Microchip MCP16362 Manual

Microchip Ikke kategoriseret MCP16362

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2020-2021 Microchip Technology Inc. DS20006481B-page 1
MCP16361/2/3
Features
• Input Voltage Range: 4.0V to 48V
• Adjustable Output Voltage Range: 2.0V to 24V
• Integrated N-Channel Buck Switch: 100 mΩ
• 3A Output Current
• 2.2 MHz Fixed Frequency
• Shutdown Current: 5 µA typical
• Quiescent Current: 18 µA typical (not switching)
• Device Selectable Switching Mode
- Automatic Pulse Frequency Modulation/
Pulse Width Modulation (PFM/PWM)
Operation - MCP16361
- PWM only Mode of Operation - MCP16362
- PWM only Mode of Operation with Switching
Frequency Dithering for EMI constrained
applications - MCP16363
• Power Good Output
• Undervoltage Lockout (UVLO)
• Peak Current Mode Control
• Internal Compensation
• Internal Soft-Start
• Internal Bootstrap Diode
• Cycle-by-Cycle Peak Current Limit
• Overtemperature Protection
• Available Package: 8-lead 3x3 mm wettable
flanks VDFN (see Package Type)
• Passes Automotive AEC-Q100 Reliability Testing
Applications
• Automotive DC/DC and 48V Systems
• Microcontroller Bias Supply
• 24V Industrial Input DC-DC Conversion
• Set-Top Boxes, DSL Cable Modems
• Wall Cube Regulation
• SLA Battery-Powered Devices
• AC-DC Digital Control Power Sources
• Power Meters
• Medical and Health Care
• Distributed Power Supplies
General Description
The MCP16361/2/3 family of devices are highly
integrated, high-efficiency, fixed-frequency, step-down
DC-DC converters in a compact 8-lead 3x3 mm VDFN
package that operates from input voltage sources up to
48V. Integrated features include a high-side switch,
fixed-frequency Peak Current Mode Control, Internal
Compensation, Power Good, Peak Current Limit and
Overtemperature Protection. The MCP16361/2/3
provides all the active functions for local DC-DC
conversion, with fast transient response and accurate
regulation.
High efficiency conversion 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 size solution.
The MCP16361/2/3 can supply 3A of continuous
current while regulating the output voltage from 2.0V to
24V. 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 MCP16361 is capable of running in PFM/PWM
mode. It switches in PFM mode for light load conditions
and for large buck conversion ratios. This results in a
higher efficiency over all load ranges.
By comparison, the MCP16362 runs in PWM-only
mode, and is recommended for applications in which
the low-frequency component associated with PFM
mode of operation is not desirable.
Besides the two aforementioned options, the
MCP16363 is designed for EMI constrained
applications where reduced peak emissions are
required. This is achieved by sweeping the switching
frequency over a 10% range above the 2.2 MHz
nominal value.
Output voltage is set with an external resistor divider.
The Power Good output pin will go from logic low to
logic high (through an external pull-up resistor) once
the output voltage is within 93% of the nominal set
point. The EN input is used to turn the device on and
off. While off, only a few micro-amps of current are
consumed from the input.
The MCP16361/2/3 is offered in a space-saving 8-lead
3x3 mm VDFN wettable flanks surface mount package.
The MCP16361/2/3 also passes automotive AEC-
Q100 reliability testing.
48V Input, 3A Output, 2.2 MHz Switching Frequency,
Integrated Switch Step-Down Regulator
MCP16361/2/3
DS20006481B-page 2 2020-2021 Microchip Technology Inc.
Package Type
Functional Block Diagram
MCP16361/2/3
8-Lead 3x3 VDFN
(Top View)
1
2
3
4
8
7
6
5
EP
VIN
EN
FB
PG
SW
BOOST
BD
GND
* Includes Exposed Thermal Pad (EP); see Table 4-1.
Schottky
Diode
COUT
Slope
Comp
PWM
Latch
+
-
Overtemp
Precharge R
Comp
Amp
+
-
CCOMP
RCOMP
HS
Drive
CS
VREG
BG
REF
SS
VREF
OTEMP
Boost
Pre
Charge
2.2 MHz OSC
S
VOUT
VOUT
RSENSE
GND
VIN
EN
RTOP
RBOT
BOOST
SW
FB
VREF
SHDN all blocks
+
-
CIN
+
+
CBOOST
BD
+
-
0.93 x VREF
FB
PG
PFM
CTR
UVLO
L
VOUT

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MCP16362

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