"MP2303ADN手册: 3A, 28V 360kHz降压转换器详解"
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收藏 432KB PDF 举报 The MP2303A is a high-performance synchronous buck regulator designed for applications requiring a continuous load current of up to 3A and an input voltage range of 28V. This monolithic device integrates a high-side MOSFET with a low-side MOSFET to provide efficient step-down conversion at a frequency of 360kHz. The MP2303A is compact and versatile, making it suitable for a wide range of power supply designs. The device is protected by patents and proprietary information, ensuring high quality and reliability. With its advanced analog IC technology, the MP2303A represents the future of efficient power management solutions. Whether used in industrial, automotive, or consumer electronics applications, the MP2303A delivers superior performance and versatility. Monolithic Power Systems (MPS) holds all rights to the MP2303A, prohibiting unauthorized duplication and photocopying. For designers seeking a reliable and efficient buck regulator for their power supply designs, the MP2303A is the ideal choice.
MP2303A – 3A, 28V, 360kHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
MP2303A Rev.1.1 www.MonolithicPower.com 3
7/25/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
(5)
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ
(
5
)
Max Units
Shutdown Supply Current V
EN
= 0V 0.3 3.0 μA
Supply Current V
EN
= 2.7V, V
FB
= 1.0V 1.45 1.6 mA
Feedback Voltage V
FB
4.7V
V
IN
28V,
T
A
= +25°C
0.780 0.800 0.820 V
-40°C ≤ T
A
≤ +85°C
0.765 0.835 V
OVP Threshold Voltage 0.90 0.95 1.00 V
Error Amplifier Voltage Gain A
EA
400 V/V
Error Amplifier Transconductance G
EA
I
C
=
10μA
550 820 1100 μA/V
High-Side Switch-On Resistance R
DS
(
ON
)
1
150 mΩ
Low-Side Switch-On Resistance R
DS
(
ON
)
2
80 mΩ
High-Side Switch Leakage Current V
EN
= 0V, V
SW
= 0V 0 10 μA
Upper Switch Current Limit 4.3 6.0 A
Lower Switch Current Limit From Drain to Source 1.25 A
COMP to Current Sense
Transconductance
G
CS
7 A/V
Oscillation Frequency F
osc1
T
A
= +25°C
310 360 410 kHz
-40°C ≤ T
A
≤ +85°C
290 430 kHz
Short Circuit Oscillation Frequency F
osc2
V
FB
= 0V 55 kHz
Maximum Duty Cycle D
MAX
V
FB
= 0.7V 85 90 %
Minimum On Time 180 ns
EN Shutdown Threshold Voltage V
EN
Rising 1.0 1.3 1.6 V
EN Threshold Voltage Hysteresis 205 mV
EN Input Current V
EN
= 5V 2 μA
Input Under Voltage Lockout
Threshold
UVLO
V
IN
rising, T
A
= +25°C
3.6 3.95 4.3 V
0°C ≤ T
A
≤ +70°C
3.2 4.5 V
Input Under Voltage Lockout
Threshold Hysterisis
125 mV
Soft-Start Current V
SS
= 0V 6 μA
Thermal Shutdown 160 °C
Notes:
5) 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
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