MPQ4470/4470A
High-Efficiency, Fast-Transient, 5A, 36V
Synchronous, Step-Down Converter
AEC-Q100 Qualified
The Future of Analog IC Technology适合男生的工作
DESCRIPTION
The MPQ4470/4470A is a fully-integrated, high-frequency, synchronous, rectified, step-down, switch-mode converter. It offers a very compact solution to achieve a 5A, continuous-output current over a wide input-supply range with excellent load and line regulation. It also provides fast transient respon and good stability for wide input-supply and load range. The MPQ4470/4470A operates at high efficiency over a wide output current load range. MPQ4470 has full protection features include SCP, OCP, OVP latch, UVP, and thermal shutdown. MPQ4470A has the same protection features to MPQ4470 except has no OVP latch function.babygirl
The MPQ4470/4470A requires a minimal number of readily-available, standard, external components, and is available in a space-saving 3mm×4mm, 20-pin, QFN package.
FEATURES
• Wide 4.5V-to-36V Operating Input Range • Guaranteed 5A, Continuous Output Current • Internal 40m Ω High-Side, 20m Ω Low-Side
Power MOSFETs • Proprietary Switching-Loss-Reduction
Technology
• 1% Reference Voltage
• Programmable Soft-Start Time • Low Drop-out Mode
• 200kHz-to-1MHz Switching Frequency • SCP, OCP, OVP Latch (MPQ4470 only),
UVP, and Thermal Shutdown
• Output Adjustable from 0.8V to 0.9×V IN • Available in a 3mm×4mm 20-pin QFN
Package
• Available in AEC-Q100 Grade 1
APPLICATIONS
• Notebook Systems and I/O Power • Automotive Systems • Networking Systems • Industrial Supplies
• Optical Communications Systems • Distributed Power and POL Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, plea visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
0.01
0.11
10
六年级下册数学题OUTPUT CURRENT (A)
ORDERING INFORMATION
Part Number*Package Top Marking
MPQ4470GL QFN20
(3mm×4mm) 4470 MPQ4470AGL QFN20
(3mm×4mm) 4470A MPQ4470GL-AEC1 QFN20
(3mm×4mm) 4470 MPQ4470AGL-AEC1 QFN20
(3mm×4mm) 4470A * For Tape & Reel, add suffix –Z (e.g. MPQ4470/4470AGL–Z)
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage 40V -0.3V to V IN + 0.3V V SW + 6V -0.3V to V CC+0.6V All -0.3V to +6V Continuous Power Dissipation (T A = +25°C)(2)………………………………… …………….2.6W Operating 150°C
.........260°C -65°C to +150°C Recommended Operating Conditions(3) Supply Voltage 4.5V to 36V Output Voltage 0.8V to 0.9×V IN Operating Junction Temp. (T J).-40°C to +125°C Thermal Resistance (4)θJA θJC
QFN20 (3mm×4mm)...............48......10...°C/W Notes:
1) Exceeding the ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T J(MAX), the junction-to-ambient thermal resistance θJA, and the ambient temperature T A. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D(MAX)=(T J(MAX)-T A)/θJA. Exceeding the maximum allowable power dissipation will cau excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
ELECTRICAL CHARACTERISTICS
V IN = 24V, V EN = 2V, T J = -40°C to +125°C, unless otherwi noted. Typical values are at T J = 25°C.
