MPS_MP1471规格书

V
1.6
μA
0
μA
3.85
4.2
4.55
V
340
mV
1
ms
150
°C
20
°C
MP1471 Rev. 1.01

3
8/27/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
MOSFETs • Proprietary Switching-Loss–Reduction
Technology • High-Efficiency Synchronous-Mode
Operation • Fixed 500kHz Switching Frequency • Internal AAM Power-Save Mode for High
VIN ..................................................-0.3V to 17V VSW ......................................................................
-0.3V (-5V for <10ns) to 17V (19V for <10ns) VBS ......................................................... VSW+6V All Other Pins ...................................–0.3V to 6V Continuous Power Dissipation (TA = +25°C) (2)
MP1471 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ELECTRICAL CHARACTERISTICS (5)
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
The MP1471 requires a minimal number of
readily-available,
standard,
external
components and is available in a space-saving
6-pin TSOT23 package.
FEATURES
• Wide 4.7V-to-16V Operating Input Range • 150mΩ/70mΩ Low-RDS(ON) Internal Power
EN Input Current
VIN Under-Voltage Lockout Threshold, Rising VIN Under-Voltage Lockout Threshold Hysteresis Soft-Start Period Thermal Shutdown(5) Thermal Hysteresis(5)
MP1471 Rev. 1.01

2
8/27/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
........................................................... 1.25W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature................. -65°C to 150°C
IEN
INUVVth INUVHYS
τSS
VEN=2V VEN=0
Notes: 5) Guaranteed by design.
Min
Typ
Max Units
1
μA
0.83
mA
150
mΩ
70
mΩ
1
μA
3.5
4.2
A
400
490
580
kHz
88
92
%
90
ns
776
800
824
mV
1.4
1.5
1.6
V
1.23 1.32 1.41
© 2013 MPS. All Rights Reserved.
MP1471 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ORDERING INFORMATION
Part Number* MP1471GJ
Package TSOT23-6
“MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN GND
EN
3 IN
BST 6 U1
SW 2 MP1471
IINVEN = 0V NhomakorabeaIq
VEN = 2V, VFB = 1V
HSRDS-ON VBST-SW=5V
LSRDS-ON Vcc=5V
SWLKG VEN = 0V, VSW =12V
ILIMIT
fSW
VFB=0.75V
DMAX VFB=700mV
τON_MIN
VFB
VEN_RISING
VEN_FALLING
The Future of Analog IC Technology
MP1471
High-Efficiency, 3A Peak, 16V, 500kHz Synchronous, Step-Down Converter In a 6-Pin TSOT 23
DESCRIPTION
The MP1471 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 3A peak output current over a wide input supply range, with excellent load and line regulation. The MP1471 has synchronous-mode operation for higher efficiency over the output current-load range.
Efficiency at Light Load • Internal Soft-Start • Over-Current Protection and Hiccup • Thermal Shutdown • Output Adjustable from 0.8V • Available in a 6-pin TSOT-23 package
Thermal Resistance (4) θJA θJC
TSOT-23-6............................. 100 ..... 55... °C/W
Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the
5 EN
GND 1
FB 4
R3 40.2k
3.3V
R1 40.2k
R2 13k
VOUT
100
95
90
85
80
75
70
65
60
55
50
0.01
0.1
1
10
MP1471 Rev. 1.01

1
8/27/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
Supply Current (Shutdown) Supply Current (Quiescent) HS Switch-On Resistance LS Switch-On Resistance Switch Leakage Current Limit (5) Oscillator Frequency Maximum Duty Cycle Minimum On Time(5) Feedback Voltage EN Rising Threshold EN Falling Threshold
Recommended Operating Conditions (3)
Supply Voltage VIN ...........................4.7V to 16V Output Voltage VOUT......................0.8V to 0.9VIN Operating Junction Temp. (TJ). -40°C to +125°C