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PDF 34713 Data sheet ( Hoja de datos )

Número de pieza 34713
Descripción Single Switch-Mode Power Supply
Fabricantes Freescale Semiconductor 
Logotipo Freescale Semiconductor Logotipo



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No Preview Available ! 34713 Hoja de datos, Descripción, Manual

Freescale Semiconductor
Advance Information
Document Number: MC34713
Rev. 4.0, 5/2007
5.0 A 1.0 MHz Fully Integrated
Single Switch-Mode Power
Supply
34713
The 34713 is a highly integrated, space efficient, low cost, single
synchronous buck switching regulator with integrated N-channel
power MOSFETs. It is a high performance point-of-load (PoL) power
supply with the ability to track an external reference voltage in
different configurations.
Its high efficient 5.0 A continuous output current capability
combined with its voltage tracking/sequencing ability and tight output
regulation, makes it ideal as a single power supply.
The 34713 offers the designer the flexibility of many control,
supervisory, and protection functions to allow for easy implementation
of complex designs. It is housed in a Pb-Free, thermally enhanced,
and space-efficient 24-Pin Exposed Pad QFN.
Features
• 45 mIntegrated N-Channel Power MOSFETs
• Input Voltage Operating Range from 3.0 V to 6.0 V
±1 % Accurate Output Voltage, Ranging from 0.7 V to 3.6 V
• Voltage Tracking Capability in different configurations.
• Programmable Switching Frequency Range from 200 kHz to
1.0 MHz with a default of 1.0 MHz
• Programmable Soft Start Timing
• Over Current Limit and Short Circuit Protection
www.DataSheet4U.com • Thermal Shutdown
• Output Overvoltage and Undervoltage Detection
• Active Low Power Good Output Signal
• Active Low Shutdown Input
• Pb-Free Packaging Designated by Suffix Code EP.
SWITCH-MODE POWER SUPPLY
EP SUFFIX
98ARL10577D
24-PIN QFN
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34713EP/R2
-40 to 85°C
24 QFN
(3.0V TO 6.0V) VIN
VMASTER
34713
VIN PVIN
VREFIN
PGND
VDDI
BOOT
SW
INV
VOUT
FREQ
ILIM
GND
COMP
VOUT
PG
SD
VIN
Figure 1. 34713 Simplified Application Diagram
MICROCONTROLLER
DSP,
FPGA,
ASIC
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.

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34713 pdf
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings (continued)
All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or
permanent damage to the device.
Ratings
Symbol
Value
Unit
THERMAL RESISTANCE (7)
Thermal Resistance, Junction to Ambient, Single-Layer Board (1s) (8)
RθJA
139 °C/W
Thermal Resistance, Junction to Ambient, Four-Layer Board (2s2p) (9)
RθJMA
43
°C/W
Thermal Resistance, Junction to Board (10)
RθJB
22 °C/W
Notes
7. The PVIN, SW, and PGND pins comprise the main heat conduction paths.
8. Per SEMI G38-87 and JEDEC JESD51-2 with the single-layer board (JESD51-3) horizontal.
9. Per JEDEC JESD51-6 with the board (JESD51-7) horizontal. There are no thermal vias connecting the package to the two planes in the
board.
10. Thermal resistance between the device and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top
surface of the board near the package.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34713
5

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34713 arduino
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
threshold, this block will alert the system control for
further commands.
• Output Overvoltage and Undervoltage Monitoring: This
block monitors the buck converter output voltage to
ensure it is within regulation boundaries. If not, this
block alerts the system control for further commands.
CONTROL AND SUPERVISORY FUNCTIONS
This block is used to interface with an outside host. It
contains the following circuits:
• Shutdown Control Input: An outside host can put the
34713 device into shutdown mode by sending a logic
“0” to the SD pin.
• Power Good Output Signal PG: The 34713 can
communicate to an external host that a fault has
occurred by releasing the drive on the PG pin high,
allowing the signal/pin to be pulled high by the external
pull-up resistor.
TRACKING AND SEQUENCING
This block allows the output of the 34713 to track the
voltage applied at the VREFIN pin in different tracking
configurations. This will be discussed in further details later in
this document. For power down during a shutdown mode, the
34713 uses internal discharge MOSFET (Figure 2) to
discharge the output. The discharge MOSFET is only active
during shutdown mode. Using this block along with
controlling the SD pin can offer the user power sequencing
capabilities by controlling when to turn the 34713 output on or
off.
BUCK CONVERTER
This block provides the main function of the 34713: DC to
DC conversion from an un-regulated input voltage to a
regulated output voltage used by the loads for reliable
operation. The buck converter is a high performance, fixed
frequency (externally adjustable), synchronous buck PWM
voltage-mode control. It drives integrated 45 mN-channel
power MOSFETs saving board space and enhancing
efficiency. The switching regulator output voltage is
adjustable with an accuracy of less than ±2 % to meet today’s
requirements. Its output has the ability to track the voltage
applied at the VREFIN pin. The regulator's voltage control
loop is compensated using a type III compensation network,
with external components to allow for optimizing the loop
compensation, for a wide range of operating conditions. A
typical Bootstrap circuit with an internal PMOS switch is used
to provide the voltage necessary to properly enhance the
high-side MOSFET gate.
The 34713 has the ability to supply up to 5.0 A of
continuous current, making it suitable for many high current
applications.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34713
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