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Freescale Semiconductor Electronic Components Datasheet

MC34717 Datasheet

Fully Integrated Dual Switch-Mode Power Supply

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MC34717 pdf
Freescale Semiconductor
Advance Information
5.0 A 1.0 MHz Fully Integrated
Dual Switch-Mode Power
Supply
Document Number: MC34717
Rev 5.0, 12/2014
34717
The 34717 is a highly integrated, space-efficient, low cost, dual
synchronous buck switching regulator with integrated N-channel
power MOSFETs. It is a high performance dual point-of-load (PoL)
power supply with many desired features for the 3.3 and 5.0 V
environments.
Both channels can provide up to 5.0 A of continuous output current
capability with high efficiency and tight output regulation. The second
channel has the ability to track an external reference voltage in
different configurations.
The 34717 SMARTMOS device 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 26 pin exposed pad QFN.
Features
• 50 mintegrated N-channel power MOSFETs
• Input voltage operating range from 3.0 to 6.0 V
1% accurate output voltages, ranging from 0.7 to 3.6 V
• The second output has voltage tracking capability in different
configurations
• Programmable switching frequency range from 200 kHz to
1.0 MHz
• Programmable soft start timing
• Over-current limit and short-circuit protection
• Thermal shutdown
• Output overvoltage and undervoltage detection
• Active low power good output signal
• Active low shutdown input.
DUAL SWITCH-MODE POWER SUPPLY
EP SUFFIX (PB_FREE)
98ASA00702D
26-PIN QFN
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34717EP/R2 -40 °C to 85 °C
26 QFN
3.0 TO 6.0 V VIN
VOUT1
34717
VIN PVIN2
PVIN1
BOOT1 BOOT2
SW1 SW2
VOUT1 VOUT2
VOUT1
VOUT2
MCU
INV1 INV2
COMP1
PGND1
VDDI
FREQ
ILIM1
COMP2
PGND2
PG
SD
ILIM2 VREFIN
GND
VIN
VMASTER
Optional
Figure 1. 34717 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007-2014. All rights reserved.


Freescale Semiconductor Electronic Components Datasheet

MC34717 Datasheet

Fully Integrated Dual Switch-Mode Power Supply

No Preview Available !

MC34717 pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
PG
FREQ
ILIM1
BOOT1
PVIN1
SW1
PGND1
COMP1
INV1
VOUT1
SD
System
M1 Reset
Oscillator
Buck
Control
FSW
Logic
ISENSE2
ISENSE1
Current
Monitoring
ILIM2
ILIM1
System
Control
Thermal
Monitoring
VBG
Bandgap
Regulator
Discharge
Internal
Voltage
Regulator
M2
VIN
M4
Gate
ISENSE Driver
FSW
M5
Error
Amplifier
PWM
Comparator
Ramp
Generator
VBG
M8
Discharge
M3
VIN
M6
FSW
Gate
Driver
ISENSE
M7
PWM
Comparator
Ramp
Generator
Error
Amplifier
Reference
Selection
VBG
M9
Discharge
GND
CHANNEL 1
CHANNEL 2
VDDI
VIN
ILIM2
BOOT2
PVIN2
SW2
PGND2
COMP2
INV2
VOUT2
VREFIN
Figure 2. 34717 Simplified Internal Block Diagram
34717
2
Analog Integrated Circuit Device Data
Freescale Semiconductor


Part Number MC34717
Description Fully Integrated Dual Switch-Mode Power Supply
Maker Freescale Semiconductor
Total Page 30 Pages
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