Parameters Symbol Condition Min Typ Max Units Supply Current (Shutdown) I IN V EN = 0V 10 300 nA Supply Current (Quiescent) I IN V FB = 0.95V 500 600 μA HS Switch On Resistance HS RDS-ON 40 65 m Ω LS Switch On Resistance (5) LS RDS-ON 20 m Ω
Switch Leakage SW LKG V EN = 0V
V SW = 0V or 36V
10 400 nA
Current Limit I LIMIT 6 8 12 A One-Shot On Time t ON V IN =12V, R FREQ =30k Ω 230 280 330 ns
Minimum Off Time (5)
t OFF 100 ns
Fold-back Off Time (5) t FB I LIM =1(HIGH),
FB>50%V REF 4.8 μs
Fold-back Off Time (5) t FB I LIM =1(HIGH),
FB<50%V REF
16.8 μs
OCP hold-off time (5) t OC I LIM =1(HIGH) 100 μs V FB T J = 25°C
807 815 823 mV
Feedback Voltage
V FB
T J = -40°C to 125°C 803 827 mV Feedback Current I FB V FB = 815mV 10 50 nA Soft Start Charging Current I SS V SS =0V 6 8.5 11 μA Power Good Rising Threshold PGOOD Vth-Hi 0.87 0.9 0.93 V FB Power Good Falling Threshold PGOOD Vth-Lo 0.82 0.85 0.88 V FB Power Good Th
reshold
Hysteresis
PGOOD Vth-Hys 0.05 V FB
Power Good Rising Delay t PGOOD 500 700 900 μs EN Rising Threshold EN Vth-Hi 1.1 1.25 1.4 V EN Falling Threshold EN Vth-Lo 0.73 0.86 0.99 V EN Threshold Hysteresis EN Vth-Hys 390 mV EN Input Current I EN V EN = 2V 1.5 2 μA V IN Under-Voltage Lockout
Threshold Rising
INUV Vth_R
3.7
4.0 4.3 V V IN Under-Voltage Lockout
Threshold Falling
INUV Vth_F
2.8
3.1 3.4 V V IN Under-Voltage Lockout
Threshold Hysteresis INUV HYS
900 mV V CC Regulator V CC I CC =0 4.5 4.85 5.2 V V CC Load Regulation I CC =10mA 1 2 % Vo Over-Voltage Protection
Threshold (6)
V OVP
1.15 1.25 1.35 V FB Thermal Shutdown (5) T SD 175 °C Thermal Shutdown Hysteresis (5) T SD-HYS 45 °C
Note:
5) Derived from bench characterization, not tested in production. 6) For MPQ4470 only, MPQ4470A has no OVP function.
Feedback Voltage vs.Junction Temperature
VIN=24V 0.810
0.8120.8140.816
0.8180.820-50-25
0255075100125
F E E D B A C K V O L T A
G E (V )
Quiescent Current vs.Junction Temperature
VIN=24V 400
450
500
550
600-50-25
0255075100125
Shutdown Current vs.Junction Temperature
VIN=24V 0
20406080100120-50-25
25
50
75100125
S H U T D O W N C U R R E N T (n A )
Ton vs.
Junction Temperature
VIN=12V 275
277279281283285-50-25
25
50
75100125
T O N (n s )
HS R DS-ON vs.
Junction Temperature
VIN=24V,BST-SW=5V 20
25
303540
455055
60-50-25
25
香菇炒油菜的家常做法
50
75100125
Current Limit vs.
Junction Temperature
VIN=24V
6.0
6.5
7.07.5
8.08.5
9.0-50-25
25
50
75100125
C U R R E N T L I M I T (A )
I SS vs. Junction Temperature
古诗村居
VIN=24V 7.0
7.58.08.59.09.510.0-50-25
25
50
什么什么中外
75100125
VIN UVLO Rising Threshold vs.Junction Temperature 3.95
和你歌词3.973.99
4.014.034.05-50-25
0255075100125V I N U V L O R I S I N G T H R E S H O L D (V )
VIN UVLO Falling Threshold vs.Junction Temperature
VIN=24V
3.10
3.123.143.163.183.20-50-25
0255075100125
返流性胃炎
V I N U V L O F A L L I N G T H R E S H O L D (V )
EN Threshold vs.
Junction Temperature
VIN=24V 0.7
0.80.91.01.11.21.3
-50-25
25
50
75100
125
E N T H R E S H O L D (V )
PG Rising Threshold vs.Junction Temperature
VIN=24V
0.895
0.8970.8990.9010.9030.905
-50-25
0255075100125P G R I S I N G T H R E S H O L D (F B )
PG Falling Threshold vs.Junction Temperature
VIN=24V
0.845
0.8470.8490.8510.8530.855
-50-25
0255075100125
P G F A L L I N G T H R E S H O L D (F B )
