Output Voltage VS. Output Voltage VS Ambient Temperature Tcase rise=45°C, Tcase rise=45°C, VN=5V,Tr=125°C on 4-Layered board in Size 6.5cmX65cm on 2-Layered Board in Size 6.5cm X6.50 on 4-Layered Board in Size 6.5cmX65cm 6 V=12V VOUT:1.8V =12V 乙u2 V1=5V 4 VIN=5V c u22 OUT 2 n5O 0 000.51015202530354045505560 00051015202530354045505560 40-20020406080100 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) AMBIENT TEMPERATURE CC) Output Current Derating Output Current Derating Output Current Derating VS Ambient Temperature VS Ambient Temperature VS Ambient Temperature VN=12V,T=125°C VN=5V,T=125°C VN=12V,T=125°C on 4 Layered Board in Size 6.5cmX65cm on 2 Layered Board in Size 6. 5cmX6 5cm on 2 Layered Board in Size 6.5cmX65cm 6 6 6 VOuT=1.8V OUT=1.8V 5 HzuX3O 4 4 OUT VOUT=3.3V OUT=3.3V VouT-5V n Ha5O OUT-5V 0 0 0 40-20020406080100 40-20020406080100 40-20020406080100 AMBIENT TEMPERATURE(C) AMBIENT TEMPERATURE(C) AMBIENT TEMPERATURE(C) MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board described in the Design Example section VIN 12V, VouT =3.3V, TA=25C, unless otherwise noted Start up through Shutdown through Start up through Input Voltage Input Voltage Input Voltage J MOUT=OA OUT=OA OUT-5A OUT OUT 2V/di 2V/div 2V/div 10V/div 10V/diy V 5V/d V/div mA/div 500mA/div I NDUCTOR 5A/diy 1ms/div 40ms/div 1ms/diy Shutdown through Start Up through Enable Shutdown through Enable Input Voltage UT=OA CUT=5A VouT 2V/di 2V/div …↓ 10V/div 5V 5V/div 5V/div 5V/div 5V/div INDUCTOR Ad ms/div 1ms/diy. 400ms/div Start up through Enable Shutdown throug gh Enable Output Ripple OUT =5A OUT 5A OUT=0A VOuT/AC 10mV/div 2Vidiv 2V/div. ENI 了了 5Vidiv 5V/div 10V/div 5Vidiv 5V/div NDUCTOR 5A/civ 1ms/diy 40μs/di 2msidiv MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board described in the design Example section IN=12V, VouT=3.3V, TA=25C, unless otherwise noted Output Ripple Short Circuit Entry Short Circuit Recovery lOuT=5A OUT=OA OUT=OA VOUT/ACI 20rnV/div 2V/div 2V/div Sw 10dM. 10VIdiv. GH3i4. ill 」 10V/div INDUCTOR INDUCTO 1 us/div 4ms/d 4ms/diy Short Circuit Steady State Short Circuit Entry Short Circuit Recovery OUT 2V/diy VoUTrLMmi: 2V/div m 10V/div NDUCTOR INDUCTOR 10/div 4ms/diy 4ms/div 4ms/dⅳv Transient Response Bode plot lour=25A5A,2.5AμJs lOuT=2.5A VOuT/AC 200mV/div 20 -135 1000 1000001000000 FREQUENCY (Hz) MP2225ReV.1.0 ww. Monolithic Power com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights Reserved MP2225-18V/5A SYNCHRONOUS STEP-DOWN CONVERTER PIN FUNCTIONS Pin# NameDescription AGND Analog Ground. Connect it to GND N Supply voltage. The MP2225 operates from a 4.5V-to-18V input rail. Requires C1 to decouple the input rail Connect using a wide Pcb trace 3 SW Switch Output Connect using a wide PCB trace. GND Power Ground. Requires special consideration during PCB layout. Connect to GND with copper traces and vias BST Bootstrap Requires a capacitor between SW and BST pins to form a floating supply across the high-side switch driver 6EN/SYNC En high to enable the mP2225. Can apply an external clock to the en pin to change the switching frequency VCCBias Supply Decouple with a 0.1 uF-to-022uF capacitor. Feedback. Connect to the tap of an external resistor divider from the output to gnd to set FB the output voltage. The frequency fold-back comparator lowers the oscillator frequen when the FB voltage is below 480mv to prevent current-limit run-away during a short-circuit fault condition MP2225ReV.1.0 ww. MonolithicPower com 4/13/2015 IPS Proprietary Information Patent Protected. Unauthorized Photocopy and duplication Prohibited C 2015 MPS. All Rights ri

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