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Freescale Semiconductor Electronic Components Datasheet

MC34713 Datasheet

Fully Integrated Single Switch-Mode Power Supply

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MC34713 pdf
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.



Freescale Semiconductor Electronic Components Datasheet

MC34713 Datasheet

Fully Integrated Single Switch-Mode Power Supply

No Preview Available !

MC34713 pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
SD
PG
FREQ
ILIM
VDDI
VREFIN
GND
Thermal
Monitoring
System
M1 Reset
ILIMIT
System
Control
Internal
Voltage
Regulator
VDDI
M2
VIN
BOOT
Prog Frequency
Discharge
Oscillator
Prog Soft Start
ISENSE
VDDI
Current
Monitoring
VIN VBOOT
PVIN
Buck
Control
Logic FSW
M3
Gate ISENSE
Driver
SW
ILIMIT
PWM
Comparator
M4
PGND
Bandgap
Regulator
VBG
Ramp
Generator
Error
Amplifier
COMP
INV
Reference
VBG
Selection
M5
VOUT
Discharge
Figure 2. 34713 Simplified Internal Block Diagram
34713
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Freescale Semiconductor Electronic Components Datasheet

MC34713 Datasheet

Fully Integrated Single Switch-Mode Power Supply

No Preview Available !

MC34713 pdf
PIN CONNECTIONS
PIN CONNECTIONS
24 23 22 21 20 19
GND 1
18 PVIN
FREQ 2
ILIM 3
PG 4
Transparent
Top View
17 SW
16 SW
15 SW
NC 5
SD 6
14 PGND
13 PGND
7 8 9 10 11 12
Figure 3. 34713 Pin Connections
Table 1. 34713 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 9.
Pin Number Pin Name Pin Function Formal Name
Definition
1
GND
Ground
Signal Ground
Analog signal ground of IC
2
FREQ
Passive Frequency Adjustment Buck converter switching frequency adjustment pin
3
ILIM Input
Soft Start
Soft Start adjustment
4
PG
Output
Power Good
Active-low (open drain) power-good status reporting pin
No internal connections to these pins. Recommend attaching a 0.1µF
5, 8
NC
None
No Connect
capacitor from pin 8 to GND.
6
7
9
10
11
12,13,14
15,16,17
18,19,20
21
22,23
24
SD
VREFIN
COMP
INV
VOUT
PGND
SW
PVIN
BOOT
VIN
VDDI
Input
Input
Passive
Input
Output
Ground
Power
Supply
Passive
Supply
Passive
Shutdown
Shutdown mode input control pin
Voltage-Tracking-
Reference Input
Voltage-Tracking-Reference voltage input
Compensation
Buck converter external compensation network pin
Error Amplifier
Inverting Input
Buck converter error amplifier inverting input pin
Output Voltage
Discharge FET
Discharge FET drain connection (connect to buck converter output
capacitors)
Power Ground
Ground return for buck converter and discharge FET
Switching Node Buck converter power switching node
Power-Circuit Supply Buck converter main supply voltage input
Input
Bootstrap
Bootstrap switching node (connect to bootstrap capacitor)
Logic-Circuit Supply Logic circuits supply voltage input
Input
Internal Voltage
Regulator
Internal Vdd Regulator (connect filter capacitor to this pin)
34713
Analog Integrated Circuit Device Data
Freescale Semiconductor
3




Part Number MC34713
Description Fully Integrated Single Switch-Mode Power Supply
Maker Freescale Semiconductor
Total Page 21 Pages
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