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MCP16322 데이터시트 PDF




Microchip에서 제조한 전자 부품 MCP16322은 전자 산업 및 응용 분야에서
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부품번호 MCP16322 기능
기능 High Efficiency Synchronous Buck Regulator
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MCP16322 데이터시트, 핀배열, 회로
Obsolete Device
For further designs, please refer to the MIC24046 or MCP16311/2 Data Sheets
MCP16321/2
24V Input, 1A/2A Output, High Efficiency Synchronous Buck Regulator
with Power Good Indication
Features
• Up to 95% Typical Efficiency
• Input Voltage Range: 6.0V to 24V
• 1A Output Current (MCP16321)
• 2A Output Current (MCP16322)
• Fixed Output Voltages: 0.9V, 1.5V, 1.8V, 2.5V,
3.3V, 5V with 2% Output Voltage Accuracy
• Adjustable Version Output Voltage Range:
0.9V to 5V with 1.5% Reference Voltage Accuracy
• Integrated N-Channel High-Side Switch: 180 m
• Integrated N-Channel Low-Side Switch: 120 m
• 1 MHz Fixed Frequency
• Low Device Shutdown Current
• Peak Current Mode Control
• Internal Compensation
• Stable with Ceramic Capacitors
• Internal Soft-Start
• Cycle-by-Cycle Peak Current Limit
• Undervoltage Lockout (UVLO): 5.75V
• Overtemperature Protection
• VOUT Overvoltage Protection
• VOUT Voltage Supervisor Reported at the PG Pin
• Available Package: QFN-16 (3x3 mm)
Applications
• PIC®/dsPIC® Microcontroller Bias Supply
• 12V Industrial Input DC-DC Conversion
• Set-Top Boxes
• DSL Cable Modems
• Automotive
• Wall Cube Regulation
• SLA Battery Powered Devices
• AC-DC Digital Control Power Source
• Power Meters
• Consumer
• Medical and Health Care
• Distributed Power Supplies
Description
The MCP16321/2 is a highly integrated, high-efficiency,
fixed frequency, synchronous step-down DC-DC
converter in a 16-pin QFN package that operates from
input voltages up to 24V. Integrated features include a
high-side and low-side N-Channel switch, fixed
frequency Peak Current Mode Control, internal
compensation, peak current limit, VOUT overvoltage
protection and overtemperature protection. Minimal
external components are necessary to develop a
complete synchronous step-down DC-DC converter
power supply.
High converter efficiency is achieved by integrating a
high-speed, current limited, low resistance, high-side
N-Channel MOSFET, as well as a high-speed, low
resistance, low-side N-Channel MOSFET and
associated drive circuitry. High switching frequency
minimizes the size of the inductor and output capacitor,
resulting in a small solution size.
The MCP16321/2 device can supply 1A/2A of
continuous current while regulating the output voltage
from 0.9V to 5V. A high-performance peak current
mode architecture keeps the output voltage tightly
regulated, even during input voltage steps and output
current transient conditions that are common in power
supplies.
The regulator can be turned on and off with a logic level
signal applied to the EN input. The EN input is internally
pulled up to a 4.2V reference and is rated for a
maximum of 6V. With EN low, typically 5 µA of current
is consumed from the input, making the part ideal for
power shedding and load distribution applications. The
PG output is an open-drain output pin used to interface
with other components of the system, and can be
pulled up to a maximum of 6V.
The output voltage can either be fixed at output
voltages of 0.9V, 1.5V, 1.8V, 2.5V, 3.3V, 5V or
adjustable using an external resistor divider. The
MCP16321/2 is offered in a 3x3 QFN-16 surface mount
package.
2011-2016 Microchip Technology Inc.
DS20002285B-page 1




