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PDF MCP16301H Data sheet ( Hoja de datos )
| Número de pieza | MCP16301H | |
| Descripción | High-Voltage Input Integrated Switch Step-Down Regulator | |
| Fabricantes | Microchip | |
| Logotipo |  |
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MCP16301/H
High-Voltage Input Integrated Switch Step-Down Regulator
Features
• Up to 96% Typical Efficiency
• Input Voltage Range:
- 4.0V to 30V (MCP16301)
- 4.7V to 36V (MCP16301H)
• Output Voltage Range: 2.0V to 15V
• 2% Output Voltage Accuracy
• Qualification: AEC-Q100 Rev G, Grade 1
(-40°C to +125°C)
• Integrated N-Channel Buck Switch: 460 m
• Minimum 600 mA Output Current Over All Input
Voltage Range (See Figure 2-6 for Maximum
Output Current vs. VIN):
- up to 1A output current at 3.3V, 5V and 12V
VOUT, SOT-23 package at +25°C ambient
temperature
• 500 kHz Fixed Frequency
• Adjustable Output Voltage
• 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): 3.5V
• Overtemperature Protection
• Available Package: SOT-23-6
Applications
• PIC® Microcontroller and dsPIC® Digital Signal
Controller Bias Supply
• 24V 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
• D2 Package Linear Regulator Replacement
- See Figure 5-2
• Consumer
• Medical and Health Care
• Distributed Power Supplies
General Description
The MCP16301/H devices are highly integrated,
high-efficiency, fixed-frequency, step-down DC-DC
converters in a popular 6-pin SOT-23 package that
operates from input voltage sources up to 36V.
Integrated features include a high-side switch,
fixed-frequency peak current mode control, internal
compensation, peak current limit and overtemperature
protection. Minimal external components are
necessary to develop a complete step-down DC-DC
converter power supply.
High converter efficiency is achieved by integrating the
current-limited, low-resistance, high-speed N-Channel
MOSFET and associated drive circuitry. High
switching frequency minimizes the size of external
filtering components, resulting in a small solution size.
The MCP16301/H devices can supply 600 mA of
continuous current while regulating the output voltage
from 2.0V to 15V. An integrated, 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 systems.
The EN input is used to turn the device on and off.
While turned off, only a few micro amps of current are
consumed from the input for power shedding and load
distribution applications.
Output voltage is set with an external resistor divider.
The MCP16301/H devices are offered in a
space-saving SOT-23-6 surface mount package.
Package Type
MCP16301/H
6-Lead SOT-23
BOOST 1
GND 2
VFB 3
6 SW
5 VIN
4 EN
2011-2015 Microchip Technology Inc.
DS20005004D-page 1
1 page  
MCP16301/H
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 = EN = 12V, COUT = CIN = 2 X 10 µF, L = 15 µH, VOUT = 3.3V, ILOAD = 200 mA,
TA = +25°C.
90
VIN = 6V
80
70 VIN = 12V
60
VIN = 30V
VOUT = 2.0V
50
40
30
0
100
FIGURE 2-1:
IOUT.
200 300 400 500 600
IOUT (mA)
2.0V VOUT Efficiency vs.
100
90
80
VIN = 16V
VIN = 24V
VIN = 30V
70 VOUT = 12.0V
60
50
40
30
0
100
FIGURE 2-4:
IOUT.
200 300 400 500 600
IOUT (mA)
12V VOUT Efficiency vs.
100
90 VIN = 6V
80
VIN = 12V
70
60
VIN = 30V
VOUT = 3.3V
50
40
30
0
100
FIGURE 2-2:
IOUT.
200 300 400 500 600
IOUT (mA)
3.3V VOUT Efficiency vs.
100
90
80
70
VIN = 6V
VIN = 12V
VIN = 30V
60
VOUT = 5.0V
50
40
30
0
100
FIGURE 2-3:
IOUT.
200 300 400 500 600
IOUT (mA)
5.0V VOUT Efficiency vs.
100
90
80
VIN = 24V
VIN = 16V
VIN = 30V
70
60 VOUT = 15.0V
50
40
30
0
100
FIGURE 2-5:
IOUT.
200 300 400 500 600
IOUT (mA)
15V VOUT Efficiency vs.
1400
1200
VOUT = 3.3V
1000
800
VOUT = 5V
600
400
200
0
6 12
FIGURE 2-6:
vs. VIN.
VOUT = 12V
18 24 30 36
VIN (V)
Maximum Output Current
2011-2015 Microchip Technology Inc.
DS20005004D-page 5
5 Page 
4.0 DETAILED DESCRIPTION
4.1 Device Overview
The MCP16301/H devices are high-input voltage
step-down regulators, capable of supplying 600 mA to
a regulated output voltage from 2.0V to 15V. Internally,
the trimmed 500 kHz oscillator provides a fixed
frequency, while the peak current mode control
architecture varies the duty cycle for output voltage
regulation. An internal floating driver is used to turn the
high-side integrated N-Channel MOSFET on and off.
The power for this driver is derived from an external
boost capacitor whose energy is supplied from a fixed
voltage ranging from 3.0V to 5.5V, typically the input or
output voltage of the converter. For applications with an
output voltage outside of this range, such as 12V, the
boost capacitor bias can be derived from the output
using a simple Zener diode regulator.
4.1.1 INTERNAL REFERENCE VOLTAGE
(VREF)
An integrated precise 0.8V reference combined with an
external resistor divider sets the desired converter
output voltage. The resistor divider range can vary
without affecting the control system gain. High-value
resistors consume less current, but are more
susceptible to noise.
4.1.2 INTERNAL COMPENSATION
All control system components necessary for stable
operation over the entire device operating range are
integrated, including the error amplifier and inductor
current slope compensation. To add the proper amount
of slope compensation, the inductor value changes
along with the output voltage (see Table 5-1).
4.1.3 EXTERNAL COMPONENTS
External components consist of:
• input capacitor
• output filter (inductor and capacitor)
• freewheeling diode
• boost capacitor
• boost blocking diode
• resistor divider.
The selection of the external inductor, output capacitor,
input capacitor and freewheeling diode is dependent
upon the output voltage and the maximum output
current.
MCP16301/H
4.1.4 ENABLE INPUT
Enable input, (EN), is used to enable and disable the
device. If disabled, the MCP16301/H devices consume
a minimal current from the input. Once enabled, the
internal soft start controls the output voltage rate of rise,
preventing high-inrush current and output voltage
overshoot.
4.1.5 SOFT START
The internal reference voltage rate of rise is controlled
during start-up, minimizing the output voltage over-
shoot and the inrush current.
4.1.6 UNDERVOLTAGE LOCKOUT
An integrated Undervoltage Lockout (UVLO) prevents
the converter from starting until the input voltage is high
enough for normal operation. The converter will typically
start at 3.5V and operate down to 3.0V. Hysteresis is
added to prevent starting and stopping during start-up,
as a result of loading the input voltage source.
4.1.7
OVERTEMPERATURE
PROTECTION
Overtemperature protection limits the silicon die
temperature to +150°C by turning the converter off. The
normal switching resumes at +120°C.
2011-2015 Microchip Technology Inc.
DS20005004D-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP16301H.PDF ] | |
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