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MIC28303 데이터시트 PDF




Microchip에서 제조한 전자 부품 MIC28303은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 MIC28303 기능
기능 3A Power Module
제조업체 Microchip
로고 Microchip 로고


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MIC28303 데이터시트, 핀배열, 회로
MIC28303
50V, 3A Power Module
Features
• Easy to Use
- Stable with low-Equivalent Series Resistance
(ESR) ceramic output capacitor
- No Inductor and No Compensation to
Choose
• 4.5V to 50V Input Voltage
• Single-Supply Operation
• Power Good (PG) Output
• Low Radiated Emission (EMI) per EN55022, Class B
• Adjustable Current Limit
• Adjustable Output Voltage from 0.9V to 24V (Also
Limited by Duty Cycle)
• 200 kHz to 600 kHz, Programmable Switching
Frequency
• Supports Safe Start-Up into a Prebiased Output
• –40°C to +125°C Junction Temperature Range
• Available in 64-pin, 12 mm × 12 mm × 3 mm QFN
Package
Applications
• Distributed Power Systems
• Industrial
• Medical
• Telecom
• Automotive
General Description
MIC28303 is synchronous step-down regulator
module, featuring a unique adaptive ON-time control
architecture. The module incorporates a DC/DC
controller, power MOSFETs, bootstrap diode, bootstrap
capacitor and an inductor in a single package. The
MIC28303 operates over an input supply range from
4.5V to 50V and can be used to supply up to 3A of
output current. The output voltage is adjustable down
to 0.8V with an accuracy of ±1%. The device operates
with programmable switching frequency from 200 kHz
to 600 kHz.
The MIC28303-1 uses HyperLight Load® architecture
for improved efficiency at light loads. The MIC28303-2
uses Hyper Speed Control® for ultra-fast transient
response.
The MIC28303 offers a full suite of protection features.
These include undervoltage lockout, internal soft-start,
foldback current limit, “hiccup” mode short-circuit
protection, and thermal shutdown.
Typical Application Circuit
MIC28303
12x12 QFN
EN
R19
75kΩ
PG
PVDD ANODE BSTC BSTR
PVIN
VIN
EN
FREQ
VOUT
MIC28303
SW
ILIM
FB
PGOOD
GND PGND
VIN
4.5V to 50V
C2,C3
2.2μF
C1
100μF
R3
16.5kΩ R1
10kΩ
R15
3.57kΩ C10
0.1μF
C12
2.2nF
C14
47μF
VOUT
5V/3A
R11
1.91kΩ
C6
10pF
GND
2016 Microchip Technology Inc.
DS20005464A-page 1




MIC28303 pdf, 반도체, 판매, 대치품
MIC28303
TABLE 1-1: ELECTRICAL CHARACTERISTICS
Electrical Characteristics: PVIN = VIN = 12V, VOUT = 5V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values
indicate –40°C TJ +125°C. (Note 1).
Parameters
Min.
Typ.
Max.
Units
Conditions
Power Supply Input
Input Voltage Range (PVIN,
VIN)
Controller Supply Current
Operating Current
Shutdown Supply Current
PVDD Supply
PVDD Output Voltage
PVDD UVLO Threshold
PVDD UVLO Hysteresis
Load Regulation
Reference
Feedback Reference Voltage
FB Bias Current
Enable Control
EN Logic Level High
EN Logic Level Low
EN Hysteresis
EN Bias Current
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum Off-Time
4.5
4.8
3.8
0.6
0.792
0.784
1.8
400
140
0.4
2.1
0.1
0.7
27
4.0
5.2
4.2
400
2.0
0.8
0.8
5
200
5
600
300
85
0
200
50
0.75
3.0
10
5.4
4.7
3.6
0.808
0.816
500
0.6
20
750
260
V—
mA Current into Pin 60; VFB = 1.5V
(MIC28303-1)
Current into Pin 60; VFB = 1.5V
(MIC28303-2)
µA Current into Pin 60; VEN = 0V
mA IOUT = 0A (MIC28303-1)
IOUT = 0A (MIC28303-2)
µA PVIN = VIN = 12V, VEN = 0V
V VIN = 7V to 50V, IPVDD = 10mA
PVDD rising
mV —
% IPVDD = 0 to 40mA
V TJ = 25°C (±1.0%)
–40°C TJ 125°C (±2%)
nA VFB = 0.8V
V—
mV —
µA VEN = 12V
kHz FREQ pin = open
RFREQ=100k(FREQpin-to-GND)
%—
VFB > 0.8V
ns —
Soft-Start
Soft-Start Time
—5
— ms —
Short-Circuit Protection
Current Limit Protection (VCL)
Short-Circuit Threshold
–30
–23
–14
–7
Note 1: Specification for packaged product only.
0
9
mV VFB = 0.79V
mV VFB = 0V
DS20005464A-page 4
2016 Microchip Technology Inc.

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MIC28303 전자부품, 판매, 대치품
MIC28303
2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
FIGURE 2-1:
Efficiency vs. Output
Current (MIC28303-1).
FIGURE 2-3:
(MIC28303-2).
Thermal Derating
FIGURE 2-2:
Efficiency vs. Output
Current (MIC28303-2).
TABLE 2-1: RECOMMENDED COMPONENT VALUES FOR 275KHZ SWITCHING FREQUENCY
VOUT
VIN
R1 R11
R3
(Rinj)
R19
R15
(Top
(Bottom
Feedback Feedback
C10
(Cinj)
Resistor) Resistor)
C12
(Cff)
COUT
5V
5V
3.3V
3.3V
7V to 18V
18V to 50V
5V to 18V
18V to 50V
16.5 k
39.2 k
16.5 k
39.2 k
75 k3.57 k
75 k3.57 k
75 k3.57 k
75 k3.57 k
10 k
10 k
10 k
10 k
1.9 k
1.9 k
3.24 k
3.24 k
0.1 µF
0.1 µF
0.1 µF
0.1 µF
2.2 nF
2.2 nF
2.2 nF
2.2 nF
2 x 47 µF/6.3V
2 x 47 µF/6.3V
2 x 47 µF/6.3V
2 x 47 µF/6.3V
2016 Microchip Technology Inc.
DS20005464A-page 7

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