MCP16322 pdf, 반도체, 판매, 대치품
MCP16321/2
DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics: Unless otherwise indicated, TA = +25°C, VIN = 12V, VOUT = 3.3V, IOUT = 300 mA,
L = 4.7 µH, COUT = 2x22 µF, CIN = 2x10 µF. Boldface specifications apply over the TJ range of -40°C to +125°C.
Parameters
Sym.
Min.
Typ.
Max. Units Conditions
PFM Mode Feedback
VFB-PFM
— VOUT + 1%
V
EN Input Characteristics
EN Input Logic High
EN Input Logic Low
EN Input Hysteresis
EN Input Leakage Current
Soft-Start Time
VIH
VIL
VEN-HYST
IENLK
tSS
2.2
——
— 480
— 3.5
— -1.5
—4
—V
0.8 V
— mV
— µA VEN = 5V
— µA VEN = 0V
— ms
Switching Characteristics
Switching Frequency
fSW
0.9 1
1.1 MHz Open Loop VFB
Low
Maximum Duty Cycle
DCMAX
95 97
99 % Open Loop VFB
Low
Note 1
Minimum Duty Cycle
—7
—%
NMOS Low-Side
Switch On Resistance
Low-Side RDS(ON)
120
— m
NMOS High-Side
Switch On Resistance
NMOS High-Side
Switch Current Limit
High-Side — 180
RDS(ON)
IN(MAX)
1.4 1.8
2.4 2.8
— m
2.4 A MCP16321
3.4 A MCP16322
PG Output Characteristics
PG Low-level
Output Voltage
PG High-Level Output Leak-
age Current
PG Release Timer
VOUT Undervoltage Threshold
VOUT Undervoltage
Hysteresis
VOUT Overvoltage
Threshold
VOUT Overvoltage
Hysteresis
PGIL
— — 0.01
IPGLK
— 0.5
tPG
VOUT-UV
VOUT-UV_HYST
91% VOUT
10
93% VOUT
1.5% VOUT
95% VOUT
VOUT-OV
— 103% VOUT
VOUT-OV_HYST
— 1% VOUT
V IPG = -0.3 mA
µA VPG = 5V
ms
Thermal Characteristics
Thermal Shutdown
Die Temperature
TSD
— 170
— °C
Die Temperature
Hysteresis
TSDHYS
— 10
— °C
Note 1: Regulator SW pin is forced off for 240 ns every eight cycles to ensure the BOOST cap is replenished.
DS20002285B-page 4
2011-2016 Microchip Technology Inc.

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MCP16322 전자부품, 판매, 대치품
MCP16321/2
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.
Note: Unless otherwise indicated, VIN = 12V, EN = Floating (Internally pulled up), CIN = 20 µF, COUT = 2x22 µF,
L = 4.7 µH (XAL6060-472MEB), ILOAD = 200 mA, TA = +25°C. MCP16321 maximum output current = 1A.
100
95 VIN = 6V
90
85 VIN = 12V
80
75 VIN = 18V
70
65 VIN = 24V
60
55
50
0.0 0.4 0.8 1.2
IOUT (A)
VOUT = 5V
1.6 2.0
FIGURE 2-1:
5V VOUT Efficiency vs. IOUT.
100
90
80
70
60
50
40
0
VIN = 6V
VIN = 12V
VIN = 18V
VOUT = 1.8V
0.4 0.8 1.2 1.6
IOUT (A)
2
FIGURE 2-4:
IOUT.
1.8V VOUT Efficiency vs.
95
VIN = 6V
90
85
80
75 VIN = 12V
70 VIN = 18V
65
60
55 VIN = 24V
50
0 0.4 0.8 1.2
IOUT (A)
VOUT = 3.3V
1.6
2
FIGURE 2-2:
IOUT.
3.3V VOUT Efficiency vs.
100
90 VIN = 6V
80
70
60
50
40
0
VIN = 12V
VIN = 18V
VIN = 24V
VOUT = 2.5V
0.4 0.8 1.2 1.6
IOUT (A)
2
FIGURE 2-3:
IOUT.
2.5V VOUT Efficiency vs.
90
85
VIN = 6V
VIN = 12V
80
75
70
65
60 VIN = 18V
55
50
VOUT = 1.5V
45
40
0 0.4 0.8 1.2 1.6
IOUT (A)
2
FIGURE 2-5:
IOUT.
1.5V VOUT Efficiency vs.
100
90
VIN = 6V
80
70
VIN = 8V
60
50 VIN = 10V
VOUT = 0.9V
40
0
0.4 0.8 1.2 1.6
IOUT (A)
2
FIGURE 2-6:
IOUT.
0.9V VOUT Efficiency vs.
2011-2016 Microchip Technology Inc.
DS20002285B-page 7

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