MP1470
High-Efficiency, 2A, 16V, 500kHz Synchronous, Step-Down Converter
In a 6-Pin TSOT 23
The Future of Analog IC Technology
DESCRIPTION
The MP1470 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 2A continuous output current over a wide input supply range, with excellent load and line regulation. The MP1470 has synchronous-mode operation for higher efficiency over the output current-load range.
Current-mode operation provides fast transient respon and eas loop stabilization.
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Protection features include over-current protection and thermal shutdown.
The MP1470 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 • 163m Ω/86m Ω Low-R DS(ON) Internal Power
MOSFETs • Proprietary Switching-Loss–Reduction
Technique
• High-Efficiency Synchronous-Mode
Operation
• Fixed 500kHz Switching Frequency
• Internal AAM Power-Save Mode for High
Efficiency at Light Load • Internal Soft-Start
• Over-Current Protection and Hiccup • Thermal Shutdown
道路养护• Output Adjustable from 0.8V
• Available in a 6-pin TSOT-23 package
APPLICATIONS • Game Consoles
• Digital Set-Top Boxes
• Flat-Panel Television and Monitors • General Purpos
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, plea visit MPS website under Products, Quality Assurance page.“MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
VOUT
EN
脑力激荡GND
ORDERING INFORMATION
Part Number* Package Top Marking
MP1470GJ TSOT23-6 ADJ
* For Tape & Reel, add suffix –Z (e.g. MP1470GJ–Z);
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
V IN ..................................................-0.3V to 17V V SW ......................................................................
-0.3V (-5V for <10ns) to 17V (19V for <10ns) V BS .........................................................V SW +6V All –0.3V to 6V
Continuous Power Dissipation (T A = +25°C)
(2)
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...........................................................1.25W 150°C 260°C -65°C to 150°C
Recommended Operating Conditions (3)
Supply Voltage V IN ...........................4.7V to 16V Output Voltage V OUT ......................0.8V to 0.9V IN Operating Junction Temp. (T J ).-40°C to +125°C
Thermal Resistance (4)
θJA θJC
<55...°C/W
Notes:
1) Exceeding the ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
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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 (5)
V IN = 12V, T A = 25°C, unless otherwi noted.
Units
Max
Typ
Condition Min
Parameter Symbol
Supply Current (Shutdown) I IN V EN = 0V 1 μA
Supply Current (Quiescent) I q V EN = 2V, V FB = 1V 0.83 mA
=5V 163 mΩ
HS Switch-On Resistance HS RDS-ON V BST-SW
LS Switch-On Resistance LS RDS-ON Vcc=5V 86 mΩ
Switch Leakage SW LKG V EN = 0V, V SW =12V 1 μA
Current Limit (5)I LIMIT 3 3.7 A伊人宗合
580
kHz =0.75V 400
490
Oscillator Frequency f SW V FB
92
% Maximum Duty Cycle D MAX V FB
=700mV 88
Minimum On Time(5)τON_MIN90 ns
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Feedback Voltage V FB776 800 824 mV
EN Rising Threshold V EN_RISING 1.4 1.5 1.6 V
EN Falling Threshold V EN_FALLING 1.23 1.32 1.41 V
μA
V EN
1.6
=2V
EN Input Current I EN
=0 0 μA
V EN
V IN Under-Voltage Lockout
INUV Vth 3.85 4.2 4.55 V Threshold—Rising
V IN Under-Voltage Lockout
INUV HYS 340 mV
Threshold Hysteresis
Soft-Start Period τSS 1 ms
Thermal Shutdown(5) 150 °C
Thermal Hysteresis(5)20 °C
Notes:
5) Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS
V IN = 12V, V OUT = 3.3V, L = 4.9µH, T A
= +25°C, unless otherwi noted.
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
V IN = 12V, V OUT = 3.3V, L = 4.9µH, T A = +25°C, unless otherwi noted.
V OUT 2V/div.V SW 5V/div.V IN 10V/div.I L
500mA/div.
V OUT 2V/div.V SW 5V/div.
V IN 10V/div.I L 1A/div.
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V OUT 2V/div.V SW 10V/div.
V EN 2V/div.I L 1A/div.
V OUT 2V/div.V SW 10V/div.
V EN 2V/div.I L 1A/div.V OUT/AC 50mV/div.
V SW 10V/div.
V IN/AC 200mV/div.I L 1A/div.
V OUT 2V/div.V SW 10V/div.V EN 2V/div.I L
500mA/div.
V
OUT 2V/div.V SW 10V/div.V EN 2V/div.I L
500mA/div.
V OUT 2V/div.V
SW 5V/div.
V IN 10V/div.I L 1A/div.
V OUT 2V/div.V SW 5V/div.
V IN 10V/div.I L
200mA/div.
Startup through Input Voltage
I OUT
= 0A
Shutdown through Input Voltage
I OUT = 0A
Startup through Input Voltage
I OUT
= 2A
Shutdown through Input Voltage
I OUT
= 2A
Startup through Enable
I OUT = 0A
Shutdown through Enable
I OUT = 0A
Startup through Enable
I OUT = 2A
Shutdown through Enable
I OUT = 2A
Input/Output Ripple
I OUT = 2A
